diff --git a/static_src/elements/chdir/mr-activity-table/mr-activity-table.js b/static_src/elements/chdir/mr-activity-table/mr-activity-table.js
new file mode 100644
index 0000000..a0f4715
--- /dev/null
+++ b/static_src/elements/chdir/mr-activity-table/mr-activity-table.js
@@ -0,0 +1,129 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import './mr-day-icon.js';
+
+const MONTH_NAMES = ['January', 'February', 'March', 'April', 'May', 'June',
+  'July', 'August', 'September', 'October', 'November', 'December'];
+const WEEKDAY_ABBREVIATIONS = 'M T W T F S S'.split(' ');
+const SECONDS_PER_DAY = 24 * 60 * 60;
+// Only show comments from this many days ago and later.
+const MAX_COMMENT_AGE = 31 * 3;
+
+export class MrActivityTable extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: grid;
+        grid-auto-flow: column;
+        grid-auto-columns: repeat(13, auto);
+        grid-template-rows: repeat(7, auto);
+        margin: auto;
+        width: 90%;
+        text-align: center;
+        line-height: 110%;
+        align-items: center;
+        justify-content: space-between;
+      }
+      :host[hidden] {
+        display: none;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      ${WEEKDAY_ABBREVIATIONS.map((weekday) => html`<span>${weekday}</span>`)}
+      ${this._weekdayOffset.map(() => html`<span></span>`)}
+      ${this._activityArray.map((day) => html`
+        <mr-day-icon
+          .selected=${this.selectedDate === day.date}
+          .commentCount=${day.commentCount}
+          .date=${day.date}
+          @click=${this._selectDay}
+        ></mr-day-icon>
+      `)}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      comments: {type: Array},
+      selectedDate: {type: Number},
+    };
+  }
+
+  _selectDay(event) {
+    const target = event.target;
+    if (this.selectedDate === target.date) {
+      this.selectedDate = undefined;
+    } else {
+      this.selectedDate = target.date;
+    }
+
+    this.dispatchEvent(new CustomEvent('dateChange', {
+      detail: {
+        date: this.selectedDate,
+      },
+    }));
+  }
+
+  get months() {
+    const currentMonth = (new Date()).getMonth();
+    return [MONTH_NAMES[currentMonth],
+      MONTH_NAMES[currentMonth - 1],
+      MONTH_NAMES[currentMonth - 2]];
+  }
+
+  get _weekdayOffset() {
+    const startDate = new Date(this._activityArray[0].date * 1000);
+    const startWeekdayNum = startDate.getDay()-1;
+    const emptyDays = [];
+    for (let i = 0; i < startWeekdayNum; i++) {
+      emptyDays.push(' ');
+    }
+    return emptyDays;
+  }
+
+  get _todayUnixTime() {
+    const now = new Date();
+    const today = new Date(Date.UTC(
+        now.getUTCFullYear(),
+        now.getUTCMonth(),
+        now.getUTCDate(),
+        24, 0, 0));
+    const todayEndTime = today.getTime() / 1000;
+    return todayEndTime;
+  }
+
+  get _activityArray() {
+    const todayUnixEndTime = this._todayUnixTime;
+    const comments = this.comments || [];
+
+    const activityArray = [];
+    for (let i = 0; i < MAX_COMMENT_AGE; i++) {
+      const arrayDate = (todayUnixEndTime - ((i) * SECONDS_PER_DAY));
+      activityArray.unshift({
+        commentCount: 0,
+        date: arrayDate,
+      });
+    }
+
+    for (let i = 0; i < comments.length; i++) {
+      const commentAge = Math.floor(
+          (todayUnixEndTime - comments[i].timestamp) / SECONDS_PER_DAY);
+      if (commentAge < MAX_COMMENT_AGE) {
+        const pos = MAX_COMMENT_AGE - commentAge - 1;
+        activityArray[pos].commentCount++;
+      }
+    }
+
+    return activityArray;
+  }
+}
+customElements.define('mr-activity-table', MrActivityTable);
diff --git a/static_src/elements/chdir/mr-activity-table/mr-activity-table.test.js b/static_src/elements/chdir/mr-activity-table/mr-activity-table.test.js
new file mode 100644
index 0000000..0eb9d30
--- /dev/null
+++ b/static_src/elements/chdir/mr-activity-table/mr-activity-table.test.js
@@ -0,0 +1,57 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrActivityTable} from './mr-activity-table.js';
+import sinon from 'sinon';
+
+const SECONDS_PER_DAY = 24 * 60 * 60;
+
+let element;
+
+describe('mr-activity-table', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-activity-table');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrActivityTable);
+  });
+
+  it('no comments makes empty activity array', () => {
+    element.comments = [];
+
+    for (let i = 0; i < 93; i++) {
+      assert.equal(0, element._activityArray[i].commentCount);
+    }
+  });
+
+  it('activity array handles old comments', () => {
+    // 94 days since EPOCH.
+    sinon.stub(element, '_todayUnixTime').get(() => 94 * SECONDS_PER_DAY);
+
+    element.comments = [
+      {content: 'blah', timestamp: 0}, // too old.
+      {content: 'ignore', timestamp: 100}, // too old.
+      {
+        content: 'comment',
+        timestamp: SECONDS_PER_DAY + 1, // barely young enough.
+      },
+      {content: 'hello', timestamp: SECONDS_PER_DAY + 10}, // same day as above.
+      {content: 'world', timestamp: SECONDS_PER_DAY * 94}, // today
+    ];
+
+    assert.equal(93, element._activityArray.length);
+    assert.equal(2, element._activityArray[0].commentCount);
+    for (let i = 1; i < 92; i++) {
+      assert.equal(0, element._activityArray[i].commentCount);
+    }
+    assert.equal(1, element._activityArray[92].commentCount);
+  });
+});
diff --git a/static_src/elements/chdir/mr-activity-table/mr-day-icon.js b/static_src/elements/chdir/mr-activity-table/mr-day-icon.js
new file mode 100644
index 0000000..82f62b3
--- /dev/null
+++ b/static_src/elements/chdir/mr-activity-table/mr-day-icon.js
@@ -0,0 +1,91 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+export class MrDayIcon extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        background-color: hsl(0, 0%, 95%);
+        margin: 0.25em 8px;
+        height: 20px;
+        width: 20px;
+        border: 2px solid white;
+        transition: border-color .5s ease-in-out;
+      }
+      :host(:hover) {
+        cursor: pointer;
+        border-color: hsl(87, 20%, 45%);
+      }
+      :host([activityLevel="0"]) {
+        background-color: var(--chops-blue-gray-50);
+      }
+      :host([activityLevel="1"]) {
+        background-color: hsl(87, 70%, 87%);
+      }
+      :host([activityLevel="2"]) {
+        background-color: hsl(88, 67%, 72%);
+      }
+      :host([activityLevel="3"]) {
+        background-color: hsl(87, 80%, 40%);
+      }
+      :host([selected]) {
+        border-color: hsl(0, 0%, 13%);
+      }
+      .hover-card {
+        display: none;
+      }
+      :host(:hover) .hover-card {
+        display: block;
+        position: relative;
+        width: 150px;
+        padding: 0.5em 8px;
+        background: rgba(0, 0, 0, 0.6);
+        color: var(--chops-white);
+        border-radius: 8px;
+        top: 120%;
+        left: 50%;
+        transform: translateX(-50%);
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <div class="hover-card">
+        ${this.commentCount} Comments<br>
+        <chops-timestamp .timestamp=${this.date}></chops-timestamp>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      activityLevel: {
+        type: Number,
+        reflect: true,
+      },
+      commentCount: {type: Number},
+      date: {type: Number},
+      selected: {
+        type: Boolean,
+        reflect: true,
+      },
+    };
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('commentCount')) {
+      const level = Math.ceil(this.commentCount / 2);
+      this.activityLevel = Math.min(level, 3);
+    }
+    super.update(changedProperties);
+  }
+}
+customElements.define('mr-day-icon', MrDayIcon);
diff --git a/static_src/elements/chdir/mr-activity-table/mr-day-icon.test.js b/static_src/elements/chdir/mr-activity-table/mr-day-icon.test.js
new file mode 100644
index 0000000..3c35a10
--- /dev/null
+++ b/static_src/elements/chdir/mr-activity-table/mr-day-icon.test.js
@@ -0,0 +1,24 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrDayIcon} from './mr-day-icon.js';
+
+
+let element;
+
+describe('mr-day-icon', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-day-icon');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrDayIcon);
+  });
+});
diff --git a/static_src/elements/chdir/mr-comment-table/mr-comment-table.js b/static_src/elements/chdir/mr-comment-table/mr-comment-table.js
new file mode 100644
index 0000000..a6d0f19
--- /dev/null
+++ b/static_src/elements/chdir/mr-comment-table/mr-comment-table.js
@@ -0,0 +1,130 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import 'elements/framework/mr-comment-content/mr-comment-content.js';
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+
+/**
+ * `<mr-comment-table>`
+ *
+ * The list of comments for a Monorail Polymer profile.
+ *
+ */
+export class MrCommentTable extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      .ellipsis {
+        max-width: 50%;
+        text-overflow: ellipsis;
+        overflow: hidden;
+        white-space: nowrap;
+      }
+      table {
+        word-wrap: break-word;
+        width: 100%;
+      }
+      tr {
+        font-size: var(--chops-main-font-size);
+        font-weight: normal;
+        text-align: left;
+        line-height: 180%;
+      }
+      td, th {
+        border-bottom: var(--chops-normal-border);
+        padding: 0.25em 16px;
+      }
+      td {
+        text-overflow: ellipsis;
+      }
+      th {
+        text-align: left;
+      }
+      .no-wrap {
+        white-space: nowrap;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    const comments = this._displayedComments(this.selectedDate, this.comments);
+    // TODO(zhangtiff): render deltas for comment changes.
+    return html`
+      <table cellspacing="0" cellpadding="0">
+        <tbody>
+           <tr id="heading-row">
+            <th>Date</th>
+            <th>Project</th>
+            <th>Comment</th>
+            <th>Issue Link</th>
+          </tr>
+
+          ${comments && comments.length ? comments.map((comment) => html`
+            <tr id="row">
+              <td class="no-wrap">
+                <chops-timestamp
+                  .timestamp=${comment.timestamp}
+                  short
+                ></chops-timestamp>
+              </td>
+              <td>${comment.projectName}</td>
+              <td class="ellipsis">
+                <mr-comment-content
+                  .content=${this._truncateMessage(comment.content)}
+                ></mr-comment-content>
+              </td>
+              <td class="no-wrap">
+                <a href="/p/${comment.projectName}/issues/detail?id=${comment.localId}">
+                  Issue ${comment.localId}
+                </a>
+              </td>
+            </tr>
+          `) : html`
+            <tr>
+              <td colspan="4"><i>No comments.</i></td>
+            </tr>
+          `}
+        </tbody>
+      </table>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      comments: {type: Array},
+      selectedDate: {type: Number},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.comments = [];
+  }
+
+  _truncateMessage(message) {
+    return message && message.substring(0, message.indexOf('\n'));
+  }
+
+  _displayedComments(selectedDate, comments) {
+    if (!selectedDate) {
+      return comments;
+    } else {
+      const computedComments = [];
+      if (!comments) return computedComments;
+
+      for (let i = 0; i < comments.length; i++) {
+        if (comments[i].timestamp <= selectedDate &&
+           comments[i].timestamp >= (selectedDate - 86400)) {
+          computedComments.push(comments[i]);
+        }
+      }
+      return computedComments;
+    }
+  }
+}
+customElements.define('mr-comment-table', MrCommentTable);
diff --git a/static_src/elements/chdir/mr-comment-table/mr-comment-table.test.js b/static_src/elements/chdir/mr-comment-table/mr-comment-table.test.js
new file mode 100644
index 0000000..6925dc4
--- /dev/null
+++ b/static_src/elements/chdir/mr-comment-table/mr-comment-table.test.js
@@ -0,0 +1,24 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrCommentTable} from './mr-comment-table.js';
+
+
+let element;
+
+describe('mr-comment-table', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-comment-table');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrCommentTable);
+  });
+});
diff --git a/static_src/elements/chdir/mr-profile-page/mr-profile-page.js b/static_src/elements/chdir/mr-profile-page/mr-profile-page.js
new file mode 100644
index 0000000..5fadff6
--- /dev/null
+++ b/static_src/elements/chdir/mr-profile-page/mr-profile-page.js
@@ -0,0 +1,156 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {prpcClient} from 'prpc-client-instance.js';
+
+import 'elements/framework/mr-header/mr-header.js';
+import '../mr-activity-table/mr-activity-table.js';
+import '../mr-comment-table/mr-comment-table.js';
+
+/**
+ * `<mr-profile-page>`
+ *
+ * The main entry point for a Monorail web components profile.
+ *
+ */
+export class MrProfilePage extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      .history-container {
+        padding: 1em 16px;
+        display: flex;
+        flex-direction: column;
+        min-height: 100%;
+        box-sizing: border-box;
+        flex-grow: 1;
+      }
+      mr-comment-table {
+        width: 100%;
+        margin-bottom: 1em;
+        box-sizing: border-box;
+      }
+      mr-activity-table {
+        width: 70%;
+        flex-grow: 0;
+        margin: auto;
+        margin-bottom: 5em;
+        height: 200px;
+        box-sizing: border-box;
+      }
+      .metadata-container {
+        font-size: var(--chops-main-font-size);
+        border-right: var(--chops-normal-border);
+        width: 15%;
+        min-width: 256px;
+        flex-grow: 0;
+        flex-shrink: 0;
+        box-sizing: border-box;
+        min-height: 100%;
+      }
+      .container-outside {
+        box-sizing: border-box;
+        width: 100%;
+        max-width: 100%;
+        margin: auto;
+        padding: 0.75em 8px;
+        display: flex;
+        align-items: stretch;
+        justify-content: space-between;
+        flex-direction: row;
+        flex-wrap: no-wrap;
+        flex-grow: 0;
+        min-height: 100%;
+      }
+      .profile-data {
+        text-align: center;
+        padding-top: 40%;
+        font-size: var(--chops-main-font-size);
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <mr-header
+        .userDisplayName=${this.user}
+        .loginUrl=${this.loginUrl}
+        .logoutUrl=${this.logoutUrl}
+      >
+        <span slot="subheader">
+          &gt; Viewing Profile: ${this.viewedUser}
+        </span>
+      </mr-header>
+      <div class="container-outside">
+        <div class="metadata-container">
+          <div class="profile-data">
+            ${this.viewedUser} <br>
+            <b>Last visit:</b> ${this.lastVisitStr} <br>
+            <b>Starred Developers:</b>
+            ${this.starredUsers.length ? this.starredUsers.join(', ') : 'None'}
+          </div>
+        </div>
+        <div class="history-container">
+          ${this.user === this.viewedUser ? html`
+            <mr-activity-table
+              .comments=${this.comments}
+              @dateChange=${this._changeDate}
+            ></mr-activity-table>
+          `: ''}
+          <mr-comment-table
+            .user=${this.viewedUser}
+            .viewedUserId=${this.viewedUserId}
+            .comments=${this.comments}
+            .selectedDate=${this.selectedDate}>
+          </mr-comment-table>
+        </div>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      user: {type: String},
+      logoutUrl: {type: String},
+      loginUrl: {type: String},
+      viewedUser: {type: String},
+      viewedUserId: {type: Number},
+      lastVisitStr: {type: String},
+      starredUsers: {type: Array},
+      comments: {type: Array},
+      selectedDate: {type: Number},
+    };
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('viewedUserId')) {
+      this._fetchActivity();
+    }
+  }
+
+  async _fetchActivity() {
+    const commentMessage = {
+      userRef: {
+        userId: this.viewedUserId,
+      },
+    };
+
+    const resp = await prpcClient.call(
+        'monorail.Issues', 'ListActivities', commentMessage
+    );
+
+    this.comments = resp.comments;
+  }
+
+  _changeDate(e) {
+    if (!e.detail) return;
+    this.selectedDate = e.detail.date;
+  }
+}
+
+customElements.define('mr-profile-page', MrProfilePage);
diff --git a/static_src/elements/chdir/mr-profile-page/mr-profile-page.test.js b/static_src/elements/chdir/mr-profile-page/mr-profile-page.test.js
new file mode 100644
index 0000000..c967704
--- /dev/null
+++ b/static_src/elements/chdir/mr-profile-page/mr-profile-page.test.js
@@ -0,0 +1,24 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrProfilePage} from './mr-profile-page.js';
+
+
+let element;
+
+describe('mr-profile-page', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-profile-page');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrProfilePage);
+  });
+});
diff --git a/static_src/elements/chops/chops-announcement/chops-announcement.js b/static_src/elements/chops/chops-announcement/chops-announcement.js
new file mode 100644
index 0000000..477e7d2
--- /dev/null
+++ b/static_src/elements/chops/chops-announcement/chops-announcement.js
@@ -0,0 +1,181 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+// URL where announcements are fetched from.
+const ANNOUNCEMENT_SERVICE =
+  'https://chopsdash.appspot.com/prpc/dashboard.ChopsAnnouncements/SearchAnnouncements';
+
+// Prefix prepended to responses for security reasons.
+export const XSSI_PREFIX = ')]}\'';
+
+const FETCH_HEADERS = Object.freeze({
+  'accept': 'application/json',
+  'content-type': 'application/json',
+});
+
+// How often to refresh announcements.
+export const REFRESH_TIME_MS = 5 * 60 * 1000;
+
+/**
+ * @typedef {Object} Announcement
+ * @property {string} id
+ * @property {string} messageContent
+ */
+
+/**
+ * @typedef {Object} AnnouncementResponse
+ * @property {Array<Announcement>} announcements
+ */
+
+/**
+ * `<chops-announcement>` displays a ChopsDash message when there's an outage
+ * or other important announcement.
+ *
+ * @customElement chops-announcement
+ */
+export class ChopsAnnouncement extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+        width: 100%;
+      }
+      p {
+        display: block;
+        color: #222;
+        font-size: 13px;
+        background: #FFCDD2; /* Material design red */
+        width: 100%;
+        text-align: center;
+        padding: 0.5em 16px;
+        box-sizing: border-box;
+        margin: 0;
+        /* Using a red-tinted grey border makes hues feel harmonious. */
+        border-bottom: 1px solid #D6B3B6;
+      }
+    `;
+  }
+  /** @override */
+  render() {
+    if (this._error) {
+      return html`<p><strong>Error: </strong>${this._error}</p>`;
+    }
+    return html`
+      ${this._announcements.map(
+      ({messageContent}) => html`<p>${messageContent}</p>`)}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      service: {type: String},
+      _error: {type: String},
+      _announcements: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /** @type {string} */
+    this.service = undefined;
+    /** @type {string} */
+    this._error = undefined;
+    /** @type {Array<Announcement>} */
+    this._announcements = [];
+
+    /** @type {number} Interval ID returned by window.setInterval. */
+    this._interval = undefined;
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('service')) {
+      if (this.service) {
+        this.startRefresh();
+      } else {
+        this.stopRefresh();
+      }
+    }
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    this.stopRefresh();
+  }
+
+  /**
+   * Set up autorefreshing logic or announcement information.
+   */
+  startRefresh() {
+    this.stopRefresh();
+    this.refresh();
+    this._interval = window.setInterval(() => this.refresh(), REFRESH_TIME_MS);
+  }
+
+  /**
+   * Logic for clearing refresh behavior.
+   */
+  stopRefresh() {
+    if (this._interval) {
+      window.clearInterval(this._interval);
+    }
+  }
+
+  /**
+   * Refresh the announcement banner.
+   */
+  async refresh() {
+    try {
+      const {announcements = []} = await this.fetch(this.service);
+      this._error = undefined;
+      this._announcements = announcements;
+    } catch (e) {
+      this._error = e.message;
+      this._announcements = [];
+    }
+  }
+
+  /**
+   * Fetches the announcement for a given service.
+   * @param {string} service Name of the service to fetch from ChopsDash.
+   *   ie: "monorail"
+   * @return {Promise<AnnouncementResponse>} ChopsDash response JSON.
+   * @throws {Error} If something went wrong while fetching.
+   */
+  async fetch(service) {
+    const message = {
+      retired: false,
+      platformName: service,
+    };
+
+    const response = await window.fetch(ANNOUNCEMENT_SERVICE, {
+      method: 'POST',
+      headers: FETCH_HEADERS,
+      body: JSON.stringify(message),
+    });
+
+    if (!response.ok) {
+      throw new Error('Something went wrong while fetching announcements');
+    }
+
+    // We can't use response.json() because of the XSSI prefix.
+    const text = await response.text();
+
+    if (!text.startsWith(XSSI_PREFIX)) {
+      throw new Error(`No XSSI prefix in announce response: ${XSSI_PREFIX}`);
+    }
+
+    return JSON.parse(text.substr(XSSI_PREFIX.length));
+  }
+}
+
+customElements.define('chops-announcement', ChopsAnnouncement);
diff --git a/static_src/elements/chops/chops-announcement/chops-announcement.test.js b/static_src/elements/chops/chops-announcement/chops-announcement.test.js
new file mode 100644
index 0000000..fa9643f
--- /dev/null
+++ b/static_src/elements/chops/chops-announcement/chops-announcement.test.js
@@ -0,0 +1,194 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {assert} from 'chai';
+import {ChopsAnnouncement, REFRESH_TIME_MS,
+  XSSI_PREFIX} from './chops-announcement.js';
+import sinon from 'sinon';
+
+let element;
+let clock;
+
+describe('chops-announcement', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-announcement');
+    document.body.appendChild(element);
+
+    clock = sinon.useFakeTimers({
+      now: new Date(0),
+      shouldAdvanceTime: false,
+    });
+
+    sinon.stub(window, 'fetch');
+  });
+
+  afterEach(() => {
+    if (document.body.contains(element)) {
+      document.body.removeChild(element);
+    }
+
+    clock.restore();
+
+    window.fetch.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsAnnouncement);
+  });
+
+  it('does not request announcements when no service specified', async () => {
+    sinon.stub(element, 'fetch');
+
+    element.service = '';
+
+    await element.updateComplete;
+
+    sinon.assert.notCalled(element.fetch);
+  });
+
+  it('requests announcements when service is specified', async () => {
+    sinon.stub(element, 'fetch');
+
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetch);
+  });
+
+  it('refreshes announcements regularly', async () => {
+    sinon.stub(element, 'fetch');
+
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetch);
+
+    clock.tick(REFRESH_TIME_MS);
+
+    await element.updateComplete;
+
+    sinon.assert.calledTwice(element.fetch);
+  });
+
+  it('stops refreshing when service removed', async () => {
+    sinon.stub(element, 'fetch');
+
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetch);
+
+    element.service = '';
+
+    await element.updateComplete;
+    clock.tick(REFRESH_TIME_MS);
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetch);
+  });
+
+  it('stops refreshing when element is disconnected', async () => {
+    sinon.stub(element, 'fetch');
+
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetch);
+
+    document.body.removeChild(element);
+
+    await element.updateComplete;
+    clock.tick(REFRESH_TIME_MS);
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetch);
+  });
+
+  it('renders error when thrown', async () => {
+    sinon.stub(element, 'fetch');
+    element.fetch.throws(() => Error('Something went wrong'));
+
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    // Fetch runs here.
+
+    await element.updateComplete;
+
+    assert.equal(element._error, 'Something went wrong');
+    assert.include(element.shadowRoot.textContent, 'Something went wrong');
+  });
+
+  it('renders fetched announcement', async () => {
+    sinon.stub(element, 'fetch');
+    element.fetch.returns(
+        {announcements: [{id: '1234', messageContent: 'test thing'}]});
+
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    // Fetch runs here.
+
+    await element.updateComplete;
+
+    assert.deepEqual(element._announcements,
+        [{id: '1234', messageContent: 'test thing'}]);
+    assert.include(element.shadowRoot.textContent, 'test thing');
+  });
+
+  it('renders empty on empty announcement', async () => {
+    sinon.stub(element, 'fetch');
+    element.fetch.returns({});
+    element.service = 'monorail';
+
+    await element.updateComplete;
+
+    // Fetch runs here.
+
+    await element.updateComplete;
+
+    assert.deepEqual(element._announcements, []);
+    assert.equal(0, element.shadowRoot.children.length);
+  });
+
+  it('fetch returns response data', async () => {
+    const json = {announcements: [{id: '1234', messageContent: 'test thing'}]};
+    const fakeResponse = XSSI_PREFIX + JSON.stringify(json);
+    window.fetch.returns(new window.Response(fakeResponse));
+
+    const resp = await element.fetch('monorail');
+
+    assert.deepEqual(resp, json);
+  });
+
+  it('fetch errors when no XSSI prefix', async () => {
+    const json = {announcements: [{id: '1234', messageContent: 'test thing'}]};
+    const fakeResponse = JSON.stringify(json);
+    window.fetch.returns(new window.Response(fakeResponse));
+
+    try {
+      await element.fetch('monorail');
+    } catch (e) {
+      assert.include(e.message, 'No XSSI prefix in announce response:');
+    }
+  });
+
+  it('fetch errors when response is not okay', async () => {
+    const json = {announcements: [{id: '1234', messageContent: 'test thing'}]};
+    const fakeResponse = XSSI_PREFIX + JSON.stringify(json);
+    window.fetch.returns(new window.Response(fakeResponse, {status: 500}));
+
+    try {
+      await element.fetch('monorail');
+    } catch (e) {
+      assert.include(e.message,
+          'Something went wrong while fetching announcements');
+    }
+  });
+});
diff --git a/static_src/elements/chops/chops-autocomplete/chops-autocomplete.js b/static_src/elements/chops/chops-autocomplete/chops-autocomplete.js
new file mode 100644
index 0000000..dab8f85
--- /dev/null
+++ b/static_src/elements/chops/chops-autocomplete/chops-autocomplete.js
@@ -0,0 +1,632 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+import {NON_EDITING_KEY_EVENTS} from 'shared/dom-helpers.js';
+
+/**
+ * @type {RegExp} Autocomplete options are matched at word boundaries. This
+ *   Regex specifies what counts as a boundary between words.
+ */
+const DELIMITER_REGEX = /[^a-z0-9]+/i;
+
+/**
+ * Specifies what happens to the input element an autocomplete
+ * instance is attached to when a user selects an autocomplete option. This
+ * constant specifies the default behavior where a form's entire value is
+ * replaced with the selected value.
+ * @param {HTMLInputElement} input An input element.
+ * @param {string} value The value of the selected autocomplete option.
+ */
+const DEFAULT_REPLACER = (input, value) => {
+  input.value = value;
+};
+
+/**
+ * @type {number} The default maximum of completions to render at a time.
+ */
+const DEFAULT_MAX_COMPLETIONS = 200;
+
+/**
+ * @type {number} Globally shared counter for autocomplete instances to help
+ *   ensure that no two <chops-autocomplete> options have the same ID.
+ */
+let idCount = 1;
+
+/**
+ * `<chops-autocomplete>` shared autocomplete UI code that inter-ops with
+ * other code.
+ *
+ * chops-autocomplete inter-ops with any input element, whether custom or
+ * native that can receive change handlers and has a 'value' property which
+ * can be read and set.
+ *
+ * NOTE: This element disables ShadowDOM for accessibility reasons: to allow
+ * aria attributes from the outside to reference features in this element.
+ *
+ * @customElement chops-autocomplete
+ */
+export class ChopsAutocomplete extends LitElement {
+  /** @override */
+  render() {
+    const completions = this.completions;
+    const currentValue = this._prefix.trim().toLowerCase();
+    const index = this._selectedIndex;
+    const currentCompletion = index >= 0 &&
+      index < completions.length ? completions[index] : '';
+
+    return html`
+      <style>
+        /*
+         * Really specific class names are necessary because ShadowDOM
+         * is disabled for this component.
+         */
+        .chops-autocomplete-container {
+          position: relative;
+        }
+        .chops-autocomplete-container table {
+          padding: 0;
+          font-size: var(--chops-main-font-size);
+          color: var(--chops-link-color);
+          position: absolute;
+          background: var(--chops-white);
+          border: var(--chops-accessible-border);
+          z-index: 999;
+          box-shadow: 2px 3px 8px 0px hsla(0, 0%, 0%, 0.3);
+          border-spacing: 0;
+          border-collapse: collapse;
+          /* In the case when the autocomplete extends the
+           * height of the viewport, we want to make sure
+           * there's spacing. */
+          margin-bottom: 1em;
+        }
+        .chops-autocomplete-container tbody {
+          display: block;
+          min-width: 100px;
+          max-height: 500px;
+          overflow: auto;
+        }
+        .chops-autocomplete-container tr {
+          cursor: pointer;
+          transition: background 0.2s ease-in-out;
+        }
+        .chops-autocomplete-container tr[data-selected] {
+          background: var(--chops-active-choice-bg);
+          text-decoration: underline;
+        }
+        .chops-autocomplete-container td {
+          padding: 0.25em 8px;
+          white-space: nowrap;
+        }
+        .screenreader-hidden {
+          clip: rect(1px, 1px, 1px, 1px);
+          height: 1px;
+          overflow: hidden;
+          position: absolute;
+          white-space: nowrap;
+          width: 1px;
+        }
+      </style>
+      <div class="chops-autocomplete-container">
+        <span class="screenreader-hidden" aria-live="polite">
+          ${currentCompletion}
+        </span>
+        <table
+          ?hidden=${!completions.length}
+        >
+          <tbody>
+            ${completions.map((completion, i) => html`
+              <tr
+                id=${completionId(this.id, i)}
+                ?data-selected=${i === index}
+                data-index=${i}
+                data-value=${completion}
+                @mouseover=${this._hoverCompletion}
+                @mousedown=${this._clickCompletion}
+                role="option"
+                aria-selected=${completion.toLowerCase() ===
+                  currentValue ? 'true' : 'false'}
+              >
+                <td class="completion">
+                  ${this._renderCompletion(completion)}
+                </td>
+                <td class="docstring">
+                  ${this._renderDocstring(completion)}
+                </td>
+              </tr>
+            `)}
+          </tbody>
+        </table>
+      </div>
+    `;
+  }
+
+  /**
+   * Renders a single autocomplete result.
+   * @param {string} completion The string for the currently selected
+   *   autocomplete value.
+   * @return {TemplateResult}
+   */
+  _renderCompletion(completion) {
+    const matchDict = this._matchDict;
+
+    if (!(completion in matchDict)) return completion;
+
+    const {index, matchesDoc} = matchDict[completion];
+
+    if (matchesDoc) return completion;
+
+    const prefix = this._prefix;
+    const start = completion.substr(0, index);
+    const middle = completion.substr(index, prefix.length);
+    const end = completion.substr(index + prefix.length);
+
+    return html`${start}<b>${middle}</b>${end}`;
+  }
+
+  /**
+   * Finds the docstring for a given autocomplete result and renders it.
+   * @param {string} completion The autocomplete result rendered.
+   * @return {TemplateResult}
+   */
+  _renderDocstring(completion) {
+    const matchDict = this._matchDict;
+    const docDict = this.docDict;
+
+    if (!completion in docDict) return '';
+
+    const doc = docDict[completion];
+
+    if (!(completion in matchDict)) return doc;
+
+    const {index, matchesDoc} = matchDict[completion];
+
+    if (!matchesDoc) return doc;
+
+    const prefix = this._prefix;
+    const start = doc.substr(0, index);
+    const middle = doc.substr(index, prefix.length);
+    const end = doc.substr(index + prefix.length);
+
+    return html`${start}<b>${middle}</b>${end}`;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * The input this element is for.
+       */
+      for: {type: String},
+      /**
+       * Generated id for the element.
+       */
+      id: {
+        type: String,
+        reflect: true,
+      },
+      /**
+       * The role attribute, set for accessibility.
+       */
+      role: {
+        type: String,
+        reflect: true,
+      },
+      /**
+       * Array of strings for possible autocompletion values.
+       */
+      strings: {type: Array},
+      /**
+       * A dictionary containing optional doc strings for each autocomplete
+       * string.
+       */
+      docDict: {type: Object},
+      /**
+       * An optional function to compute what happens when the user selects
+       * a value.
+       */
+      replacer: {type: Object},
+      /**
+       * An Array of the currently suggested autcomplte values.
+       */
+      completions: {type: Array},
+      /**
+       * Maximum number of completion values that can display at once.
+       */
+      max: {type: Number},
+      /**
+       * Dict of locations of matched substrings. Value format:
+       * {index, matchesDoc}.
+       */
+      _matchDict: {type: Object},
+      _selectedIndex: {type: Number},
+      _prefix: {type: String},
+      _forRef: {type: Object},
+      _boundToggleCompletionsOnFocus: {type: Object},
+      _boundNavigateCompletions: {type: Object},
+      _boundUpdateCompletions: {type: Object},
+      _oldAttributes: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.strings = [];
+    this.docDict = {};
+    this.completions = [];
+    this.max = DEFAULT_MAX_COMPLETIONS;
+
+    this.role = 'listbox';
+    this.id = `chops-autocomplete-${idCount++}`;
+
+    this._matchDict = {};
+    this._selectedIndex = -1;
+    this._prefix = '';
+    this._boundToggleCompletionsOnFocus =
+      this._toggleCompletionsOnFocus.bind(this);
+    this._boundUpdateCompletions = this._updateCompletions.bind(this);
+    this._boundNavigateCompletions = this._navigateCompletions.bind(this);
+    this._oldAttributes = {};
+  }
+
+  // Disable shadow DOM to allow aria attributes to propagate.
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    this._disconnectAutocomplete(this._forRef);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('for')) {
+      const forRef = this.getRootNode().querySelector('#' + this.for);
+
+      // TODO(zhangtiff): Make this element work with custom input components
+      // in the future as well.
+      this._forRef = (forRef.tagName || '').toUpperCase() === 'INPUT' ?
+        forRef : undefined;
+      this._connectAutocomplete(this._forRef);
+    }
+    if (this._forRef) {
+      if (changedProperties.has('id')) {
+        this._forRef.setAttribute('aria-owns', this.id);
+      }
+      if (changedProperties.has('completions')) {
+        // a11y. Tell screenreaders whether the autocomplete is expanded.
+        this._forRef.setAttribute('aria-expanded',
+          this.completions.length ? 'true' : 'false');
+      }
+
+      if (changedProperties.has('_selectedIndex') ||
+          changedProperties.has('completions')) {
+        this._updateAriaActiveDescendant(this._forRef);
+
+        this._scrollCompletionIntoView(this._selectedIndex);
+      }
+    }
+  }
+
+  /**
+   * Sets the aria-activedescendant attribute of the element (ie: an input form)
+   * that the autocomplete is attached to, in order to tell screenreaders about
+   * which autocomplete option is currently selected.
+   * @param {HTMLInputElement} element
+   */
+  _updateAriaActiveDescendant(element) {
+    const i = this._selectedIndex;
+
+    if (i >= 0 && i < this.completions.length) {
+      const selectedId = completionId(this.id, i);
+
+      // a11y. Set the ID of the currently selected element.
+      element.setAttribute('aria-activedescendant', selectedId);
+
+      // Scroll the container to make sure the selected element is in view.
+    } else {
+      element.setAttribute('aria-activedescendant', '');
+    }
+  }
+
+  /**
+   * When a user moves up or down from an autocomplete option that's at the top
+   * or bottom of the autocomplete option container, we must scroll the
+   * container to make sure the user always sees the option they've selected.
+   * @param {number} i The index of the autocomplete option to put into view.
+   */
+  _scrollCompletionIntoView(i) {
+    const selectedId = completionId(this.id, i);
+
+    const container = this.querySelector('tbody');
+    const completion = this.querySelector(`#${selectedId}`);
+
+    if (!completion) return;
+
+    const distanceFromTop = completion.offsetTop - container.scrollTop;
+
+    // If the completion is above the viewport for the container.
+    if (distanceFromTop < 0) {
+      // Position the completion at the top of the container.
+      container.scrollTop = completion.offsetTop;
+    }
+
+    // If the compltion is below the viewport for the container.
+    if (distanceFromTop > (container.offsetHeight - completion.offsetHeight)) {
+      // Position the compltion at the bottom of the container.
+      container.scrollTop = completion.offsetTop - (container.offsetHeight -
+        completion.offsetHeight);
+    }
+  }
+
+  /**
+   * Changes the input's value according to the rules of the replacer function.
+   * @param {string} value - the value to swap in.
+   * @return {undefined}
+   */
+  completeValue(value) {
+    if (!this._forRef) return;
+
+    const replacer = this.replacer || DEFAULT_REPLACER;
+    replacer(this._forRef, value);
+
+    this.hideCompletions();
+  }
+
+  /**
+   * Computes autocomplete values matching the current input in the field.
+   * @return {boolean} Whether any completions were found.
+   */
+  showCompletions() {
+    if (!this._forRef) {
+      this.hideCompletions();
+      return false;
+    }
+    this._prefix = this._forRef.value.trim().toLowerCase();
+    // Always select the first completion by default when recomputing
+    // completions.
+    this._selectedIndex = 0;
+
+    const matchDict = {};
+    const accepted = [];
+    matchDict;
+    for (let i = 0; i < this.strings.length &&
+        accepted.length < this.max; i++) {
+      const s = this.strings[i];
+      let matchIndex = this._matchIndex(this._prefix, s);
+      let matches = matchIndex >= 0;
+      if (matches) {
+        matchDict[s] = {index: matchIndex, matchesDoc: false};
+      } else if (s in this.docDict) {
+        matchIndex = this._matchIndex(this._prefix, this.docDict[s]);
+        matches = matchIndex >= 0;
+        if (matches) {
+          matchDict[s] = {index: matchIndex, matchesDoc: true};
+        }
+      }
+      if (matches) {
+        accepted.push(s);
+      }
+    }
+
+    this._matchDict = matchDict;
+
+    this.completions = accepted;
+
+    return !!this.completions.length;
+  }
+
+  /**
+   * Finds where a given user input matches an autocomplete option. Note that
+   * a match is only found if the substring is at either the beginning of the
+   * string or the beginning of a delimited section of the string. Hence, we
+   * refer to the "needle" in this function a "prefix".
+   * @param {string} prefix The value that the user inputed into the form.
+   * @param {string} s The autocomplete option that's being compared.
+   * @return {number} An integer for what index the substring is found in the
+   *   autocomplete option. Returns -1 if no match.
+   */
+  _matchIndex(prefix, s) {
+    const matchStart = s.toLowerCase().indexOf(prefix.toLocaleLowerCase());
+    if (matchStart === 0 ||
+        (matchStart > 0 && s[matchStart - 1].match(DELIMITER_REGEX))) {
+      return matchStart;
+    }
+    return -1;
+  }
+
+  /**
+   * Hides autocomplete options.
+   */
+  hideCompletions() {
+    this.completions = [];
+    this._prefix = '';
+    this._selectedIndex = -1;
+  }
+
+  /**
+   * Sets an autocomplete option that a user hovers over as the selected option.
+   * @param {MouseEvent} e
+   */
+  _hoverCompletion(e) {
+    const target = e.currentTarget;
+
+    if (!target.dataset || !target.dataset.index) return;
+
+    const index = Number.parseInt(target.dataset.index);
+    if (index >= 0 && index < this.completions.length) {
+      this._selectedIndex = index;
+    }
+  }
+
+  /**
+   * Sets the value of the form input that the user is editing to the
+   * autocomplete option that the user just clicked.
+   * @param {MouseEvent} e
+   */
+  _clickCompletion(e) {
+    e.preventDefault();
+    const target = e.currentTarget;
+    if (!target.dataset || !target.dataset.value) return;
+
+    this.completeValue(target.dataset.value);
+  }
+
+  /**
+   * Hides and shows the autocomplete completions when a user focuses and
+   * unfocuses a form.
+   * @param {FocusEvent} e
+   */
+  _toggleCompletionsOnFocus(e) {
+    const target = e.target;
+
+    // Check if the input is focused or not.
+    if (target.matches(':focus')) {
+      this.showCompletions();
+    } else {
+      this.hideCompletions();
+    }
+  }
+
+  /**
+   * Implements hotkeys to allow the user to navigate autocomplete options with
+   * their keyboard. ie: pressing up and down to select options or Esc to close
+   * the form.
+   * @param {KeyboardEvent} e
+   */
+  _navigateCompletions(e) {
+    const completions = this.completions;
+    if (!completions.length) return;
+
+    switch (e.key) {
+      // TODO(zhangtiff): Throttle or control keyboard navigation so the user
+      // can't navigate faster than they can can perceive.
+      case 'ArrowUp':
+        e.preventDefault();
+        this._navigateUp();
+        break;
+      case 'ArrowDown':
+        e.preventDefault();
+        this._navigateDown();
+        break;
+      case 'Enter':
+      // TODO(zhangtiff): Add Tab to this case as well once all issue detail
+      // inputs use chops-autocomplete.
+        e.preventDefault();
+        if (this._selectedIndex >= 0 &&
+            this._selectedIndex <= completions.length) {
+          this.completeValue(completions[this._selectedIndex]);
+        }
+        break;
+      case 'Escape':
+        e.preventDefault();
+        this.hideCompletions();
+        break;
+    }
+  }
+
+  /**
+   * Selects the completion option above the current one.
+   */
+  _navigateUp() {
+    const completions = this.completions;
+    this._selectedIndex -= 1;
+    if (this._selectedIndex < 0) {
+      this._selectedIndex = completions.length - 1;
+    }
+  }
+
+  /**
+   * Selects the completion option below the current one.
+   */
+  _navigateDown() {
+    const completions = this.completions;
+    this._selectedIndex += 1;
+    if (this._selectedIndex >= completions.length) {
+      this._selectedIndex = 0;
+    }
+  }
+
+  /**
+   * Recomputes autocomplete completions when the user types a new input.
+   * Ignores KeyboardEvents that don't change the input value of the form
+   * to prevent excess recomputations.
+   * @param {KeyboardEvent} e
+   */
+  _updateCompletions(e) {
+    if (NON_EDITING_KEY_EVENTS.has(e.key)) return;
+    this.showCompletions();
+  }
+
+  /**
+   * Initializes the input element that this autocomplete instance is
+   * attached to with aria attributes required for accessibility.
+   * @param {HTMLInputElement} node The input element that the autocomplete is
+   *   attached to.
+   */
+  _connectAutocomplete(node) {
+    if (!node) return;
+
+    node.addEventListener('keyup', this._boundUpdateCompletions);
+    node.addEventListener('keydown', this._boundNavigateCompletions);
+    node.addEventListener('focus', this._boundToggleCompletionsOnFocus);
+    node.addEventListener('blur', this._boundToggleCompletionsOnFocus);
+
+    this._oldAttributes = {
+      'aria-owns': node.getAttribute('aria-owns'),
+      'aria-autocomplete': node.getAttribute('aria-autocomplete'),
+      'aria-expanded': node.getAttribute('aria-expanded'),
+      'aria-haspopup': node.getAttribute('aria-haspopup'),
+      'aria-activedescendant': node.getAttribute('aria-activedescendant'),
+    };
+    node.setAttribute('aria-owns', this.id);
+    node.setAttribute('aria-autocomplete', 'both');
+    node.setAttribute('aria-expanded', 'false');
+    node.setAttribute('aria-haspopup', 'listbox');
+    node.setAttribute('aria-activedescendant', '');
+  }
+
+  /**
+   * When <chops-autocomplete> is disconnected or moved to a difference form,
+   * this function removes the side effects added by <chops-autocomplete> on the
+   * input element that <chops-autocomplete> is attached to.
+   * @param {HTMLInputElement} node The input element that the autocomplete is
+   *   attached to.
+   */
+  _disconnectAutocomplete(node) {
+    if (!node) return;
+
+    node.removeEventListener('keyup', this._boundUpdateCompletions);
+    node.removeEventListener('keydown', this._boundNavigateCompletions);
+    node.removeEventListener('focus', this._boundToggleCompletionsOnFocus);
+    node.removeEventListener('blur', this._boundToggleCompletionsOnFocus);
+
+    for (const key of Object.keys(this._oldAttributes)) {
+      node.setAttribute(key, this._oldAttributes[key]);
+    }
+    this._oldAttributes = {};
+  }
+}
+
+/**
+ * Generates a unique HTML ID for a given autocomplete option, for use by
+ * aria-activedescendant. Note that because the autocomplete element has
+ * ShadowDOM disabled, we need to make sure the ID is specific enough to be
+ * globally unique across the entire application.
+ * @param {string} prefix A unique prefix to differentiate this autocomplete
+ *   instance from other autocomplete instances.
+ * @param {number} i The index of the autocomplete option.
+ * @return {string} A unique HTML ID for a given autocomplete option.
+ */
+function completionId(prefix, i) {
+  return `${prefix}-option-${i}`;
+}
+
+customElements.define('chops-autocomplete', ChopsAutocomplete);
diff --git a/static_src/elements/chops/chops-autocomplete/chops-autocomplete.test.js b/static_src/elements/chops/chops-autocomplete/chops-autocomplete.test.js
new file mode 100644
index 0000000..e470312
--- /dev/null
+++ b/static_src/elements/chops/chops-autocomplete/chops-autocomplete.test.js
@@ -0,0 +1,358 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import sinon from 'sinon';
+import {assert} from 'chai';
+import {ChopsAutocomplete} from './chops-autocomplete.js';
+
+let element;
+let input;
+
+describe('chops-autocomplete', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-autocomplete');
+    document.body.appendChild(element);
+
+    input = document.createElement('input');
+    input.id = 'autocomplete-input';
+    document.body.appendChild(input);
+
+    element.for = 'autocomplete-input';
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    document.body.removeChild(input);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsAutocomplete);
+  });
+
+  it('registers child input', async () => {
+    await element.updateComplete;
+
+    assert.isNotNull(element._forRef);
+    assert.equal(element._forRef.tagName.toUpperCase(), 'INPUT');
+  });
+
+  it('completeValue sets input value', async () => {
+    await element.updateComplete;
+
+    element.completeValue('test');
+    assert.equal(input.value, 'test');
+
+    element.completeValue('again');
+    assert.equal(input.value, 'again');
+  });
+
+  it('completeValue can run a custom replacer', async () => {
+    element.replacer = (input, value) => input.value = value + ',';
+    await element.updateComplete;
+
+    element.completeValue('trailing');
+    assert.equal(input.value, 'trailing,');
+
+    element.completeValue('comma');
+    assert.equal(input.value, 'comma,');
+  });
+
+  it('completions render', async () => {
+    element.completions = ['hello', 'world'];
+    element.docDict = {'hello': 'well hello there'};
+    await element.updateComplete;
+
+    const completions = element.querySelectorAll('.completion');
+    const docstrings = element.querySelectorAll('.docstring');
+
+    assert.equal(completions.length, 2);
+    assert.equal(docstrings.length, 2);
+
+    assert.include(completions[0].textContent, 'hello');
+    assert.include(completions[1].textContent, 'world');
+
+    assert.include(docstrings[0].textContent, 'well hello there');
+    assert.include(docstrings[1].textContent, '');
+  });
+
+  it('completions bold matched section when rendering', async () => {
+    element.completions = ['hello-world'];
+    element._prefix = 'wor';
+    element._matchDict = {
+      'hello-world': {'index': 6},
+    };
+
+    await element.updateComplete;
+
+    const completion = element.querySelector('.completion');
+
+    assert.include(completion.textContent, 'hello-world');
+
+    assert.equal(completion.querySelector('b').textContent.trim(), 'wor');
+  });
+
+
+  it('showCompletions populates completions with matches', async () => {
+    element.strings = [
+      'test-one',
+      'test-two',
+      'ignore',
+      'hello',
+      'woah-test',
+      'i-am-a-tester',
+    ];
+    input.value = 'test';
+    await element.updateComplete;
+
+    element.showCompletions();
+
+    assert.deepEqual(element.completions, [
+      'test-one',
+      'test-two',
+      'woah-test',
+      'i-am-a-tester',
+    ]);
+  });
+
+  it('showCompletions matches docs', async () => {
+    element.strings = [
+      'hello',
+      'world',
+      'no-op',
+    ];
+    element.docDict = {'world': 'this is a test'};
+    input.value = 'test';
+    await element.updateComplete;
+
+    element.showCompletions();
+
+    assert.deepEqual(element.completions, [
+      'world',
+    ]);
+  });
+
+  it('showCompletions caps completions at max', async () => {
+    element.max = 2;
+    element.strings = [
+      'test-one',
+      'test-two',
+      'ignore',
+      'hello',
+      'woah-test',
+      'i-am-a-tester',
+    ];
+    input.value = 'test';
+    await element.updateComplete;
+
+    element.showCompletions();
+
+    assert.deepEqual(element.completions, [
+      'test-one',
+      'test-two',
+    ]);
+  });
+
+  it('hideCompletions hides completions', async () => {
+    element.completions = [
+      'test-one',
+      'test-two',
+    ];
+
+    await element.updateComplete;
+
+    const completionTable = element.querySelector('table');
+    assert.isFalse(completionTable.hidden);
+
+    element.hideCompletions();
+
+    await element.updateComplete;
+
+    assert.isTrue(completionTable.hidden);
+  });
+
+  it('clicking completion completes it', async () => {
+    element.completions = [
+      'test-one',
+      'test-two',
+      'click me!',
+      'test',
+    ];
+
+    await element.updateComplete;
+
+    const completions = element.querySelectorAll('tr');
+
+    assert.equal(input.value, '');
+
+    // Note: the click() event can only trigger click events, not mousedown
+    // events, so we are instead manually running the event handler.
+    element._clickCompletion({
+      preventDefault: sinon.stub(),
+      currentTarget: completions[2],
+    });
+
+    assert.equal(input.value, 'click me!');
+  });
+
+  it('completion is scrolled into view when outside viewport', async () => {
+    element.completions = [
+      'i',
+      'am',
+      'an option',
+    ];
+    element._selectedIndex = 0;
+    element.id = 'chops-autocomplete-1';
+
+    await element.updateComplete;
+
+    const container = element.querySelector('tbody');
+    const completion = container.querySelector('tr');
+    const completionHeight = completion.offsetHeight;
+    // Make the table one row tall.
+    container.style.height = `${completionHeight}px`;
+
+    element._selectedIndex = 1;
+    await element.updateComplete;
+
+    assert.equal(container.scrollTop, completionHeight);
+
+    element._selectedIndex = 2;
+    await element.updateComplete;
+
+    assert.equal(container.scrollTop, completionHeight * 2);
+
+    element._selectedIndex = 0;
+    await element.updateComplete;
+
+    assert.equal(container.scrollTop, 0);
+  });
+
+  it('aria-activedescendant set based on selected option', async () => {
+    element.completions = [
+      'i',
+      'am',
+      'an option',
+    ];
+    element._selectedIndex = 1;
+    element.id = 'chops-autocomplete-1';
+
+    await element.updateComplete;
+
+    assert.equal(input.getAttribute('aria-activedescendant'),
+        'chops-autocomplete-1-option-1');
+  });
+
+  it('hovering over a completion selects it', async () => {
+    element.completions = [
+      'hover',
+      'over',
+      'me',
+    ];
+
+    await element.updateComplete;
+
+    const completions = element.querySelectorAll('tr');
+
+    element._hoverCompletion({
+      currentTarget: completions[2],
+    });
+
+    assert.equal(element._selectedIndex, 2);
+
+    element._hoverCompletion({
+      currentTarget: completions[1],
+    });
+
+    assert.equal(element._selectedIndex, 1);
+  });
+
+  it('ArrowDown moves through completions', async () => {
+    element.completions = [
+      'move',
+      'down',
+      'me',
+    ];
+
+    element._selectedIndex = 0;
+
+    await element.updateComplete;
+
+    const preventDefault = sinon.stub();
+
+    element._navigateCompletions({preventDefault, key: 'ArrowDown'});
+    assert.equal(element._selectedIndex, 1);
+
+    element._navigateCompletions({preventDefault, key: 'ArrowDown'});
+    assert.equal(element._selectedIndex, 2);
+
+    // Wrap around.
+    element._navigateCompletions({preventDefault, key: 'ArrowDown'});
+    assert.equal(element._selectedIndex, 0);
+
+    sinon.assert.callCount(preventDefault, 3);
+  });
+
+  it('ArrowUp moves through completions', async () => {
+    element.completions = [
+      'move',
+      'up',
+      'me',
+    ];
+
+    element._selectedIndex = 0;
+
+    await element.updateComplete;
+
+    const preventDefault = sinon.stub();
+
+    // Wrap around.
+    element._navigateCompletions({preventDefault, key: 'ArrowUp'});
+    assert.equal(element._selectedIndex, 2);
+
+    element._navigateCompletions({preventDefault, key: 'ArrowUp'});
+    assert.equal(element._selectedIndex, 1);
+
+    element._navigateCompletions({preventDefault, key: 'ArrowUp'});
+    assert.equal(element._selectedIndex, 0);
+
+    sinon.assert.callCount(preventDefault, 3);
+  });
+
+  it('Enter completes with selected completion', async () => {
+    element.completions = [
+      'hello',
+      'pick me',
+      'world',
+    ];
+
+    element._selectedIndex = 1;
+
+    await element.updateComplete;
+
+    const preventDefault = sinon.stub();
+
+    element._navigateCompletions({preventDefault, key: 'Enter'});
+
+    assert.equal(input.value, 'pick me');
+    sinon.assert.callCount(preventDefault, 1);
+  });
+
+  it('Escape hides completions', async () => {
+    element.completions = [
+      'hide',
+      'me',
+    ];
+
+    await element.updateComplete;
+
+    const preventDefault = sinon.stub();
+    element._navigateCompletions({preventDefault, key: 'Escape'});
+
+    sinon.assert.callCount(preventDefault, 1);
+
+    await element.updateComplete;
+
+    assert.equal(element.completions.length, 0);
+  });
+});
diff --git a/static_src/elements/chops/chops-button/chops-button.js b/static_src/elements/chops/chops-button/chops-button.js
new file mode 100644
index 0000000..2139e22
--- /dev/null
+++ b/static_src/elements/chops/chops-button/chops-button.js
@@ -0,0 +1,112 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-button>` displays a styled button component with a few niceties.
+ *
+ * @customElement chops-button
+ * @demo /demo/chops-button_demo.html
+ */
+export class ChopsButton extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        --chops-button-padding: 0.5em 16px;
+        background: hsla(0, 0%, 95%, 1);
+        margin: 0.25em 4px;
+        cursor: pointer;
+        border-radius: 3px;
+        text-align: center;
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        user-select: none;
+        transition: filter 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
+        font-family: var(--chops-font-family);
+      }
+      :host([hidden]) {
+        display: none;
+      }
+      :host([raised]) {
+        box-shadow: 0px 2px 8px -1px hsla(0, 0%, 0%, 0.5);
+      }
+      :host(:hover) {
+        filter: brightness(95%);
+      }
+      :host(:active) {
+        filter: brightness(115%);
+      }
+      :host([raised]:active) {
+        box-shadow: 0px 1px 8px -1px hsla(0, 0%, 0%, 0.5);
+      }
+      :host([disabled]),
+      :host([disabled]:hover) {
+        filter: grayscale(30%);
+        opacity: 0.4;
+        background: hsla(0, 0%, 87%, 1);
+        cursor: default;
+        pointer-events: none;
+        box-shadow: none;
+      }
+      button {
+        background: none;
+        width: 100%;
+        height: 100%;
+        border: 0;
+        padding: var(--chops-button-padding);
+        margin: 0;
+        color: inherit;
+        cursor: inherit;
+        text-align: center;
+        font-family: inherit;
+        text-align: inherit;
+        font-weight: inherit;
+        font-size: inherit;
+        line-height: inherit;
+        border-radius: inherit;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <button ?disabled=${this.disabled}>
+        <slot></slot>
+      </button>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /** Whether the button is available for input or not. */
+      disabled: {
+        type: Boolean,
+        reflect: true,
+      },
+      /** Whether the button should have a shadow or not. */
+      raised: {
+        type: Boolean,
+        value: false,
+        reflect: true,
+      },
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.disabled = false;
+    this.raised = false;
+  }
+}
+customElements.define('chops-button', ChopsButton);
diff --git a/static_src/elements/chops/chops-button/chops-button.test.js b/static_src/elements/chops/chops-button/chops-button.test.js
new file mode 100644
index 0000000..4487564
--- /dev/null
+++ b/static_src/elements/chops/chops-button/chops-button.test.js
@@ -0,0 +1,45 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {ChopsButton} from './chops-button.js';
+import {auditA11y} from 'shared/test/helpers';
+
+let element;
+
+describe('chops-button', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-button');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsButton);
+  });
+
+  it('initial a11y', async () => {
+    const text = document.createTextNode('button text');
+    element.appendChild(text);
+    await auditA11y(element);
+  });
+
+  it('chops-button can be disabled', async () => {
+    await element.updateComplete;
+
+    const innerButton = element.shadowRoot.querySelector('button');
+
+    assert.isFalse(element.hasAttribute('disabled'));
+    assert.isFalse(innerButton.hasAttribute('disabled'));
+
+    element.disabled = true;
+    await element.updateComplete;
+
+    assert.isTrue(element.hasAttribute('disabled'));
+    assert.isTrue(innerButton.hasAttribute('disabled'));
+  });
+});
diff --git a/static_src/elements/chops/chops-checkbox/chops-checkbox.js b/static_src/elements/chops/chops-checkbox/chops-checkbox.js
new file mode 100644
index 0000000..d752347
--- /dev/null
+++ b/static_src/elements/chops/chops-checkbox/chops-checkbox.js
@@ -0,0 +1,135 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-checkbox>`
+ *
+ * A checkbox component. This component is primarily a wrapper
+ * around a native checkbox to allow easy sharing of styles.
+ *
+ */
+export class ChopsCheckbox extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        --chops-checkbox-color: var(--chops-primary-accent-color);
+        /* A bit brighter than Chrome's default focus color to
+        * avoid blending into the checkbox's blue. */
+        --chops-checkbox-focus-color: hsl(193, 82%, 63%);
+        --chops-checkbox-size: 16px;
+        --chops-checkbox-check-size: 18px;
+      }
+      label {
+        cursor: pointer;
+        display: inline-flex;
+        align-items: center;
+      }
+      input[type="checkbox"] {
+        /* We need the checkbox to be hidden but still accessible. */
+        opacity: 0;
+        width: 0;
+        height: 0;
+        position: absolute;
+        top: -9999;
+        left: -9999;
+      }
+      label::before {
+        width: var(--chops-checkbox-size);
+        height: var(--chops-checkbox-size);
+        margin-right: 8px;
+        box-sizing: border-box;
+        content: "\\2713";
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        border: 2px solid #222;
+        border-radius: 2px;
+        background: #fff;
+        font-size: var(--chops-checkbox-check-size);
+        padding: 0;
+        color: transparent;
+      }
+      input[type="checkbox"]:focus + label::before {
+        /* Make sure an outline shows around this element for
+        * accessibility.
+        */
+        box-shadow: 0 0 5px 1px var(--chops-checkbox-focus-color);
+      }
+      input[type="checkbox"]:checked + label::before {
+        background: var(--chops-checkbox-color);
+        border-color: var(--chops-checkbox-color);
+        color: #fff;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <!-- Note: Avoiding 2-way data binding to futureproof this code
+        for LitElement. -->
+      <input id="checkbox" type="checkbox"
+        .checked=${this.checked} @change=${this._checkedChangeHandler}>
+      <label for="checkbox">
+        <slot></slot>
+      </label>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      label: {type: String},
+
+      /**
+       * Note: At the moment, this component does not manage its own
+       * internal checked state. It expects its checked state to come
+       * from its parent, and its parent is expected to update the
+       * chops-checkbox's checked state on a change event.
+       *
+       * This can be generalized in the future to support multiple
+       * ways of managing checked state if needed.
+       **/
+      checked: {type: Boolean},
+    };
+  }
+
+  /**
+   * Clicks the checkbox. Helpful for automated testing.
+   */
+  click() {
+    super.click();
+    /** @type {HTMLInputElement} */ (
+      this.shadowRoot.querySelector('#checkbox')).click();
+  }
+
+  /**
+   * Listens to the native checkbox's change event and runs internal
+   * logic based on changes.
+   * @param {Event} evt
+   * @private
+   */
+  _checkedChangeHandler(evt) {
+    this._checkedChange(evt.target.checked);
+  }
+
+  /**
+   * @param {boolean} checked Whether the box was checked or unchecked.
+   * @fires CustomEvent#checked-change
+   * @private
+   */
+  _checkedChange(checked) {
+    if (checked === this.checked) return;
+    const customEvent = new CustomEvent('checked-change', {
+      detail: {
+        checked: checked,
+      },
+    });
+    this.dispatchEvent(customEvent);
+  }
+}
+customElements.define('chops-checkbox', ChopsCheckbox);
diff --git a/static_src/elements/chops/chops-checkbox/chops-checkbox.test.js b/static_src/elements/chops/chops-checkbox/chops-checkbox.test.js
new file mode 100644
index 0000000..5a11111
--- /dev/null
+++ b/static_src/elements/chops/chops-checkbox/chops-checkbox.test.js
@@ -0,0 +1,86 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsCheckbox} from './chops-checkbox.js';
+
+let element;
+
+describe('chops-checkbox', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-checkbox');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsCheckbox);
+  });
+
+  it('clicking checkbox dispatches checked-change event', async () => {
+    element.checked = false;
+    sinon.stub(window, 'CustomEvent');
+    sinon.stub(element, 'dispatchEvent');
+
+    await element.updateComplete;
+
+    element.shadowRoot.querySelector('#checkbox').click();
+
+    assert.deepEqual(window.CustomEvent.args[0][0], 'checked-change');
+    assert.deepEqual(window.CustomEvent.args[0][1], {
+      detail: {checked: true},
+    });
+
+    assert.isTrue(window.CustomEvent.calledOnce);
+    assert.isTrue(element.dispatchEvent.calledOnce);
+
+    window.CustomEvent.restore();
+    element.dispatchEvent.restore();
+  });
+
+  it('updating checked property updates native <input>', async () => {
+    element.checked = false;
+
+    await element.updateComplete;
+
+    assert.isFalse(element.checked);
+    assert.isFalse(element.shadowRoot.querySelector('input').checked);
+
+    element.checked = true;
+
+    await element.updateComplete;
+
+    assert.isTrue(element.checked);
+    assert.isTrue(element.shadowRoot.querySelector('input').checked);
+  });
+
+  it('updating checked attribute updates native <input>', async () => {
+    element.setAttribute('checked', true);
+    await element.updateComplete;
+
+    assert.equal(element.getAttribute('checked'), 'true');
+    assert.isTrue(element.shadowRoot.querySelector('input').checked);
+
+    element.click();
+    await element.updateComplete;
+
+    // We expect the 'checked' attribute to remain the same even as the
+    // corresponding property changes when the user clicks the checkbox.
+    assert.equal(element.getAttribute('checked'), 'true');
+    assert.isFalse(element.shadowRoot.querySelector('input').checked);
+
+    element.click();
+    await element.updateComplete;
+    assert.isTrue(element.shadowRoot.querySelector('input').checked);
+
+    element.removeAttribute('checked');
+    await element.updateComplete;
+    assert.isNotTrue(element.getAttribute('checked'));
+    assert.isFalse(element.shadowRoot.querySelector('input').checked);
+  });
+});
diff --git a/static_src/elements/chops/chops-chip/chops-chip.js b/static_src/elements/chops/chops-chip/chops-chip.js
new file mode 100644
index 0000000..ce8319e
--- /dev/null
+++ b/static_src/elements/chops/chops-chip/chops-chip.js
@@ -0,0 +1,122 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-chip>` displays a chip.
+ * "Chips are compact elements that represent an input, attribute, or action."
+ * https://material.io/components/chips/
+ */
+export class ChopsChip extends LitElement {
+  /** @override */
+  static get properties() {
+    return {
+      focusable: {type: Boolean, reflect: true},
+      thumbnail: {type: String},
+      buttonIcon: {type: String},
+      buttonLabel: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /** @type {boolean} */
+    this.focusable = false;
+
+    /** @type {string} */
+    this.thumbnail = '';
+
+    /** @type {string} */
+    this.buttonIcon = '';
+    /** @type {string} */
+    this.buttonLabel = '';
+  }
+
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        --chops-chip-bg-color: var(--chops-blue-gray-50);
+        display: inline-flex;
+        padding: 0px 10px;
+        line-height: 22px;
+        margin: 0 2px;
+        border-radius: 12px;
+        background: var(--chops-chip-bg-color);
+        align-items: center;
+        font-size: var(--chops-main-font-size);
+        box-sizing: border-box;
+        border: 1px solid var(--chops-chip-bg-color);
+      }
+      :host(:focus), :host(.selected) {
+        background: var(--chops-active-choice-bg);
+        border: 1px solid var(--chops-light-accent-color);
+      }
+      :host([hidden]) {
+        display: none;
+      }
+      i.left {
+        margin: 0 4px 0 -6px;
+      }
+      button {
+        border-radius: 50%;
+        cursor: pointer;
+        background: none;
+        border: 0;
+        padding: 0;
+        margin: 0 -6px 0 4px;
+        display: inline-flex;
+        align-items: center;
+        transition: background-color 0.2s ease-in-out;
+      }
+      button[hidden] {
+        display: none;
+      }
+      button:hover {
+        background: var(--chops-gray-300);
+      }
+      i.material-icons {
+        color: var(--chops-primary-icon-color);
+        font-size: 14px;
+        user-select: none;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      ${this.thumbnail ? html`
+        <i class="material-icons left">${this.thumbnail}</i>
+      ` : ''}
+      <slot></slot>
+      ${this.buttonIcon ? html`
+        <button @click=${this.clickButton} aria-label=${this.buttonLabel}>
+          <i class="material-icons" aria-hidden="true"}>${this.buttonIcon}</i>
+        </button>
+      `: ''}
+    `;
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('focusable')) {
+      this.tabIndex = this.focusable ? '0' : undefined;
+    }
+    super.update(changedProperties);
+  }
+
+  /**
+   * @param {MouseEvent} e A click event.
+   * @fires CustomEvent#click-button
+   */
+  clickButton(e) {
+    this.dispatchEvent(new CustomEvent('click-button'));
+  }
+}
+customElements.define('chops-chip', ChopsChip);
diff --git a/static_src/elements/chops/chops-chip/chops-chip.test.js b/static_src/elements/chops/chops-chip/chops-chip.test.js
new file mode 100644
index 0000000..843000b
--- /dev/null
+++ b/static_src/elements/chops/chops-chip/chops-chip.test.js
@@ -0,0 +1,52 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsChip} from './chops-chip.js';
+
+let element;
+
+describe('chops-chip', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-chip');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsChip);
+  });
+
+  it('icon is visible when defined', async () => {
+    await element.updateComplete;
+    assert.isNull(element.shadowRoot.querySelector('button'));
+
+    element.buttonIcon = 'close';
+
+    await element.updateComplete;
+
+    assert.isNotNull(element.shadowRoot.querySelector('button'));
+  });
+
+  it('clicking icon fires event', async () => {
+    const onClickStub = sinon.stub();
+
+    element.buttonIcon = 'close';
+
+    await element.updateComplete;
+
+    element.addEventListener('click-button', onClickStub);
+
+    assert.isFalse(onClickStub.calledOnce);
+
+    const icon = element.shadowRoot.querySelector('button');
+    icon.click();
+
+    assert.isTrue(onClickStub.calledOnce);
+  });
+});
diff --git a/static_src/elements/chops/chops-choice-buttons/chops-choice-buttons.js b/static_src/elements/chops/chops-choice-buttons/chops-choice-buttons.js
new file mode 100644
index 0000000..e300588
--- /dev/null
+++ b/static_src/elements/chops/chops-choice-buttons/chops-choice-buttons.js
@@ -0,0 +1,133 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import 'elements/chops/chops-button/chops-button.js';
+
+/**
+ * @typedef {Object} ChoiceOption
+ * @property {string=} value a unique string identifier for this option.
+ * @property {string=} text the text displayed to the user for this option.
+ * @property {string=} url the url this option navigates to.
+ */
+
+/**
+ * Shared component for rendering a set of choice chips.
+ * @extends {LitElement}
+ */
+export class ChopsChoiceButtons extends LitElement {
+  /** @override */
+  render() {
+    return html`
+      ${(this.options).map((option) => this._renderOption(option))}
+    `;
+  }
+
+  /**
+   * Rendering helper for rendering a single option.
+   * @param {ChoiceOption} option
+   * @return {TemplateResult}
+   */
+  _renderOption(option) {
+    const isSelected = this.value === option.value;
+    if (option.url) {
+      return html`
+        <a
+          ?selected=${isSelected}
+          aria-current=${isSelected ? 'true' : 'false'}
+          href=${option.url}
+        >${option.text}</a>
+      `;
+    }
+    return html`
+      <button
+        ?selected=${isSelected}
+        aria-current=${isSelected ? 'true' : 'false'}
+        @click=${this._setValue}
+        value=${option.value}
+      >${option.text}</button>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Array of options where each option is an Object with keys:
+       * {value, text, url}
+       */
+      options: {type: Array},
+      /**
+       * Which button is currently selected.
+       */
+      value: {type: String},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+
+    /**
+     * @type {Array<ChoiceOption>}
+     */
+    this.options = [];
+    this.value = '';
+  };
+
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: grid;
+        grid-auto-flow: column;
+        grid-template-columns: auto;
+      }
+      button, a {
+        display: block;
+        cursor: pointer;
+        border: 0;
+        color: var(--chops-gray-700);
+        font-weight: var(--chops-link-font-weight);
+        font-size: var(--chops-normal-font-size);
+        margin: 0.1em 4px;
+        padding: 4px 10px;
+        line-height: 1.4;
+        background: var(--chops-choice-bg);
+        text-decoration: none;
+        border-radius: 16px;
+      }
+      button[selected], a[selected] {
+        background: var(--chops-active-choice-bg);
+        color: var(--chops-link-color);
+        font-weight: var(--chops-link-font-weight);
+        border-radius: 16px;
+      }
+    `;
+  };
+
+  /**
+   * Public method for allowing parents to change the value of this component.
+   * @param {string} newValue
+   * @fires CustomEvent#change
+   */
+  setValue(newValue) {
+    if (newValue !== this.value) {
+      this.value = newValue;
+      this.dispatchEvent(new CustomEvent('change'));
+    }
+  }
+
+  /**
+   * Private setter for updating the value of the component based on an internal
+   * click event.
+   * @param {MouseEvent} e
+   * @private
+   */
+  _setValue(e) {
+    this.setValue(e.target.getAttribute('value'));
+  }
+};
+
+customElements.define('chops-choice-buttons', ChopsChoiceButtons);
diff --git a/static_src/elements/chops/chops-choice-buttons/chops-choice-buttons.test.js b/static_src/elements/chops/chops-choice-buttons/chops-choice-buttons.test.js
new file mode 100644
index 0000000..e529735
--- /dev/null
+++ b/static_src/elements/chops/chops-choice-buttons/chops-choice-buttons.test.js
@@ -0,0 +1,99 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsChoiceButtons} from './chops-choice-buttons';
+
+let element;
+
+describe('chops-choice-buttons', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-choice-buttons');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsChoiceButtons);
+  });
+
+  it('clicking option fires change event', async () => {
+    element.options = [{value: 'test', text: 'click me'}];
+    element.value = '';
+
+    await element.updateComplete;
+
+    const changeStub = sinon.stub();
+    element.addEventListener('change', changeStub);
+
+    const option = element.shadowRoot.querySelector('button');
+    option.click();
+
+    sinon.assert.calledOnce(changeStub);
+  });
+
+  it('clicking selected value does not fire change event', async () => {
+    element.options = [{value: 'test', text: 'click me'}];
+    element.value = 'test';
+
+    await element.updateComplete;
+
+    const changeStub = sinon.stub();
+    element.addEventListener('change', changeStub);
+
+    const option = element.shadowRoot.querySelector('button');
+    option.click();
+
+    sinon.assert.notCalled(changeStub);
+  });
+
+  it('selected value highlighted and has aria-current="true"', async () => {
+    element.options = [
+      {value: 'test', text: 'test'},
+      {value: 'selected', text: 'highlighted!'},
+    ];
+    element.value = 'selected';
+
+    await element.updateComplete;
+
+    const options = element.shadowRoot.querySelectorAll('button');
+
+    assert.isFalse(options[0].hasAttribute('selected'));
+    assert.isTrue(options[1].hasAttribute('selected'));
+
+    assert.equal(options[0].getAttribute('aria-current'), 'false');
+    assert.equal(options[1].getAttribute('aria-current'), 'true');
+  });
+
+  it('renders <a> tags when url set', async () => {
+    element.options = [
+      {value: 'test', text: 'test', url: 'http://google.com/'},
+    ];
+
+    await element.updateComplete;
+
+    const options = element.shadowRoot.querySelectorAll('a');
+
+    assert.equal(options[0].textContent.trim(), 'test');
+    assert.equal(options[0].href, 'http://google.com/');
+  });
+
+  it('selected value highlighted for <a> tags', async () => {
+    element.options = [
+      {value: 'test', text: 'test', url: 'http://google.com/'},
+      {value: 'selected', text: 'highlighted!', url: 'http://localhost/'},
+    ];
+    element.value = 'selected';
+
+    await element.updateComplete;
+
+    const options = element.shadowRoot.querySelectorAll('a');
+
+    assert.isFalse(options[0].hasAttribute('selected'));
+    assert.isTrue(options[1].hasAttribute('selected'));
+  });
+});
diff --git a/static_src/elements/chops/chops-collapse/chops-collapse.js b/static_src/elements/chops/chops-collapse/chops-collapse.js
new file mode 100644
index 0000000..0df3e21
--- /dev/null
+++ b/static_src/elements/chops/chops-collapse/chops-collapse.js
@@ -0,0 +1,62 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-collapse>` displays a collapsible element.
+ *
+ */
+export class ChopsCollapse extends LitElement {
+  /** @override */
+  static get properties() {
+    return {
+      opened: {
+        type: Boolean,
+        reflect: true,
+      },
+      ariaHidden: {
+        attribute: 'aria-hidden',
+        type: Boolean,
+        reflect: true,
+      },
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return css`
+      :host, :host([hidden]) {
+        display: none;
+      }
+      :host([opened]) {
+        display: block;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <slot></slot>
+    `;
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.opened = false;
+    this.ariaHidden = true;
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('opened')) {
+      this.ariaHidden = !this.opened;
+    }
+    super.update(changedProperties);
+  }
+}
+customElements.define('chops-collapse', ChopsCollapse);
diff --git a/static_src/elements/chops/chops-collapse/chops-collapse.test.js b/static_src/elements/chops/chops-collapse/chops-collapse.test.js
new file mode 100644
index 0000000..7058b65
--- /dev/null
+++ b/static_src/elements/chops/chops-collapse/chops-collapse.test.js
@@ -0,0 +1,33 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {ChopsCollapse} from './chops-collapse.js';
+
+
+let element;
+describe('chops-collapse', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-collapse');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsCollapse);
+  });
+
+  it('toggling chops-collapse changes aria-hidden', () => {
+    element.opened = true;
+
+    assert.isNull(element.getAttribute('aria-hidden'));
+
+    element.opened = false;
+
+    assert.isDefined(element.getAttribute('aria-hidden'));
+  });
+});
diff --git a/static_src/elements/chops/chops-dialog/chops-dialog.js b/static_src/elements/chops/chops-dialog/chops-dialog.js
new file mode 100644
index 0000000..0d40aa2
--- /dev/null
+++ b/static_src/elements/chops/chops-dialog/chops-dialog.js
@@ -0,0 +1,254 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-dialog>` displays a modal/dialog overlay.
+ *
+ * @customElement
+ */
+export class ChopsDialog extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        position: fixed;
+        z-index: 9999;
+        left: 0;
+        top: 0;
+        width: 100%;
+        height: 100%;
+        overflow: auto;
+        background-color: rgba(0,0,0,0.4);
+        display: flex;
+        align-items: center;
+        justify-content: center;
+      }
+      :host(:not([opened])), [hidden] {
+        display: none;
+        visibility: hidden;
+      }
+      :host([closeOnOutsideClick]),
+      :host([closeOnOutsideClick]) .dialog::backdrop {
+        /* TODO(zhangtiff): Deprecate custom backdrop in favor of native
+        * browser backdrop.
+        */
+        cursor: pointer;
+      }
+      .dialog {
+        background: none;
+        border: 0;
+        max-width: 90%;
+      }
+      .dialog-content {
+        /* This extra div is here because otherwise the browser can't
+        * differentiate between a click event that hits the dialog element or
+        * its backdrop pseudoelement.
+        */
+        box-sizing: border-box;
+        background: var(--chops-white);
+        padding: 1em 16px;
+        cursor: default;
+        box-shadow: 0px 3px 20px 0px hsla(0, 0%, 0%, 0.4);
+        width: var(--chops-dialog-width);
+        max-width: var(--chops-dialog-max-width, 100%);
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <dialog class="dialog" role="dialog" @cancel=${this._cancelHandler}>
+        <div class="dialog-content">
+          <slot></slot>
+        </div>
+      </dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Whether the dialog should currently be displayed or not.
+       */
+      opened: {
+        type: Boolean,
+        reflect: true,
+      },
+      /**
+       * A boolean that determines whether clicking outside of the dialog
+       * window should close it.
+       */
+      closeOnOutsideClick: {
+        type: Boolean,
+      },
+      /**
+       * A function fired when the element tries to change its own opened
+       * state. This is useful if you want the dialog state managed outside
+       * of the dialog instead of with internal state. (ie: with Redux)
+       */
+      onOpenedChange: {
+        type: Object,
+      },
+      /**
+       * When True, disables exiting keys and closing on outside clicks.
+       * Forces the user to interact with the dialog rather than just dismissing
+       * it.
+       */
+      forced: {
+        type: Boolean,
+      },
+      _boundKeydownHandler: {
+        type: Object,
+      },
+      _previousFocusedElement: {
+        type: Object,
+      },
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.opened = false;
+    this.closeOnOutsideClick = false;
+    this.forced = false;
+    this._boundKeydownHandler = this._keydownHandler.bind(this);
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    this.addEventListener('click', (evt) => {
+      if (!this.opened || !this.closeOnOutsideClick || this.forced) return;
+
+      const hasDialog = evt.composedPath().find(
+          (node) => {
+            return node.classList && node.classList.contains('dialog-content');
+          }
+      );
+      if (hasDialog) return;
+
+      this.close();
+    });
+
+    window.addEventListener('keydown', this._boundKeydownHandler, true);
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+    window.removeEventListener('keydown', this._boundKeydownHandler,
+        true);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('opened')) {
+      this._openedChanged(this.opened);
+    }
+  }
+
+  _keydownHandler(event) {
+    if (!this.opened) return;
+    if (event.key === 'Escape' && this.forced) {
+      // Stop users from using the Escape key in a forced dialog.
+      e.preventDefault();
+    }
+  }
+
+  /**
+   * Closes the dialog.
+   * May have its logic overridden by a custom onOpenChanged function.
+   */
+  close() {
+    if (this.onOpenedChange) {
+      this.onOpenedChange(false);
+    } else {
+      this.opened = false;
+    }
+  }
+
+  /**
+   * Opens the dialog.
+   * May have its logic overridden by a custom onOpenChanged function.
+   */
+  open() {
+    if (this.onOpenedChange) {
+      this.onOpenedChange(true);
+    } else {
+      this.opened = true;
+    }
+  }
+
+  /**
+   * Switches the dialog from open to closed or vice versa.
+   */
+  toggle() {
+    this.opened = !this.opened;
+  }
+
+  _cancelHandler(evt) {
+    if (!this.forced) {
+      this.close();
+    } else {
+      evt.preventDefault();
+    }
+  }
+
+  _getActiveElement() {
+    // document.activeElement alone isn't sufficient to find the active
+    // element within shadow dom.
+    let active = document.activeElement || document.body;
+    let activeRoot = active.shadowRoot || active.root;
+    while (activeRoot && activeRoot.activeElement) {
+      active = activeRoot.activeElement;
+      activeRoot = active.shadowRoot || active.root;
+    }
+    return active;
+  }
+
+  _openedChanged(opened) {
+    const dialog = this.shadowRoot.querySelector('dialog');
+    if (opened) {
+      // For accessibility, we want to ensure we remember the element that was
+      // focused before this dialog opened.
+      this._previousFocusedElement = this._getActiveElement();
+
+      if (dialog.showModal) {
+        dialog.showModal();
+      } else {
+        dialog.setAttribute('open', 'true');
+      }
+      if (this._previousFocusedElement) {
+        this._previousFocusedElement.blur();
+      }
+    } else {
+      if (dialog.close) {
+        dialog.close();
+      } else {
+        dialog.setAttribute('open', undefined);
+      }
+
+      if (this._previousFocusedElement) {
+        const element = this._previousFocusedElement;
+        requestAnimationFrame(() => {
+          // HACK. This is to prevent a possible accessibility bug where
+          // using a keypress to trigger a button that exits a modal causes
+          // the modal to immediately re-open because the button that
+          // originally opened the modal refocuses, and the keypress
+          // propagates.
+          element.focus();
+        });
+      }
+    }
+  }
+}
+
+customElements.define('chops-dialog', ChopsDialog);
diff --git a/static_src/elements/chops/chops-dialog/chops-dialog.test.js b/static_src/elements/chops/chops-dialog/chops-dialog.test.js
new file mode 100644
index 0000000..376496a
--- /dev/null
+++ b/static_src/elements/chops/chops-dialog/chops-dialog.test.js
@@ -0,0 +1,37 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {expect, assert} from 'chai';
+import {ChopsDialog} from './chops-dialog.js';
+
+let element;
+
+describe('chops-dialog', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-dialog');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsDialog);
+  });
+
+  it('chops-dialog is visible when open', async () => {
+    element.opened = false;
+
+    await element.updateComplete;
+
+    expect(element).not.to.be.visible;
+
+    element.opened = true;
+
+    await element.updateComplete;
+
+    expect(element).to.be.visible;
+  });
+});
diff --git a/static_src/elements/chops/chops-filter-chips/chops-filter-chips.js b/static_src/elements/chops/chops-filter-chips/chops-filter-chips.js
new file mode 100644
index 0000000..3bcc0c6
--- /dev/null
+++ b/static_src/elements/chops/chops-filter-chips/chops-filter-chips.js
@@ -0,0 +1,70 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import 'elements/chops/chops-chip/chops-chip.js';
+
+/**
+ * `<chops-filter-chips>` displays a set of filter chips.
+ * https://material.io/components/chips/#filter-chips
+ */
+export class ChopsFilterChips extends LitElement {
+  /** @override */
+  static get properties() {
+    return {
+      options: {type: Array},
+      selected: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    /** @type {Array<string>} */
+    this.options = [];
+    /** @type {Object<string, boolean>} */
+    this.selected = {};
+  }
+
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: inline-flex;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`${this.options.map((option) => this._renderChip(option))}`;
+  }
+
+  /**
+   * Render a single chip.
+   * @param {string} option The text on the chip.
+   * @return {TemplateResult}
+   */
+  _renderChip(option) {
+    return html`
+      <chops-chip
+          @click=${this.select.bind(this, option)}
+          class=${this.selected[option] ? 'selected' : ''}
+          .thumbnail=${this.selected[option] ? 'check' : ''}>
+        ${option}
+      </chops-chip>
+    `;
+  }
+
+  /**
+   * Selects or unselects an option.
+   * @param {string} option The option to select or unselect.
+   * @fires Event#change
+   */
+  select(option) {
+    this.selected = {...this.selected, [option]: !this.selected[option]};
+    this.dispatchEvent(new Event('change'));
+  }
+}
+customElements.define('chops-filter-chips', ChopsFilterChips);
diff --git a/static_src/elements/chops/chops-filter-chips/chops-filter-chips.test.js b/static_src/elements/chops/chops-filter-chips/chops-filter-chips.test.js
new file mode 100644
index 0000000..3fd2671
--- /dev/null
+++ b/static_src/elements/chops/chops-filter-chips/chops-filter-chips.test.js
@@ -0,0 +1,58 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsFilterChips} from './chops-filter-chips.js';
+
+/** @type {ChopsFilterChips} */
+let element;
+
+describe('chops-filter-chips', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('chops-filter-chips');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsFilterChips);
+  });
+
+  it('renders', async () => {
+    element.options = ['one', 'two'];
+    element.selected = {two: true};
+    await element.updateComplete;
+
+    const firstChip = element.shadowRoot.firstElementChild;
+    assert.deepEqual(firstChip.className, '');
+    assert.deepEqual(firstChip.thumbnail, '');
+
+    const lastChip = element.shadowRoot.lastElementChild;
+    assert.deepEqual(lastChip.className, 'selected');
+    assert.deepEqual(lastChip.thumbnail, 'check');
+  });
+
+  it('click', async () => {
+    const onChangeStub = sinon.stub();
+
+    element.options = ['one'];
+    await element.updateComplete;
+
+    element.addEventListener('change', onChangeStub);
+    element.shadowRoot.firstElementChild.click();
+
+    assert.isTrue(element.selected.one);
+    sinon.assert.calledOnce(onChangeStub);
+
+    element.shadowRoot.firstElementChild.click();
+
+    assert.isFalse(element.selected.one);
+    sinon.assert.calledTwice(onChangeStub);
+  });
+});
diff --git a/static_src/elements/chops/chops-snackbar/chops-snackbar.js b/static_src/elements/chops/chops-snackbar/chops-snackbar.js
new file mode 100644
index 0000000..aea71b8
--- /dev/null
+++ b/static_src/elements/chops/chops-snackbar/chops-snackbar.js
@@ -0,0 +1,63 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+
+/**
+ * `<chops-snackbar>`
+ *
+ * A container for showing messages in a snackbar.
+ *
+ */
+export class ChopsSnackbar extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        align-items: center;
+        background-color: #333;
+        border-radius: 6px;
+        bottom: 1em;
+        left: 1em;
+        color: hsla(0, 0%, 100%, .87);
+        display: flex;
+        font-size: var(--chops-large-font-size);
+        padding: 16px;
+        position: fixed;
+        z-index: 1000;
+      }
+      button {
+        background: none;
+        border: none;
+        color: inherit;
+        cursor: pointer;
+        margin: 0;
+        margin-left: 8px;
+        padding: 0;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <slot></slot>
+      <button @click=${this.close}>
+        <i class="material-icons">close</i>
+      </button>
+    `;
+  }
+
+  /**
+   * Closes the snackbar.
+   * @fires CustomEvent#close
+   */
+  close() {
+    this.dispatchEvent(new CustomEvent('close'));
+  }
+}
+
+customElements.define('chops-snackbar', ChopsSnackbar);
diff --git a/static_src/elements/chops/chops-snackbar/chops-snackbar.test.js b/static_src/elements/chops/chops-snackbar/chops-snackbar.test.js
new file mode 100644
index 0000000..fa45d68
--- /dev/null
+++ b/static_src/elements/chops/chops-snackbar/chops-snackbar.test.js
@@ -0,0 +1,36 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsSnackbar} from './chops-snackbar.js';
+
+let element;
+
+describe('chops-snackbar', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-snackbar');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsSnackbar);
+  });
+
+  it('dispatches close event on close click', async () => {
+    element.opened = true;
+    await element.updateComplete;
+
+    const listener = sinon.stub();
+    element.addEventListener('close', listener);
+
+    element.shadowRoot.querySelector('button').click();
+
+    sinon.assert.calledOnce(listener);
+  });
+});
diff --git a/static_src/elements/chops/chops-timestamp/chops-timestamp-helpers.js b/static_src/elements/chops/chops-timestamp/chops-timestamp-helpers.js
new file mode 100644
index 0000000..2fa1dc2
--- /dev/null
+++ b/static_src/elements/chops/chops-timestamp/chops-timestamp-helpers.js
@@ -0,0 +1,109 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const DEFAULT_DATE_LOCALE = 'en-US';
+
+// Creating the datetime formatter costs ~1.5 ms, so when formatting
+// multiple timestamps, it's more performant to reuse the formatter object.
+// Export FORMATTER and SHORT_FORMATTER for testing. The return value differs
+// based on time zone and browser, so we can't use static strings for testing.
+// We can't stub out the method because it's native code and can't be modified.
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat/format#Avoid_comparing_formatted_date_values_to_static_values
+export const FORMATTER = new Intl.DateTimeFormat(DEFAULT_DATE_LOCALE, {
+  weekday: 'short',
+  year: 'numeric',
+  month: 'short',
+  day: 'numeric',
+  hour: 'numeric',
+  minute: '2-digit',
+  timeZoneName: 'short',
+});
+
+export const SHORT_FORMATTER = new Intl.DateTimeFormat(DEFAULT_DATE_LOCALE, {
+  year: 'numeric',
+  month: 'short',
+  day: 'numeric',
+});
+
+export const MS_PER_MINUTE = 60 * 1000;
+export const MS_PER_HOUR = MS_PER_MINUTE * 60;
+export const MS_PER_DAY = MS_PER_HOUR * 24;
+export const MS_PER_MONTH = MS_PER_DAY * 30;
+
+/**
+ * Helper to determine if a Date was less than a month ago.
+ * @param {Date} date The date to check.
+ * @return {boolean} Whether the date was less than a
+ *   month ago.
+ */
+function isLessThanAMonthAgo(date) {
+  const now = new Date();
+  const msDiff = Math.abs(Math.floor((now.getTime() - date.getTime())));
+  return msDiff < MS_PER_MONTH;
+}
+
+/**
+ * Displays timestamp in a standardized format to be re-used.
+ * @param {Date} date
+ * @return {string}
+ */
+export function standardTime(date) {
+  if (!date) return;
+  const absoluteTime = FORMATTER.format(date);
+
+  let timeAgoBit = '';
+  if (isLessThanAMonthAgo(date)) {
+    // Only show relative time if the time is less than a
+    // month ago because otherwise, it's not as useful.
+    timeAgoBit = ` (${relativeTime(date)})`;
+  }
+  return `${absoluteTime}${timeAgoBit}`;
+}
+
+/**
+ * Displays a timestamp in a format that's easy for a human to immediately
+ * reason about, based on long ago the time was.
+ * @param {Date} date native JavaScript Data Object.
+ * @return {string} Human-readable string of the date.
+ */
+export function relativeTime(date) {
+  if (!date) return;
+
+  const now = new Date();
+  let msDiff = now.getTime() - date.getTime();
+
+  // Use different wording depending on whether the time is in the
+  // future or past.
+  const pastOrPresentSuffix = msDiff < 0 ? 'from now' : 'ago';
+  msDiff = Math.abs(msDiff);
+
+  if (msDiff < MS_PER_MINUTE) {
+    // Less than a minute.
+    return 'just now';
+  } else if (msDiff < MS_PER_HOUR) {
+    // Less than an hour.
+    const minutes = Math.floor(msDiff / MS_PER_MINUTE);
+    if (minutes === 1) {
+      return `a minute ${pastOrPresentSuffix}`;
+    }
+    return `${minutes} minutes ${pastOrPresentSuffix}`;
+  } else if (msDiff < MS_PER_DAY) {
+    // Less than an day.
+    const hours = Math.floor(msDiff / MS_PER_HOUR);
+    if (hours === 1) {
+      return `an hour ${pastOrPresentSuffix}`;
+    }
+    return `${hours} hours ${pastOrPresentSuffix}`;
+  } else if (msDiff < MS_PER_MONTH) {
+    // Less than a month.
+    const days = Math.floor(msDiff / MS_PER_DAY);
+    if (days === 1) {
+      return `a day ${pastOrPresentSuffix}`;
+    }
+    return `${days} days ${pastOrPresentSuffix}`;
+  }
+
+  // A month or more ago. Better to show an exact date at this point.
+  return SHORT_FORMATTER.format(date);
+}
diff --git a/static_src/elements/chops/chops-timestamp/chops-timestamp-helpers.test.js b/static_src/elements/chops/chops-timestamp/chops-timestamp-helpers.test.js
new file mode 100644
index 0000000..5fe344b
--- /dev/null
+++ b/static_src/elements/chops/chops-timestamp/chops-timestamp-helpers.test.js
@@ -0,0 +1,112 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {FORMATTER, MS_PER_MONTH, standardTime,
+  relativeTime} from './chops-timestamp-helpers.js';
+import sinon from 'sinon';
+
+// The formatted date strings differ based on time zone and browser, so we can't
+// use static strings for testing. We can't stub out the format method because
+// it's native code and can't be modified. So just use the FORMATTER object.
+
+let clock;
+
+describe('chops-timestamp-helpers', () => {
+  beforeEach(() => {
+    // Set clock to the Epoch.
+    clock = sinon.useFakeTimers({
+      now: new Date(0),
+      shouldAdvanceTime: false,
+    });
+  });
+
+  afterEach(() => {
+    clock.restore();
+  });
+
+  describe('standardTime', () => {
+    it('shows relative timestamp when less than a month ago', () => {
+      const date = new Date();
+      assert.equal(standardTime(date), `${FORMATTER.format(date)} (just now)`);
+    });
+
+    it('no relative time when more than a month in the future', () => {
+      const date = new Date(1548808276 * 1000);
+      assert.equal(standardTime(date), 'Tue, Jan 29, 2019, 4:31 PM PST');
+    });
+
+    it('no relative time when more than a month in the past', () => {
+      // Jan 29, 2019, 4:31 PM PST
+      const now = 1548808276 * 1000;
+      clock.tick(now);
+
+      const date = new Date(now - MS_PER_MONTH);
+      assert.equal(standardTime(date), 'Sun, Dec 30, 2018, 4:31 PM PST');
+    });
+  });
+
+  it('relativeTime future', () => {
+    assert.equal(relativeTime(new Date()), `just now`);
+
+    assert.equal(relativeTime(new Date(59 * 1000)), `just now`);
+
+    assert.equal(relativeTime(new Date(60 * 1000)), `a minute from now`);
+    assert.equal(relativeTime(new Date(2 * 60 * 1000)),
+        `2 minutes from now`);
+    assert.equal(relativeTime(new Date(59 * 60 * 1000)),
+        `59 minutes from now`);
+
+    assert.equal(relativeTime(new Date(60 * 60 * 1000)), `an hour from now`);
+    assert.equal(relativeTime(new Date(2 * 60 * 60 * 1000)),
+        `2 hours from now`);
+    assert.equal(relativeTime(new Date(23 * 60 * 60 * 1000)),
+        `23 hours from now`);
+
+    assert.equal(relativeTime(new Date(24 * 60 * 60 * 1000)),
+        `a day from now`);
+    assert.equal(relativeTime(new Date(2 * 24 * 60 * 60 * 1000)),
+        `2 days from now`);
+    assert.equal(relativeTime(new Date(29 * 24 * 60 * 60 * 1000)),
+        `29 days from now`);
+
+    assert.equal(relativeTime(new Date(30 * 24 * 60 * 60 * 1000)),
+        'Jan 30, 1970');
+  });
+
+  it('relativeTime past', () => {
+    const baseTime = 234234 * 1000;
+
+    clock.tick(baseTime);
+
+    assert.equal(relativeTime(new Date()), `just now`);
+
+    assert.equal(relativeTime(new Date(baseTime - 59 * 1000)),
+        `just now`);
+
+    assert.equal(relativeTime(new Date(baseTime - 60 * 1000)),
+        `a minute ago`);
+    assert.equal(relativeTime(new Date(baseTime - 2 * 60 * 1000)),
+        `2 minutes ago`);
+    assert.equal(relativeTime(new Date(baseTime - 59 * 60 * 1000)),
+        `59 minutes ago`);
+
+    assert.equal(relativeTime(new Date(baseTime - 60 * 60 * 1000)),
+        `an hour ago`);
+    assert.equal(relativeTime(new Date(baseTime - 2 * 60 * 60 * 1000)),
+        `2 hours ago`);
+    assert.equal(relativeTime(new Date(baseTime - 23 * 60 * 60 * 1000)),
+        `23 hours ago`);
+
+    assert.equal(relativeTime(new Date(
+        baseTime - 24 * 60 * 60 * 1000)), `a day ago`);
+    assert.equal(relativeTime(new Date(
+        baseTime - 2 * 24 * 60 * 60 * 1000)), `2 days ago`);
+    assert.equal(relativeTime(new Date(
+        baseTime - 29 * 24 * 60 * 60 * 1000)), `29 days ago`);
+
+    assert.equal(relativeTime(new Date(
+        baseTime - 30 * 24 * 60 * 60 * 1000)), 'Dec 4, 1969');
+  });
+});
diff --git a/static_src/elements/chops/chops-timestamp/chops-timestamp.js b/static_src/elements/chops/chops-timestamp/chops-timestamp.js
new file mode 100644
index 0000000..b7f157f
--- /dev/null
+++ b/static_src/elements/chops/chops-timestamp/chops-timestamp.js
@@ -0,0 +1,93 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import {standardTime, relativeTime} from './chops-timestamp-helpers.js';
+
+/**
+ * `<chops-timestamp>`
+ *
+ * This element shows a time in a human readable form.
+ *
+ * @customElement
+ */
+export class ChopsTimestamp extends LitElement {
+  /** @override */
+  render() {
+    return html`
+      ${this._displayedTime}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /** The data for the time which can be in any format readable by
+       *  Date.parse.
+       */
+      timestamp: {type: String},
+      /** When true, a shorter version of the date will be displayed. */
+      short: {type: Boolean},
+      /**
+       * The Date object, which is stored in UTC, to be converted to a string.
+      */
+      _date: {type: Object},
+    };
+  }
+
+  /**
+   * @return {string} Human-readable timestamp.
+   */
+  get _displayedTime() {
+    const date = this._date;
+    const short = this.short;
+    // TODO(zhangtiff): Add logic to dynamically re-compute relative time
+    //   based on set intervals.
+    if (!date) return;
+    if (short) {
+      return relativeTime(date);
+    }
+    return standardTime(date);
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('timestamp')) {
+      this._date = this._parseTimestamp(this.timestamp);
+      this.setAttribute('title', standardTime(this._date));
+    }
+    super.update(changedProperties);
+  }
+
+  /**
+   * Turns a timestamp string into a native JavaScript Date Object.
+   * @param {string} timestamp Timestamp string in either an ISO format or
+   *   Unix timestamp format. If Unix time, the function expects the time in
+   *   seconds, not milliseconds.
+   * @return {Date}
+   */
+  _parseTimestamp(timestamp) {
+    if (!timestamp) return;
+
+    let unixTimeMs = 0;
+    // Make sure to do Date.parse before Number.parseInt because parseInt
+    // will parse numbers within a string.
+    if (/^\d+$/.test(timestamp)) {
+      // Check if a string contains only digits before guessing it's
+      // unix time. This is necessary because Number.parseInt will parse
+      // number strings that contain non-numbers.
+      unixTimeMs = Number.parseInt(timestamp) * 1000;
+    } else {
+      // Date.parse will parse strings with only numbers as though those
+      // strings were truncated ISO formatted strings.
+      unixTimeMs = Date.parse(timestamp);
+      if (Number.isNaN(unixTimeMs)) {
+        throw new Error('Timestamp is in an invalid format.');
+      }
+    }
+    return new Date(unixTimeMs);
+  }
+}
+customElements.define('chops-timestamp', ChopsTimestamp);
diff --git a/static_src/elements/chops/chops-timestamp/chops-timestamp.test.js b/static_src/elements/chops/chops-timestamp/chops-timestamp.test.js
new file mode 100644
index 0000000..21c227d
--- /dev/null
+++ b/static_src/elements/chops/chops-timestamp/chops-timestamp.test.js
@@ -0,0 +1,88 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert, expect} from 'chai';
+import {ChopsTimestamp} from './chops-timestamp.js';
+import {FORMATTER, SHORT_FORMATTER} from './chops-timestamp-helpers.js';
+import sinon from 'sinon';
+
+// The formatted date strings differ based on time zone and browser, so we can't
+// use static strings for testing. We can't stub out the format method because
+// it's native code and can't be modified. So just use the FORMATTER object.
+
+let element;
+let clock;
+
+describe('chops-timestamp', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-timestamp');
+    document.body.appendChild(element);
+
+    // Set clock to the Epoch.
+    clock = sinon.useFakeTimers({
+      now: new Date(0),
+      shouldAdvanceTime: false,
+    });
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    clock.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsTimestamp);
+  });
+
+  it('changing timestamp changes date', async () => {
+    const timestamp = 1548808276;
+    element.timestamp = String(timestamp);
+
+    await element.updateComplete;
+
+    assert.include(element.shadowRoot.textContent,
+        FORMATTER.format(new Date(timestamp * 1000)));
+  });
+
+  it('parses ISO dates', async () => {
+    const timestamp = '2016-11-11';
+    element.timestamp = timestamp;
+
+    await element.updateComplete;
+
+    assert.include(element.shadowRoot.textContent,
+        FORMATTER.format(new Date(timestamp)));
+  });
+
+  it('invalid timestamp format', () => {
+    expect(() => {
+      element._parseTimestamp('random string');
+    }).to.throw('Timestamp is in an invalid format.');
+  });
+
+  it('short time renders shorter time', async () => {
+    element.short = true;
+    element.timestamp = '5';
+
+    await element.updateComplete;
+
+    assert.include(element.shadowRoot.textContent,
+        `just now`);
+
+    element.timestamp = '60';
+
+    await element.updateComplete;
+
+    assert.include(element.shadowRoot.textContent,
+        `a minute from now`);
+
+    const timestamp = 1548808276;
+    element.timestamp = String(timestamp);
+
+    await element.updateComplete;
+
+    assert.include(element.shadowRoot.textContent,
+        SHORT_FORMATTER.format(timestamp * 1000));
+  });
+});
diff --git a/static_src/elements/chops/chops-toggle/chops-toggle.js b/static_src/elements/chops/chops-toggle/chops-toggle.js
new file mode 100644
index 0000000..52868bd
--- /dev/null
+++ b/static_src/elements/chops/chops-toggle/chops-toggle.js
@@ -0,0 +1,124 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-toggle>`
+ *
+ * A toggle button component. This component is primarily a wrapper
+ * around a native checkbox to allow easy sharing of styles.
+ *
+ */
+export class ChopsToggle extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        --chops-toggle-bg: none;
+        --chops-toggle-color: var(--chops-primary-font-color);
+        --chops-toggle-hover-bg: rgba(0, 0, 0, 0.3);
+        --chops-toggle-focus-border: hsl(193, 82%, 63%);
+        --chops-toggle-checked-bg: rgba(0, 0, 0, 0.6);
+        --chops-toggle-checked-color: var(--chops-white);
+      }
+      label {
+        background: var(--chops-toggle-bg);
+        color: var(--chops-toggle-color);
+        cursor: pointer;
+        align-items: center;
+        padding: 2px 4px;
+        border: var(--chops-normal-border);
+        border-radius: var(--chops-button-radius);
+      }
+      input[type="checkbox"] {
+        /* We need the checkbox to be hidden but still accessible. */
+        opacity: 0;
+        width: 0;
+        height: 0;
+        position: absolute;
+        top: -9999;
+        left: -9999;
+      }
+      input[type="checkbox"]:focus + label {
+        /* Make sure an outline shows around this element for
+        * accessibility.
+        */
+        box-shadow: 0 0 5px 1px var(--chops-toggle-focus-border);
+      }
+      input[type="checkbox"]:hover + label {
+        background: var(--chops-toggle-hover-bg);
+      }
+      input[type="checkbox"]:checked + label {
+        background: var(--chops-toggle-checked-bg);
+        color: var(--chops-toggle-checked-color);
+      }
+      input[type="checkbox"]:disabled + label {
+        opacity: 0.8;
+        cursor: default;
+        pointer-events: none;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <input id="checkbox"
+        type="checkbox"
+        ?checked=${this.checked}
+        ?disabled=${this.disabled}
+        @change=${this._checkedChangeHandler}
+      >
+      <label for="checkbox">
+        <slot></slot>
+      </label>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Note: At the moment, this component does not manage its own
+       * internal checked state. It expects its checked state to come
+       * from its parent, and its parent is expected to update the
+       * chops-checkbox's checked state on a change event.
+       *
+       * This can be generalized in the future to support multiple
+       * ways of managing checked state if needed.
+       **/
+      checked: {type: Boolean},
+      /**
+       * Whether the element currently allows checking or not.
+       */
+      disabled: {type: Boolean},
+    };
+  }
+
+  click() {
+    super.click();
+    this.shadowRoot.querySelector('#checkbox').click();
+  }
+
+  _checkedChangeHandler(evt) {
+    this._checkedChange(evt.target.checked);
+  }
+
+  /**
+   * @param {boolean} checked
+   * @fires CustomEvent#checked-change
+   * @private
+   */
+  _checkedChange(checked) {
+    if (checked === this.checked) return;
+    const customEvent = new CustomEvent('checked-change', {
+      detail: {
+        checked: checked,
+      },
+    });
+    this.dispatchEvent(customEvent);
+  }
+}
+customElements.define('chops-toggle', ChopsToggle);
diff --git a/static_src/elements/chops/chops-toggle/chops-toggle.test.js b/static_src/elements/chops/chops-toggle/chops-toggle.test.js
new file mode 100644
index 0000000..423c993
--- /dev/null
+++ b/static_src/elements/chops/chops-toggle/chops-toggle.test.js
@@ -0,0 +1,45 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsToggle} from './chops-toggle.js';
+
+let element;
+
+describe('chops-toggle', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-toggle');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsToggle);
+  });
+
+  it('clicking toggle dispatches checked-change event', async () => {
+    element.checked = false;
+    sinon.stub(window, 'CustomEvent');
+    sinon.stub(element, 'dispatchEvent');
+
+    await element.updateComplete;
+
+    element.click();
+
+    assert.deepEqual(window.CustomEvent.args[0][0], 'checked-change');
+    assert.deepEqual(window.CustomEvent.args[0][1], {
+      detail: {checked: true},
+    });
+
+    assert.isTrue(window.CustomEvent.calledOnce);
+    assert.isTrue(element.dispatchEvent.calledOnce);
+
+    window.CustomEvent.restore();
+    element.dispatchEvent.restore();
+  });
+});
diff --git a/static_src/elements/ezt/ezt-app-base.js b/static_src/elements/ezt/ezt-app-base.js
new file mode 100644
index 0000000..0dc3eae
--- /dev/null
+++ b/static_src/elements/ezt/ezt-app-base.js
@@ -0,0 +1,62 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement} from 'lit-element';
+import qs from 'qs';
+import {store, connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+/**
+ * `<ezt-app-base>`
+ *
+ * Base component meant to simulate a subset of the work mr-app does on
+ * EZT pages in order to allow us to more easily glue web components
+ * on EZT pages to SPA web components.
+ *
+ */
+export class EztAppBase extends connectStore(LitElement) {
+  /** @override */
+  static get properties() {
+    return {
+      projectName: {type: String},
+      userDisplayName: {type: String},
+    };
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    this.mapUrlToQueryParams();
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('userDisplayName') && this.userDisplayName) {
+      this.fetchUserData(this.userDisplayName);
+    }
+
+    if (changedProperties.has('projectName') && this.projectName) {
+      this.fetchProjectData(this.projectName);
+    }
+  }
+
+  fetchUserData(displayName) {
+    store.dispatch(userV0.fetch(displayName));
+  }
+
+  fetchProjectData(projectName) {
+    store.dispatch(projectV0.select(projectName));
+    store.dispatch(projectV0.fetch(projectName));
+  }
+
+  mapUrlToQueryParams() {
+    const params = qs.parse((window.location.search || '').substr(1));
+
+    store.dispatch(sitewide.setQueryParams(params));
+  }
+}
+customElements.define('ezt-app-base', EztAppBase);
diff --git a/static_src/elements/ezt/ezt-app-base.test.js b/static_src/elements/ezt/ezt-app-base.test.js
new file mode 100644
index 0000000..86eb5b1
--- /dev/null
+++ b/static_src/elements/ezt/ezt-app-base.test.js
@@ -0,0 +1,65 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {EztAppBase} from './ezt-app-base.js';
+
+
+let element;
+
+describe('ezt-app-base', () => {
+  beforeEach(() => {
+    element = document.createElement('ezt-app-base');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, EztAppBase);
+  });
+
+  it('fetches user data when userDisplayName set', async () => {
+    sinon.stub(element, 'fetchUserData');
+
+    element.userDisplayName = 'test@example.com';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetchUserData);
+    sinon.assert.calledWith(element.fetchUserData, 'test@example.com');
+  });
+
+  it('does not fetch data when userDisplayName is empty', async () => {
+    sinon.stub(element, 'fetchUserData');
+    element.userDisplayName = '';
+
+    await element.updateComplete;
+
+    sinon.assert.notCalled(element.fetchUserData);
+  });
+
+  it('fetches project data when projectName set', async () => {
+    sinon.stub(element, 'fetchProjectData');
+
+    element.projectName = 'chromium';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.fetchProjectData);
+    sinon.assert.calledWith(element.fetchProjectData, 'chromium');
+  });
+
+  it('does not fetch data when projectName is empty', async () => {
+    sinon.stub(element, 'fetchProjectData');
+    element.projectName = '';
+
+    await element.updateComplete;
+
+    sinon.assert.notCalled(element.fetchProjectData);
+  });
+});
diff --git a/static_src/elements/ezt/ezt-element-package.js b/static_src/elements/ezt/ezt-element-package.js
new file mode 100644
index 0000000..90ffadb
--- /dev/null
+++ b/static_src/elements/ezt/ezt-element-package.js
@@ -0,0 +1,29 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file bundles together all web components elements used on the
+// legacy EZT pages. This is to avoid having issues with registering
+// duplicate versions of dependencies.
+
+import page from 'page';
+
+import 'elements/framework/mr-dropdown/mr-account-dropdown.js';
+import 'elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.js';
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+
+import 'elements/framework/mr-header/mr-header.js';
+import 'elements/issue-list/mr-chart/mr-chart.js';
+import 'elements/issue-detail/mr-flipper/mr-flipper.js';
+import 'elements/framework/mr-pref-toggle/mr-pref-toggle.js';
+import 'elements/ezt/ezt-show-columns-connector.js';
+import 'elements/ezt/ezt-app-base.js';
+
+// Register an empty set of page.js routes to allow the page() navigation
+// function to work.
+// Note: The EZT pages should NOT register the routes used by the SPA pages
+// without significant refactoring because doing so will lead to unexpected
+// routing behavior where the SPA is loaded on top of a server-rendered page
+// rather than instead of.
+page();
diff --git a/static_src/elements/ezt/ezt-footer-scripts-package.js b/static_src/elements/ezt/ezt-footer-scripts-package.js
new file mode 100644
index 0000000..85eeaa0
--- /dev/null
+++ b/static_src/elements/ezt/ezt-footer-scripts-package.js
@@ -0,0 +1,14 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file bundles together scripts to be loaded through the legacy
+// EZT footer.
+
+import 'monitoring/client-logger.js';
+import 'monitoring/track-copy.js';
+
+// Allow EZT pages to import AutoRefreshPrpcClient.
+import AutoRefreshPrpcClient from 'prpc.js';
+
+window.AutoRefreshPrpcClient = AutoRefreshPrpcClient;
diff --git a/static_src/elements/ezt/ezt-show-columns-connector.js b/static_src/elements/ezt/ezt-show-columns-connector.js
new file mode 100644
index 0000000..c6b3347
--- /dev/null
+++ b/static_src/elements/ezt/ezt-show-columns-connector.js
@@ -0,0 +1,117 @@
+/**
+ * @fileoverview Description of this file.
+ */
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+import {store, connectStore} from 'reducers/base.js';
+import qs from 'qs';
+import * as sitewide from 'reducers/sitewide.js';
+import 'elements/framework/mr-issue-list/mr-show-columns-dropdown.js';
+import {parseColSpec} from 'shared/issue-fields.js';
+import {equalsIgnoreCase} from 'shared/helpers.js';
+import {DEFAULT_ISSUE_FIELD_LIST} from 'shared/issue-fields.js';
+
+/**
+ * `<ezt-show-columns-connector>`
+ *
+ * Glue component to make "Show columns" dropdown work on EZT.
+ *
+ */
+export class EztShowColumnsConnector extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+      <mr-show-columns-dropdown
+        .defaultFields=${DEFAULT_ISSUE_FIELD_LIST}
+        .columns=${this.columns}
+        .phaseNames=${this.phaseNames}
+        .onHideColumn=${(name) => this.onHideColumn(name)}
+        .onShowColumn=${(name) => this.onShowColumn(name)}
+      ></mr-show-columns-dropdown>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      initialColumns: {type: Array},
+      hiddenColumns: {type: Object},
+      queryParams: {type: Object},
+      colspec: {type: String},
+      phasespec: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.hiddenColumns = new Set();
+    this.queryParams = {};
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.queryParams = sitewide.queryParams(state);
+  }
+
+  get columns() {
+    return this.initialColumns.filter((_, i) =>
+      !this.hiddenColumns.has(i));
+  }
+
+  get initialColumns() {
+    // EZT will always pass in a colspec.
+    return parseColSpec(this.colspec);
+  }
+
+  get phaseNames() {
+    return parseColSpec(this.phasespec);
+  }
+
+  onHideColumn(colName) {
+    // Custom column hiding logic to avoid reloading the
+    // EZT list page when a user hides a column.
+    const colIndex = this.initialColumns.findIndex(
+        (col) => equalsIgnoreCase(col, colName));
+
+    // Legacy code integration.
+    TKR_toggleColumn('hide_col_' + colIndex);
+
+    this.hiddenColumns.add(colIndex);
+
+    this.reflectColumnsToQueryParams();
+    this.requestUpdate();
+
+    // Don't continue navigation.
+    return false;
+  }
+
+  onShowColumn(colName) {
+    const colIndex = this.initialColumns.findIndex(
+        (col) => equalsIgnoreCase(col, colName));
+    if (colIndex >= 0) {
+      this.hiddenColumns.delete(colIndex);
+      TKR_toggleColumn('hide_col_' + colIndex);
+
+      this.reflectColumnsToQueryParams();
+      this.requestUpdate();
+      return false;
+    }
+    // Reload the page if this column is not part of the initial
+    // table render.
+    return true;
+  }
+
+  reflectColumnsToQueryParams() {
+    this.queryParams.colspec = this.columns.join(' ');
+
+    // Make sure the column changes in the URL.
+    window.history.replaceState({}, '', '?' + qs.stringify(this.queryParams));
+
+    store.dispatch(sitewide.setQueryParams(this.queryParams));
+  }
+}
+customElements.define('ezt-show-columns-connector', EztShowColumnsConnector);
diff --git a/static_src/elements/ezt/ezt-show-columns-connector.test.js b/static_src/elements/ezt/ezt-show-columns-connector.test.js
new file mode 100644
index 0000000..62bd13b
--- /dev/null
+++ b/static_src/elements/ezt/ezt-show-columns-connector.test.js
@@ -0,0 +1,41 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {EztShowColumnsConnector} from './ezt-show-columns-connector.js';
+
+
+let element;
+
+describe('ezt-show-columns-connector', () => {
+  beforeEach(() => {
+    element = document.createElement('ezt-show-columns-connector');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, EztShowColumnsConnector);
+  });
+
+  it('initialColumns parses colspec', () => {
+    element.colspec = 'Summary ID Owner';
+    assert.deepEqual(element.initialColumns, ['Summary', 'ID', 'Owner']);
+  });
+
+  it('filters columns based on column mask', () => {
+    sinon.stub(element, 'initialColumns').get(() => ['ID', 'Summary']);
+    element.hiddenColumns = new Set([1]);
+
+    assert.deepEqual(element.columns, ['ID']);
+  });
+
+  it('phaseNames parses phasespec', () => {
+    element.phasespec = 'stable beta stable-exp';
+    assert.deepEqual(element.phaseNames, ['stable', 'beta', 'stable-exp']);
+  });
+});
diff --git a/static_src/elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.js b/static_src/elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.js
new file mode 100644
index 0000000..d9318fc
--- /dev/null
+++ b/static_src/elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.js
@@ -0,0 +1,283 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+import 'elements/issue-detail/metadata/mr-edit-field/mr-edit-field.js';
+import 'elements/framework/mr-error/mr-error.js';
+import 'react/mr-react-autocomplete.tsx';
+import {prpcClient} from 'prpc-client-instance.js';
+import {EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import {TEXT_TO_STATUS_ENUM} from 'shared/consts/approval.js';
+
+
+export const NO_UPDATES_MESSAGE =
+  'User lacks approver perms for approval in all issues.';
+export const NO_APPROVALS_MESSAGE = 'These issues don\'t have any approvals.';
+
+export class MrBulkApprovalUpdate extends LitElement {
+  /** @override */
+  render() {
+    return html`
+      <style>
+        mr-bulk-approval-update {
+          display: block;
+          margin-top: 30px;
+          position: relative;
+        }
+        button.clickable-text {
+          background: none;
+          border: 0;
+          color: hsl(0, 0%, 39%);
+          cursor: pointer;
+          text-decoration: underline;
+        }
+        .hidden {
+          display: none; !important;
+        }
+        .message {
+          background-color: beige;
+          width: 500px;
+        }
+        .note {
+          color: hsl(0, 0%, 25%);
+          font-size: 0.85em;
+          font-style: italic;
+        }
+        mr-bulk-approval-update table {
+          border: 1px dotted black;
+          cellspacing: 0;
+          cellpadding: 3;
+        }
+        #approversInput {
+          border-style: none;
+        }
+      </style>
+      <button
+        class="js-showApprovals clickable-text"
+        ?hidden=${this.approvalsFetched}
+        @click=${this.fetchApprovals}
+      >Show Approvals</button>
+      ${this.approvals.length ? html`
+        <form>
+          <table>
+            <tbody><tr>
+              <th><label for="approvalSelect">Approval:</label></th>
+              <td>
+                <select
+                  id="approvalSelect"
+                  @change=${this._changeHandlers.approval}
+                >
+                  ${this.approvals.map(({fieldRef}) => html`
+                    <option
+                      value=${fieldRef.fieldName}
+                      .selected=${fieldRef.fieldName === this._values.approval}
+                    >
+                      ${fieldRef.fieldName}
+                    </option>
+                  `)}
+                </select>
+              </td>
+            </tr>
+            <tr>
+              <th><label for="approversInput">Approvers:</label></th>
+              <td>
+                <mr-react-autocomplete
+                  label="approversInput"
+                  vocabularyName="member"
+                  .multiple=${true}
+                  .value=${this._values.approvers}
+                  .onChange=${this._changeHandlers.approvers}
+                ></mr-react-autocomplete>
+              </td>
+            </tr>
+            <tr><th><label for="statusInput">Status:</label></th>
+              <td>
+                <select
+                  id="statusInput"
+                  @change=${this._changeHandlers.status}
+                >
+                  <option .selected=${!this._values.status}>
+                    ${EMPTY_FIELD_VALUE}
+                  </option>
+                  ${this.statusOptions.map((status) => html`
+                    <option
+                      value=${status}
+                      .selected=${status === this._values.status}
+                    >${status}</option>
+                  `)}
+                </select>
+              </td>
+            </tr>
+            <tr>
+              <th><label for="commentText">Comment:</label></th>
+              <td colspan="4">
+                <textarea
+                  cols="30"
+                  rows="3"
+                  id="commentText"
+                  placeholder="Add an approval comment"
+                  .value=${this._values.comment || ''}
+                  @change=${this._changeHandlers.comment}
+                ></textarea>
+              </td>
+            </tr>
+            <tr>
+              <td>
+                <button
+                  class="js-save"
+                  @click=${this.save}
+                >Update Approvals only</button>
+              </td>
+              <td>
+                <span class="note">
+                 Note: Some approvals may not be updated if you lack
+                 approver perms.
+                </span>
+              </td>
+            </tr>
+          </tbody></table>
+        </form>
+      `: ''}
+      <div class="message">
+        ${this.responseMessage}
+        ${this.errorMessage ? html`
+          <mr-error>${this.errorMessage}</mr-error>
+        ` : ''}
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      approvals: {type: Array},
+      approvalsFetched: {type: Boolean},
+      statusOptions: {type: Array},
+      localIdsStr: {type: String},
+      projectName: {type: String},
+      responseMessage: {type: String},
+      _values: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.approvals = [];
+    this.statusOptions = Object.keys(TEXT_TO_STATUS_ENUM);
+    this.responseMessage = '';
+
+    this._values = {};
+    this._changeHandlers = {
+      approval: this._onChange.bind(this, 'approval'),
+      approvers: this._onChange.bind(this, 'approvers'),
+      status: this._onChange.bind(this, 'status'),
+      comment: this._onChange.bind(this, 'comment'),
+    };
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  get issueRefs() {
+    const {projectName, localIdsStr} = this;
+    if (!projectName || !localIdsStr) return [];
+    const issueRefs = [];
+    const localIds = localIdsStr.split(',');
+    localIds.forEach((localId) => {
+      issueRefs.push({projectName: projectName, localId: localId});
+    });
+    return issueRefs;
+  }
+
+  fetchApprovals(evt) {
+    const message = {issueRefs: this.issueRefs};
+    prpcClient.call('monorail.Issues', 'ListApplicableFieldDefs', message).then(
+        (resp) => {
+          if (resp.fieldDefs) {
+            this.approvals = resp.fieldDefs.filter((fieldDef) => {
+              return fieldDef.fieldRef.type == 'APPROVAL_TYPE';
+            });
+          }
+          if (!this.approvals.length) {
+            this.errorMessage = NO_APPROVALS_MESSAGE;
+          }
+          this.approvalsFetched = true;
+        }, (error) => {
+          this.approvalsFetched = true;
+          this.errorMessage = error;
+        });
+  }
+
+  save(evt) {
+    this.responseMessage = '';
+    this.errorMessage = '';
+    this.toggleDisableForm();
+    const selectedFieldDef = this.approvals.find(
+        (approval) => approval.fieldRef.fieldName === this._values.approval
+    ) || this.approvals[0];
+    const message = {
+      issueRefs: this.issueRefs,
+      fieldRef: selectedFieldDef.fieldRef,
+      send_email: true,
+    };
+    message.commentContent = this._values.comment;
+    const delta = {};
+    if (this._values.status !== EMPTY_FIELD_VALUE) {
+      delta.status = TEXT_TO_STATUS_ENUM[this._values.status];
+    }
+    const approversAdded = this._values.approvers;
+    if (approversAdded) {
+      delta.approverRefsAdd = approversAdded.map(
+          (name) => ({'displayName': name}));
+    }
+    if (Object.keys(delta).length) {
+      message.approvalDelta = delta;
+    }
+    prpcClient.call('monorail.Issues', 'BulkUpdateApprovals', message).then(
+        (resp) => {
+          if (resp.issueRefs && resp.issueRefs.length) {
+            const idsStr = Array.from(resp.issueRefs,
+                (ref) => ref.localId).join(', ');
+            this.responseMessage = `${this.getTimeStamp()}: Updated ${
+              selectedFieldDef.fieldRef.fieldName} in issues: ${idsStr} (${
+              resp.issueRefs.length} of ${this.issueRefs.length}).`;
+            this._values = {};
+          } else {
+            this.errorMessage = NO_UPDATES_MESSAGE;
+          };
+          this.toggleDisableForm();
+        }, (error) => {
+          this.errorMessage = error;
+          this.toggleDisableForm();
+        });
+  }
+
+  getTimeStamp() {
+    const date = new Date();
+    return `${date.getHours()}:${date.getMinutes()}:${date.getSeconds()}`;
+  }
+
+  toggleDisableForm() {
+    this.querySelectorAll('input, textarea, select, button').forEach(
+        (input) => {
+          input.disabled = !input.disabled;
+        });
+  }
+
+  /**
+   * Generic onChange handler to be bound to each form field.
+   * @param {string} key Unique name for the form field we're binding this
+   *   handler to. For example, 'owner', 'cc', or the name of a custom field.
+   * @param {Event | React.SyntheticEvent} event
+   * @param {string} value The new form value.
+   */
+  _onChange(key, event, value) {
+    this._values = {...this._values, [key]: value || event.target.value};
+  }
+}
+
+customElements.define('mr-bulk-approval-update', MrBulkApprovalUpdate);
diff --git a/static_src/elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.test.js b/static_src/elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.test.js
new file mode 100644
index 0000000..a0689e1
--- /dev/null
+++ b/static_src/elements/ezt/mr-bulk-approval-update/mr-bulk-approval-update.test.js
@@ -0,0 +1,185 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {fireEvent} from '@testing-library/react';
+
+import {MrBulkApprovalUpdate, NO_APPROVALS_MESSAGE,
+  NO_UPDATES_MESSAGE} from './mr-bulk-approval-update.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+let element;
+
+describe('mr-bulk-approval-update', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-bulk-approval-update');
+    document.body.appendChild(element);
+
+    sinon.stub(prpcClient, 'call');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    prpcClient.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrBulkApprovalUpdate);
+  });
+
+  it('_computeIssueRefs: missing information', () => {
+    element.projectName = 'chromium';
+    assert.equal(element.issueRefs.length, 0);
+
+    element.projectName = null;
+    element.localIdsStr = '1,2,3,5';
+    assert.equal(element.issueRefs.length, 0);
+
+    element.localIdsStr = null;
+    assert.equal(element.issueRefs.length, 0);
+  });
+
+  it('_computeIssueRefs: normal', () => {
+    const project = 'chromium';
+    element.projectName = project;
+    element.localIdsStr = '1,2,3';
+    assert.deepEqual(element.issueRefs, [
+      {projectName: project, localId: '1'},
+      {projectName: project, localId: '2'},
+      {projectName: project, localId: '3'},
+    ]);
+  });
+
+  it('fetchApprovals: applicable fields exist', async () => {
+    const responseFieldDefs = [
+      {fieldRef: {type: 'INT_TYPE'}},
+      {fieldRef: {type: 'APPROVAL_TYPE'}},
+      {fieldRef: {type: 'APPROVAL_TYPE'}},
+    ];
+    const promise = Promise.resolve({fieldDefs: responseFieldDefs});
+    prpcClient.call.returns(promise);
+
+    sinon.spy(element, 'fetchApprovals');
+
+    await element.updateComplete;
+
+    element.querySelector('.js-showApprovals').click();
+    assert.isTrue(element.fetchApprovals.calledOnce);
+
+    // Wait for promise in fetchApprovals to resolve.
+    await promise;
+
+    assert.deepEqual([
+      {fieldRef: {type: 'APPROVAL_TYPE'}},
+      {fieldRef: {type: 'APPROVAL_TYPE'}},
+    ], element.approvals);
+    assert.equal(null, element.errorMessage);
+  });
+
+  it('fetchApprovals: applicable fields dont exist', async () => {
+    const promise = Promise.resolve({fieldDefs: []});
+    prpcClient.call.returns(promise);
+
+    await element.updateComplete;
+
+    element.querySelector('.js-showApprovals').click();
+
+    await promise;
+
+    assert.equal(element.approvals.length, 0);
+    assert.equal(NO_APPROVALS_MESSAGE, element.errorMessage);
+  });
+
+  it('save: normal', async () => {
+    const promise =
+      Promise.resolve({issueRefs: [{localId: '1'}, {localId: '3'}]});
+    prpcClient.call.returns(promise);
+    const fieldDefs = [
+      {fieldRef: {fieldName: 'Approval-One', type: 'APPROVAL_TYPE'}},
+      {fieldRef: {fieldName: 'Approval-Two', type: 'APPROVAL_TYPE'}},
+    ];
+    element.approvals = fieldDefs;
+    element.projectName = 'chromium';
+    element.localIdsStr = '1,2,3';
+
+    await element.updateComplete;
+
+    fireEvent.change(element.querySelector('#commentText'), {target: {value: 'comment'}});
+    fireEvent.change(element.querySelector('#statusInput'), {target: {value: 'NotApproved'}});
+    element.querySelector('.js-save').click();
+
+    // Wait for promise in save() to resolve.
+    await promise;
+    await element.updateComplete;
+
+    // Assert messages correct
+    assert.equal(
+        true,
+        element.responseMessage.includes(
+            'Updated Approval-One in issues: 1, 3 (2 of 3).'));
+    assert.equal('', element.errorMessage);
+
+    // Assert all inputs not disabled.
+    element.querySelectorAll('input, textarea, select').forEach((input) => {
+      assert.equal(input.disabled, false);
+    });
+
+    // Assert all inputs cleared.
+    element.querySelectorAll('input, textarea').forEach((input) => {
+      assert.equal(input.value, '');
+    });
+    element.querySelectorAll('select').forEach((select) => {
+      assert.equal(select.selectedIndex, 0);
+    });
+
+    // Assert BulkUpdateApprovals correctly called.
+    const expectedMessage = {
+      approvalDelta: {status: 'NOT_APPROVED'},
+      commentContent: 'comment',
+      fieldRef: fieldDefs[0].fieldRef,
+      issueRefs: element.issueRefs,
+      send_email: true,
+    };
+    sinon.assert.calledWith(
+        prpcClient.call,
+        'monorail.Issues',
+        'BulkUpdateApprovals',
+        expectedMessage);
+  });
+
+  it('save: no updates', async () => {
+    const promise = Promise.resolve({issueRefs: []});
+    prpcClient.call.returns(promise);
+    const fieldDefs = [
+      {fieldRef: {fieldName: 'Approval-One', type: 'APPROVAL_TYPE'}},
+      {fieldRef: {fieldName: 'Approval-Two', type: 'APPROVAL_TYPE'}},
+    ];
+    element.approvals = fieldDefs;
+    element.projectName = 'chromium';
+    element.localIdsStr = '1,2,3';
+
+    await element.updateComplete;
+
+    element.querySelector('#commentText').value = 'comment';
+    element.querySelector('#statusInput').value = 'NotApproved';
+    element.querySelector('.js-save').click();
+
+    // Wait for promise in save() to resolve
+    await promise;
+
+    // Assert messages correct.
+    assert.equal('', element.responseMessage);
+    assert.equal(NO_UPDATES_MESSAGE, element.errorMessage);
+
+    // Assert inputs not cleared.
+    assert.equal(element.querySelector('#commentText').value, 'comment');
+    assert.equal(element.querySelector('#statusInput').value, 'NotApproved');
+
+    // Assert inputs not disabled.
+    element.querySelectorAll('input, textarea, select').forEach((input) => {
+      assert.equal(input.disabled, false);
+    });
+  });
+});
diff --git a/static_src/elements/framework/dialogs/mr-change-columns/mr-change-columns.js b/static_src/elements/framework/dialogs/mr-change-columns/mr-change-columns.js
new file mode 100644
index 0000000..a7870f6
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-change-columns/mr-change-columns.js
@@ -0,0 +1,151 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import page from 'page';
+import qs from 'qs';
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {parseColSpec} from 'shared/issue-fields.js';
+
+/**
+ * `<mr-change-columns>`
+ *
+ * Dialog where the user can change columns on the list view.
+ *
+ */
+export class MrChangeColumns extends LitElement {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        .edit-actions {
+          margin: 0.5em 0;
+          text-align: right;
+        }
+        .input-grid {
+          align-items: center;
+          width: 800px;
+          max-width: 100%;
+        }
+        input {
+          box-sizing: border-box;
+          padding: 0.25em 4px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <chops-dialog closeOnOutsideClick>
+        <h3 class="medium-heading">Change list columns</h3>
+        <form id="changeColumns" @submit=${this._save}>
+          <div class="input-grid">
+            <label for="columnsInput">Columns: </label>
+            <input
+              id="columnsInput"
+              placeholder="Edit columns..."
+              value=${this.columns.join(' ')}
+            />
+          </div>
+          <div class="edit-actions">
+            <chops-button
+              @click=${this.close}
+              class="de-emphasized discard-button"
+            >
+              Discard
+            </chops-button>
+            <chops-button
+              @click=${this._save}
+              class="emphasized"
+            >
+              Update columns
+            </chops-button>
+          </div>
+        </form>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Array of the currently configured issue columns, used to set
+       * the default value.
+       */
+      columns: {type: Array},
+      /**
+       * Parsed query params for the current page, to be used in
+       * navigation.
+       */
+      queryParams: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.columns = [];
+    this.queryParams = {};
+
+    this._page = page;
+  }
+
+  /**
+   * Abstract out the computation of the current page. Useful for testing.
+   */
+  get _currentPage() {
+    return window.location.pathname;
+  }
+
+  /** Updates the URL query params with the new columns. */
+  save() {
+    const input = this.shadowRoot.querySelector('#columnsInput');
+    const newColumns = parseColSpec(input.value);
+
+    const params = {...this.queryParams};
+    params.colspec = newColumns.join('+');
+
+    // TODO(zhangtiff): Create a shared function to change only
+    // query params in a URL.
+    this._page(`${this._currentPage}?${qs.stringify(params)}`);
+
+    this.close();
+  }
+
+  /**
+   * Handles form submit events.
+   * @param {Event} e A click or submit event.
+   */
+  _save(e) {
+    e.preventDefault();
+    this.save();
+  }
+
+  /** Opens and resets this dialog. */
+  open() {
+    this.reset();
+    const dialog = this.shadowRoot.querySelector('chops-dialog');
+    dialog.open();
+  }
+
+  /** Closes this dialog. */
+  close() {
+    const dialog = this.shadowRoot.querySelector('chops-dialog');
+    dialog.close();
+  }
+
+  /** Resets the form in this dialog. */
+  reset() {
+    this.shadowRoot.querySelector('form').reset();
+  }
+}
+
+customElements.define('mr-change-columns', MrChangeColumns);
diff --git a/static_src/elements/framework/dialogs/mr-change-columns/mr-change-columns.test.js b/static_src/elements/framework/dialogs/mr-change-columns/mr-change-columns.test.js
new file mode 100644
index 0000000..82e529d
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-change-columns/mr-change-columns.test.js
@@ -0,0 +1,75 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrChangeColumns} from './mr-change-columns.js';
+
+
+let element;
+
+describe('mr-change-columns', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-change-columns');
+    document.body.appendChild(element);
+
+    element._page = sinon.stub();
+    sinon.stub(element, '_currentPage').get(() => '/test');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrChangeColumns);
+  });
+
+  it('input initializes with currently set columns', async () => {
+    element.columns = ['ID', 'Summary'];
+
+    await element.updateComplete;
+
+    const input = element.shadowRoot.querySelector('#columnsInput');
+
+    assert.equal(input.value, 'ID Summary');
+  });
+
+  it('editing input and saving updates columns in URL', async () => {
+    element.columns = ['ID', 'Summary'];
+    element.queryParams = {};
+
+    await element.updateComplete;
+
+    const input = element.shadowRoot.querySelector('#columnsInput');
+    input.value = 'ID Summary Owner';
+
+    element.save();
+
+    sinon.assert.calledWith(element._page,
+        '/test?colspec=ID%2BSummary%2BOwner');
+  });
+
+  it('submitting form updates colspec', async () => {
+    element.columns = ['ID', 'Summary'];
+    element.queryParams = {};
+
+    await element.updateComplete;
+
+    const input = element.shadowRoot.querySelector('#columnsInput');
+    input.value = 'ID Summary Component';
+
+    // Note: HTMLFormElement.submit() does not fire event listeners.
+    const submitEvent = new Event('submit');
+    sinon.spy(submitEvent, 'preventDefault');
+    const form = element.shadowRoot.querySelector('form');
+    form.dispatchEvent(submitEvent);
+
+    // Preventing default is important to prevent native browser form submit
+    // from causing an additional navigation.
+    sinon.assert.calledOnce(submitEvent.preventDefault);
+
+    sinon.assert.calledWith(element._page,
+        '/test?colspec=ID%2BSummary%2BComponent');
+  });
+});
diff --git a/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-issue-hotlists-dialog.js b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-issue-hotlists-dialog.js
new file mode 100644
index 0000000..54565cf
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-issue-hotlists-dialog.js
@@ -0,0 +1,233 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import * as userV0 from 'reducers/userV0.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {connectStore} from 'reducers/base.js';
+
+/**
+ * `<mr-issue-hotlists-dialog>`
+ *
+ * The base dialog that <mr-move-issue-hotlists-dialog> and
+ * <mr-update-issue-hotlists-dialog> inherits common methods and behaviors from.
+ * <mr-update-issue-hotlists-dialog> is used across multiple pages where as
+ * <mr-move-issue-hotlists-dialog> is largely used within Hotlists.
+ *
+ * Important: The `render` method should be overridden by child classes.
+ */
+export class MrIssueHotlistsDialog extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          font-size: var(--chops-main-font-size);
+          --chops-dialog-max-width: 500px;
+        }
+        .error {
+          max-width: 100%;
+          color: red;
+          margin-bottom: 1px;
+        }
+        select,
+        input {
+          box-sizing: border-box;
+          width: var(--mr-edit-field-width);
+          padding: var(--mr-edit-field-padding);
+          font-size: var(--chops-main-font-size);
+        }
+        input#filter {
+          margin-top: 4px;
+          width: 85%;
+          max-width: 240px;
+        }
+        .user-hotlists {
+          max-height: 240px;
+          overflow: auto;
+        }
+        .hotlist.filter-fail {
+          display: none;
+        }
+        i.material-icons {
+          font-size: 20px;
+          margin-right: 4px;
+          vertical-align: bottom;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+    <chops-dialog closeOnOutsideClick>
+      ${this.renderHeader()}
+      ${this.renderContent()}
+    </chops-dialog>
+    `;
+  }
+
+  /**
+   * Renders the dialog header.
+   * @return {TemplateResult}
+   */
+  renderHeader() {
+    return html`
+      <h3 class="medium-heading">Dialog elements below:</h3>
+    `;
+  }
+
+  /**
+   * Renders the dialog content.
+   * @return {TemplateResult}
+   */
+  renderContent() {
+    return html`
+      ${this.renderFilter()}
+      ${this.renderHotlists()}
+      ${this.renderError()}
+    `;
+  }
+
+  /**
+   * Renders the Hotlist filter.
+   * @return {TemplateResult}
+   */
+  renderFilter() {
+    return html`
+      <input id="filter" type="text" @keyup=${this.filterHotlists}>
+      <i class="material-icons">search</i>
+    `;
+  }
+
+  /**
+   * Renders the user's Hotlists.
+   * @return {TemplateResult}
+   */
+  renderHotlists() {
+    return html`
+      <div class="user-hotlists">
+        ${this.filteredHotlists.length ?
+          this.filteredHotlists.map(this.renderFilteredHotlist, this) : ''}
+      </div>
+    `;
+  }
+
+  /**
+   * Renders a user's filtered Hotlist.
+   * @param {HotlistV0} hotlist The user Hotlist to render.
+   * @return {TemplateResult}
+   */
+  renderFilteredHotlist(hotlist) {
+    return html`
+      <div
+        class="hotlist"
+        data-hotlist-name="${hotlist.name}"
+      >
+        ${hotlist.name}
+      </div>`;
+  }
+
+  /**
+   * Renders dialog error.
+   * @return {TemplateResult}
+   */
+  renderError() {
+    return html`
+      <br>
+      ${this.error ? html`
+        <div class="error">${this.error}</div>
+      `: ''}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      // Populated from Redux.
+      userHotlists: {type: Array},
+      filteredHotlists: {type: Array},
+      issueRefs: {type: Array},
+      error: {type: String},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.userHotlists = userV0.currentUser(state).hotlists;
+    // TODO(https://crbug.com/monorail/7778): Switch to users.js and use V3 API
+    // to make a call to GatherHotlistsForUser.
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /** @type {Array} */
+    this.userHotlists = [];
+
+    /** @type {Array} */
+    this.filteredHotlists = this.userHotlists;
+
+    /** @type {Array<IssueRef>} */
+    this.issueRefs = [];
+
+    /** @type {string} */
+    this.error = '';
+  }
+
+  /**
+   * Opens the dialog.
+   */
+  open() {
+    this.reset();
+    this.shadowRoot.querySelector('chops-dialog').open();
+  }
+
+  /**
+   * Resets any changes to the form and error.
+   */
+  reset() {
+    this.error = '';
+    const filter = this.shadowRoot.querySelector('#filter');
+    filter.value = '';
+    this.filterHotlists();
+  }
+
+  /**
+   * Closes the dialog.
+   */
+  close() {
+    this.shadowRoot.querySelector('chops-dialog').close();
+  }
+
+  /**
+   * Filters the visible Hotlists with the given user input.
+   * Requires filter to be an input element with its id as "filter".
+   */
+  filterHotlists() {
+    const input = this.shadowRoot.querySelector('#filter');
+    if (!input) {
+      // Short circuit because there's no filter.
+      this.filteredHotlists = this.userHotlists;
+    } else {
+      const filter = input.value.toLowerCase();
+      const visibleHotlists = [];
+      this.userHotlists.forEach((hotlist) => {
+        const hotlistName = hotlist.name.toLowerCase();
+        if (hotlistName.includes(filter)) {
+          visibleHotlists.push(hotlist);
+        }
+      });
+      this.filteredHotlists = visibleHotlists;
+    }
+  }
+}
+
+customElements.define('mr-issue-hotlists-dialog', MrIssueHotlistsDialog);
diff --git a/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-issue-hotlists-dialog.test.js b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-issue-hotlists-dialog.test.js
new file mode 100644
index 0000000..911c1a0
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-issue-hotlists-dialog.test.js
@@ -0,0 +1,78 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueHotlistsDialog} from './mr-issue-hotlists-dialog.js';
+
+let element;
+const EXAMPLE_USER_HOTLISTS = [
+  {name: 'Hotlist-1'},
+  {name: 'Hotlist-2'},
+  {name: 'ac-apple-1'},
+  {name: 'ac-frita-1'},
+];
+
+describe('mr-issue-hotlists-dialog', () => {
+  beforeEach(async () => {
+    element = document.createElement('mr-issue-hotlists-dialog');
+    document.body.appendChild(element);
+
+    await element.updateComplete;
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueHotlistsDialog);
+    assert.include(element.shadowRoot.innerHTML, 'Dialog elements below');
+  });
+
+  it('filters hotlists', async () => {
+    element.userHotlists = EXAMPLE_USER_HOTLISTS;
+    element.open();
+    await element.updateComplete;
+
+    const initialHotlists = element.shadowRoot.querySelectorAll('.hotlist');
+    assert.equal(initialHotlists.length, 4);
+    const filterInput = element.shadowRoot.querySelector('#filter');
+    filterInput.value = 'list';
+    element.filterHotlists();
+    await element.updateComplete;
+    let visibleHotlists =
+        element.shadowRoot.querySelectorAll('.hotlist');
+    assert.equal(visibleHotlists.length, 2);
+
+    filterInput.value = '2';
+    element.filterHotlists();
+    await element.updateComplete;
+    visibleHotlists =
+        element.shadowRoot.querySelectorAll('.hotlist');
+    assert.equal(visibleHotlists.length, 1);
+  });
+
+  it('resets filter on open', async () => {
+    element.userHotlists = EXAMPLE_USER_HOTLISTS;
+    element.open();
+    await element.updateComplete;
+
+    const filterInput = element.shadowRoot.querySelector('#filter');
+    filterInput.value = 'ac';
+    element.filterHotlists();
+    await element.updateComplete;
+    let visibleHotlists =
+        element.shadowRoot.querySelectorAll('.hotlist');
+    assert.equal(visibleHotlists.length, 2);
+
+    element.close();
+    element.open();
+    await element.updateComplete;
+
+    assert.equal(filterInput.value, '');
+    visibleHotlists =
+        element.shadowRoot.querySelectorAll('.hotlist');
+    assert.equal(visibleHotlists.length, 4);
+  });
+});
diff --git a/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.js b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.js
new file mode 100644
index 0000000..e7c1cd3
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.js
@@ -0,0 +1,141 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {html, css} from 'lit-element';
+
+import 'elements/framework/mr-warning/mr-warning.js';
+import {hotlists} from 'reducers/hotlists.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import {MrIssueHotlistsDialog} from './mr-issue-hotlists-dialog';
+
+/**
+ * `<mr-move-issue-hotlists-dialog>`
+ *
+ * Displays a dialog to select the Hotlist to move the provided Issues.
+ */
+export class MrMoveIssueDialog extends MrIssueHotlistsDialog {
+  /** @override */
+  static get styles() {
+    return [
+      super.styles,
+      css`
+        .hotlist {
+          padding: 4px;
+        }
+        .hotlist:hover {
+          background: var(--chops-active-choice-bg);
+          cursor: pointer;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  renderHeader() {
+    const warningText =
+        `Moving issues will remove them from ${this._viewedHotlist ?
+          this._viewedHotlist.displayName : 'this hotlist'}.`;
+    return html`
+      <h3 class="medium-heading">Move issues to hotlist</h3>
+      <mr-warning title=${warningText}>${warningText}</mr-warning>
+    `;
+  }
+
+  /** @override */
+  renderFilteredHotlist(hotlist) {
+    if (this._viewedHotlist &&
+      hotlist.name === this._viewedHotlist.displayName) return;
+    return html`
+      <div
+        class="hotlist"
+        data-hotlist-name="${hotlist.name}"
+        @click=${this._targetHotlistPicked}>
+        ${hotlist.name}
+      </div>`;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      ...MrIssueHotlistsDialog.properties,
+      // Populated from Redux.
+      _viewedHotlist: {type: Object},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    super.stateChanged(state);
+    this._viewedHotlist = hotlists.viewedHotlist(state);
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /**
+     * The currently viewed Hotlist.
+     * @type {?Hotlist}
+     **/
+    this._viewedHotlist = null;
+  }
+
+  /**
+   * Handles picking a Hotlist to move to.
+   * @param {Event} e
+   */
+  async _targetHotlistPicked(e) {
+    const targetHotlistName = e.target.dataset.hotlistName;
+    const changes = {
+      added: [],
+      removed: [],
+    };
+
+    for (const hotlist of this.userHotlists) {
+      // We move from the current Hotlist to the target Hotlist.
+      if (changes.added.length === 1 && changes.removed.length === 1) break;
+      const change = {
+        name: hotlist.name,
+        owner: hotlist.ownerRef,
+      };
+      if (hotlist.name === targetHotlistName) {
+        changes.added.push(change);
+      } else if (hotlist.name === this._viewedHotlist.displayName) {
+        changes.removed.push(change);
+      }
+    }
+
+    const issueRefs = this.issueRefs;
+    if (!issueRefs) return;
+
+    // TODO(https://crbug.com/monorail/7778): Use action creators.
+    const promises = [];
+    if (changes.added && changes.added.length) {
+      promises.push(prpcClient.call(
+          'monorail.Features', 'AddIssuesToHotlists', {
+            hotlistRefs: changes.added,
+            issueRefs,
+          },
+      ));
+    }
+    if (changes.removed && changes.removed.length) {
+      promises.push(prpcClient.call(
+          'monorail.Features', 'RemoveIssuesFromHotlists', {
+            hotlistRefs: changes.removed,
+            issueRefs,
+          },
+      ));
+    }
+
+    try {
+      await Promise.all(promises);
+      this.dispatchEvent(new Event('saveSuccess'));
+      this.close();
+    } catch (error) {
+      this.error = error.message || error.description;
+    }
+  }
+}
+
+customElements.define('mr-move-issue-hotlists-dialog', MrMoveIssueDialog);
diff --git a/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.test.js b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.test.js
new file mode 100644
index 0000000..7a2dd5c
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.test.js
@@ -0,0 +1,105 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrMoveIssueDialog} from './mr-move-issue-hotlists-dialog.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import * as example from 'shared/test/constants-hotlists.js';
+
+let element;
+let waitForPromises;
+
+describe('mr-move-issue-hotlists-dialog', () => {
+  beforeEach(async () => {
+    element = document.createElement('mr-move-issue-hotlists-dialog');
+    document.body.appendChild(element);
+
+    // We need to wait for promisees to resolve. Alone, the updateComplete
+    // returns without allowing our Promise.all to resolve.
+    waitForPromises = async () => element.updateComplete;
+
+    element.userHotlists = [
+      {name: 'Hotlist-1', ownerRef: {userId: 67890}},
+      {name: 'Hotlist-2', ownerRef: {userId: 67890}},
+      {name: 'Hotlist-3', ownerRef: {userId: 67890}},
+      {name: example.HOTLIST.displayName, ownerRef: {userId: 67890}},
+    ];
+    element.user = {userId: 67890};
+    element.issueRefs = [{localId: 22, projectName: 'test'}];
+    element._viewedHotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    sinon.stub(prpcClient, 'call');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    prpcClient.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrMoveIssueDialog);
+  });
+
+  it('clicking a hotlist moves the issue', async () => {
+    element.open();
+    await element.updateComplete;
+
+    const targetHotlist =element.shadowRoot.querySelector(
+        '.hotlist[data-hotlist-name="Hotlist-2"]');
+    assert.isNotNull(targetHotlist);
+    targetHotlist.click();
+    await element.updateComplete;
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Features',
+        'AddIssuesToHotlists', {
+          hotlistRefs: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+          issueRefs: [{localId: 22, projectName: 'test'}],
+        });
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Features',
+        'RemoveIssuesFromHotlists', {
+          hotlistRefs: [{
+            name: example.HOTLIST.displayName,
+            owner: {userId: 67890},
+          }],
+          issueRefs: [{localId: 22, projectName: 'test'}],
+        });
+  });
+
+  it('dispatches event upon successfully moving', async () => {
+    element.open();
+    const savedStub = sinon.stub();
+    element.addEventListener('saveSuccess', savedStub);
+    sinon.stub(element, 'close');
+    await element.updateComplete;
+
+    const targetHotlist =element.shadowRoot.querySelector(
+        '.hotlist[data-hotlist-name="Hotlist-2"]');
+    targetHotlist.click();
+
+    await waitForPromises();
+    sinon.assert.calledOnce(savedStub);
+    sinon.assert.calledOnce(element.close);
+  });
+
+  it('dispatches no event upon error saving', async () => {
+    const mistakes = 'Mistakes were made';
+    const error = new Error(mistakes);
+    prpcClient.call.returns(Promise.reject(error));
+    const savedStub = sinon.stub();
+    element.addEventListener('saveSuccess', savedStub);
+    element.open();
+    await element.updateComplete;
+
+    const targetHotlist =element.shadowRoot.querySelector(
+        '.hotlist[data-hotlist-name="Hotlist-2"]');
+    targetHotlist.click();
+
+    await waitForPromises();
+    sinon.assert.notCalled(savedStub);
+    assert.include(element.shadowRoot.innerHTML, mistakes);
+  });
+});
diff --git a/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.js b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.js
new file mode 100644
index 0000000..08a8b25
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.js
@@ -0,0 +1,340 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {html, css} from 'lit-element';
+import deepEqual from 'deep-equal';
+
+import 'elements/chops/chops-checkbox/chops-checkbox.js';
+import {store} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import {MrIssueHotlistsDialog} from './mr-issue-hotlists-dialog';
+
+/**
+ * `<mr-update-issue-hotlists-dialog>`
+ *
+ * Displays a dialog with the current hotlists's issues allowing the user to
+ * update which hotlists the issues are a member of.
+ */
+export class MrUpdateIssueDialog extends MrIssueHotlistsDialog {
+  /** @override */
+  static get styles() {
+    return [
+      ...super.styles,
+      css`
+        input[type="checkbox"] {
+          width: auto;
+          height: auto;
+        }
+        button.toggle {
+          background: none;
+          color: hsl(240, 100%, 40%);
+          border: 0;
+          width: 100%;
+          padding: 0.25em 0;
+          text-align: left;
+        }
+        button.toggle:hover {
+          cursor: pointer;
+          text-decoration: underline;
+        }
+        label, chops-checkbox {
+          display: flex;
+          line-height: 200%;
+          align-items: center;
+          width: 100%;
+          text-align: left;
+          font-weight: normal;
+          padding: 0.25em 8px;
+          box-sizing: border-box;
+        }
+        label input[type="checkbox"] {
+          margin-right: 8px;
+        }
+        .discard-button {
+          margin-right: 16px;
+        }
+        .edit-actions {
+          width: 100%;
+          margin: 0.5em 0;
+          text-align: right;
+        }
+        .input-grid {
+          align-items: center;
+        }
+        .input-grid > input {
+          width: 200px;
+          max-width: 100%;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  renderHeader() {
+    return html`
+      <h3 class="medium-heading">Add issue to hotlists</h3>
+    `;
+  }
+
+  /** @override */
+  renderContent() {
+    return html`
+      ${this.renderFilter()}
+      <form id="issueHotlistsForm">
+        ${this.renderHotlists()}
+        <h3 class="medium-heading">Create new hotlist</h3>
+        <div class="input-grid">
+          <label for="newHotlistName">New hotlist name:</label>
+          <input type="text" name="newHotlistName">
+        </div>
+        ${this.renderError()}
+        <div class="edit-actions">
+          <chops-button
+            class="de-emphasized discard-button"
+            ?disabled=${this.disabled}
+            @click=${this.discard}
+          >
+            Discard
+          </chops-button>
+          <chops-button
+            class="emphasized"
+            ?disabled=${this.disabled}
+            @click=${this.save}
+          >
+            Save changes
+          </chops-button>
+        </div>
+      </form>
+    `;
+  }
+
+  /** @override */
+  renderFilteredHotlist(hotlist) {
+    return html`
+      <chops-checkbox
+        class="hotlist"
+        title=${this._checkboxTitle(hotlist, this.issueHotlists)}
+        data-hotlist-name="${hotlist.name}"
+        ?checked=${this.hotlistsToAdd.has(hotlist.name)}
+        @checked-change=${this._targetHotlistChecked}
+      >
+        ${hotlist.name}
+      </chops-checkbox>`;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      ...super.properties,
+      viewedIssueRef: {type: Object},
+      issueHotlists: {type: Array},
+      user: {type: Object},
+      hotlistsToAdd: {
+        type: Object,
+        hasChanged(newVal, oldVal) {
+          return !deepEqual(newVal, oldVal);
+        },
+      },
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    super.stateChanged(state);
+    this.viewedIssueRef = issueV0.viewedIssueRef(state);
+    this.user = userV0.currentUser(state);
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /** The list of Hotlists attached to the issueRefs. */
+    this.issueHotlists = [];
+
+    /** The Set of Hotlist names that the Issues will be added to. */
+    this.hotlistsToAdd = this._initializeHotlistsToAdd();
+  }
+
+  /** @override */
+  reset() {
+    const form = this.shadowRoot.querySelector('#issueHotlistsForm');
+    form.reset();
+    // LitElement's hasChanged needs an assignment to verify Set objects.
+    // https://lit-element.polymer-project.org/guide/properties#haschanged
+    this.hotlistsToAdd = this._initializeHotlistsToAdd();
+    super.reset();
+  }
+
+  /**
+   * An alias to the close method.
+   */
+  discard() {
+    this.close();
+  }
+
+  /**
+   * Saves all changes that were found in the dialog and issues async requests
+   * to update the issues.
+   * @fires Event#saveSuccess
+   */
+  async save() {
+    const changes = this.changes;
+    const issueRefs = this.issueRefs;
+    const viewedRef = this.viewedIssueRef;
+
+    if (!issueRefs || !changes) return;
+
+    // TODO(https://crbug.com/monorail/7778): Use action creators.
+    const promises = [];
+    if (changes.added && changes.added.length) {
+      promises.push(prpcClient.call(
+          'monorail.Features', 'AddIssuesToHotlists', {
+            hotlistRefs: changes.added,
+            issueRefs,
+          },
+      ));
+    }
+    if (changes.removed && changes.removed.length) {
+      promises.push(prpcClient.call(
+          'monorail.Features', 'RemoveIssuesFromHotlists', {
+            hotlistRefs: changes.removed,
+            issueRefs,
+          },
+      ));
+    }
+    if (changes.created) {
+      promises.push(prpcClient.call(
+          'monorail.Features', 'CreateHotlist', {
+            name: changes.created.name,
+            summary: changes.created.summary,
+            issueRefs,
+          },
+      ));
+    }
+
+    try {
+      await Promise.all(promises);
+
+      // Refresh the viewed issue's hotlists only if there is a viewed issue.
+      if (viewedRef) {
+        const viewedIssueWasUpdated = issueRefs.find((ref) =>
+          ref.projectName === viewedRef.projectName &&
+          ref.localId === viewedRef.localId);
+        if (viewedIssueWasUpdated) {
+          store.dispatch(issueV0.fetchHotlists(viewedRef));
+        }
+      }
+      store.dispatch(userV0.fetchHotlists({userId: this.user.userId}));
+      this.dispatchEvent(new Event('saveSuccess'));
+      this.close();
+    } catch (error) {
+      this.error = error.description;
+    }
+  }
+
+  /**
+   * Returns whether a given hotlist matches any of the given issue's hotlists.
+   * @param {Hotlist} hotlist Hotlist to look for.
+   * @param {Array<Hotlist>} issueHotlists Issue's hotlists to compare to.
+   * @return {boolean}
+   */
+  _issueInHotlist(hotlist, issueHotlists) {
+    return issueHotlists.some((issueHotlist) => {
+      // TODO(https://crbug.com/monorail/7451): use `===`.
+      return (hotlist.ownerRef.userId == issueHotlist.ownerRef.userId &&
+        hotlist.name === issueHotlist.name);
+    });
+  }
+
+  /**
+   * Get a Set of Hotlists to add the Issues to based on the
+   * Get the initial Set of Hotlists that Issues will be added to. Calculated
+   * using userHotlists and issueHotlists.
+   * @return {!Set<string>}
+   */
+  _initializeHotlistsToAdd() {
+    const userHotlistsInIssueHotlists = this.userHotlists.reduce(
+        (acc, hotlist) => {
+          if (this._issueInHotlist(hotlist, this.issueHotlists)) {
+            acc.push(hotlist.name);
+          }
+          return acc;
+        }, []);
+    return new Set(userHotlistsInIssueHotlists);
+  }
+
+  /**
+   * Gets the checkbox title, depending on the checked state.
+   * @param {boolean} isChecked Whether the input is checked.
+   * @return {string}
+   */
+  _getCheckboxTitle(isChecked) {
+    return (isChecked ? 'Remove issue from' : 'Add issue to') + ' this hotlist';
+  }
+
+  /**
+   * The checkbox title for the issue, shown on hover and for a11y.
+   * @param {Hotlist} hotlist Hotlist to look for.
+   * @param {Array<Hotlist>} issueHotlists Issue's hotlists to compare to.
+   * @return {string}
+   */
+  _checkboxTitle(hotlist, issueHotlists) {
+    return this._getCheckboxTitle(this._issueInHotlist(hotlist, issueHotlists));
+  }
+
+  /**
+   * Handles when the target Hotlist chops-checkbox has been checked.
+   * @param {Event} e
+   */
+  _targetHotlistChecked(e) {
+    const hotlistName = e.target.dataset.hotlistName;
+    const currentHotlistsToAdd = new Set(this.hotlistsToAdd);
+    if (hotlistName && e.detail.checked) {
+      currentHotlistsToAdd.add(hotlistName);
+    } else {
+      currentHotlistsToAdd.delete(hotlistName);
+    }
+    // LitElement's hasChanged needs an assignment to verify Set objects.
+    // https://lit-element.polymer-project.org/guide/properties#haschanged
+    this.hotlistsToAdd = currentHotlistsToAdd;
+    e.target.title = this._getCheckboxTitle(e.target.checked);
+  }
+
+  /**
+   * Gets the changes between the added, removed, and created hotlists .
+   */
+  get changes() {
+    const changes = {
+      added: [],
+      removed: [],
+    };
+    const form = this.shadowRoot.querySelector('#issueHotlistsForm');
+    this.userHotlists.forEach((hotlist) => {
+      const issueInHotlist = this._issueInHotlist(hotlist, this.issueHotlists);
+      if (issueInHotlist && !this.hotlistsToAdd.has(hotlist.name)) {
+        changes.removed.push({
+          name: hotlist.name,
+          owner: hotlist.ownerRef,
+        });
+      } else if (!issueInHotlist && this.hotlistsToAdd.has(hotlist.name)) {
+        changes.added.push({
+          name: hotlist.name,
+          owner: hotlist.ownerRef,
+        });
+      }
+    });
+    if (form.newHotlistName.value) {
+      changes.created = {
+        name: form.newHotlistName.value,
+        summary: 'Hotlist created from issue.',
+      };
+    }
+    return changes;
+  }
+}
+
+customElements.define('mr-update-issue-hotlists-dialog', MrUpdateIssueDialog);
diff --git a/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.test.js b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.test.js
new file mode 100644
index 0000000..954b8b9
--- /dev/null
+++ b/static_src/elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.test.js
@@ -0,0 +1,193 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrUpdateIssueDialog} from './mr-update-issue-hotlists-dialog.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+let element;
+let form;
+
+describe('mr-update-issue-hotlists-dialog', () => {
+  beforeEach(async () => {
+    element = document.createElement('mr-update-issue-hotlists-dialog');
+    document.body.appendChild(element);
+
+    await element.updateComplete;
+    form = element.shadowRoot.querySelector('#issueHotlistsForm');
+
+    sinon.stub(prpcClient, 'call');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    prpcClient.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrUpdateIssueDialog);
+  });
+
+  it('no changes', () => {
+    assert.deepEqual(element.changes, {added: [], removed: []});
+  });
+
+  it('clicking on issues produces changes', async () => {
+    element.issueHotlists = [
+      {name: 'Hotlist-1', ownerRef: {userId: 12345}},
+      {name: 'Hotlist-2', ownerRef: {userId: 12345}},
+      {name: 'Hotlist-1', ownerRef: {userId: 67890}},
+    ];
+    element.userHotlists = [
+      {name: 'Hotlist-1', ownerRef: {userId: 67890}},
+      {name: 'Hotlist-2', ownerRef: {userId: 67890}},
+    ];
+    element.user = {userId: 67890};
+
+    element.open();
+    await element.updateComplete;
+
+    const chopsCheckboxes = form.querySelectorAll('chops-checkbox');
+    chopsCheckboxes[0].click();
+    chopsCheckboxes[1].click();
+    assert.deepEqual(element.changes, {
+      added: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+      removed: [{name: 'Hotlist-1', owner: {userId: 67890}}],
+    });
+  });
+
+  it('adding new hotlist produces changes', async () => {
+    await element.updateComplete;
+    form.newHotlistName.value = 'New-Hotlist';
+    assert.deepEqual(element.changes, {
+      added: [],
+      removed: [],
+      created: {
+        name: 'New-Hotlist',
+        summary: 'Hotlist created from issue.',
+      },
+    });
+  });
+
+  it('reset changes', async () => {
+    element.issueHotlists = [
+      {name: 'Hotlist-1', ownerRef: {userId: 12345}},
+      {name: 'Hotlist-2', ownerRef: {userId: 12345}},
+      {name: 'Hotlist-1', ownerRef: {userId: 67890}},
+    ];
+    element.userHotlists = [
+      {name: 'Hotlist-1', ownerRef: {userId: 67890}},
+      {name: 'Hotlist-2', ownerRef: {userId: 67890}},
+    ];
+    element.user = {userId: 67890};
+
+    element.open();
+    await element.updateComplete;
+
+    const chopsCheckboxes = form.querySelectorAll('chops-checkbox');
+    const checkbox1 = chopsCheckboxes[0];
+    const checkbox2 = chopsCheckboxes[1];
+    checkbox1.click();
+    checkbox2.click();
+    form.newHotlisName = 'New-Hotlist';
+    await element.reset();
+    assert.isTrue(checkbox1.checked);
+    assert.isNotTrue(checkbox2.checked); // Falsey property.
+    assert.equal(form.newHotlistName.value, '');
+  });
+
+  it('saving adds issues to hotlist', async () => {
+    sinon.stub(element, 'changes').get(() => ({
+      added: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+    }));
+    element.issueRefs = [{localId: 22, projectName: 'test'}];
+
+    await element.save();
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Features',
+        'AddIssuesToHotlists', {
+          hotlistRefs: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+          issueRefs: [{localId: 22, projectName: 'test'}],
+        });
+  });
+
+  it('saving removes issues from hotlist', async () => {
+    sinon.stub(element, 'changes').get(() => ({
+      removed: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+    }));
+    element.issueRefs = [{localId: 22, projectName: 'test'}];
+
+    await element.save();
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Features',
+        'RemoveIssuesFromHotlists', {
+          hotlistRefs: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+          issueRefs: [{localId: 22, projectName: 'test'}],
+        });
+  });
+
+  it('saving creates new hotlist with issues', async () => {
+    sinon.stub(element, 'changes').get(() => ({
+      created: {name: 'MyHotlist', summary: 'the best hotlist'},
+    }));
+    element.issueRefs = [{localId: 22, projectName: 'test'}];
+
+    await element.save();
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Features',
+        'CreateHotlist', {
+          name: 'MyHotlist',
+          summary: 'the best hotlist',
+          issueRefs: [{localId: 22, projectName: 'test'}],
+        });
+  });
+
+  it('saving refreshes issue hotlises if viewed issue is updated', async () => {
+    sinon.stub(element, 'changes').get(() => ({
+      created: {name: 'MyHotlist', summary: 'the best hotlist'},
+    }));
+    element.issueRefs = [
+      {localId: 22, projectName: 'test'},
+      {localId: 32, projectName: 'test'},
+    ];
+    element.viewedIssueRef = {localId: 32, projectName: 'test'};
+
+    await element.save();
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Features',
+        'ListHotlistsByIssue', {issue: {localId: 32, projectName: 'test'}});
+  });
+
+  it('dispatches event upon successfully saving', async () => {
+    sinon.stub(element, 'changes').get(() => ({
+      added: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+    }));
+    element.issueRefs = [{localId: 22, projectName: 'test'}];
+
+    const savedStub = sinon.stub();
+    element.addEventListener('saveSuccess', savedStub);
+
+    await element.save();
+
+    sinon.assert.calledOnce(savedStub);
+  });
+
+  it('dispatches no event upon error saving', async () => {
+    sinon.stub(element, 'changes').get(() => ({
+      added: [{name: 'Hotlist-2', owner: {userId: 67890}}],
+    }));
+    element.issueRefs = [{localId: 22, projectName: 'test'}];
+
+    const error = new Error('Mistakes were made');
+    prpcClient.call.returns(Promise.reject(error));
+
+    const savedStub = sinon.stub();
+    element.addEventListener('saveSuccess', savedStub);
+
+    await element.save();
+
+    sinon.assert.notCalled(savedStub);
+  });
+});
diff --git a/static_src/elements/framework/links/mr-crbug-link/mr-crbug-link.js b/static_src/elements/framework/links/mr-crbug-link/mr-crbug-link.js
new file mode 100644
index 0000000..690bd6a
--- /dev/null
+++ b/static_src/elements/framework/links/mr-crbug-link/mr-crbug-link.js
@@ -0,0 +1,87 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<mr-crbug-link>`
+ *
+ * Displays a crbug short-link to an issue.
+ *
+ */
+export class MrCrbugLink extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+         /**
+         * CSS variables provided to allow conditionally hiding <mr-crbug-link>
+         * in a way that's screenreader friendly.
+         */
+        --mr-crbug-link-opacity: 1;
+        --mr-crbug-link-opacity-focused: 1;
+      }
+      a.material-icons {
+        font-size: var(--chops-icon-font-size);
+        display: inline-block;
+        color: var(--chops-primary-icon-color);
+        padding: 0 2px;
+        box-sizing: border-box;
+        text-decoration: none;
+        vertical-align: middle;
+      }
+      a {
+        opacity: var(--mr-crbug-link-opacity);
+      }
+      a:focus {
+        opacity: var(--mr-crbug-link-opacity-focused);
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <a
+        id="bugLink"
+        class="material-icons"
+        href=${this._issueUrl}
+        title="crbug link"
+      >link</a>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * The issue being viewed. Falls back gracefully if this is only a ref.
+       */
+      issue: {type: Object},
+    };
+  }
+
+  /**
+   * Computes the URL to render in the shortlink.
+   * @return {string}
+   */
+  get _issueUrl() {
+    const issue = this.issue;
+    if (!issue) return '';
+    if (this._getHost() === 'bugs.chromium.org') {
+      const projectPart = (
+        issue.projectName == 'chromium' ? '' : issue.projectName + '/');
+      return `https://crbug.com/${projectPart}${issue.localId}`;
+    }
+    const issueType = issue.approvalValues ? 'approval' : 'detail';
+    return `/p/${issue.projectName}/issues/${issueType}?id=${issue.localId}`;
+  }
+
+  _getHost() {
+    // This function allows us to mock the host in unit testing.
+    return document.location.host;
+  }
+}
+customElements.define('mr-crbug-link', MrCrbugLink);
diff --git a/static_src/elements/framework/links/mr-crbug-link/mr-crbug-link.test.js b/static_src/elements/framework/links/mr-crbug-link/mr-crbug-link.test.js
new file mode 100644
index 0000000..aa7f21f
--- /dev/null
+++ b/static_src/elements/framework/links/mr-crbug-link/mr-crbug-link.test.js
@@ -0,0 +1,62 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrCrbugLink} from './mr-crbug-link.js';
+
+
+let element;
+
+describe('mr-crbug-link', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-crbug-link');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrCrbugLink);
+  });
+
+  it('In prod, link to crbug.com with project name specified', async () => {
+    element._getHost = () => 'bugs.chromium.org';
+    element.issue = {
+      projectName: 'test',
+      localId: 11,
+    };
+
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.equal(link.href, 'https://crbug.com/test/11');
+  });
+
+  it('In prod, link to crbug.com with implicit project name', async () => {
+    element._getHost = () => 'bugs.chromium.org';
+    element.issue = {
+      projectName: 'chromium',
+      localId: 11,
+    };
+
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.equal(link.href, 'https://crbug.com/11');
+  });
+
+  it('does not redirects to approval page for regular issues', async () => {
+    element.issue = {
+      projectName: 'test',
+      localId: 11,
+    };
+
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.include(link.href.trim(), '/p/test/issues/detail?id=11');
+  });
+});
diff --git a/static_src/elements/framework/links/mr-hotlist-link/mr-hotlist-link.js b/static_src/elements/framework/links/mr-hotlist-link/mr-hotlist-link.js
new file mode 100644
index 0000000..1f8b01a
--- /dev/null
+++ b/static_src/elements/framework/links/mr-hotlist-link/mr-hotlist-link.js
@@ -0,0 +1,39 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+/**
+ * `<mr-hotlist-link>`
+ *
+ * Displays a link to a hotlist.
+ *
+ */
+export class MrHotlistLink extends LitElement {
+  /** @override */
+  static get styles() {
+    return SHARED_STYLES;
+  }
+
+  /** @override */
+  render() {
+    if (!this.hotlist) return html``;
+    return html`
+      <a
+        href="/u/${this.hotlist.ownerRef && this.hotlist.ownerRef.userId}/hotlists/${this.hotlist.name}"
+        title="${this.hotlist.name} - ${this.hotlist.summary}"
+      >
+        ${this.hotlist.name}</a>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      hotlist: {type: Object},
+    };
+  }
+}
+customElements.define('mr-hotlist-link', MrHotlistLink);
diff --git a/static_src/elements/framework/links/mr-hotlist-link/mr-hotlist-link.test.js b/static_src/elements/framework/links/mr-hotlist-link/mr-hotlist-link.test.js
new file mode 100644
index 0000000..7071b77
--- /dev/null
+++ b/static_src/elements/framework/links/mr-hotlist-link/mr-hotlist-link.test.js
@@ -0,0 +1,23 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrHotlistLink} from './mr-hotlist-link.js';
+
+let element;
+
+describe('mr-hotlist-link', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-hotlist-link');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrHotlistLink);
+  });
+});
diff --git a/static_src/elements/framework/links/mr-issue-link/mr-issue-link.js b/static_src/elements/framework/links/mr-issue-link/mr-issue-link.js
new file mode 100644
index 0000000..029de6c
--- /dev/null
+++ b/static_src/elements/framework/links/mr-issue-link/mr-issue-link.js
@@ -0,0 +1,119 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {ifDefined} from 'lit-html/directives/if-defined';
+import {issueRefToString, issueRefToUrl} from 'shared/convertersV0.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import '../../mr-dropdown/mr-dropdown.js';
+import '../../../help/mr-cue/mr-fed-ref-cue.js';
+
+/**
+ * `<mr-issue-link>`
+ *
+ * Displays a link to an issue.
+ *
+ */
+export class MrIssueLink extends LitElement {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        a[is-closed] {
+          text-decoration: line-through;
+        }
+        mr-dropdown {
+          width: var(--chops-main-font-size);
+          --mr-dropdown-icon-font-size: var(--chops-main-font-size);
+          --mr-dropdown-menu-min-width: 100px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    let fedRefInfo;
+    if (this.issue && this.issue.extIdentifier) {
+      fedRefInfo = html`
+        <!-- TODO(jeffcarp): Figure out CSS to enable menuAlignment=left -->
+        <mr-dropdown
+          label="Federated Reference Info"
+          icon="info_outline"
+          menuAlignment="right"
+        >
+          <mr-fed-ref-cue
+            cuePrefName="federated_reference"
+            fedRefShortlink=${this.issue.extIdentifier}
+            nondismissible>
+          </mr-fed-ref-cue>
+        </mr-dropdown>
+      `;
+    }
+    return html`
+      <a
+        id="bugLink"
+        href=${this.href}
+        title=${ifDefined(this.issue && this.issue.summary)}
+        ?is-closed=${this.isClosed}
+      >${this._linkText}</a>${fedRefInfo}`;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      // The issue being viewed. Falls back gracefully if this is only a ref.
+      issue: {type: Object},
+      text: {type: String},
+      // The global current project name. NOT the issue's project name.
+      projectName: {type: String},
+      queryParams: {type: Object},
+      short: {type: Boolean},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.issue = {};
+    this.queryParams = {};
+    this.short = false;
+  }
+
+  click() {
+    const link = this.shadowRoot.querySelector('a');
+    if (!link) return;
+    link.click();
+  }
+
+  /**
+   * @return {string} Where this issue links to.
+   */
+  get href() {
+    return issueRefToUrl(this.issue, this.queryParams);
+  }
+
+  get isClosed() {
+    if (!this.issue || !this.issue.statusRef) return false;
+
+    return this.issue.statusRef.meansOpen === false;
+  }
+
+  get _linkText() {
+    const {projectName, issue, text, short} = this;
+    if (text) return text;
+
+    if (issue && issue.extIdentifier) {
+      return issue.extIdentifier;
+    }
+
+    const prefix = short ? '' : 'Issue ';
+
+    return prefix + issueRefToString(issue, projectName);
+  }
+}
+
+customElements.define('mr-issue-link', MrIssueLink);
diff --git a/static_src/elements/framework/links/mr-issue-link/mr-issue-link.test.js b/static_src/elements/framework/links/mr-issue-link/mr-issue-link.test.js
new file mode 100644
index 0000000..1bd3ae9
--- /dev/null
+++ b/static_src/elements/framework/links/mr-issue-link/mr-issue-link.test.js
@@ -0,0 +1,147 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueLink} from './mr-issue-link.js';
+
+let element;
+
+describe('mr-issue-link', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-link');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueLink);
+  });
+
+  it('strikethrough when closed', async () => {
+    await element.updateComplete;
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.isFalse(
+        window.getComputedStyle(link).getPropertyValue(
+            'text-decoration').includes('line-through'));
+    element.issue = {statusRef: {meansOpen: false}};
+
+    await element.updateComplete;
+
+    assert.isTrue(
+        window.getComputedStyle(link).getPropertyValue(
+            'text-decoration').includes('line-through'));
+  });
+
+  it('shortens link text when short is true', () => {
+    element.issue = {
+      projectName: 'test',
+      localId: 13,
+    };
+
+    assert.equal(element._linkText, 'Issue test:13');
+
+    element.short = true;
+
+    assert.equal(element._linkText, 'test:13');
+  });
+
+  it('shows projectName only when different from global', async () => {
+    element.issue = {
+      projectName: 'test',
+      localId: 11,
+    };
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.equal(link.textContent.trim(), 'Issue test:11');
+
+    element.projectName = 'test';
+    await element.updateComplete;
+
+    assert.equal(link.textContent.trim(), 'Issue 11');
+
+    element.projectName = 'other';
+    await element.updateComplete;
+
+    await element.updateComplete;
+
+    assert.equal(link.textContent.trim(), 'Issue test:11');
+  });
+
+  it('shows links for issues', async () => {
+    element.issue = {
+      projectName: 'test',
+      localId: 11,
+    };
+
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.include(link.href.trim(), '/p/test/issues/detail?id=11');
+    assert.equal(link.title, '');
+  });
+
+  it('shows links for federated issues', async () => {
+    element.issue = {
+      extIdentifier: 'b/5678',
+    };
+
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.include(link.href.trim(), 'https://issuetracker.google.com/issues/5678');
+    assert.equal(link.title, '');
+  });
+
+  it('displays an icon for federated references', async () => {
+    element.issue = {
+      extIdentifier: 'b/5678',
+    };
+
+    await element.updateComplete;
+
+    const dropdown = element.shadowRoot.querySelector('mr-dropdown');
+    assert.isNotNull(dropdown);
+    const anchor = dropdown.shadowRoot.querySelector('.anchor');
+    assert.isNotNull(anchor);
+    assert.include(anchor.innerText, 'info_outline');
+  });
+
+  it('displays an info popup for federated references', async () => {
+    element.issue = {
+      extIdentifier: 'b/5678',
+    };
+
+    await element.updateComplete;
+
+    const dropdown = element.shadowRoot.querySelector('mr-dropdown');
+    const anchor = dropdown.shadowRoot.querySelector('.anchor');
+    anchor.click();
+
+    await dropdown.updateComplete;
+
+    assert.isTrue(dropdown.opened);
+
+    const cue = dropdown.querySelector('mr-fed-ref-cue');
+    assert.isNotNull(cue);
+    const message = cue.shadowRoot.querySelector('#message');
+    assert.isNotNull(message);
+    assert.include(message.innerText, 'Buganizer issue tracker');
+  });
+
+  it('shows title when summary is defined', async () => {
+    element.issue = {
+      projectName: 'test',
+      localId: 11,
+      summary: 'Summary',
+    };
+
+    await element.updateComplete;
+    const link = element.shadowRoot.querySelector('#bugLink');
+    assert.equal(link.title, 'Summary');
+  });
+});
diff --git a/static_src/elements/framework/links/mr-user-link/mr-user-link.js b/static_src/elements/framework/links/mr-user-link/mr-user-link.js
new file mode 100644
index 0000000..c009f89
--- /dev/null
+++ b/static_src/elements/framework/links/mr-user-link/mr-user-link.js
@@ -0,0 +1,129 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+
+const NULL_DISPLAY_NAME_VALUES = [EMPTY_FIELD_VALUE, 'a_deleted_user'];
+
+/**
+ * `<mr-user-link>`
+ *
+ * Displays a link to a user profile.
+ *
+ */
+export class MrUserLink extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: inline-block;
+          white-space: nowrap;
+        }
+        i.inline-icon {
+          font-size: var(--chops-icon-font-size);
+          color: #B71C1C;
+          vertical-align: bottom;
+          cursor: pointer;
+        }
+        i.inline-icon-unseen {
+          color: var(--chops-purple-700);
+        }
+        i.material-icons[hidden] {
+          display: none;
+        }
+        .availability-notice {
+          color: #B71C1C;
+          font-weight: bold;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      referencedUsers: {
+        type: Object,
+      },
+      showAvailabilityIcon: {
+        type: Boolean,
+      },
+      showAvailabilityText: {
+        type: Boolean,
+      },
+      userRef: {
+        type: Object,
+        attribute: 'userref',
+      },
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.userRef = {};
+    this.referencedUsers = new Map();
+    this.showAvailabilityIcon = false;
+    this.showAvailabilityText = false;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.referencedUsers = issueV0.referencedUsers(state);
+  }
+
+  /** @override */
+  render() {
+    const availability = this._getAvailability();
+    const userLink = this._getUserLink();
+    const user = this.referencedUsers.get(this.userRef.displayName) || {};
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <i
+        id="availability-icon"
+        class="material-icons inline-icon ${user.last_visit_timestamp ? "" : "inline-icon-unseen"}"
+        title="${availability}"
+        ?hidden="${!(this.showAvailabilityIcon && availability)}"
+      >schedule</i>
+      <a
+        id="user-link"
+        href="${userLink}"
+        title="${this.userRef.displayName}"
+        ?hidden="${!userLink}"
+      >${this.userRef.displayName}</a>
+      <span
+        id="user-text"
+        ?hidden="${userLink}"
+      >${this.userRef.displayName}</span>
+      <div
+        id="availability-text"
+        class="availability-notice"
+        title="${availability}"
+        ?hidden="${!(this.showAvailabilityText && availability)}"
+      >${availability}</div>
+    `;
+  }
+
+  _getAvailability() {
+    if (!this.userRef || !this.referencedUsers) return '';
+    const user = this.referencedUsers.get(this.userRef.displayName) || {};
+    return user.availability;
+  }
+
+  _getUserLink() {
+    if (!this.userRef || !this.userRef.displayName ||
+        NULL_DISPLAY_NAME_VALUES.includes(this.userRef.displayName)) return '';
+    return `/u/${this.userRef.userId || this.userRef.displayName}`;
+  }
+}
+customElements.define('mr-user-link', MrUserLink);
diff --git a/static_src/elements/framework/links/mr-user-link/mr-user-link.test.js b/static_src/elements/framework/links/mr-user-link/mr-user-link.test.js
new file mode 100644
index 0000000..77af246
--- /dev/null
+++ b/static_src/elements/framework/links/mr-user-link/mr-user-link.test.js
@@ -0,0 +1,156 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrUserLink} from './mr-user-link.js';
+
+
+let element;
+let availabilityIcon;
+let userLink;
+let userText;
+let availabilityText;
+
+function getElements() {
+  availabilityIcon = element.shadowRoot.querySelector(
+      '#availability-icon');
+  userLink = element.shadowRoot.querySelector(
+      '#user-link');
+  userText = element.shadowRoot.querySelector(
+      '#user-text');
+  availabilityText = element.shadowRoot.querySelector(
+      '#availability-text');
+}
+
+describe('mr-user-link', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-user-link');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrUserLink);
+  });
+
+  it('no link when no userId and displayName is null value', async () => {
+    element.userRef = {displayName: '----'};
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isFalse(userText.hidden);
+    assert.equal(userText.textContent, '----');
+
+    assert.isTrue(availabilityIcon.hidden);
+    assert.isTrue(userLink.hidden);
+    assert.isTrue(availabilityText.hidden);
+  });
+
+  it('link when displayName', async () => {
+    element.userRef = {displayName: 'test@example.com'};
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isFalse(userLink.hidden);
+    assert.equal(userLink.textContent.trim(), 'test@example.com');
+    assert.isTrue(userLink.href.endsWith('/u/test@example.com'));
+
+    assert.isTrue(availabilityIcon.hidden);
+    assert.isTrue(userText.hidden);
+    assert.isTrue(availabilityText.hidden);
+  });
+
+  it('link when userId', async () => {
+    element.userRef = {userId: '1234', displayName: 'test@example.com'};
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isFalse(userLink.hidden);
+    assert.equal(userLink.textContent.trim(), 'test@example.com');
+    assert.isTrue(userLink.href.endsWith('/u/1234'));
+
+    assert.isTrue(availabilityIcon.hidden);
+    assert.isTrue(userText.hidden);
+    assert.isTrue(availabilityText.hidden);
+  });
+
+  it('show availability', async () => {
+    element.userRef = {userId: '1234', displayName: 'test@example.com'};
+    element.referencedUsers = new Map(
+        [['test@example.com', {availability: 'foo'}]]);
+    element.showAvailabilityIcon = true;
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isFalse(availabilityIcon.hidden);
+    assert.equal(availabilityIcon.title, 'foo');
+
+    assert.isFalse(userLink.hidden);
+    assert.isTrue(userText.hidden);
+    assert.isTrue(availabilityText.hidden);
+  });
+
+  it('dont show availability', async () => {
+    element.userRef = {userId: '1234', displayName: 'test@example.com'};
+    element.referencedUsers = new Map(
+        [['test@example.com', {availability: 'foo'}]]);
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isTrue(availabilityIcon.hidden);
+
+    assert.isFalse(userLink.hidden);
+    assert.isTrue(userText.hidden);
+    assert.isTrue(availabilityText.hidden);
+  });
+
+  it('show availability text', async () => {
+    element.userRef = {userId: '1234', displayName: 'test@example.com'};
+    element.referencedUsers = new Map(
+        [['test@example.com', {availability: 'foo'}]]);
+    element.showAvailabilityText = true;
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isFalse(availabilityText.hidden);
+    assert.equal(availabilityText.title, 'foo');
+    assert.equal(availabilityText.textContent, 'foo');
+
+    assert.isTrue(availabilityIcon.hidden);
+    assert.isFalse(userLink.hidden);
+    assert.isTrue(userText.hidden);
+  });
+
+  it('show availability user never visited', async () => {
+    element.userRef = {userId: '1234', displayName: 'test@example.com'};
+    element.referencedUsers = new Map(
+        [['test@example.com', {last_visit_timestamp: undefined}]]);
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isTrue(availabilityIcon.classList.contains("inline-icon-unseen"));
+  });
+
+  it('show availability user visited', async () => {
+    element.userRef = {userId: '1234', displayName: 'test@example.com'};
+    element.referencedUsers = new Map(
+        [['test@example.com', {last_visit_timestamp: "35"}]]);
+
+    await element.updateComplete;
+    getElements();
+
+    assert.isTrue(availabilityIcon.classList.contains("inline-icon"));
+    assert.isFalse(availabilityIcon.classList.contains("inline-icon-unseen"));
+  });
+});
diff --git a/static_src/elements/framework/mr-autocomplete/mr-autocomplete.js b/static_src/elements/framework/mr-autocomplete/mr-autocomplete.js
new file mode 100644
index 0000000..c37eb42
--- /dev/null
+++ b/static_src/elements/framework/mr-autocomplete/mr-autocomplete.js
@@ -0,0 +1,105 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {ChopsAutocomplete} from
+  'elements/chops/chops-autocomplete/chops-autocomplete';
+import {connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import {arrayDifference} from 'shared/helpers.js';
+import {userRefsToDisplayNames} from 'shared/convertersV0.js';
+
+
+/**
+ * `<mr-autocomplete>` displays an autocomplete input.
+ *
+ */
+export class MrAutocomplete extends connectStore(ChopsAutocomplete) {
+  /** @override */
+  static get properties() {
+    return {
+      ...ChopsAutocomplete.properties,
+      /**
+       * String for the name of autocomplete vocabulary used.
+       * Valid values:
+       *  - 'project': Names of projects available to the current user.
+       *  - 'member': All members in the current project a user is viewing.
+       *  - 'owner': Similar to member, except with groups excluded.
+       *
+       * TODO(zhangtiff): Implement the following stores.
+       *  - 'component': All components in the current project.
+       *  - 'label': Well-known labels in the current project.
+       */
+      vocabularyName: {type: String},
+      /**
+       * Object where the keys are 'type' values and each value is an object
+       * with the format {strings, docDict, replacer}.
+       */
+      vocabularies: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.vocabularyName = '';
+    this.vocabularies = {};
+  }
+
+  /** @override */
+  stateChanged(state) {
+    const visibleMembers = projectV0.viewedVisibleMembers(state);
+    const userProjects = userV0.projects(state);
+    this.vocabularies = {
+      'project': this._setupProjectVocabulary(userProjects),
+      'member': this._setupMemberVocabulary(visibleMembers),
+      'owner': this._setupOwnerVocabulary(visibleMembers),
+    };
+  }
+
+  // TODO(zhangtiff): Move this logic into selectors to prevent computing
+  // vocabularies for every single instance of autocomplete.
+  _setupProjectVocabulary(userProjects) {
+    const {ownerOf = [], memberOf = [], contributorTo = []} = userProjects;
+    const strings = [...ownerOf, ...memberOf, ...contributorTo];
+    return {strings};
+  }
+
+  _setupMemberVocabulary(visibleMembers) {
+    const {userRefs = []} = visibleMembers;
+    return {strings: userRefsToDisplayNames(userRefs)};
+  }
+
+  _setupOwnerVocabulary(visibleMembers) {
+    const {userRefs = [], groupRefs = []} = visibleMembers;
+    const groups = userRefsToDisplayNames(groupRefs);
+    const users = userRefsToDisplayNames(userRefs);
+
+    // Remove groups from the list of all members.
+    const owners = arrayDifference(users, groups);
+    return {strings: owners};
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('vocabularyName') ||
+        changedProperties.has('vocabularies')) {
+      if (this.vocabularyName in this.vocabularies) {
+        const props = this.vocabularies[this.vocabularyName];
+
+        this.strings = props.strings || [];
+        this.docDict = props.docDict || {};
+        this.replacer = props.replacer;
+      } else {
+        // Clear autocomplete if there's no data for it.
+        this.strings = [];
+        this.docDict = {};
+        this.replacer = null;
+      }
+    }
+
+    super.update(changedProperties);
+  }
+}
+customElements.define('mr-autocomplete', MrAutocomplete);
diff --git a/static_src/elements/framework/mr-autocomplete/mr-autocomplete.test.js b/static_src/elements/framework/mr-autocomplete/mr-autocomplete.test.js
new file mode 100644
index 0000000..0c4e3ae
--- /dev/null
+++ b/static_src/elements/framework/mr-autocomplete/mr-autocomplete.test.js
@@ -0,0 +1,86 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrAutocomplete} from './mr-autocomplete.js';
+
+let element;
+
+describe('mr-autocomplete', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-autocomplete');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrAutocomplete);
+  });
+
+  it('sets properties based on vocabularies', async () => {
+    assert.deepEqual(element.strings, []);
+    assert.deepEqual(element.docDict, {});
+
+    element.vocabularies = {
+      'project': {
+        'strings': ['chromium', 'v8'],
+        'docDict': {'chromium': 'move the web forward'},
+      },
+    };
+
+    element.vocabularyName = 'project';
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.strings, ['chromium', 'v8']);
+    assert.deepEqual(element.docDict, {'chromium': 'move the web forward'});
+  });
+
+  it('_setupProjectVocabulary', () => {
+    assert.deepEqual(element._setupProjectVocabulary({}), {strings: []});
+
+    assert.deepEqual(element._setupProjectVocabulary({
+      ownerOf: ['chromium'],
+      memberOf: ['skia'],
+      contributorTo: ['v8'],
+    }), {strings: ['chromium', 'skia', 'v8']});
+  });
+
+  it('_setupMemberVocabulary', () => {
+    assert.deepEqual(element._setupMemberVocabulary({}), {strings: []});
+
+    assert.deepEqual(element._setupMemberVocabulary({
+      userRefs: [
+        {displayName: 'group@example.com', userId: '100'},
+        {displayName: 'test@example.com', userId: '123'},
+        {displayName: 'test2@example.com', userId: '543'},
+      ],
+      groupRefs: [
+        {displayName: 'group@example.com', userId: '100'},
+      ],
+    }), {strings:
+      ['group@example.com', 'test@example.com', 'test2@example.com'],
+    });
+  });
+
+  it('_setupOwnerVocabulary', () => {
+    assert.deepEqual(element._setupOwnerVocabulary({}), {strings: []});
+
+    assert.deepEqual(element._setupOwnerVocabulary({
+      userRefs: [
+        {displayName: 'group@example.com', userId: '100'},
+        {displayName: 'test@example.com', userId: '123'},
+        {displayName: 'test2@example.com', userId: '543'},
+      ],
+      groupRefs: [
+        {displayName: 'group@example.com', userId: '100'},
+      ],
+    }), {strings:
+      ['test@example.com', 'test2@example.com'],
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-button-bar/mr-button-bar.js b/static_src/elements/framework/mr-button-bar/mr-button-bar.js
new file mode 100644
index 0000000..8cff503
--- /dev/null
+++ b/static_src/elements/framework/mr-button-bar/mr-button-bar.js
@@ -0,0 +1,100 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/framework/mr-dropdown/mr-dropdown.js';
+
+import 'shared/typedef.js';
+
+/** Button bar containing table controls. */
+export class MrButtonBar extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: flex;
+      }
+      button {
+        background: none;
+        color: var(--chops-link-color);
+        cursor: pointer;
+        font-size: var(--chops-normal-font-size);
+        font-weight: var(--chops-link-font-weight);
+
+        line-height: 24px;
+        padding: 4px 16px;
+
+        border: none;
+
+        align-items: center;
+        display: inline-flex;
+      }
+      button:hover {
+        background: var(--chops-active-choice-bg);
+      }
+      i.material-icons {
+        font-size: 20px;
+        margin-right: 4px;
+        vertical-align: middle;
+      }
+      mr-dropdown {
+        --mr-dropdown-anchor-padding: 6px 4px;
+        --mr-dropdown-icon-color: var(--chops-link-color);
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      ${this.items.map(_renderItem)}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      items: {type: Array},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+
+    /** @type {Array<MenuItem>} */
+    this.items = [];
+  }
+};
+
+/**
+ * Renders one item.
+ * @param {MenuItem} item
+ * @return {TemplateResult}
+ */
+function _renderItem(item) {
+  if (item.items) {
+    return html`
+      <mr-dropdown
+        icon=${item.icon}
+        menuAlignment="left"
+        label=${item.text}
+        .items=${item.items}
+      ></mr-dropdown>
+    `;
+  } else {
+    return html`
+      <button @click=${item.handler}>
+        <i class="material-icons" ?hidden=${!item.icon}>
+          ${item.icon}
+        </i>
+        ${item.text}
+      </button>
+    `;
+  }
+}
+
+customElements.define('mr-button-bar', MrButtonBar);
diff --git a/static_src/elements/framework/mr-button-bar/mr-button-bar.test.js b/static_src/elements/framework/mr-button-bar/mr-button-bar.test.js
new file mode 100644
index 0000000..349a8df
--- /dev/null
+++ b/static_src/elements/framework/mr-button-bar/mr-button-bar.test.js
@@ -0,0 +1,53 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {MrButtonBar} from './mr-button-bar.js';
+
+/** @type {MrButtonBar} */
+let element;
+
+describe('mr-button-bar', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('mr-button-bar');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrButtonBar);
+  });
+
+  it('renders button items', async () => {
+    const handler = sinon.stub();
+
+    element.items = [{icon: 'emoji_nature', text: 'Pollinate', handler}];
+    await element.updateComplete;
+
+    const button = element.shadowRoot.querySelector('button');
+    button.click();
+
+    assert.include(button.innerHTML, 'emoji_nature');
+    assert.include(button.innerHTML, 'Pollinate');
+    sinon.assert.calledOnce(handler);
+  });
+
+  it('renders dropdown items', async () => {
+    const items = [{icon: 'emoji_nature', text: 'Pollinate'}];
+    element.items = [{icon: 'more_vert', text: 'More actions...', items}];
+    await element.updateComplete;
+
+    /** @type {MrDropdown} */
+    const dropdown = element.shadowRoot.querySelector('mr-dropdown');
+    assert.strictEqual(dropdown.icon, 'more_vert');
+    assert.strictEqual(dropdown.label, 'More actions...');
+    assert.strictEqual(dropdown.items, items);
+  });
+});
diff --git a/static_src/elements/framework/mr-comment-content/mr-attachment.js b/static_src/elements/framework/mr-comment-content/mr-attachment.js
new file mode 100644
index 0000000..c435dfd
--- /dev/null
+++ b/static_src/elements/framework/mr-comment-content/mr-attachment.js
@@ -0,0 +1,206 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {FILE_DOWNLOAD_WARNING, ALLOWED_ATTACHMENT_EXTENSIONS,
+  ALLOWED_CONTENT_TYPE_PREFIXES} from 'shared/settings.js';
+import 'elements/chops/chops-button/chops-button.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+/**
+ * `<mr-attachment>`
+ *
+ * Display attachments for Monorail comments.
+ *
+ */
+export class MrAttachment extends connectStore(LitElement) {
+  /** @override */
+  static get properties() {
+    return {
+      attachment: {type: Object},
+      projectName: {type: String},
+      localId: {type: Number},
+      sequenceNum: {type: Number},
+      canDelete: {type: Boolean},
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        .attachment-view,
+        .attachment-download {
+          margin-left: 8px;
+          display: block;
+        }
+        .attachment-delete {
+          margin-left: 16px;
+          color: var(--chops-button-color);
+          background: var(--chops-button-bg);
+          border-color: transparent;
+        }
+        .comment-attachment {
+          min-width: 20%;
+          width: fit-content;
+          background: var(--chops-card-details-bg);
+          padding: 4px;
+          margin: 8px;
+          overflow: auto;
+        }
+        .comment-attachment-header {
+          display: flex;
+          flex-wrap: nowrap;
+        }
+        .filename {
+          margin-left: 8px;
+          display: flex;
+          justify-content: space-between;
+          align-items: center;
+        }
+        .filename-deleted {
+          margin-right: 4px;
+        }
+        .filesize {
+          margin-left: 8px;
+          white-space: nowrap;
+        }
+        .preview {
+          border: 2px solid #c3d9ff;
+          padding: 1px;
+          max-width: 98%;
+        }
+        .preview:hover {
+          border: 2px solid blue;
+        }
+      `];
+  }
+
+
+  /** @override */
+  render() {
+    return html`
+      <div class="comment-attachment">
+        <div class="filename">
+          ${this.attachment.isDeleted ? html`
+            <div class="filename-deleted">[Deleted]</div>
+          ` : ''}
+          <b>${this.attachment.filename}</b>
+          ${this.canDelete ? html`
+            <chops-button
+              class="attachment-delete"
+              @click=${this._deleteAttachment}>
+              ${this.attachment.isDeleted ? 'Undelete' : 'Delete'}
+            </chops-button>
+          ` : ''}
+        </div>
+        ${!this.attachment.isDeleted ? html`
+          <div class="comment-attachment-header">
+            <div class="filesize">${_bytesOrKbOrMb(this.attachment.size)}</div>
+            ${this.attachment.viewUrl ? html`
+              <a
+                class="attachment-view"
+                href=${this.attachment.viewUrl}
+                target="_blank"
+              >View</a>
+            `: ''}
+            <a
+              class="attachment-download"
+              href=${this.attachment.downloadUrl}
+              target="_blank"
+              ?hidden=${!this.attachment.downloadUrl}
+              @click=${this._warnOnDownload}
+            >Download</a>
+          </div>
+          ${this.attachment.thumbnailUrl ? html`
+            <a href=${this.attachment.viewUrl} target="_blank">
+              <img
+                class="preview" alt="attachment preview"
+                src=${this.attachment.thumbnailUrl}>
+            </a>
+          ` : ''}
+          ${_isVideo(this.attachment.contentType) ? html`
+            <video
+              src=${this.attachment.viewUrl}
+              class="preview"
+              controls
+              width="640"
+              preload="metadata"
+            ></video>
+          ` : ''}
+        ` : ''}
+      </div>
+    `;
+  }
+
+  /**
+   * Deletes a given attachment in a comment.
+   */
+  _deleteAttachment() {
+    const issueRef = {
+      projectName: this.projectName,
+      localId: this.localId,
+    };
+
+    const promise = prpcClient.call(
+        'monorail.Issues', 'DeleteAttachment',
+        {
+          issueRef,
+          sequenceNum: this.sequenceNum,
+          attachmentId: this.attachment.attachmentId,
+          delete: !this.attachment.isDeleted,
+        });
+
+    promise.then(() => {
+      store.dispatch(issueV0.fetchComments(issueRef));
+    }, (error) => {
+      console.log('Failed to (un)delete attachment', error);
+    });
+  }
+
+  /**
+   * Give the user a warning before they download files that Monorail thinks
+   * might have the potential to be unsafe.
+   * @param {MouseEvent} e
+   */
+  _warnOnDownload(e) {
+    const isAllowedType = ALLOWED_CONTENT_TYPE_PREFIXES.some((prefix) => {
+      return this.attachment.contentType.startsWith(prefix);
+    });
+    const isAllowedExtension = ALLOWED_ATTACHMENT_EXTENSIONS.some((ext) => {
+      return this.attachment.filename.toLowerCase().endsWith(ext);
+    });
+
+    if (isAllowedType || isAllowedExtension) return;
+    if (!window.confirm(FILE_DOWNLOAD_WARNING)) {
+      e.preventDefault();
+    }
+  }
+}
+
+function _isVideo(contentType) {
+  if (!contentType) return;
+  return contentType.startsWith('video/');
+}
+
+function _bytesOrKbOrMb(numBytes) {
+  if (numBytes < 1024) {
+    return `${numBytes} bytes`; // e.g., 128 bytes
+  } else if (numBytes < 99 * 1024) {
+    return `${(numBytes / 1024).toFixed(1)} KB`; // e.g. 23.4 KB
+  } else if (numBytes < 1024 * 1024) {
+    return `${(numBytes / 1024).toFixed(0)} KB`; // e.g., 219 KB
+  } else if (numBytes < 99 * 1024 * 1024) {
+    return `${(numBytes / 1024 / 1024).toFixed(1)} MB`; // e.g., 21.9 MB
+  } else {
+    return `${(numBytes / 1024 / 1024).toFixed(0)} MB`; // e.g., 100 MB
+  }
+}
+
+customElements.define('mr-attachment', MrAttachment);
diff --git a/static_src/elements/framework/mr-comment-content/mr-attachment.test.js b/static_src/elements/framework/mr-comment-content/mr-attachment.test.js
new file mode 100644
index 0000000..ec79c66
--- /dev/null
+++ b/static_src/elements/framework/mr-comment-content/mr-attachment.test.js
@@ -0,0 +1,228 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert, expect} from 'chai';
+import {MrAttachment} from './mr-attachment.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import {FILE_DOWNLOAD_WARNING} from 'shared/settings.js';
+
+let element;
+
+describe('mr-attachment', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-attachment');
+    document.body.appendChild(element);
+    sinon.stub(prpcClient, 'call').returns(Promise.resolve({}));
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    prpcClient.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrAttachment);
+  });
+
+  it('shows image thumbnail', async () => {
+    element.attachment = {
+      thumbnailUrl: 'thumbnail.jpeg',
+      contentType: 'image/jpeg',
+    };
+    await element.updateComplete;
+    const img = element.shadowRoot.querySelector('img');
+    assert.isNotNull(img);
+    assert.isTrue(img.src.endsWith('thumbnail.jpeg'));
+  });
+
+  it('shows video thumbnail', async () => {
+    element.attachment = {
+      viewUrl: 'video.mp4',
+      contentType: 'video/mpeg',
+    };
+    await element.updateComplete;
+    const video = element.shadowRoot.querySelector('video');
+    assert.isNotNull(video);
+    assert.isTrue(video.src.endsWith('video.mp4'));
+  });
+
+  it('does not show image thumbnail if deleted', async () => {
+    element.attachment = {
+      thumbnailUrl: 'thumbnail.jpeg',
+      contentType: 'image/jpeg',
+      isDeleted: true,
+    };
+    await element.updateComplete;
+    const img = element.shadowRoot.querySelector('img');
+    assert.isNull(img);
+  });
+
+  it('does not show video thumbnail if deleted', async () => {
+    element.attachment = {
+      viewUrl: 'video.mp4',
+      contentType: 'video/mpeg',
+      isDeleted: true,
+    };
+    await element.updateComplete;
+    const video = element.shadowRoot.querySelector('video');
+    assert.isNull(video);
+  });
+
+  it('deletes attachment', async () => {
+    prpcClient.call.callsFake(() => Promise.resolve({}));
+
+    element.attachment = {
+      attachmentId: 67890,
+      isDeleted: false,
+    };
+    element.canDelete = true;
+    element.projectName = 'proj';
+    element.localId = 1234;
+    element.sequenceNum = 3;
+    await element.updateComplete;
+
+    const deleteButton = element.shadowRoot.querySelector('chops-button');
+    deleteButton.click();
+
+    assert.deepEqual(prpcClient.call.getCall(0).args, [
+      'monorail.Issues', 'DeleteAttachment',
+      {
+        issueRef: {
+          projectName: 'proj',
+          localId: 1234,
+        },
+        sequenceNum: 3,
+        attachmentId: 67890,
+        delete: true,
+      },
+    ]);
+    assert.isTrue(prpcClient.call.calledOnce);
+  });
+
+  it('undeletes attachment', async () => {
+    prpcClient.call.callsFake(() => Promise.resolve({}));
+    element.attachment = {
+      attachmentId: 67890,
+      isDeleted: true,
+    };
+    element.canDelete = true;
+    element.projectName = 'proj';
+    element.localId = 1234;
+    element.sequenceNum = 3;
+    await element.updateComplete;
+
+    const deleteButton = element.shadowRoot.querySelector('chops-button');
+    deleteButton.click();
+
+    assert.deepEqual(prpcClient.call.getCall(0).args, [
+      'monorail.Issues', 'DeleteAttachment',
+      {
+        issueRef: {
+          projectName: 'proj',
+          localId: 1234,
+        },
+        sequenceNum: 3,
+        attachmentId: 67890,
+        delete: false,
+      },
+    ]);
+    assert.isTrue(prpcClient.call.calledOnce);
+  });
+
+  it('view link is not displayed if not given', async () => {
+    element.attachment = {};
+    await element.updateComplete;
+    const viewLink = element.shadowRoot.querySelector('.attachment-view');
+    assert.isNull(viewLink);
+  });
+
+  it('view link is displayed if given', async () => {
+    element.attachment = {
+      viewUrl: 'http://example.com/attachment.foo',
+    };
+    await element.updateComplete;
+    const viewLink = element.shadowRoot.querySelector('.attachment-view');
+    assert.isNotNull(viewLink);
+    expect(viewLink).to.be.displayed;
+    assert.equal(viewLink.href, 'http://example.com/attachment.foo');
+  });
+
+  describe('download', () => {
+    let downloadLink;
+
+    beforeEach(async () => {
+      sinon.stub(window, 'confirm').returns(false);
+
+
+      element.attachment = {};
+      await element.updateComplete;
+      downloadLink = element.shadowRoot.querySelector('.attachment-download');
+      // Prevent Karma from opening up new tabs because of simulated link
+      // clicks.
+      downloadLink.removeAttribute('target');
+    });
+
+    afterEach(() => {
+      window.confirm.restore();
+    });
+
+    it('download link is not displayed if not given', async () => {
+      element.attachment = {};
+      await element.updateComplete;
+      assert.isTrue(downloadLink.hidden);
+    });
+
+    it('download link is displayed if given', async () => {
+      element.attachment = {
+        downloadUrl: 'http://example.com/attachment.foo',
+      };
+      await element.updateComplete;
+      const downloadLink = element.shadowRoot.querySelector(
+          '.attachment-download');
+      assert.isFalse(downloadLink.hidden);
+      expect(downloadLink).to.be.displayed;
+      assert.equal(downloadLink.href, 'http://example.com/attachment.foo');
+    });
+
+    it('download allows recognized file extension and type', async () => {
+      element.attachment = {
+        contentType: 'image/png',
+        filename: 'not-a-virus.png',
+        downloadUrl: '#',
+      };
+      await element.updateComplete;
+
+      downloadLink.click();
+
+      sinon.assert.notCalled(window.confirm);
+    });
+
+    it('file extension matching is case insensitive', async () => {
+      element.attachment = {
+        contentType: 'image/png',
+        filename: 'not-a-virus.PNG',
+        downloadUrl: '#',
+      };
+      await element.updateComplete;
+
+      downloadLink.click();
+
+      sinon.assert.notCalled(window.confirm);
+    });
+
+    it('download warns on unrecognized file extension and type', async () => {
+      element.attachment = {
+        contentType: 'application/virus',
+        filename: 'fake-virus.exe',
+        downloadUrl: '#',
+      };
+      await element.updateComplete;
+
+      downloadLink.click();
+
+      sinon.assert.calledOnce(window.confirm);
+      sinon.assert.calledWith(window.confirm, FILE_DOWNLOAD_WARNING);
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-comment-content/mr-comment-content.js b/static_src/elements/framework/mr-comment-content/mr-comment-content.js
new file mode 100644
index 0000000..c2bf3e8
--- /dev/null
+++ b/static_src/elements/framework/mr-comment-content/mr-comment-content.js
@@ -0,0 +1,131 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {ifDefined} from 'lit-html/directives/if-defined';
+import {autolink} from 'autolink.js';
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import {SHARED_STYLES, MD_STYLES} from 'shared/shared-styles.js';
+import {shouldRenderMarkdown, renderMarkdown} from 'shared/md-helper.js';
+import {unsafeHTML} from 'lit-html/directives/unsafe-html.js';
+
+/**
+ * `<mr-comment-content>`
+ *
+ * Displays text for a comment.
+ *
+ */
+export class MrCommentContent extends connectStore(LitElement) {
+  /** @override */
+  constructor() {
+    super();
+
+    this.content = '';
+    this.commentReferences = new Map();
+    this.isDeleted = false;
+    this.projectName = '';
+    this.author = '';
+    this.prefs = {};
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      content: {type: String},
+      commentReferences: {type: Object},
+      revisionUrlFormat: {type: String},
+      isDeleted: {
+        type: Boolean,
+        reflect: true,
+      },
+      projectName: {type: String},
+      author: {type: String},
+      prefs: {type: Object},
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      MD_STYLES,
+      css`
+        :host {
+          word-break: break-word;
+          font-size: var(--chops-main-font-size);
+          line-height: 130%;
+          font-family: var(--mr-toggled-font-family);
+        }
+        :host([isDeleted]) {
+          color: #888;
+          font-style: italic;
+        }
+        .line {
+          white-space: pre-wrap;
+        }
+        .strike-through {
+          text-decoration: line-through;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    if (shouldRenderMarkdown({project: this.projectName, author: this.author,
+          enabled: this._renderMarkdown})) {
+      return html`
+        <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+        <div class="markdown">
+          ${unsafeHTML(renderMarkdown(this.content))}
+        </div>
+        `;
+    }
+    const runs = autolink.markupAutolinks(
+        this.content, this.commentReferences, this.projectName,
+        this.revisionUrlFormat);
+    const templates = runs.map((run) => {
+      switch (run.tag) {
+        case 'b':
+          return html`<b class="line">${run.content}</b>`;
+        case 'br':
+          return html`<br>`;
+        case 'a':
+          return html`<a
+            class="line"
+            target="_blank"
+            href=${run.href}
+            class=${run.css}
+            title=${ifDefined(run.title)}
+          >${run.content}</a>`;
+        default:
+          return html`<span class="line">${run.content}</span>`;
+      }
+    });
+    return html`${templates}`;
+  }
+
+  /**
+   * Helper to get state of Markdown rendering.
+   * @return {boolean} Whether to render Markdown.
+   */
+  get _renderMarkdown() {
+    const {prefs} = this;
+    if (!prefs) return true;
+    return prefs.get('render_markdown');
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.commentReferences = issueV0.commentReferences(state);
+    this.projectName = issueV0.viewedIssueRef(state).projectName;
+    this.revisionUrlFormat =
+      projectV0.viewedPresentationConfig(state).revisionUrlFormat;
+    this.prefs = userV0.prefs(state);
+  }
+}
+customElements.define('mr-comment-content', MrCommentContent);
diff --git a/static_src/elements/framework/mr-comment-content/mr-comment-content.test.js b/static_src/elements/framework/mr-comment-content/mr-comment-content.test.js
new file mode 100644
index 0000000..4eeaab5
--- /dev/null
+++ b/static_src/elements/framework/mr-comment-content/mr-comment-content.test.js
@@ -0,0 +1,84 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrCommentContent} from './mr-comment-content.js';
+
+
+let element;
+
+describe('mr-comment-content', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-comment-content');
+    document.body.appendChild(element);
+
+    document.body.style.setProperty('--mr-toggled-font-family', 'Some-font');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    document.body.style.removeProperty('--mr-toggled-font-family');
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrCommentContent);
+  });
+
+  it('changes rendered font based on --mr-toggled-font-family', async () => {
+    element.content = 'A comment';
+
+    await element.updateComplete;
+
+    const fontFamily = window.getComputedStyle(element).getPropertyValue(
+        'font-family');
+
+    assert.equal(fontFamily, 'Some-font');
+  });
+
+  it('does not render spurious spaces', async () => {
+    element.content =
+      'Some text before a go/link and more text before <b>some bold text</b>.';
+
+    await element.updateComplete;
+
+    const textContents = Array.from(element.shadowRoot.children).map(
+        (child) => child.textContent);
+
+    assert.deepEqual(textContents, [
+      'Some text before a',
+      ' ',
+      'go/link',
+      ' and more text before ',
+      'some bold text',
+      '.',
+    ]);
+
+    assert.deepEqual(
+        element.shadowRoot.textContent,
+        'Some text before a go/link and more text before some bold text.');
+  });
+
+  it('does render markdown', async () => {
+    element.prefs = new Map([['render_markdown', true]]);
+    element.content = '### this is a header';
+    element.projectName = 'monkeyrail';
+
+    await element.updateComplete;
+
+    const headerText = element.shadowRoot.querySelector('h3').textContent;
+    assert.equal(headerText, 'this is a header');
+  });
+
+  it('does not render markdown when prefs are set to false', async () => {
+    element.prefs = new Map([['render_markdown', false]]);
+    element.projectName = 'monkeyrail';
+    element.content = '### this is a header';
+
+    await element.updateComplete;
+
+    const commentText = element.shadowRoot.textContent;
+    assert.equal(commentText, '### this is a header');
+  });
+});
diff --git a/static_src/elements/framework/mr-comment-content/mr-description.js b/static_src/elements/framework/mr-comment-content/mr-description.js
new file mode 100644
index 0000000..89ae105
--- /dev/null
+++ b/static_src/elements/framework/mr-comment-content/mr-description.js
@@ -0,0 +1,137 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import './mr-comment-content.js';
+import './mr-attachment.js';
+
+import {relativeTime} from
+  'elements/chops/chops-timestamp/chops-timestamp-helpers';
+
+
+/**
+ * `<mr-description>`
+ *
+ * Element for displaying a description or survey.
+ *
+ */
+export class MrDescription extends LitElement {
+  /** @override */
+  constructor() {
+    super();
+
+    this.descriptionList = [];
+    this.selectedIndex = 0;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      descriptionList: {type: Array},
+      selectedIndex: {type: Number},
+    };
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    super.updated(changedProperties);
+
+    if (changedProperties.has('descriptionList')) {
+      if (!this.descriptionList || !this.descriptionList.length) return;
+      this.selectedIndex = this.descriptionList.length - 1;
+    }
+  }
+
+  /** @override */
+  static get styles() {
+    return css`
+      .select-container {
+        text-align: right;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    const selectedDescription = this.selectedDescription;
+
+    return html`
+      <div class="select-container">
+        <select
+          @change=${this._selectChanged}
+          ?hidden=${!this.descriptionList || this.descriptionList.length <= 1}
+          aria-label="Description history menu">
+          ${this.descriptionList.map((desc, i) => this._renderDescriptionOption(desc, i))}
+        </select>
+      </div>
+      <mr-comment-content
+        .content=${selectedDescription.content}
+        .author=${selectedDescription.commenter.displayName}
+      ></mr-comment-content>
+      <div>
+        ${(selectedDescription.attachments || []).map((attachment) => html`
+          <mr-attachment
+            .attachment=${attachment}
+            .projectName=${selectedDescription.projectName}
+            .localId=${selectedDescription.localId}
+            .sequenceNum=${selectedDescription.sequenceNum}
+            .canDelete=${selectedDescription.canDelete}
+          ></mr-attachment>
+        `)}
+      </div>
+    `;
+  }
+
+  /**
+   * Getter for the currently viewed description.
+   * @return {Comment} The description object.
+   */
+  get selectedDescription() {
+    const descriptions = this.descriptionList || [];
+    const index = Math.max(
+      Math.min(this.selectedIndex, descriptions.length - 1),
+      0);
+    return descriptions[index] || {};
+  }
+
+  /**
+   * Helper to render a <select> <option> for a single description, for our
+   * description selector.
+   * @param {Comment} description
+   * @param {Number} index
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderDescriptionOption(description, index) {
+    const {commenter, timestamp} = description || {};
+    const byLine = commenter ? `by ${commenter.displayName}` : '';
+    return html`
+      <option value=${index} ?selected=${index === this.selectedIndex}>
+        Description #${index + 1} ${byLine} (${_relativeTime(timestamp)})
+      </option>
+    `;
+  }
+
+  /**
+   * Updates the element's selectedIndex when the user changes the select menu.
+   * @param {Event} evt
+   */
+  _selectChanged(evt) {
+    if (!evt || !evt.target) return;
+    this.selectedIndex = Number.parseInt(evt.target.value);
+  }
+}
+
+/**
+ * Template helper for rendering relative time.
+ * @param {number} unixTime Unix timestamp in seconds.
+ * @return {string} human readable timestamp.
+ */
+function _relativeTime(unixTime) {
+  unixTime = Number.parseInt(unixTime);
+  if (Number.isNaN(unixTime)) return;
+  return relativeTime(new Date(unixTime * 1000));
+}
+
+customElements.define('mr-description', MrDescription);
diff --git a/static_src/elements/framework/mr-comment-content/mr-description.test.js b/static_src/elements/framework/mr-comment-content/mr-description.test.js
new file mode 100644
index 0000000..9d39149
--- /dev/null
+++ b/static_src/elements/framework/mr-comment-content/mr-description.test.js
@@ -0,0 +1,81 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrDescription} from './mr-description.js';
+
+
+let element;
+
+describe('mr-description', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-description');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrDescription);
+  });
+
+  it('changes rendered description on select change', async () => {
+    element.descriptionList = [
+      {content: 'description one', commenter: {displayName: 'name'}},
+      {content: 'description two', commenter: {displayName: 'name'}},
+    ];
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    const commentContent =
+      element.shadowRoot.querySelector('mr-comment-content');
+    assert.equal('description two', commentContent.content);
+
+    element.selectedIndex = 0;
+
+    await element.updateComplete;
+
+    assert.equal('description one', commentContent.content);
+  });
+
+  it('hides selector when only one description', async () => {
+    element.descriptionList = [
+      {content: 'Hello world', commenter: {displayName: 'name@email.com'}},
+      {content: 'rutabaga', commenter: {displayName: 'name@email.com'}},
+    ];
+
+    await element.updateComplete;
+
+    const selectMenu = element.shadowRoot.querySelector('select');
+    assert.isFalse(selectMenu.hidden);
+
+    element.descriptionList = [
+      {content: 'blehh', commenter: {displayName: 'name@email.com'}},
+    ];
+
+    await element.updateComplete;
+
+    assert.isTrue(selectMenu.hidden);
+  });
+
+  it('selector still renders when one description is deleted', async () => {
+    element.descriptionList = [
+      {content: 'Hello world', commenter: {displayName: 'name@email.com'}},
+      {isDeleted: true, commenter: {displayName: 'name@email.com'}},
+    ];
+
+    await element.updateComplete;
+
+    const selectMenu = element.shadowRoot.querySelector('select');
+    assert.isFalse(selectMenu.hidden);
+
+    const options = selectMenu.querySelectorAll('option');
+
+    assert.include(options[0].textContent, 'Description #1 by name@email.com');
+    assert.include(options[1].textContent, 'Description #2');
+  });
+});
diff --git a/static_src/elements/framework/mr-dropdown/mr-account-dropdown.js b/static_src/elements/framework/mr-dropdown/mr-account-dropdown.js
new file mode 100644
index 0000000..264b976
--- /dev/null
+++ b/static_src/elements/framework/mr-dropdown/mr-account-dropdown.js
@@ -0,0 +1,63 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import './mr-dropdown.js';
+
+/**
+ * `<mr-account-dropdown>`
+ *
+ * Account dropdown menu for Monorail.
+ *
+ */
+export class MrAccountDropdown extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+        :host {
+          position: relative;
+          display: inline-block;
+          height: 100%;
+          font-size: inherit;
+        }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <mr-dropdown
+        .text=${this.userDisplayName}
+        .items=${this.items}
+        .icon="arrow_drop_down"
+      ></mr-dropdown>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      userDisplayName: String,
+      logoutUrl: String,
+      loginUrl: String,
+    };
+  }
+
+  get items() {
+    return [
+      {text: 'Switch accounts', url: this.loginUrl},
+      {separator: true},
+      {text: 'Profile', url: `/u/${this.userDisplayName}`},
+      {text: 'Updates', url: `/u/${this.userDisplayName}/updates`},
+      {text: 'Settings', url: '/hosting/settings'},
+      {text: 'Saved queries', url: `/u/${this.userDisplayName}/queries`},
+      {text: 'Hotlists', url: `/u/${this.userDisplayName}/hotlists`},
+      {separator: true},
+      {text: 'Sign out', url: this.logoutUrl},
+    ];
+  }
+}
+
+customElements.define('mr-account-dropdown', MrAccountDropdown);
diff --git a/static_src/elements/framework/mr-dropdown/mr-account-dropdown.test.js b/static_src/elements/framework/mr-dropdown/mr-account-dropdown.test.js
new file mode 100644
index 0000000..f365823
--- /dev/null
+++ b/static_src/elements/framework/mr-dropdown/mr-account-dropdown.test.js
@@ -0,0 +1,23 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrAccountDropdown} from './mr-account-dropdown.js';
+
+let element;
+
+describe('mr-account-dropdown', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-account-dropdown');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrAccountDropdown);
+  });
+});
diff --git a/static_src/elements/framework/mr-dropdown/mr-dropdown.js b/static_src/elements/framework/mr-dropdown/mr-dropdown.js
new file mode 100644
index 0000000..4564ab0
--- /dev/null
+++ b/static_src/elements/framework/mr-dropdown/mr-dropdown.js
@@ -0,0 +1,367 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {ifDefined} from 'lit-html/directives/if-defined';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import 'shared/typedef.js';
+
+export const SCREENREADER_ATTRIBUTE_ERROR = `For screenreader support,
+  mr-dropdown must always have either a label or a text property defined.`;
+
+/**
+ * `<mr-dropdown>`
+ *
+ * Dropdown menu for Monorail.
+ *
+ */
+export class MrDropdown extends LitElement {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          position: relative;
+          display: inline-block;
+          height: 100%;
+          font-size: inherit;
+          font-family: var(--chops-font-family);
+          --mr-dropdown-icon-color: var(--chops-primary-icon-color);
+          --mr-dropdown-icon-font-size: var(--chops-icon-font-size);
+          --mr-dropdown-anchor-font-weight: var(--chops-link-font-weight);
+          --mr-dropdown-anchor-padding: 4px 0.25em;
+          --mr-dropdown-anchor-justify-content: center;
+          --mr-dropdown-menu-max-height: initial;
+          --mr-dropdown-menu-overflow: initial;
+          --mr-dropdown-menu-min-width: 120%;
+          --mr-dropdown-menu-font-size: var(--chops-large-font-size);
+          --mr-dropdown-menu-icon-size: var(--chops-icon-font-size);
+        }
+        :host([hidden]) {
+          display: none;
+          visibility: hidden;
+        }
+        :host(:not([opened])) .menu {
+          display: none;
+          visibility: hidden;
+        }
+        strong {
+          font-size: var(--chops-large-font-size);
+        }
+        i.material-icons {
+          font-size: var(--mr-dropdown-icon-font-size);
+          display: inline-block;
+          color: var(--mr-dropdown-icon-color);
+          padding: 0 2px;
+          box-sizing: border-box;
+        }
+        i.material-icons[hidden],
+        .menu-item > i.material-icons[hidden] {
+          display: none;
+        }
+        .menu-item > i.material-icons {
+          display: block;
+          font-size: var(--mr-dropdown-menu-icon-size);
+          width: var(--mr-dropdown-menu-icon-size);
+          height: var(--mr-dropdown-menu-icon-size);
+          margin-right: 8px;
+        }
+        .anchor:disabled {
+          color: var(--chops-button-disabled-color);
+        }
+        button.anchor {
+          box-sizing: border-box;
+          background: none;
+          border: none;
+          font-size: inherit;
+          width: 100%;
+          height: 100%;
+          display: flex;
+          align-items: center;
+          justify-content: var(--mr-dropdown-anchor-justify-content);
+          cursor: pointer;
+          padding: var(--mr-dropdown-anchor-padding);
+          color: var(--chops-link-color);
+          font-weight: var(--mr-dropdown-anchor-font-weight);
+          font-family: inherit;
+        }
+        /* menuAlignment options: right, left, side. */
+        .menu.right {
+          right: 0px;
+        }
+        .menu.left {
+          left: 0px;
+        }
+        .menu.side {
+          left: 100%;
+          top: 0;
+        }
+        .menu {
+          font-size: var(--mr-dropdown-menu-font-size);
+          position: absolute;
+          min-width: var(--mr-dropdown-menu-min-width);
+          max-height: var(--mr-dropdown-menu-max-height);
+          overflow: var(--mr-dropdown-menu-overflow);
+          top: 90%;
+          display: block;
+          background: var(--chops-white);
+          border: var(--chops-accessible-border);
+          z-index: 990;
+          box-shadow: 2px 3px 8px 0px hsla(0, 0%, 0%, 0.3);
+          font-family: inherit;
+        }
+        .menu-item {
+          background: none;
+          margin: 0;
+          border: 0;
+          box-sizing: border-box;
+          text-decoration: none;
+          white-space: nowrap;
+          display: flex;
+          align-items: center;
+          justify-content: left;
+          width: 100%;
+          padding: 0.25em 8px;
+          transition: 0.2s background ease-in-out;
+
+        }
+        .menu-item[hidden] {
+          display: none;
+        }
+        mr-dropdown.menu-item {
+          width: 100%;
+          padding: 0;
+          --mr-dropdown-anchor-padding: 0.25em 8px;
+          --mr-dropdown-anchor-justify-content: space-between;
+        }
+        .menu hr {
+          width: 96%;
+          margin: 0 2%;
+          border: 0;
+          height: 1px;
+          background: hsl(0, 0%, 80%);
+        }
+        .menu a {
+          cursor: pointer;
+          color: var(--chops-link-color);
+        }
+        .menu a:hover, .menu a:focus {
+          background: var(--chops-active-choice-bg);
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <button class="anchor"
+        @click=${this.toggle}
+        @keydown=${this._exitMenuOnEsc}
+        ?disabled=${this.disabled}
+        title=${this.title || this.label}
+        aria-label=${this.label}
+        aria-expanded=${this.opened}
+      >
+        ${this.text}
+        <i class="material-icons" aria-hidden="true">${this.icon}</i>
+      </button>
+      <div class="menu ${this.menuAlignment}">
+        ${this.items.map((item, index) => this._renderItem(item, index))}
+        <slot></slot>
+      </div>
+    `;
+  }
+
+  /**
+   * Render a single dropdown menu item.
+   * @param {MenuItem} item
+   * @param {number} index The item's position in the list of items.
+   * @return {TemplateResult}
+   */
+  _renderItem(item, index) {
+    if (item.separator) {
+      // The menu item is a no-op divider between sections.
+      return html`
+        <strong ?hidden=${!item.text} class="menu-item">
+          ${item.text}
+        </strong>
+        <hr />
+      `;
+    }
+    if (item.items && item.items.length) {
+      // The menu contains a sub-menu.
+      return html`
+        <mr-dropdown
+          .text=${item.text}
+          .items=${item.items}
+          menuAlignment="side"
+          icon="arrow_right"
+          data-idx=${index}
+          class="menu-item"
+        ></mr-dropdown>
+      `;
+    }
+
+    return html`
+      <a
+        href=${ifDefined(item.url)}
+        @click=${this._runItemHandler}
+        @keydown=${this._onItemKeydown}
+        data-idx=${index}
+        tabindex="0"
+        class="menu-item"
+      >
+        <i
+          class="material-icons"
+          ?hidden=${item.icon === undefined}
+        >${item.icon}</i>
+        ${item.text}
+      </a>
+    `;
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.label = '';
+    this.text = '';
+    this.items = [];
+    this.icon = 'arrow_drop_down';
+    this.menuAlignment = 'right';
+    this.opened = false;
+    this.disabled = false;
+
+    this._boundCloseOnOutsideClick = this._closeOnOutsideClick.bind(this);
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      title: {type: String},
+      label: {type: String},
+      text: {type: String},
+      items: {type: Array},
+      icon: {type: String},
+      menuAlignment: {type: String},
+      opened: {type: Boolean, reflect: true},
+      disabled: {type: Boolean},
+    };
+  }
+
+  /**
+   * Either runs the click handler attached to the clicked item and closes the
+   * menu.
+   * @param {MouseEvent|KeyboardEvent} e
+   */
+  _runItemHandler(e) {
+    if (e instanceof MouseEvent || e.code === 'Enter') {
+      const idx = e.target.dataset.idx;
+      if (idx !== undefined && this.items[idx].handler) {
+        this.items[idx].handler();
+      }
+      this.close();
+    }
+  }
+
+  /**
+   * Runs multiple event handlers when a user types a key while
+   * focusing a menu item.
+   * @param {KeyboardEvent} e
+   */
+  _onItemKeydown(e) {
+    this._runItemHandler(e);
+    this._exitMenuOnEsc(e);
+  }
+
+  /**
+   * If the user types Esc while focusing any dropdown item, then
+   * exit the dropdown.
+   * @param {KeyboardEvent} e
+   */
+  _exitMenuOnEsc(e) {
+    if (e.key === 'Escape') {
+      this.close();
+
+      // Return focus to the anchor of the dropdown on closing, so that
+      // users don't lose their overall focus position within the page.
+      const anchor = this.shadowRoot.querySelector('.anchor');
+      anchor.focus();
+    }
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+    window.addEventListener('click', this._boundCloseOnOutsideClick, true);
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+    window.removeEventListener('click', this._boundCloseOnOutsideClick, true);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('label') || changedProperties.has('text')) {
+      if (!this.label && !this.text) {
+        console.error(SCREENREADER_ATTRIBUTE_ERROR);
+      }
+    }
+  }
+
+  /**
+   * Closes and opens the dropdown menu.
+   */
+  toggle() {
+    this.opened = !this.opened;
+  }
+
+  /**
+   * Opens the dropdown menu.
+   */
+  open() {
+    this.opened = true;
+  }
+
+  /**
+   * Closes the dropdown menu.
+   */
+  close() {
+    this.opened = false;
+  }
+
+  /**
+   * Click a specific item in mr-dropdown, using JavaScript. Useful for testing.
+   *
+   * @param {number} i index of the item to click.
+   */
+  clickItem(i) {
+    const items = this.shadowRoot.querySelectorAll('.menu-item');
+    items[i].click();
+  }
+
+  /**
+   * @param {MouseEvent} evt
+   * @private
+   */
+  _closeOnOutsideClick(evt) {
+    if (!this.opened) return;
+
+    const hasMenu = evt.composedPath().find(
+        (node) => {
+          return node === this;
+        },
+    );
+    if (hasMenu) return;
+
+    this.close();
+  }
+}
+
+customElements.define('mr-dropdown', MrDropdown);
diff --git a/static_src/elements/framework/mr-dropdown/mr-dropdown.test.js b/static_src/elements/framework/mr-dropdown/mr-dropdown.test.js
new file mode 100644
index 0000000..51f8ce9
--- /dev/null
+++ b/static_src/elements/framework/mr-dropdown/mr-dropdown.test.js
@@ -0,0 +1,276 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrDropdown, SCREENREADER_ATTRIBUTE_ERROR} from './mr-dropdown.js';
+import sinon from 'sinon';
+
+let element;
+let randomButton;
+
+describe('mr-dropdown', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-dropdown');
+    document.body.appendChild(element);
+    element.label = 'new dropdown';
+
+    randomButton = document.createElement('button');
+    document.body.appendChild(randomButton);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    document.body.removeChild(randomButton);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrDropdown);
+  });
+
+  it('warns users about accessibility when no label or text', async () => {
+    element.label = 'ok';
+    sinon.spy(console, 'error');
+
+    await element.updateComplete;
+    sinon.assert.notCalled(console.error);
+
+    element.label = undefined;
+
+    await element.updateComplete;
+    sinon.assert.calledWith(console.error, SCREENREADER_ATTRIBUTE_ERROR);
+
+    console.error.restore();
+  });
+
+  it('toggle changes opened state', () => {
+    element.open();
+    assert.isTrue(element.opened);
+
+    element.close();
+    assert.isFalse(element.opened);
+
+    element.toggle();
+    assert.isTrue(element.opened);
+
+    element.toggle();
+    assert.isFalse(element.opened);
+
+    element.toggle();
+    element.toggle();
+    assert.isFalse(element.opened);
+  });
+
+  it('clicking outside element closes menu', () => {
+    element.open();
+    assert.isTrue(element.opened);
+
+    randomButton.click();
+
+    assert.isFalse(element.opened);
+  });
+
+  it('escape while focusing the anchor closes menu', async () => {
+    element.open();
+    await element.updateComplete;
+
+    assert.isTrue(element.opened);
+
+    const anchor = element.shadowRoot.querySelector('.anchor');
+    anchor.dispatchEvent(new KeyboardEvent('keydown', {key: 'Escape'}));
+
+    assert.isFalse(element.opened);
+  });
+
+  it('other key while focusing the anchor does not close menu', async () => {
+    element.open();
+    await element.updateComplete;
+
+    assert.isTrue(element.opened);
+
+    const anchor = element.shadowRoot.querySelector('.anchor');
+    anchor.dispatchEvent(new KeyboardEvent('keydown', {key: 'Enter'}));
+
+    assert.isTrue(element.opened);
+  });
+
+  it('escape while focusing an item closes the menu', async () => {
+    element.items = [{text: 'An item'}];
+    element.open();
+    await element.updateComplete;
+
+    assert.isTrue(element.opened);
+
+    const item = element.shadowRoot.querySelector('.menu-item');
+    item.dispatchEvent(new KeyboardEvent('keydown', {key: 'Escape'}));
+
+    assert.isFalse(element.opened);
+  });
+
+  it('icon hidden when undefined', async () => {
+    element.items = [
+      {text: 'test'},
+    ];
+
+    await element.updateComplete;
+
+    const icon = element.shadowRoot.querySelector(
+        '.menu-item > .material-icons');
+
+    assert.isTrue(icon.hidden);
+  });
+
+  it('icon shown when defined, even as empty string', async () => {
+    element.items = [
+      {text: 'test', icon: ''},
+    ];
+
+    await element.updateComplete;
+
+    const icon = element.shadowRoot.querySelector(
+        '.menu-item > .material-icons');
+
+    assert.isFalse(icon.hidden);
+    assert.equal(icon.textContent.trim(), '');
+  });
+
+  it('icon shown when set to material icon', async () => {
+    element.items = [
+      {text: 'test', icon: 'check'},
+    ];
+
+    await element.updateComplete;
+
+    const icon = element.shadowRoot.querySelector(
+        '.menu-item > .material-icons');
+
+    assert.isFalse(icon.hidden);
+    assert.equal(icon.textContent.trim(), 'check');
+  });
+
+  it('items with handlers are handled', async () => {
+    const handler1 = sinon.spy();
+    const handler2 = sinon.spy();
+    const handler3 = sinon.spy();
+
+    element.items = [
+      {
+        url: '#',
+        text: 'blah',
+        handler: handler1,
+      },
+      {
+        url: '#',
+        text: 'rutabaga noop',
+        handler: handler2,
+      },
+      {
+        url: '#',
+        text: 'click me please',
+        handler: handler3,
+      },
+    ];
+
+    element.open();
+
+    await element.updateComplete;
+
+    element.clickItem(0);
+
+    assert.isTrue(handler1.calledOnce);
+    assert.isFalse(handler2.called);
+    assert.isFalse(handler3.called);
+
+    element.clickItem(2);
+
+    assert.isTrue(handler1.calledOnce);
+    assert.isFalse(handler2.called);
+    assert.isTrue(handler3.calledOnce);
+  });
+
+  describe('nested dropdown menus', () => {
+    beforeEach(() => {
+      element.items = [
+        {
+          text: 'test',
+          items: [
+            {text: 'item 1'},
+            {text: 'item 2'},
+            {text: 'item 3'},
+          ],
+        },
+      ];
+
+      element.open();
+    });
+
+    it('nested dropdown menu renders', async () => {
+      await element.updateComplete;
+
+      const nestedDropdown = element.shadowRoot.querySelector('mr-dropdown');
+
+      assert.equal(nestedDropdown.text, 'test');
+      assert.deepEqual(nestedDropdown.items, [
+        {text: 'item 1'},
+        {text: 'item 2'},
+        {text: 'item 3'},
+      ]);
+    });
+
+    it('clicking nested item with handler calls handler', async () => {
+      const handler = sinon.stub();
+      element.items = [{
+        text: 'test',
+        items: [
+          {text: 'item 1'},
+          {
+            text: 'item with handler',
+            handler,
+          },
+        ],
+      }];
+
+      await element.updateComplete;
+
+      const nestedDropdown = element.shadowRoot.querySelector('mr-dropdown');
+
+      nestedDropdown.open();
+      await element.updateComplete;
+
+      // Clicking an unrelated nested item shouldn't call the handler.
+      nestedDropdown.clickItem(0);
+      // Nor should clicking the parent item call the handler.
+      element.clickItem(0);
+      sinon.assert.notCalled(handler);
+
+      element.open();
+      nestedDropdown.open();
+      await element.updateComplete;
+
+      nestedDropdown.clickItem(1);
+      sinon.assert.calledOnce(handler);
+    });
+
+    it('clicking nested dropdown menu toggles nested menu', async () => {
+      await element.updateComplete;
+
+      const nestedDropdown = element.shadowRoot.querySelector('mr-dropdown');
+      const nestedAnchor = nestedDropdown.shadowRoot.querySelector('.anchor');
+
+      assert.isTrue(element.opened);
+      assert.isFalse(nestedDropdown.opened);
+
+      nestedAnchor.click();
+      await element.updateComplete;
+
+      assert.isTrue(element.opened);
+      assert.isTrue(nestedDropdown.opened);
+
+      nestedAnchor.click();
+      await element.updateComplete;
+
+      assert.isTrue(element.opened);
+      assert.isFalse(nestedDropdown.opened);
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-error/mr-error.js b/static_src/elements/framework/mr-error/mr-error.js
new file mode 100644
index 0000000..084a326
--- /dev/null
+++ b/static_src/elements/framework/mr-error/mr-error.js
@@ -0,0 +1,51 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+
+/**
+ * `<mr-error>`
+ *
+ * A container for showing errors.
+ *
+ */
+export class MrError extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: flex;
+        align-items: center;
+        flex-direction: row;
+        justify-content: flex-start;
+        box-sizing: border-box;
+        width: 100%;
+        margin: 0.5em 0;
+        padding: 0.25em 8px;
+        border: 1px solid #B71C1C;
+        border-radius: 4px;
+        background: #FFEBEE;
+      }
+      :host([hidden]) {
+        display: none;
+      }
+      i.material-icons {
+        color: #B71C1C;
+        margin-right: 4px;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <i class="material-icons">close</i>
+      <slot></slot>
+    `;
+  }
+}
+
+customElements.define('mr-error', MrError);
diff --git a/static_src/elements/framework/mr-header/mr-header.js b/static_src/elements/framework/mr-header/mr-header.js
new file mode 100644
index 0000000..6603c85
--- /dev/null
+++ b/static_src/elements/framework/mr-header/mr-header.js
@@ -0,0 +1,427 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+import {prpcClient} from 'prpc-client-instance.js';
+import 'elements/framework/mr-keystrokes/mr-keystrokes.js';
+import '../mr-dropdown/mr-dropdown.js';
+import '../mr-dropdown/mr-account-dropdown.js';
+import './mr-search-bar.js';
+
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+import {logEvent} from 'monitoring/client-logger.js';
+
+/**
+ * @type {Object<string, string>} JS coding of enum values from
+ *    appengine/monorail/api/v3/api_proto/project_objects.proto.
+ */
+const projectRoles = Object.freeze({
+  OWNER: 'Owner',
+  MEMBER: 'Member',
+  CONTRIBUTOR: 'Contributor',
+  NONE: '',
+});
+
+/**
+ * `<mr-header>`
+ *
+ * The header for Monorail.
+ *
+ */
+export class MrHeader extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          color: var(--chops-header-text-color);
+          box-sizing: border-box;
+          background: hsl(221, 67%, 92%);
+          width: 100%;
+          height: var(--monorail-header-height);
+          display: flex;
+          flex-direction: row;
+          justify-content: flex-start;
+          align-items: center;
+          z-index: 800;
+          background-color: var(--chops-primary-header-bg);
+          border-bottom: var(--chops-normal-border);
+          top: 0;
+          position: fixed;
+          padding: 0 4px;
+          font-size: var(--chops-large-font-size);
+        }
+        @media (max-width: 840px) {
+          :host {
+            position: static;
+          }
+        }
+        a {
+          font-size: inherit;
+          color: var(--chops-link-color);
+          text-decoration: none;
+          display: flex;
+          align-items: center;
+          justify-content: center;
+          height: 100%;
+          padding: 0 4px;
+          flex-grow: 0;
+          flex-shrink: 0;
+        }
+        a[hidden] {
+          display: none;
+        }
+        a.button {
+          font-size: inherit;
+          height: auto;
+          margin: 0 8px;
+          border: 0;
+          height: 30px;
+        }
+        .home-link {
+          color: var(--chops-gray-900);
+          letter-spacing: 0.5px;
+          font-size: 18px;
+          font-weight: 400;
+          display: flex;
+          font-stretch: 100%;
+          padding-left: 8px;
+        }
+        a.home-link img {
+          /** Cover up default padding with the custom logo. */
+          margin-left: -8px;
+        }
+        a.home-link:hover {
+          text-decoration: none;
+        }
+        mr-search-bar {
+          margin-left: 8px;
+          flex-grow: 2;
+          max-width: 1000px;
+        }
+        i.material-icons {
+          font-size: var(--chops-icon-font-size);
+          color: var(--chops-primary-icon-color);
+        }
+        i.material-icons[hidden] {
+          display: none;
+        }
+        .right-section {
+          font-size: inherit;
+          display: flex;
+          align-items: center;
+          height: 100%;
+          margin-left: auto;
+          justify-content: flex-end;
+        }
+        .hamburger-icon:hover {
+          text-decoration: none;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return this.projectName ?
+        this._renderProjectScope() : this._renderNonProjectScope();
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderProjectScope() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <mr-keystrokes
+        .issueId=${this.queryParams.id}
+        .queryParams=${this.queryParams}
+        .issueEntryUrl=${this.issueEntryUrl}
+      ></mr-keystrokes>
+      <a href="/p/${this.projectName}/issues/list" class="home-link">
+        ${this.projectThumbnailUrl ? html`
+          <img
+            class="project-logo"
+            src=${this.projectThumbnailUrl}
+            title=${this.projectName}
+          />
+        ` : this.projectName}
+      </a>
+      <mr-dropdown
+        class="project-selector"
+        .text=${this.projectName}
+        .items=${this._projectDropdownItems}
+        menuAlignment="left"
+        title=${this.presentationConfig.projectSummary}
+      ></mr-dropdown>
+      <a class="button emphasized new-issue-link" href=${this.issueEntryUrl}>
+        New issue
+      </a>
+      <mr-search-bar
+        .projectName=${this.projectName}
+        .userDisplayName=${this.userDisplayName}
+        .projectSavedQueries=${this.presentationConfig.savedQueries}
+        .initialCan=${this._currentCan}
+        .initialQuery=${this._currentQuery}
+        .queryParams=${this.queryParams}
+      ></mr-search-bar>
+
+      <div class="right-section">
+        <mr-dropdown
+          icon="settings"
+          label="Project Settings"
+          .items=${this._projectSettingsItems}
+        ></mr-dropdown>
+
+        ${this._renderAccount()}
+      </div>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderNonProjectScope() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <a class="hamburger-icon" title="Main menu" hidden>
+        <i class="material-icons">menu</i>
+      </a>
+      ${this._headerTitle ?
+          html`<span class="home-link">${this._headerTitle}</span>` :
+          html`<a href="/" class="home-link">Monorail</a>`}
+
+      <div class="right-section">
+        ${this._renderAccount()}
+      </div>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderAccount() {
+    if (!this.userDisplayName) {
+      return html`<a href=${this.loginUrl}>Sign in</a>`;
+    }
+
+    return html`
+      <mr-account-dropdown
+        .userDisplayName=${this.userDisplayName}
+        .logoutUrl=${this.logoutUrl}
+        .loginUrl=${this.loginUrl}
+      ></mr-account-dropdown>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      loginUrl: {type: String},
+      logoutUrl: {type: String},
+      projectName: {type: String},
+      // Project thumbnail is set separately from presentationConfig to prevent
+      // "flashing" logo when navigating EZT pages.
+      projectThumbnailUrl: {type: String},
+      userDisplayName: {type: String},
+      isSiteAdmin: {type: Boolean},
+      userProjects: {type: Object},
+      presentationConfig: {type: Object},
+      queryParams: {type: Object},
+      // TODO(zhangtiff): Change this to be dynamically computed by the
+      //   frontend with logic similar to ComputeIssueEntryURL().
+      issueEntryUrl: {type: String},
+      clientLogger: {type: Object},
+      _headerTitle: {type: String},
+      _currentQuery: {type: String},
+      _currentCan: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.presentationConfig = {};
+    this.userProjects = {};
+    this.isSiteAdmin = false;
+
+    this._headerTitle = '';
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.projectName = projectV0.viewedProjectName(state);
+
+    this.userProjects = userV0.projects(state);
+
+    const currentUser = userV0.currentUser(state);
+    this.isSiteAdmin = currentUser ? currentUser.isSiteAdmin : false;
+
+    const presentationConfig = projectV0.viewedPresentationConfig(state);
+    this.presentationConfig = presentationConfig;
+    // Set separately in order allow EZT pages to load project logo before
+    // the GetPresentationConfig pRPC request.
+    this.projectThumbnailUrl = presentationConfig.projectThumbnailUrl;
+
+    this._headerTitle = sitewide.headerTitle(state);
+
+    this._currentQuery = sitewide.currentQuery(state);
+    this._currentCan = sitewide.currentCan(state);
+
+    this.queryParams = sitewide.queryParams(state);
+  }
+
+  /**
+   * @return {boolean} whether the currently logged in user has admin
+   *   privileges for the currently viewed project.
+   */
+  get canAdministerProject() {
+    if (!this.userDisplayName) return false; // Not logged in.
+    if (this.isSiteAdmin) return true;
+    if (!this.userProjects || !this.userProjects.ownerOf) return false;
+    return this.userProjects.ownerOf.includes(this.projectName);
+  }
+
+  /**
+   * @return {string} The name of the role the user has in the viewed project.
+   */
+  get roleInCurrentProject() {
+    if (!this.userProjects || !this.projectName) return projectRoles.NONE;
+    const {ownerOf = [], memberOf = [], contributorTo = []} = this.userProjects;
+
+    if (ownerOf.includes(this.projectName)) return projectRoles.OWNER;
+    if (memberOf.includes(this.projectName)) return projectRoles.MEMBER;
+    if (contributorTo.includes(this.projectName)) {
+      return projectRoles.CONTRIBUTOR;
+    }
+
+    return projectRoles.NONE;
+  }
+
+  // TODO(crbug.com/monorail/6891): Remove once we deprecate the old issue
+  // filing wizard.
+  /**
+   * @return {string} A URL for the page the issue filing wizard posts to.
+   */
+  get _wizardPostUrl() {
+    // The issue filing wizard posts to the legacy issue entry page's ".do"
+    // endpoint.
+    return `${this._origin}/p/${this.projectName}/issues/entry.do`;
+  }
+
+  /**
+   * @return {string} The domain name of the current page.
+   */
+  get _origin() {
+    return window.location.origin;
+  }
+
+  /**
+   * Computes the URL the user should see to a file an issue, accounting
+   * for the case where a project has a customIssueEntryUrl to navigate to
+   * the wizard as well.
+   * @return {string} The URL that "New issue" button goes to.
+   */
+  get issueEntryUrl() {
+    const config = this.presentationConfig;
+    const role = this.roleInCurrentProject;
+    const mayBeRedirectedToWizard = role === projectRoles.NONE;
+    if (!this.userDisplayName || !config || !config.customIssueEntryUrl ||
+        !mayBeRedirectedToWizard) {
+      return `/p/${this.projectName}/issues/entry`;
+    }
+
+    const token = prpcClient.token;
+
+    const customUrl = this.presentationConfig.customIssueEntryUrl;
+
+    return `${customUrl}?token=${token}&role=${
+      role}&continue=${this._wizardPostUrl}`;
+  }
+
+  /**
+   * @return {Array<MenuItem>} the dropdown items for the project selector,
+   *   showing which projects a user can switch to.
+   */
+  get _projectDropdownItems() {
+    const {userProjects, loginUrl} = this;
+    if (!this.userDisplayName) {
+      return [{text: 'Sign in to see your projects', url: loginUrl}];
+    }
+
+    const items = [];
+    const starredProjects = userProjects.starredProjects || [];
+    const projects = (userProjects.ownerOf || [])
+        .concat(userProjects.memberOf || [])
+        .concat(userProjects.contributorTo || []);
+
+    if (projects.length) {
+      projects.sort();
+      items.push({text: 'My Projects', separator: true});
+
+      projects.forEach((project) => {
+        items.push({text: project, url: `/p/${project}/issues/list`});
+      });
+    }
+
+    if (starredProjects.length) {
+      starredProjects.sort();
+      items.push({text: 'Starred Projects', separator: true});
+
+      starredProjects.forEach((project) => {
+        items.push({text: project, url: `/p/${project}/issues/list`});
+      });
+    }
+
+    if (items.length) {
+      items.push({separator: true});
+    }
+
+    items.push({text: 'All projects', url: '/hosting/'});
+    items.forEach((item) => {
+      item.handler = () => this._projectChangedHandler(item.url);
+    });
+    return items;
+  }
+
+  /**
+   * @return {Array<MenuItem>} dropdown menu items to show in the project
+   *   settings menu.
+   */
+  get _projectSettingsItems() {
+    const {projectName, canAdministerProject} = this;
+    const items = [
+      {text: 'People', url: `/p/${projectName}/people/list`},
+      {text: 'Development Process', url: `/p/${projectName}/adminIntro`},
+      {text: 'History', url: `/p/${projectName}/updates/list`},
+    ];
+
+    if (canAdministerProject) {
+      items.push({separator: true});
+      items.push({text: 'Administer', url: `/p/${projectName}/admin`});
+    }
+    return items;
+  }
+
+  /**
+   * Records Google Analytics events for when users change projects using
+   * the selector.
+   * @param {string} url which project URL the user is navigating to.
+   */
+  _projectChangedHandler(url) {
+    // Just log it to GA and continue.
+    logEvent('mr-header', 'project-change', url);
+  }
+}
+
+customElements.define('mr-header', MrHeader);
diff --git a/static_src/elements/framework/mr-header/mr-header.test.js b/static_src/elements/framework/mr-header/mr-header.test.js
new file mode 100644
index 0000000..277347f
--- /dev/null
+++ b/static_src/elements/framework/mr-header/mr-header.test.js
@@ -0,0 +1,191 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {prpcClient} from 'prpc-client-instance.js';
+import {MrHeader} from './mr-header.js';
+
+
+window.CS_env = {
+  token: 'foo-token',
+};
+
+let element;
+
+describe('mr-header', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-header');
+    document.body.appendChild(element);
+
+    window.ga = sinon.stub();
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrHeader);
+  });
+
+  it('presentationConfig renders', async () => {
+    element.projectName = 'best-project';
+    element.projectThumbnailUrl = 'http://images.google.com/';
+    element.presentationConfig = {
+      projectSummary: 'The best project',
+    };
+
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.querySelector('.project-logo').src,
+        'http://images.google.com/');
+
+    assert.endsWith(element.shadowRoot.querySelector('.new-issue-link').href,
+        '/p/best-project/issues/entry');
+
+    assert.equal(element.shadowRoot.querySelector('.project-selector').title,
+        'The best project');
+  });
+
+  describe('issueEntryUrl', () => {
+    let oldToken;
+
+    beforeEach(() => {
+      oldToken = prpcClient.token;
+      prpcClient.token = 'token1';
+
+      element.projectName = 'proj';
+
+      sinon.stub(element, '_origin').get(() => 'http://localhost');
+    });
+
+    afterEach(() => {
+      prpcClient.token = oldToken;
+    });
+
+    it('updates on project change', async () => {
+      await element.updateComplete;
+
+      assert.endsWith(element.shadowRoot.querySelector('.new-issue-link').href,
+          '/p/proj/issues/entry');
+
+      element.projectName = 'the-best-project';
+
+      await element.updateComplete;
+
+      assert.endsWith(element.shadowRoot.querySelector('.new-issue-link').href,
+          '/p/the-best-project/issues/entry');
+    });
+
+    it('generates wizard URL when customIssueEntryUrl defined', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {ownerOf: ['not-proj']};
+      element.userDisplayName = 'test@example.com';
+      assert.equal(element.issueEntryUrl,
+          'https://issue.wizard?token=token1&role=&' +
+          'continue=http://localhost/p/proj/issues/entry.do');
+    });
+
+    it('uses default issue filing URL when user is not logged in', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userDisplayName = '';
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+
+    it('uses default issue filing URL when user is project owner', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {ownerOf: ['proj']};
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+
+    it('uses default issue filing URL when user is project member', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {memberOf: ['proj']};
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+
+    it('uses default issue filing URL when user is project contributor', () => {
+      element.presentationConfig = {customIssueEntryUrl: 'https://issue.wizard'};
+      element.userProjects = {contributorTo: ['proj']};
+      assert.equal(element.issueEntryUrl, '/p/proj/issues/entry');
+    });
+  });
+
+
+  it('canAdministerProject is false when user is not logged in', () => {
+    element.userDisplayName = '';
+
+    assert.isFalse(element.canAdministerProject);
+  });
+
+  it('canAdministerProject is true when user is site admin', () => {
+    element.userDisplayName = 'test@example.com';
+    element.isSiteAdmin = true;
+
+    assert.isTrue(element.canAdministerProject);
+
+    element.isSiteAdmin = false;
+
+    assert.isFalse(element.canAdministerProject);
+  });
+
+  it('canAdministerProject is true when user is owner', () => {
+    element.userDisplayName = 'test@example.com';
+    element.isSiteAdmin = false;
+
+    element.projectName = 'chromium';
+    element.userProjects = {ownerOf: ['chromium']};
+
+    assert.isTrue(element.canAdministerProject);
+
+    element.projectName = 'v8';
+
+    assert.isFalse(element.canAdministerProject);
+
+    element.userProjects = {memberOf: ['v8']};
+
+    assert.isFalse(element.canAdministerProject);
+  });
+
+  it('_projectDropdownItems tells user to sign in if not logged in', () => {
+    element.userDisplayName = '';
+    element.loginUrl = 'http://login';
+
+    const items = element._projectDropdownItems;
+
+    // My Projects
+    assert.deepEqual(items[0], {
+      text: 'Sign in to see your projects',
+      url: 'http://login',
+    });
+  });
+
+  it('_projectDropdownItems computes projects for user', () => {
+    element.userProjects = {
+      ownerOf: ['chromium'],
+      memberOf: ['v8'],
+      contributorTo: ['skia'],
+      starredProjects: ['gerrit'],
+    };
+    element.userDisplayName = 'test@example.com';
+
+    const items = element._projectDropdownItems;
+
+    // TODO(http://crbug.com/monorail/6236): Replace these checks with
+    // deepInclude once we upgrade Chai.
+    // My Projects
+    assert.equal(items[1].text, 'chromium');
+    assert.equal(items[1].url, '/p/chromium/issues/list');
+    assert.equal(items[2].text, 'skia');
+    assert.equal(items[2].url, '/p/skia/issues/list');
+    assert.equal(items[3].text, 'v8');
+    assert.equal(items[3].url, '/p/v8/issues/list');
+
+    // Starred Projects
+    assert.equal(items[5].text, 'gerrit');
+    assert.equal(items[5].url, '/p/gerrit/issues/list');
+  });
+});
diff --git a/static_src/elements/framework/mr-header/mr-search-bar.js b/static_src/elements/framework/mr-header/mr-search-bar.js
new file mode 100644
index 0000000..536dfcf
--- /dev/null
+++ b/static_src/elements/framework/mr-header/mr-search-bar.js
@@ -0,0 +1,501 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import page from 'page';
+import qs from 'qs';
+
+import '../mr-dropdown/mr-dropdown.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import ClientLogger from 'monitoring/client-logger';
+import {issueRefToUrl} from 'shared/convertersV0.js';
+
+// Search field input regex testing for all digits
+// indicating that the user wants to jump to the specified issue.
+const JUMP_RE = /^\d+$/;
+
+/**
+ * `<mr-search-bar>`
+ *
+ * The searchbar for Monorail.
+ *
+ */
+export class MrSearchBar extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        --mr-search-bar-background: var(--chops-white);
+        --mr-search-bar-border-radius: 4px;
+        --mr-search-bar-border: var(--chops-normal-border);
+        --mr-search-bar-chip-color: var(--chops-gray-200);
+        height: 30px;
+        font-size: var(--chops-large-font-size);
+      }
+      input#searchq {
+        display: flex;
+        align-items: center;
+        justify-content: flex-start;
+        flex-grow: 2;
+        min-width: 100px;
+        border: none;
+        border-top: var(--mr-search-bar-border);
+        border-bottom: var(--mr-search-bar-border);
+        background: var(--mr-search-bar-background);
+        height: 100%;
+        box-sizing: border-box;
+        padding: 0 2px;
+        font-size: inherit;
+      }
+      mr-dropdown {
+        text-align: right;
+        display: flex;
+        text-overflow: ellipsis;
+        box-sizing: border-box;
+        background: var(--mr-search-bar-background);
+        border: var(--mr-search-bar-border);
+        border-left: 0;
+        border-radius: 0 var(--mr-search-bar-border-radius)
+          var(--mr-search-bar-border-radius) 0;
+        height: 100%;
+        align-items: center;
+        justify-content: center;
+        text-decoration: none;
+      }
+      button {
+        font-size: inherit;
+        order: -1;
+        background: var(--mr-search-bar-background);
+        cursor: pointer;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        height: 100%;
+        box-sizing: border-box;
+        border: var(--mr-search-bar-border);
+        border-left: none;
+        border-right: none;
+        padding: 0 8px;
+      }
+      form {
+        display: flex;
+        height: 100%;
+        width: 100%;
+        align-items: center;
+        justify-content: flex-start;
+        flex-direction: row;
+      }
+      i.material-icons {
+        font-size: var(--chops-icon-font-size);
+        color: var(--chops-primary-icon-color);
+      }
+      .select-container {
+        order: -2;
+        max-width: 150px;
+        min-width: 50px;
+        flex-shrink: 1;
+        height: 100%;
+        position: relative;
+        box-sizing: border-box;
+        border: var(--mr-search-bar-border);
+        border-radius: var(--mr-search-bar-border-radius) 0 0
+          var(--mr-search-bar-border-radius);
+        background: var(--mr-search-bar-chip-color);
+      }
+      .select-container i.material-icons {
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        position: absolute;
+        right: 0;
+        top: 0;
+        height: 100%;
+        width: 20px;
+        z-index: 2;
+        padding: 0;
+      }
+      select {
+        color: var(--chops-primary-font-color);
+        display: flex;
+        align-items: center;
+        justify-content: flex-start;
+        -webkit-appearance: none;
+        -moz-appearance: none;
+        appearance: none;
+        text-overflow: ellipsis;
+        cursor: pointer;
+        width: 100%;
+        height: 100%;
+        background: none;
+        margin: 0;
+        padding: 0 20px 0 8px;
+        box-sizing: border-box;
+        border: 0;
+        z-index: 3;
+        font-size: inherit;
+        position: relative;
+      }
+      select::-ms-expand {
+        display: none;
+      }
+      select::after {
+        position: relative;
+        right: 0;
+        content: 'arrow_drop_down';
+        font-family: 'Material Icons';
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <form
+        @submit=${this._submitSearch}
+        @keypress=${this._submitSearchWithKeypress}
+      >
+        ${this._renderSearchScopeSelector()}
+        <input
+          id="searchq"
+          type="text"
+          name="q"
+          placeholder="Search ${this.projectName} issues..."
+          .value=${this.initialQuery || ''}
+          autocomplete="off"
+          aria-label="Search box"
+          @focus=${this._searchEditStarted}
+          @blur=${this._searchEditFinished}
+          spellcheck="false"
+        />
+        <button type="submit">
+          <i class="material-icons">search</i>
+        </button>
+        <mr-dropdown
+          label="Search options"
+          .items=${this._searchMenuItems}
+        ></mr-dropdown>
+      </form>
+    `;
+  }
+
+  /**
+   * Render helper for the select menu that lets user select which search
+   * context/saved query they want to use.
+   * @return {TemplateResult}
+   */
+  _renderSearchScopeSelector() {
+    return html`
+      <div class="select-container">
+        <i class="material-icons" role="presentation">arrow_drop_down</i>
+        <select
+          id="can"
+          name="can"
+          @change=${this._redirectOnSelect}
+          aria-label="Search scope"
+        >
+          <optgroup label="Search within">
+            <option
+              value="1"
+              ?selected=${this.initialCan === '1'}
+            >All issues</option>
+            <option
+              value="2"
+              ?selected=${this.initialCan === '2'}
+            >Open issues</option>
+            <option
+              value="3"
+              ?selected=${this.initialCan === '3'}
+            >Open and owned by me</option>
+            <option
+              value="4"
+              ?selected=${this.initialCan === '4'}
+            >Open and reported by me</option>
+            <option
+              value="5"
+              ?selected=${this.initialCan === '5'}
+            >Open and starred by me</option>
+            <option
+              value="8"
+              ?selected=${this.initialCan === '8'}
+            >Open with comment by me</option>
+            <option
+              value="6"
+              ?selected=${this.initialCan === '6'}
+            >New issues</option>
+            <option
+              value="7"
+              ?selected=${this.initialCan === '7'}
+            >Issues to verify</option>
+          </optgroup>
+          <optgroup label="Project queries" ?hidden=${!this.userDisplayName}>
+            ${this._renderSavedQueryOptions(this.projectSavedQueries, 'project-query')}
+            <option data-href="/p/${this.projectName}/adminViews">
+              Manage project queries...
+            </option>
+          </optgroup>
+          <optgroup label="My saved queries" ?hidden=${!this.userDisplayName}>
+            ${this._renderSavedQueryOptions(this.userSavedQueries, 'user-query')}
+            <option data-href="/u/${this.userDisplayName}/queries">
+              Manage my saved queries...
+            </option>
+          </optgroup>
+        </select>
+      </div>
+    `;
+  }
+
+  /**
+   * Render helper for adding saved queries to the search scope select.
+   * @param {Array<SavedQuery>} queries Queries to render.
+   * @param {string} className CSS class to be applied to each option.
+   * @return {Array<TemplateResult>}
+   */
+  _renderSavedQueryOptions(queries, className) {
+    if (!queries) return;
+    return queries.map((query) => html`
+      <option
+        class=${className}
+        value=${query.queryId}
+        ?selected=${this.initialCan === query.queryId}
+      >${query.name}</option>
+    `);
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      projectName: {type: String},
+      userDisplayName: {type: String},
+      initialCan: {type: String},
+      initialQuery: {type: String},
+      projectSavedQueries: {type: Array},
+      userSavedQueries: {type: Array},
+      queryParams: {type: Object},
+      keptQueryParams: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.queryParams = {};
+    this.keptQueryParams = [
+      'sort',
+      'groupby',
+      'colspec',
+      'x',
+      'y',
+      'mode',
+      'cells',
+      'num',
+    ];
+    this.initialQuery = '';
+    this.initialCan = '2';
+    this.projectSavedQueries = [];
+    this.userSavedQueries = [];
+
+    this.clientLogger = new ClientLogger('issues');
+
+    this._page = page;
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    // Global event listeners. Make sure to unbind these when the
+    // element disconnects.
+    this._boundFocus = this.focus.bind(this);
+    window.addEventListener('focus-search', this._boundFocus);
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    window.removeEventListener('focus-search', this._boundFocus);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (this.userDisplayName && changedProperties.has('userDisplayName')) {
+      const userSavedQueriesPromise = prpcClient.call('monorail.Users',
+          'GetSavedQueries', {});
+      userSavedQueriesPromise.then((resp) => {
+        this.userSavedQueries = resp.savedQueries;
+      });
+    }
+  }
+
+  /**
+   * Sends an event to ClientLogger describing that the user started typing
+   * a search query.
+   */
+  _searchEditStarted() {
+    this.clientLogger.logStart('query-edit', 'user-time');
+    this.clientLogger.logStart('issue-search', 'user-time');
+  }
+
+  /**
+   * Sends an event to ClientLogger saying that the user finished typing a
+   * search.
+   */
+  _searchEditFinished() {
+    this.clientLogger.logEnd('query-edit');
+  }
+
+  /**
+   * On Shift+Enter, this handler opens the search in a new tab.
+   * @param {KeyboardEvent} e
+   */
+  _submitSearchWithKeypress(e) {
+    if (e.key === 'Enter' && (e.shiftKey)) {
+      const form = e.currentTarget;
+      this._runSearch(form, true);
+    }
+    // In all other cases, we want to let the submit handler do the work.
+    // ie: pressing 'Enter' on a form should natively open it in a new tab.
+  }
+
+  /**
+   * Update the URL on form submit.
+   * @param {Event} e
+   */
+  _submitSearch(e) {
+    e.preventDefault();
+
+    const form = e.target;
+    this._runSearch(form);
+  }
+
+  /**
+   * Updates the URL with the new search set in the query string.
+   * @param {HTMLFormElement} form the native form element to submit.
+   * @param {boolean=} newTab whether to open the search in a new tab.
+   */
+  _runSearch(form, newTab) {
+    this.clientLogger.logEnd('query-edit');
+    this.clientLogger.logPause('issue-search', 'user-time');
+    this.clientLogger.logStart('issue-search', 'computer-time');
+
+    const params = {};
+
+    this.keptQueryParams.forEach((param) => {
+      if (param in this.queryParams) {
+        params[param] = this.queryParams[param];
+      }
+    });
+
+    params.q = form.q.value.trim();
+    params.can = form.can.value;
+
+    this._navigateToNext(params, newTab);
+  }
+
+  /**
+   * Attempt to jump-to-issue, otherwise continue to list view
+   * @param {Object} params URL navigation parameters
+   * @param {boolean} newTab
+   */
+  async _navigateToNext(params, newTab = false) {
+    let resp;
+    if (JUMP_RE.test(params.q)) {
+      const message = {
+        issueRef: {
+          projectName: this.projectName,
+          localId: params.q,
+        },
+      };
+
+      try {
+        resp = await prpcClient.call(
+            'monorail.Issues', 'GetIssue', message,
+        );
+      } catch (error) {
+        // Fall through to navigateToList
+      }
+    }
+    if (resp && resp.issue) {
+      const link = issueRefToUrl(resp.issue, params);
+      this._page(link);
+    } else {
+      this._navigateToList(params, newTab);
+    }
+  }
+
+  /**
+   * Navigate to list view, currently splits on old and new view
+   * @param {Object} params URL navigation parameters
+   * @param {boolean} newTab
+   * @fires Event#refreshList
+   * @private
+   */
+  _navigateToList(params, newTab = false) {
+    const pathname = `/p/${this.projectName}/issues/list`;
+
+    const hasChanges = !window.location.pathname.startsWith(pathname) ||
+      this.queryParams.q !== params.q ||
+      this.queryParams.can !== params.can;
+
+    const url =`${pathname}?${qs.stringify(params)}`;
+
+    if (newTab) {
+      window.open(url, '_blank', 'noopener');
+    } else if (hasChanges) {
+      this._page(url);
+    } else {
+      // TODO(zhangtiff): Replace this event with Redux once all of Monorail
+      // uses Redux.
+      // This is needed because navigating to the exact same page does not
+      // cause a URL change to happen.
+      this.dispatchEvent(new Event('refreshList',
+          {'composed': true, 'bubbles': true}));
+    }
+  }
+
+  /**
+   * Wrap the native focus() function for the search form to allow parent
+   * elements to focus the search.
+   */
+  focus() {
+    const search = this.shadowRoot.querySelector('#searchq');
+    search.focus();
+  }
+
+  /**
+   * Populates the search dropdown.
+   * @return {Array<MenuItem>}
+   */
+  get _searchMenuItems() {
+    const projectName = this.projectName;
+    return [
+      {
+        text: 'Advanced search',
+        url: `/p/${projectName}/issues/advsearch`,
+      },
+      {
+        text: 'Search tips',
+        url: `/p/${projectName}/issues/searchtips`,
+      },
+    ];
+  }
+
+  /**
+   * The search dropdown includes links like "Manage my saved queries..."
+   * that automatically navigate a user to a new page when they select those
+   * options.
+   * @param {Event} evt
+   */
+  _redirectOnSelect(evt) {
+    const target = evt.target;
+    const option = target.options[target.selectedIndex];
+
+    if (option.dataset.href) {
+      this._page(option.dataset.href);
+    }
+  }
+}
+
+customElements.define('mr-search-bar', MrSearchBar);
diff --git a/static_src/elements/framework/mr-header/mr-search-bar.test.js b/static_src/elements/framework/mr-header/mr-search-bar.test.js
new file mode 100644
index 0000000..c758a41
--- /dev/null
+++ b/static_src/elements/framework/mr-header/mr-search-bar.test.js
@@ -0,0 +1,244 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {MrSearchBar} from './mr-search-bar.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import {issueRefToUrl} from 'shared/convertersV0.js';
+import {clientLoggerFake} from 'shared/test/fakes.js';
+
+
+window.CS_env = {
+  token: 'foo-token',
+};
+
+let element;
+
+describe('mr-search-bar', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-search-bar');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrSearchBar);
+  });
+
+  it('render user saved queries', async () => {
+    element.userDisplayName = 'test@user.com';
+    element.userSavedQueries = [
+      {name: 'test query', queryId: 101},
+      {name: 'hello world', queryId: 202},
+    ];
+
+    await element.updateComplete;
+
+    const queryOptions = element.shadowRoot.querySelectorAll(
+        '.user-query');
+
+    assert.equal(queryOptions.length, 2);
+
+    assert.equal(queryOptions[0].value, '101');
+    assert.equal(queryOptions[0].textContent, 'test query');
+
+    assert.equal(queryOptions[1].value, '202');
+    assert.equal(queryOptions[1].textContent, 'hello world');
+  });
+
+  it('render project saved queries', async () => {
+    element.userDisplayName = 'test@user.com';
+    element.projectSavedQueries = [
+      {name: 'test query', queryId: 101},
+      {name: 'hello world', queryId: 202},
+    ];
+
+    await element.updateComplete;
+
+    const queryOptions = element.shadowRoot.querySelectorAll(
+        '.project-query');
+
+    assert.equal(queryOptions.length, 2);
+
+    assert.equal(queryOptions[0].value, '101');
+    assert.equal(queryOptions[0].textContent, 'test query');
+
+    assert.equal(queryOptions[1].value, '202');
+    assert.equal(queryOptions[1].textContent, 'hello world');
+  });
+
+  it('search input resets form value when initialQuery changes', async () => {
+    element.initialQuery = 'first query';
+    await element.updateComplete;
+
+    const queryInput = element.shadowRoot.querySelector('#searchq');
+
+    assert.equal(queryInput.value, 'first query');
+
+    // Simulate a user typing something into the search form.
+    queryInput.value = 'blah';
+
+    element.initialQuery = 'second query';
+    await element.updateComplete;
+
+    // 'blah' disappears because the new initialQuery causes the form to
+    // reset.
+    assert.equal(queryInput.value, 'second query');
+  });
+
+  it('unrelated property changes do not reset query form', async () => {
+    element.initialQuery = 'first query';
+    await element.updateComplete;
+
+    const queryInput = element.shadowRoot.querySelector('#searchq');
+
+    assert.equal(queryInput.value, 'first query');
+
+    // Simulate a user typing something into the search form.
+    queryInput.value = 'blah';
+
+    element.initialCan = '5';
+    await element.updateComplete;
+
+    assert.equal(queryInput.value, 'blah');
+  });
+
+  it('spell check is off for search bar', async () => {
+    await element.updateComplete;
+    const searchElement = element.shadowRoot.querySelector('#searchq');
+    assert.equal(searchElement.getAttribute('spellcheck'), 'false');
+  });
+
+  describe('search form submit', () => {
+    let prpcClientStub;
+    beforeEach(() => {
+      element.clientLogger = clientLoggerFake();
+
+      element._page = sinon.stub();
+      sinon.stub(window, 'open');
+
+      element.projectName = 'chromium';
+      prpcClientStub = sinon.stub(prpcClient, 'call');
+    });
+
+    afterEach(() => {
+      window.open.restore();
+      prpcClient.call.restore();
+    });
+
+    it('prevents default', async () => {
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      // Note: HTMLFormElement's submit function does not run submit handlers
+      // but clicking a submit buttons programmatically works.
+      const event = new Event('submit');
+      sinon.stub(event, 'preventDefault');
+      form.dispatchEvent(event);
+
+      sinon.assert.calledOnce(event.preventDefault);
+    });
+
+    it('uses initial values when no form changes', async () => {
+      element.initialQuery = 'test query';
+      element.initialCan = '3';
+
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      form.dispatchEvent(new Event('submit'));
+
+      sinon.assert.calledOnce(element._page);
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?q=test%20query&can=3');
+    });
+
+    it('adds form values to url', async () => {
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      form.q.value = 'test';
+      form.can.value = '1';
+
+      form.dispatchEvent(new Event('submit'));
+
+      sinon.assert.calledOnce(element._page);
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?q=test&can=1');
+    });
+
+    it('trims query', async () => {
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      form.q.value = '  abc  ';
+      form.can.value = '1';
+
+      form.dispatchEvent(new Event('submit'));
+
+      sinon.assert.calledOnce(element._page);
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?q=abc&can=1');
+    });
+
+    it('jumps to issue for digit-only query', async () => {
+      prpcClientStub.returns(Promise.resolve({issue: 'hello world'}));
+
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      form.q.value = '123';
+      form.can.value = '1';
+
+      form.dispatchEvent(new Event('submit'));
+
+      await element._navigateToNext;
+
+      const expected = issueRefToUrl('hello world', {q: '123', can: '1'});
+      sinon.assert.calledWith(element._page, expected);
+    });
+
+    it('only keeps kept query params', async () => {
+      element.queryParams = {fakeParam: 'test', x: 'Status'};
+      element.keptParams = ['x'];
+
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      form.dispatchEvent(new Event('submit'));
+
+      sinon.assert.calledOnce(element._page);
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?x=Status&q=&can=2');
+    });
+
+    it('on shift+enter opens search in new tab', async () => {
+      await element.updateComplete;
+
+      const form = element.shadowRoot.querySelector('form');
+
+      form.q.value = 'test';
+      form.can.value = '1';
+
+      // Dispatch event from an input in the form.
+      form.q.dispatchEvent(new KeyboardEvent('keypress',
+          {key: 'Enter', shiftKey: true, bubbles: true}));
+
+      sinon.assert.calledOnce(window.open);
+      sinon.assert.calledWith(window.open,
+          '/p/chromium/issues/list?q=test&can=1', '_blank', 'noopener');
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.js b/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.js
new file mode 100644
index 0000000..13f8267
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.js
@@ -0,0 +1,62 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/** @const {string} CSV download link's data href prefix, RFC 4810 Section 3 */
+export const CSV_DATA_HREF_PREFIX = 'data:text/csv;charset=utf-8,';
+
+/**
+ * Format array into plaintext csv
+ * @param {Array<Array>} data
+ * @return {string}
+ */
+export const convertListContentToCsv = (data) => {
+  const result = data.reduce((acc, row) => {
+    return `${acc}\r\n${row.map(preventCSVInjectionAndStringify).join(',')}`;
+  }, '');
+  // Remove leading /r and /n
+  return result.slice(2);
+};
+
+/**
+ * Prevent CSV injection, escape double quotes, and wrap with double quotes
+ * See owasp.org/index.php/CSV_Injection
+ * @param {string} cell
+ * @return {string}
+ */
+export const preventCSVInjectionAndStringify = (cell) => {
+  // Prepend all double quotes with another double quote, RFC 4810 Section 2.7
+  let escaped = cell.replace(/"/g, '""');
+
+  // prevent CSV injection: owasp.org/index.php/CSV_Injection
+  if (cell[0] === '=' ||
+      cell[0] === '+' ||
+      cell[0] === '-' ||
+      cell[0] === '@') {
+    escaped = `'${escaped}`;
+  }
+
+  // Wrap cell with double quotes, RFC 4810 Section 2.7
+  return `"${escaped}"`;
+};
+
+/**
+ * Prepare data for csv download by converting array of array into csv string
+ * @param {Array<Array<string>>} data
+ * @param {Array<string>=} headers Column headers
+ * @return {string} CSV formatted string
+ */
+export const prepareDataForDownload = (data, headers = []) => {
+  const mainContent = [headers, ...data];
+
+  return `${convertListContentToCsv(mainContent)}`;
+};
+
+/**
+ * Constructs download link url from csv string data.
+ * @param {string} data CSV data
+ * @return {string}
+ */
+export const constructHref = (data = '') => {
+  return `${CSV_DATA_HREF_PREFIX}${encodeURIComponent(data)}`;
+};
diff --git a/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.test.js b/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.test.js
new file mode 100644
index 0000000..cd124a5
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-list/list-to-csv-helpers.test.js
@@ -0,0 +1,145 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {
+  constructHref,
+  convertListContentToCsv,
+  prepareDataForDownload,
+  preventCSVInjectionAndStringify,
+} from './list-to-csv-helpers.js';
+
+describe('constructHref', () => {
+  it('has default of empty string', () => {
+    const result = constructHref();
+    assert.equal(result, 'data:text/csv;charset=utf-8,');
+  });
+
+  it('starts with data:', () => {
+    const result = constructHref('');
+    assert.isTrue(result.startsWith('data:'));
+  });
+
+  it('uses charset=utf-8', () => {
+    const result = constructHref('');
+    assert.isTrue(result.search('charset=utf-8') > -1);
+  });
+
+  it('encodes URI component', () => {
+    const encodeFuncStub = sinon.stub(window, 'encodeURIComponent');
+    constructHref('');
+    sinon.assert.calledOnce(encodeFuncStub);
+
+    window.encodeURIComponent.restore();
+  });
+
+  it('encodes URI component', () => {
+    const input = 'foo, bar fizz=buzz';
+    const expected = 'foo%2C%20bar%20fizz%3Dbuzz';
+    const output = constructHref(input);
+
+    assert.equal(expected, output.split(',')[1]);
+  });
+});
+
+describe('convertListContentToCsv', () => {
+  it('joins rows with carriage return and line feed, CRLF', () => {
+    const input = [['foobar'], ['fizzbuzz']];
+    const expected = '"foobar"\r\n"fizzbuzz"';
+    assert.equal(expected, convertListContentToCsv(input));
+  });
+
+  it('joins columns with commas', () => {
+    const input = [['foo', 'bar', 'fizz', 'buzz']];
+    const expected = '"foo","bar","fizz","buzz"';
+    assert.equal(expected, convertListContentToCsv(input));
+  });
+
+  it('starts with non-empty row', () => {
+    const input = [['foobar']];
+    const expected = '"foobar"';
+    const result = convertListContentToCsv(input);
+    assert.equal(expected, result);
+    assert.isFalse(result.startsWith('\r\n'));
+  });
+});
+
+describe('prepareDataForDownload', () => {
+  it('prepends header row', () => {
+    const headers = ['column1', 'column2'];
+    const result = prepareDataForDownload([['a', 'b']], headers);
+
+    const expected = `"column1","column2"`;
+    assert.equal(expected, result.split('\r\n')[0]);
+    assert.isTrue(result.startsWith(expected));
+  });
+});
+
+describe('preventCSVInjectionAndStringify', () => {
+  it('prepends all double quotes with another double quote', () => {
+    let input = '"hello world"';
+    let expect = '""hello world""';
+    assert.equal(expect, preventCSVInjectionAndStringify(input).slice(1, -1));
+
+    input = 'Just a double quote: " ';
+    expect = 'Just a double quote: "" ';
+    assert.equal(expect, preventCSVInjectionAndStringify(input).slice(1, -1));
+
+    input = 'Multiple"double"quotes"""';
+    expect = 'Multiple""double""quotes""""""';
+    assert.equal(expect, preventCSVInjectionAndStringify(input).slice(1, -1));
+  });
+
+  it('wraps string with double quotes', () => {
+    let input = '"hello world"';
+    let expected = preventCSVInjectionAndStringify(input);
+    assert.equal('"', expected[0]);
+    assert.equal('"', expected[expected.length-1]);
+
+    input = 'For unevent quotes too: " ';
+    expected = '"For unevent quotes too: "" "';
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+
+    input = 'And for ending quotes"""';
+    expected = '"And for ending quotes"""""""';
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+  });
+
+  it('wraps strings containing commas with double quotes', () => {
+    const input = 'Let\'s, add, a bunch, of, commas,';
+    const expected = '"Let\'s, add, a bunch, of, commas,"';
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+  });
+
+  it('can handle strings containing commas and new line chars', () => {
+    const input = `""new"",\r\nline  "" "",\r\nand 'end', and end`;
+    const expected = `"""""new"""",\r\nline  """" """",\r\nand 'end', and end"`;
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+  });
+
+  it('preserves single quotes', () => {
+    let input = `all the 'single' quotes`;
+    let expected = `"all the 'single' quotes"`;
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+
+    input = `''''' fives single quotes before and after '''''`;
+    expected = `"''''' fives single quotes before and after '''''"`;
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+  });
+
+  it('prevents csv injection', () => {
+    let input = `@@Should prepend with single quote`;
+    let expected = `"'@@Should prepend with single quote"`;
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+
+    input = `at symbol @ later on, do not expect ' at start`;
+    expected = `"at symbol @ later on, do not expect ' at start"`;
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+
+    input = `==@+=--@Should prepend with single quote`;
+    expected = `"'==@+=--@Should prepend with single quote"`;
+    assert.equal(expected, preventCSVInjectionAndStringify(input));
+  });
+});
diff --git a/static_src/elements/framework/mr-issue-list/mr-issue-list.js b/static_src/elements/framework/mr-issue-list/mr-issue-list.js
new file mode 100644
index 0000000..3e0a279
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-list/mr-issue-list.js
@@ -0,0 +1,1575 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import page from 'page';
+import {connectStore, store} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import 'elements/framework/links/mr-issue-link/mr-issue-link.js';
+import 'elements/framework/links/mr-crbug-link/mr-crbug-link.js';
+import 'elements/framework/mr-dropdown/mr-dropdown.js';
+import 'elements/framework/mr-star/mr-issue-star.js';
+import {constructHref, prepareDataForDownload} from './list-to-csv-helpers.js';
+import {
+  issueRefToUrl,
+  issueRefToString,
+  issueStringToRef,
+  issueToIssueRef,
+  issueToIssueRefString,
+  labelRefsToOneWordLabels,
+} from 'shared/convertersV0.js';
+import {isTextInput, findDeepEventTarget} from 'shared/dom-helpers.js';
+import {
+  urlWithNewParams,
+  pluralize,
+  setHasAny,
+  objectValuesForKeys,
+} from 'shared/helpers.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {parseColSpec, EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import './mr-show-columns-dropdown.js';
+
+/**
+ * Column to display name mapping dictionary
+ * @type {Object<string, string>}
+ */
+const COLUMN_DISPLAY_NAMES = Object.freeze({
+  'summary': 'Summary + Labels',
+});
+
+/** @const {number} Button property value of DOM click event */
+const PRIMARY_BUTTON = 0;
+/** @const {number} Button property value of DOM auxclick event */
+const MIDDLE_BUTTON = 1;
+
+/** @const {string} A short transition to ease movement of list items. */
+const EASE_OUT_TRANSITION = 'transform 0.05s cubic-bezier(0, 0, 0.2, 1)';
+
+/**
+ * Really high cardinality attributes like ID and Summary are unlikely to be
+ * useful if grouped, so it's better to just hide the option.
+ * @const {Set<string>}
+ */
+const UNGROUPABLE_COLUMNS = new Set(['id', 'summary']);
+
+/**
+ * Columns that should render as issue links.
+ * @const {Set<string>}
+ */
+const ISSUE_COLUMNS = new Set(['id', 'mergedinto', 'blockedon', 'blocking']);
+
+/**
+ * `<mr-issue-list>`
+ *
+ * A list of issues intended to be used in multiple contexts.
+ * @extends {LitElement}
+ */
+export class MrIssueList extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          width: 100%;
+          font-size: var(--chops-main-font-size);
+        }
+        table {
+          width: 100%;
+        }
+        .edit-widget-container {
+          display: flex;
+          flex-wrap: no-wrap;
+          align-items: center;
+        }
+        mr-issue-star {
+          --mr-star-size: 18px;
+          margin-bottom: 1px;
+          margin-left: 4px;
+        }
+        input[type="checkbox"] {
+          cursor: pointer;
+          margin: 0 4px;
+          width: 16px;
+          height: 16px;
+          border-radius: 2px;
+          box-sizing: border-box;
+          appearance: none;
+          -webkit-appearance: none;
+          border: 2px solid var(--chops-gray-400);
+          position: relative;
+          background: var(--chops-white);
+        }
+        th input[type="checkbox"] {
+          border-color: var(--chops-gray-500);
+        }
+        input[type="checkbox"]:checked {
+          background: var(--chops-primary-accent-color);
+          border-color: var(--chops-primary-accent-color);
+        }
+        input[type="checkbox"]:checked::after {
+          left: 1px;
+          top: 2px;
+          position: absolute;
+          content: "";
+          width: 8px;
+          height: 4px;
+          border: 2px solid white;
+          border-right: none;
+          border-top: none;
+          transform: rotate(-45deg);
+        }
+        td, th.group-header {
+          padding: 4px 8px;
+          text-overflow: ellipsis;
+          border-bottom: var(--chops-normal-border);
+          cursor: pointer;
+          font-weight: normal;
+        }
+        .group-header-content {
+          height: 100%;
+          width: 100%;
+          align-items: center;
+          display: flex;
+        }
+        th.group-header i.material-icons {
+          font-size: var(--chops-icon-font-size);
+          color: var(--chops-primary-icon-color);
+          margin-right: 4px;
+        }
+        td.ignore-navigation {
+          cursor: default;
+        }
+        th {
+          background: var(--chops-table-header-bg);
+          white-space: nowrap;
+          text-align: left;
+          border-bottom: var(--chops-normal-border);
+        }
+        th.selection-header {
+          padding: 3px 8px;
+        }
+        th > mr-dropdown, th > mr-show-columns-dropdown {
+          font-weight: normal;
+          color: var(--chops-link-color);
+          --mr-dropdown-icon-color: var(--chops-link-color);
+          --mr-dropdown-anchor-padding: 3px 8px;
+          --mr-dropdown-anchor-font-weight: bold;
+          --mr-dropdown-menu-min-width: 150px;
+        }
+        tr {
+          padding: 0 8px;
+        }
+        tr[selected] {
+          background: var(--chops-selected-bg);
+        }
+        td:first-child, th:first-child {
+          border-left: 4px solid transparent;
+        }
+        tr[cursored] > td:first-child {
+          border-left: 4px solid var(--chops-blue-700);
+        }
+        mr-crbug-link {
+          /* We need the shortlink to be hidden but still accessible.
+          * The opacity attribute visually hides a link while still
+          * keeping it in the DOM.opacity. */
+          --mr-crbug-link-opacity: 0;
+          --mr-crbug-link-opacity-focused: 1;
+        }
+        td:hover > mr-crbug-link {
+          --mr-crbug-link-opacity: 1;
+        }
+        .col-summary, .header-summary {
+          /* Setting a table cell to 100% width makes it take up
+          * all remaining space in the table, not the full width of
+          * the table. */
+          width: 100%;
+        }
+        .summary-label {
+          display: inline-block;
+          margin: 0 2px;
+          color: var(--chops-green-800);
+          text-decoration: none;
+          font-size: 90%;
+        }
+        .summary-label:hover {
+          text-decoration: underline;
+        }
+        td.draggable i {
+          opacity: 0;
+        }
+        td.draggable {
+          color: var(--chops-primary-icon-color);
+          cursor: grab;
+          padding-left: 0;
+          padding-right: 0;
+        }
+        tr.dragged {
+          opacity: 0.74;
+        }
+        tr:hover td.draggable i {
+          opacity: 1;
+        }
+        .csv-download-container {
+          border-bottom: none;
+          text-align: end;
+          cursor: default;
+        }
+        #hidden-data-link {
+          display: none;
+        }
+        @media (min-width: 1024px) {
+          .first-row th {
+            position: sticky;
+            top: var(--monorail-header-height);
+            z-index: 10;
+          }
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    const selectAllChecked = this._selectedIssues.size > 0;
+    const checkboxLabel = `Select ${selectAllChecked ? 'None' : 'All'}`;
+
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <table cellspacing="0">
+        <thead>
+          <tr class="first-row">
+            ${this.rerank ? html`<th></th>` : ''}
+            <th class="selection-header">
+              <div class="edit-widget-container">
+                ${this.selectionEnabled ? html`
+                  <input
+                    class="select-all"
+                    .checked=${selectAllChecked}
+                    type="checkbox"
+                    aria-label=${checkboxLabel}
+                    title=${checkboxLabel}
+                    @change=${this._selectAll}
+                  />
+                ` : ''}
+              </div>
+            </th>
+            ${this.columns.map((column, i) => this._renderHeader(column, i))}
+            <th style="z-index: ${this.highestZIndex};">
+              <mr-show-columns-dropdown
+                title="Show columns"
+                menuAlignment="right"
+                .columns=${this.columns}
+                .issues=${this.issues}
+                .defaultFields=${this.defaultFields}
+              ></mr-show-columns-dropdown>
+            </th>
+          </tr>
+        </thead>
+        <tbody>
+          ${this._renderIssues()}
+        </tbody>
+        ${this.userDisplayName && html`
+          <tfoot><tr><td colspan=999 class="csv-download-container">
+            <a id="download-link" aria-label="Download page as CSV"
+                @click=${this._downloadCsv} href>CSV</a>
+            <a id="hidden-data-link" download="${this.projectName}-issues.csv"
+              href=${this._csvDataHref}></a>
+          </td></tr></tfoot>
+        `}
+      </table>
+    `;
+  }
+
+  /**
+   * @param {string} column
+   * @param {number} i The index of the column in the table.
+   * @return {TemplateResult} html for header for the i-th column.
+   * @private
+   */
+  _renderHeader(column, i) {
+    // zIndex is used to render the z-index property in descending order
+    const zIndex = this.highestZIndex - i;
+    const colKey = column.toLowerCase();
+    const name = colKey in COLUMN_DISPLAY_NAMES ? COLUMN_DISPLAY_NAMES[colKey] :
+      column;
+    return html`
+      <th style="z-index: ${zIndex};" class="header-${colKey}">
+        <mr-dropdown
+          class="dropdown-${colKey}"
+          .text=${name}
+          .items=${this._headerActions(column, i)}
+          menuAlignment="left"
+        ></mr-dropdown>
+      </th>`;
+  }
+
+  /**
+   * @param {string} column
+   * @param {number} i The index of the column in the table.
+   * @return {Array<Object>} Available actions for the column.
+   * @private
+   */
+  _headerActions(column, i) {
+    const columnKey = column.toLowerCase();
+
+    const isGroupable = this.sortingAndGroupingEnabled &&
+        !UNGROUPABLE_COLUMNS.has(columnKey);
+
+    let showOnly = [];
+    if (isGroupable) {
+      const values = [...this._uniqueValuesByColumn.get(columnKey)];
+      if (values.length) {
+        showOnly = [{
+          text: 'Show only',
+          items: values.map((v) => ({
+            text: v,
+            handler: () => this.showOnly(column, v),
+          })),
+        }];
+      }
+    }
+    const sortingActions = this.sortingAndGroupingEnabled ? [
+      {
+        text: 'Sort up',
+        handler: () => this.updateSortSpec(column),
+      },
+      {
+        text: 'Sort down',
+        handler: () => this.updateSortSpec(column, true),
+      },
+    ] : [];
+    const actions = [
+      ...sortingActions,
+      ...showOnly,
+      {
+        text: 'Hide column',
+        handler: () => this.removeColumn(i),
+      },
+    ];
+    if (isGroupable) {
+      actions.push({
+        text: 'Group rows',
+        handler: () => this.addGroupBy(i),
+      });
+    }
+    return actions;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderIssues() {
+    // Keep track of all the groups that we've seen so far to create
+    // group headers as needed.
+    const {issues, groupedIssues} = this;
+
+    if (groupedIssues) {
+      // Make sure issues in groups are rendered with unique indices across
+      // groups to make sure hot keys and the like still work.
+      let indexOffset = 0;
+      return html`${groupedIssues.map(({groupName, issues}) => {
+        const template = html`
+          ${this._renderGroup(groupName, issues, indexOffset)}
+        `;
+        indexOffset += issues.length;
+        return template;
+      })}`;
+    }
+
+    return html`
+      ${issues.map((issue, i) => this._renderRow(issue, i))}
+    `;
+  }
+
+  /**
+   * @param {string} groupName
+   * @param {Array<Issue>} issues
+   * @param {number} iOffset
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderGroup(groupName, issues, iOffset) {
+    if (!this.groups.length) return html``;
+
+    const count = issues.length;
+    const groupKey = groupName.toLowerCase();
+    const isHidden = this._hiddenGroups.has(groupKey);
+
+    return html`
+      <tr>
+        <th
+          class="group-header"
+          colspan="${this.numColumns}"
+          @click=${() => this._toggleGroup(groupKey)}
+          aria-expanded=${(!isHidden).toString()}
+        >
+          <div class="group-header-content">
+            <i
+              class="material-icons"
+              title=${isHidden ? 'Show' : 'Hide'}
+            >${isHidden ? 'add' : 'remove'}</i>
+            ${count} ${pluralize(count, 'issue')}: ${groupName}
+          </div>
+        </th>
+      </tr>
+      ${issues.map((issue, i) => this._renderRow(issue, iOffset + i, isHidden))}
+    `;
+  }
+
+  /**
+   * @param {string} groupKey Lowercase group key.
+   * @private
+   */
+  _toggleGroup(groupKey) {
+    if (this._hiddenGroups.has(groupKey)) {
+      this._hiddenGroups.delete(groupKey);
+    } else {
+      this._hiddenGroups.add(groupKey);
+    }
+
+    // Lit-element's default hasChanged check does not notice when Sets mutate.
+    this.requestUpdate('_hiddenGroups');
+  }
+
+  /**
+   * @param {Issue} issue
+   * @param {number} i Index within the list of issues
+   * @param {boolean=} isHidden
+   * @return {TemplateResult}
+   */
+  _renderRow(issue, i, isHidden = false) {
+    const rowSelected = this._selectedIssues.has(issueRefToString(issue));
+    const id = issueRefToString(issue);
+    const cursorId = issueRefToString(this.cursor);
+    const hasCursor = cursorId === id;
+    const dragged = this._dragging && rowSelected;
+
+    return html`
+      <tr
+        class="row-${i} list-row ${dragged ? 'dragged' : ''}"
+        ?selected=${rowSelected}
+        ?cursored=${hasCursor}
+        ?hidden=${isHidden}
+        data-issue-ref=${id}
+        data-index=${i}
+        data-name=${issue.name}
+        @focus=${this._setRowAsCursorOnFocus}
+        @click=${this._clickIssueRow}
+        @auxclick=${this._clickIssueRow}
+        @keydown=${this._keydownIssueRow}
+        tabindex="0"
+      >
+        ${this.rerank ? html`
+          <td class="draggable ignore-navigation"
+              @mousedown=${this._onMouseDown}>
+            <i class="material-icons" title="Drag issue">drag_indicator</i>
+          </td>
+        ` : ''}
+        <td class="ignore-navigation">
+          <div class="edit-widget-container">
+            ${this.selectionEnabled ? html`
+              <input
+                class="issue-checkbox"
+                .value=${id}
+                .checked=${rowSelected}
+                type="checkbox"
+                data-index=${i}
+                aria-label="Select Issue ${issue.localId}"
+                @change=${this._selectIssue}
+                @click=${this._selectIssueRange}
+              />
+            ` : ''}
+            ${this.starringEnabled ? html`
+              <mr-issue-star
+                .issueRef=${issueToIssueRef(issue)}
+              ></mr-issue-star>
+            ` : ''}
+          </div>
+        </td>
+
+        ${this.columns.map((column) => html`
+          <td class="col-${column.toLowerCase()}">
+            ${this._renderCell(column, issue)}
+          </td>
+        `)}
+
+        <td>
+          <mr-crbug-link .issue=${issue}></mr-crbug-link>
+        </td>
+      </tr>
+    `;
+  }
+
+  /**
+   * @param {string} column
+   * @param {Issue} issue
+   * @return {TemplateResult} Html for the given column for the given issue.
+   * @private
+   */
+  _renderCell(column, issue) {
+    const columnName = column.toLowerCase();
+    if (columnName === 'summary') {
+      return html`
+        ${issue.summary}
+        ${labelRefsToOneWordLabels(issue.labelRefs).map(({label}) => html`
+          <a
+            class="summary-label"
+            href="/p/${issue.projectName}/issues/list?q=label%3A${label}"
+          >${label}</a>
+        `)}
+      `;
+    }
+    const values = this.extractFieldValues(issue, column);
+
+    if (!values.length) return EMPTY_FIELD_VALUE;
+
+    // TODO(zhangtiff): Make this based on the "ISSUE" field type rather than a
+    // hardcoded list of issue fields.
+    if (ISSUE_COLUMNS.has(columnName)) {
+      return values.map((issueRefString, i) => {
+        const issue = this._issueForRefString(issueRefString, this.projectName);
+        return html`
+          <mr-issue-link
+            .projectName=${this.projectName}
+            .issue=${issue}
+            .queryParams=${this._queryParams}
+            short
+          ></mr-issue-link>${values.length - 1 > i ? ', ' : ''}
+        `;
+      });
+    }
+    return values.join(', ');
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Array of columns to display.
+       */
+      columns: {type: Array},
+      /**
+       * Array of built in fields that are available outside of project
+       * configuration.
+       */
+      defaultFields: {type: Array},
+      /**
+       * A function that takes in an issue and a field name and returns the
+       * value for that field in the issue. This function accepts custom fields,
+       * built in fields, and ad hoc fields computed from label prefixes.
+       */
+      extractFieldValues: {type: Object},
+      /**
+       * Array of columns that are used as groups for issues.
+       */
+      groups: {type: Array},
+      /**
+       * List of issues to display.
+       */
+      issues: {type: Array},
+      /**
+       * A Redux action creator that calls the API to rerank the issues
+       * in the list. If set, reranking is enabled for this issue list.
+       */
+      rerank: {type: Object},
+      /**
+       * Whether issues should be selectable or not.
+       */
+      selectionEnabled: {type: Boolean},
+      /**
+       * Whether issues should be sortable and groupable or not. This will
+       * change how column headers will be displayed. The ability to sort and
+       * group are currently coupled.
+       */
+      sortingAndGroupingEnabled: {type: Boolean},
+      /**
+       * Whether to show issue starring or not.
+       */
+      starringEnabled: {type: Boolean},
+      /**
+       * A query representing the current set of matching issues in the issue
+       * list. Does not necessarily match queryParams.q since queryParams.q can
+       * be empty while currentQuery is set to a default project query.
+       */
+      currentQuery: {type: String},
+      /**
+       * Object containing URL parameters to be preserved when issue links are
+       * clicked. This Object is only used for the purpose of preserving query
+       * parameters across links, not for the purpose of evaluating the query
+       * parameters themselves to get values like columns, sort, or q. This
+       * separation is important because we don't want to tightly couple this
+       * list component with a specific URL system.
+       * @private
+       */
+      _queryParams: {type: Object},
+      /**
+       * The initial cursor that a list view uses. This attribute allows users
+       * of the list component to specify and control the cursor. When the
+       * initialCursor attribute updates, the list focuses the element specified
+       * by the cursor.
+       */
+      initialCursor: {type: String},
+      /**
+       * Logged in user's display name
+       */
+      userDisplayName: {type: String},
+      /**
+       * IssueRef Object specifying which issue the user is currently focusing.
+       */
+      _localCursor: {type: Object},
+      /**
+       * Set of group keys that are currently hidden.
+       */
+      _hiddenGroups: {type: Object},
+      /**
+       * Set of all selected issues where each entry is an issue ref string.
+       */
+      _selectedIssues: {type: Object},
+      /**
+       * List of unique phase names for all phases in issues.
+       */
+      _phaseNames: {type: Array},
+      /**
+       * True iff the user is dragging issues.
+       */
+      _dragging: {type: Boolean},
+      /**
+       * CSV data in data HREF format, used to download csv
+       */
+      _csvDataHref: {type: String},
+      /**
+       * Function to get a full Issue object for a given ref string.
+       */
+      _issueForRefString: {type: Object},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+    /** @type {Array<Issue>} */
+    this.issues = [];
+    // TODO(jojwang): monorail:6336#c8, when ezt listissues page is fully
+    // deprecated, remove phaseNames from mr-issue-list.
+    this._phaseNames = [];
+    /** @type {IssueRef} */
+    this._localCursor;
+    /** @type {IssueRefString} */
+    this.initialCursor;
+    /** @type {Set<IssueRefString>} */
+    this._selectedIssues = new Set();
+    /** @type {string} */
+    this.projectName;
+    /** @type {Object} */
+    this._queryParams = {};
+    /** @type {string} */
+    this.currentQuery = '';
+    /**
+     * @param {Array<String>} items
+     * @param {number} index
+     * @return {Promise<void>}
+     */
+    this.rerank = null;
+    /** @type {boolean} */
+    this.selectionEnabled = false;
+    /** @type {boolean} */
+    this.sortingAndGroupingEnabled = false;
+    /** @type {boolean} */
+    this.starringEnabled = false;
+    /** @type {Array} */
+    this.columns = ['ID', 'Summary'];
+    /** @type {Array<string>} */
+    this.defaultFields = [];
+    /** @type {Array} */
+    this.groups = [];
+    this.userDisplayName = '';
+
+    /** @type {function(KeyboardEvent): void} */
+    this._boundRunListHotKeys = this._runListHotKeys.bind(this);
+    /** @type {function(MouseEvent): void} */
+    this._boundOnMouseMove = this._onMouseMove.bind(this);
+    /** @type {function(MouseEvent): void} */
+    this._boundOnMouseUp = this._onMouseUp.bind(this);
+
+    /**
+     * @param {Issue} _issue
+     * @param {string} _fieldName
+     * @return {Array<string>}
+     */
+    this.extractFieldValues = (_issue, _fieldName) => [];
+
+    /**
+     * @param {IssueRefString} _issueRefString
+     * @param {string} projectName The currently viewed project.
+     * @return {Issue}
+     */
+    this._issueForRefString = (_issueRefString, projectName) =>
+      issueStringToRef(_issueRefString, projectName);
+
+    this._hiddenGroups = new Set();
+
+    this._starredIssues = new Set();
+    this._fetchingStarredIssues = false;
+    this._starringIssues = new Map();
+
+    this._uniqueValuesByColumn = new Map();
+
+    this._dragging = false;
+    this._mouseX = null;
+    this._mouseY = null;
+
+    /** @type {number} */
+    this._lastSelectedCheckbox = -1;
+
+    // Expose page.js for stubbing.
+    this._page = page;
+    /** @type {string} page data in csv format as data href */
+    this._csvDataHref = '';
+  };
+
+  /** @override */
+  stateChanged(state) {
+    this._starredIssues = issueV0.starredIssues(state);
+    this._fetchingStarredIssues =
+        issueV0.requests(state).fetchStarredIssues.requesting;
+    this._starringIssues = issueV0.starringIssues(state);
+
+    this._phaseNames = (issueV0.issueListPhaseNames(state) || []);
+    this._queryParams = sitewide.queryParams(state);
+
+    this._issueForRefString = issueV0.issueForRefString(state);
+  }
+
+  /** @override */
+  firstUpdated() {
+    // Only attach an event listener once the DOM has rendered.
+    window.addEventListener('keydown', this._boundRunListHotKeys);
+    this._dataLink = this.shadowRoot.querySelector('#hidden-data-link');
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    window.removeEventListener('keydown', this._boundRunListHotKeys);
+  }
+
+  /**
+   * @override
+   * @fires CustomEvent#selectionChange
+   */
+  update(changedProperties) {
+    if (changedProperties.has('issues')) {
+      // Clear selected issues to avoid an ever-growing Set size. In the future,
+      // we may want to consider saving selections across issue reloads, though,
+      // such as in the case or list refreshing.
+      this._selectedIssues = new Set();
+      this.dispatchEvent(new CustomEvent('selectionChange'));
+
+      // Clear group toggle state when the list of issues changes to prevent an
+      // ever-growing Set size.
+      this._hiddenGroups = new Set();
+
+      this._lastSelectedCheckbox = -1;
+    }
+
+    const valuesByColumnArgs = ['issues', 'columns', 'extractFieldValues'];
+    if (setHasAny(changedProperties, valuesByColumnArgs)) {
+      this._uniqueValuesByColumn = this._computeUniqueValuesByColumn(
+          ...objectValuesForKeys(this, valuesByColumnArgs));
+    }
+
+    super.update(changedProperties);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('initialCursor')) {
+      const ref = issueStringToRef(this.initialCursor, this.projectName);
+      const row = this._getRowFromIssueRef(ref);
+      if (row) {
+        row.focus();
+      }
+    }
+  }
+
+  /**
+   * Iterates through all issues in a list to sort unique values
+   * across columns, for use in the "Show only" feature.
+   * @param {Array} issues
+   * @param {Array} columns
+   * @param {function(Issue, string): Array<string>} fieldExtractor
+   * @return {Map} Map where each entry has a String key for the
+   *   lowercase column name and a Set value, continuing all values for
+   *   that column.
+   */
+  _computeUniqueValuesByColumn(issues, columns, fieldExtractor) {
+    const valueMap = new Map(
+        columns.map((col) => [col.toLowerCase(), new Set()]));
+
+    issues.forEach((issue) => {
+      columns.forEach((col) => {
+        const key = col.toLowerCase();
+        const valueSet = valueMap.get(key);
+
+        const values = fieldExtractor(issue, col);
+        // Note: This allows multiple casings of the same values to be added
+        // to the Set.
+        values.forEach((v) => valueSet.add(v));
+      });
+    });
+    return valueMap;
+  }
+
+  /**
+   * Used for dynamically computing z-index to ensure column dropdowns overlap
+   * properly.
+   */
+  get highestZIndex() {
+    return this.columns.length + 10;
+  }
+
+  /**
+   * The number of columns displayed in the table. This is the count of
+   * customized columns + number of built in columns.
+   */
+  get numColumns() {
+    return this.columns.length + 2;
+  }
+
+  /**
+   * Sort issues into groups if groups are defined. The grouping feature is used
+   * when the "groupby" URL parameter is set in the list view.
+   */
+  get groupedIssues() {
+    if (!this.groups || !this.groups.length) return;
+
+    const issuesByGroup = new Map();
+
+    this.issues.forEach((issue) => {
+      const groupName = this._groupNameForIssue(issue);
+      const groupKey = groupName.toLowerCase();
+
+      if (!issuesByGroup.has(groupKey)) {
+        issuesByGroup.set(groupKey, {groupName, issues: [issue]});
+      } else {
+        const entry = issuesByGroup.get(groupKey);
+        entry.issues.push(issue);
+      }
+    });
+    return [...issuesByGroup.values()];
+  }
+
+  /**
+   * The currently selected issue, with _localCursor overriding initialCursor.
+   *
+   * @return {IssueRef} The currently selected issue.
+   */
+  get cursor() {
+    if (this._localCursor) {
+      return this._localCursor;
+    }
+    if (this.initialCursor) {
+      return issueStringToRef(this.initialCursor, this.projectName);
+    }
+    return {};
+  }
+
+  /**
+   * Computes the name of the group that an issue belongs to. Issues are grouped
+   * by fields that the user specifies and group names are generated using a
+   * combination of an issue's field values for all specified groups.
+   *
+   * @param {Issue} issue
+   * @return {string}
+   */
+  _groupNameForIssue(issue) {
+    const groups = this.groups;
+    const keyPieces = [];
+
+    groups.forEach((group) => {
+      const values = this.extractFieldValues(issue, group);
+      if (!values.length) {
+        keyPieces.push(`-has:${group}`);
+      } else {
+        values.forEach((v) => {
+          keyPieces.push(`${group}=${v}`);
+        });
+      }
+    });
+
+    return keyPieces.join(' ');
+  }
+
+  /**
+   * @return {Array<Issue>} Selected issues in the order they appear.
+   */
+  get selectedIssues() {
+    return this.issues.filter((issue) =>
+      this._selectedIssues.has(issueToIssueRefString(issue)));
+  }
+
+  /**
+   * Update the search query to filter values matching a specific one.
+   *
+   * @param {string} column name of the column being filtered.
+   * @param {string} value value of the field to filter by.
+   */
+  showOnly(column, value) {
+    column = column.toLowerCase();
+
+    // TODO(zhangtiff): Handle edge cases where column names are not
+    // mapped directly to field names. For example, "AllLabels", should
+    // query for "Labels".
+    const querySegment = `${column}=${value}`;
+
+    let query = this.currentQuery.trim();
+
+    if (!query.includes(querySegment)) {
+      query += ' ' + querySegment;
+
+      this._updateQueryParams({q: query.trim()}, ['start']);
+    }
+  }
+
+  /**
+   * Update sort parameter in the URL based on user input.
+   *
+   * @param {string} column name of the column to be sorted.
+   * @param {boolean} descending descending or ascending order.
+   */
+  updateSortSpec(column, descending = false) {
+    column = column.toLowerCase();
+    const oldSpec = this._queryParams.sort || '';
+    const columns = parseColSpec(oldSpec.toLowerCase());
+
+    // Remove any old instances of the same sort spec.
+    const newSpec = columns.filter(
+        (c) => c && c !== column && c !== `-${column}`);
+
+    newSpec.unshift(`${descending ? '-' : ''}${column}`);
+
+    this._updateQueryParams({sort: newSpec.join(' ')}, ['start']);
+  }
+
+  /**
+   * Updates the groupby URL parameter to include a new column to group.
+   *
+   * @param {number} i index of the column to be grouped.
+   */
+  addGroupBy(i) {
+    const groups = [...this.groups];
+    const columns = [...this.columns];
+    const groupedColumn = columns[i];
+    columns.splice(i, 1);
+
+    groups.unshift(groupedColumn);
+
+    this._updateQueryParams({
+      groupby: groups.join(' '),
+      colspec: columns.join('+'),
+    }, ['start']);
+  }
+
+  /**
+   * Removes the column at a particular index.
+   *
+   * @param {number} i the issue column to be removed.
+   */
+  removeColumn(i) {
+    const columns = [...this.columns];
+    columns.splice(i, 1);
+    this.reloadColspec(columns);
+  }
+
+  /**
+   * Adds a new column to a particular index.
+   *
+   * @param {string} name of the new column added.
+   */
+  addColumn(name) {
+    this.reloadColspec([...this.columns, name]);
+  }
+
+  /**
+   * Reflects changes to the columns of an issue list to the URL, through
+   * frontend routing.
+   *
+   * @param {Array} newColumns the new colspec to set in the URL.
+   */
+  reloadColspec(newColumns) {
+    this._updateQueryParams({colspec: newColumns.join('+')});
+  }
+
+  /**
+   * Navigates to the same URL as the current page, but with query
+   * params updated.
+   *
+   * @param {Object} newParams keys and values of the queryParams
+   * Object to be updated.
+   * @param {Array} deletedParams keys to be cleared from queryParams.
+   */
+  _updateQueryParams(newParams = {}, deletedParams = []) {
+    const url = urlWithNewParams(this._baseUrl(), this._queryParams, newParams,
+        deletedParams);
+    this._page(url);
+  }
+
+  /**
+   * Get the current URL of the page, without query params. Useful for
+   * test stubbing.
+   *
+   * @return {string} the URL of the list page, without params.
+   */
+  _baseUrl() {
+    return window.location.pathname;
+  }
+
+  /**
+   * Run issue list hot keys. This event handler needs to be bound globally
+   * because a list cursor can be defined even when no element in the list is
+   * focused.
+   * @param {KeyboardEvent} e
+   */
+  _runListHotKeys(e) {
+    if (!this.issues || !this.issues.length) return;
+    const target = findDeepEventTarget(e);
+    if (!target || isTextInput(target)) return;
+
+    const key = e.key;
+
+    const activeRow = this._getCursorElement();
+
+    let i = -1;
+    if (activeRow) {
+      i = Number.parseInt(activeRow.dataset.index);
+
+      const issue = this.issues[i];
+
+      switch (key) {
+        case 's': // Star focused issue.
+          this._starIssue(issueToIssueRef(issue));
+          return;
+        case 'x': // Toggle selection of focused issue.
+          const issueRefString = issueToIssueRefString(issue);
+          this._updateSelectedIssues([issueRefString],
+              !this._selectedIssues.has(issueRefString));
+          return;
+        case 'o': // Open current issue.
+        case 'O': // Open current issue in new tab.
+          this._navigateToIssue(issue, e.shiftKey);
+          return;
+      }
+    }
+
+    // Move up and down the issue list.
+    // 'j' moves 'down'.
+    // 'k' moves 'up'.
+    if (key === 'j' || key === 'k') {
+      if (key === 'j') { // Navigate down the list.
+        i += 1;
+        if (i >= this.issues.length) {
+          i = 0;
+        }
+      } else if (key === 'k') { // Navigate up the list.
+        i -= 1;
+        if (i < 0) {
+          i = this.issues.length - 1;
+        }
+      }
+
+      const nextRow = this.shadowRoot.querySelector(`.row-${i}`);
+      this._setRowAsCursor(nextRow);
+    }
+  }
+
+  /**
+   * @return {HTMLTableRowElement}
+   */
+  _getCursorElement() {
+    const cursor = this.cursor;
+    if (cursor) {
+      // If there's a cursor set, use that instead of focus.
+      return this._getRowFromIssueRef(cursor);
+    }
+    return;
+  }
+
+  /**
+   * @param {FocusEvent} e
+   */
+  _setRowAsCursorOnFocus(e) {
+    this._setRowAsCursor(/** @type {HTMLTableRowElement} */ (e.target));
+  }
+
+  /**
+   *
+   * @param {HTMLTableRowElement} row
+   */
+  _setRowAsCursor(row) {
+    this._localCursor = issueStringToRef(row.dataset.issueRef,
+        this.projectName);
+    row.focus();
+  }
+
+  /**
+   * @param {IssueRef} ref The issueRef to query for.
+   * @return {HTMLTableRowElement}
+   */
+  _getRowFromIssueRef(ref) {
+    return this.shadowRoot.querySelector(
+        `.list-row[data-issue-ref="${issueRefToString(ref)}"]`);
+  }
+
+  /**
+   * Returns an Array containing every <tr> in the list, excluding the header.
+   * @return {Array<HTMLTableRowElement>}
+   */
+  _getRows() {
+    return Array.from(this.shadowRoot.querySelectorAll('.list-row'));
+  }
+
+  /**
+   * Returns an Array containing every selected <tr> in the list.
+   * @return {Array<HTMLTableRowElement>}
+   */
+  _getSelectedRows() {
+    return this._getRows().filter((row) => {
+      return this._selectedIssues.has(row.dataset.issueRef);
+    });
+  }
+
+  /**
+   * @param {IssueRef} issueRef Issue to star
+   */
+  _starIssue(issueRef) {
+    if (!this.starringEnabled) return;
+    const issueKey = issueRefToString(issueRef);
+
+    // TODO(zhangtiff): Find way to share star disabling logic more.
+    const isStarring = this._starringIssues.has(issueKey) &&
+      this._starringIssues.get(issueKey).requesting;
+    const starEnabled = !this._fetchingStarredIssues && !isStarring;
+    if (starEnabled) {
+      const newIsStarred = !this._starredIssues.has(issueKey);
+      this._starIssueInternal(issueRef, newIsStarred);
+    }
+  }
+
+  /**
+   * Wrap store.dispatch and issue.star, for testing.
+   *
+   * @param {IssueRef} issueRef the issue being starred.
+   * @param {boolean} newIsStarred whether to star or unstar the issue.
+   * @private
+   */
+  _starIssueInternal(issueRef, newIsStarred) {
+    store.dispatch(issueV0.star(issueRef, newIsStarred));
+  }
+  /**
+   * @param {Event} e
+   * @fires CustomEvent#open-dialog
+   * @private
+   */
+  _selectAll(e) {
+    const checkbox = /** @type {HTMLInputElement} */ (e.target);
+
+    if (checkbox.checked) {
+      this._selectedIssues = new Set(this.issues.map(issueRefToString));
+    } else {
+      this._selectedIssues = new Set();
+    }
+    this.dispatchEvent(new CustomEvent('selectionChange'));
+  }
+
+  // TODO(zhangtiff): Implement Shift+Click to select a range of checkboxes
+  // for the 'x' hot key.
+  /**
+   * @param {MouseEvent} e
+   * @private
+   */
+  _selectIssueRange(e) {
+    if (!this.selectionEnabled) return;
+
+    const checkbox = /** @type {HTMLInputElement} */ (e.target);
+
+    const index = Number.parseInt(checkbox.dataset.index);
+    if (Number.isNaN(index)) {
+      console.error('Issue checkbox has invalid data-index attribute.');
+      return;
+    }
+
+    const lastIndex = this._lastSelectedCheckbox;
+    if (e.shiftKey && lastIndex >= 0) {
+      const newCheckedState = checkbox.checked;
+
+      const start = Math.min(lastIndex, index);
+      const end = Math.max(lastIndex, index) + 1;
+
+      const updatedIssueKeys = this.issues.slice(start, end).map(
+          issueToIssueRefString);
+      this._updateSelectedIssues(updatedIssueKeys, newCheckedState);
+    }
+
+    this._lastSelectedCheckbox = index;
+  }
+
+  /**
+   * @param {Event} e
+   * @private
+   */
+  _selectIssue(e) {
+    if (!this.selectionEnabled) return;
+
+    const checkbox = /** @type {HTMLInputElement} */ (e.target);
+    const issueKey = checkbox.value;
+
+    this._updateSelectedIssues([issueKey], checkbox.checked);
+  }
+
+  /**
+   * @param {Array<IssueRefString>} issueKeys Stringified issue refs.
+   * @param {boolean} selected
+   * @fires CustomEvent#selectionChange
+   * @private
+   */
+  _updateSelectedIssues(issueKeys, selected) {
+    let hasChanges = false;
+
+    issueKeys.forEach((issueKey) => {
+      const oldSelection = this._selectedIssues.has(issueKey);
+
+      if (selected) {
+        this._selectedIssues.add(issueKey);
+      } else if (this._selectedIssues.has(issueKey)) {
+        this._selectedIssues.delete(issueKey);
+      }
+
+      const newSelection = this._selectedIssues.has(issueKey);
+
+      hasChanges = hasChanges || newSelection !== oldSelection;
+    });
+
+
+    if (hasChanges) {
+      this.requestUpdate('_selectedIssues');
+      this.dispatchEvent(new CustomEvent('selectionChange'));
+    }
+  }
+
+  /**
+   * Handles 'Enter' being pressed when a row is focused.
+   * Note we install the 'Enter' listener on the row rather than the window so
+   * 'Enter' behaves as expected when the focus is on other elements.
+   *
+   * @param {KeyboardEvent} e
+   * @private
+   */
+  _keydownIssueRow(e) {
+    if (e.key === 'Enter') {
+      this._maybeOpenIssueRow(e);
+    }
+  }
+
+  /**
+   * Handles mouseDown to start drag events.
+   * @param {MouseEvent} event
+   * @private
+   */
+  _onMouseDown(event) {
+    event.cancelable && event.preventDefault();
+
+    this._mouseX = event.clientX;
+    this._mouseY = event.clientY;
+
+    this._setRowAsCursor(event.currentTarget.parentNode);
+    this._startDrag();
+
+    // We add the event listeners to window because the mouse can go out of the
+    // bounds of the target element. window.mouseUp still triggers even if the
+    // mouse is outside the browser window.
+    window.addEventListener('mousemove', this._boundOnMouseMove);
+    window.addEventListener('mouseup', this._boundOnMouseUp);
+  }
+
+  /**
+   * Handles mouseMove to continue drag events.
+   * @param {MouseEvent} event
+   * @private
+   */
+  _onMouseMove(event) {
+    event.cancelable && event.preventDefault();
+
+    const x = event.clientX - this._mouseX;
+    const y = event.clientY - this._mouseY;
+    this._continueDrag(x, y);
+  }
+
+  /**
+   * Handles mouseUp to end drag events.
+   * @param {MouseEvent} event
+   * @private
+   */
+  _onMouseUp(event) {
+    event.cancelable && event.preventDefault();
+
+    window.removeEventListener('mousemove', this._boundOnMouseMove);
+    window.removeEventListener('mouseup', this._boundOnMouseUp);
+
+    this._endDrag(event.clientY - this._mouseY);
+  }
+
+  /**
+   * Gives a visual indicator that we've started dragging an issue row.
+   * @private
+   */
+  _startDrag() {
+    this._dragging = true;
+
+    // If the dragged row is not selected, select it.
+    // TODO(dtu): Allow dragging an existing selection for multi-drag.
+    const issueRefString = issueRefToString(this.cursor);
+    this._selectedIssues = new Set();
+    this._updateSelectedIssues([issueRefString], true);
+  }
+
+  /**
+   * @param {number} x The x-distance the cursor has moved since mouseDown.
+   * @param {number} y The y-distance the cursor has moved since mouseDown.
+   * @private
+   */
+  _continueDrag(x, y) {
+    // Unselected rows: Transition them to their new positions.
+    const [rows, initialIndex, finalIndex] = this._computeRerank(y);
+    this._translateRows(rows, initialIndex, finalIndex);
+
+    // Selected rows: Stick them to the cursor. No transition.
+    for (const row of this._getSelectedRows()) {
+      row.style.transform = `translate(${x}px, ${y}px`;
+    };
+  }
+
+  /**
+   * @param {number} y The y-distance the cursor has moved since mouseDown.
+   * @private
+   */
+  async _endDrag(y) {
+    this._dragging = false;
+
+    // Unselected rows: Transition them to their new positions.
+    const [rows, initialIndex, finalIndex] = this._computeRerank(y);
+    const targetTranslation =
+        this._translateRows(rows, initialIndex, finalIndex);
+
+    // Selected rows: Transition them to their final positions
+    // and reset their opacity.
+    const selectedRows = this._getSelectedRows();
+    for (const row of selectedRows) {
+      row.style.transition = EASE_OUT_TRANSITION;
+      row.style.transform = `translate(0px, ${targetTranslation}px)`;
+    };
+
+    // Submit the change.
+    const items = selectedRows.map((row) => row.dataset.name);
+    await this.rerank(items, finalIndex);
+
+    // Reset the transforms.
+    for (const row of this._getRows()) {
+      row.style.transition = '';
+      row.style.transform = '';
+    };
+
+    // Set the cursor to the new row.
+    // In order to focus the correct element, we need the DOM to be in sync
+    // with the issue list. We modified this.issues, so wait for a re-render.
+    await this.updateComplete;
+    const selector = `.list-row[data-index="${finalIndex}"]`;
+    this.shadowRoot.querySelector(selector).focus();
+  }
+
+  /**
+   * Computes the starting and ending indices of the cursor row,
+   * given how far the mouse has been dragged in the y-direction.
+   * The indices assume the cursor row has been removed from the list.
+   * @param {number} y The y-distance the cursor has moved since mouseDown.
+   * @return {[Array<HTMLTableRowElement>, number, number]} A tuple containing:
+   *     An Array of table rows with the cursor row removed.
+   *     The initial index of the cursor row.
+   *     The final index of the cursor row.
+   * @private
+   */
+  _computeRerank(y) {
+    const row = this._getCursorElement();
+    const rows = this._getRows();
+    const listTop = row.parentNode.offsetTop;
+
+    // Find the initial index of the cursor row.
+    // TODO(dtu): If we support multi-drag, this should be the adjusted index of
+    // the first selected row after collapsing spaces in the selected group.
+    const initialIndex = rows.indexOf(row);
+    rows.splice(initialIndex, 1);
+
+    // Compute the initial and final y-positions of the top
+    // of the cursor row relative to the top of the list.
+    const initialY = row.offsetTop - listTop;
+    const finalY = initialY + y;
+
+    // Compute the final index of the cursor row.
+    // The break points are the halfway marks of each row.
+    let finalIndex = 0;
+    for (finalIndex = 0; finalIndex < rows.length; ++finalIndex) {
+      const rowTop = rows[finalIndex].offsetTop - listTop -
+          (finalIndex >= initialIndex ? row.scrollHeight : 0);
+      const breakpoint = rowTop + rows[finalIndex].scrollHeight / 2;
+      if (breakpoint > finalY) {
+        break;
+      }
+    }
+
+    return [rows, initialIndex, finalIndex];
+  }
+
+  /**
+   * @param {Array<HTMLTableRowElement>} rows Array of table rows with the
+   *    cursor row removed.
+   * @param {number} initialIndex The initial index of the cursor row.
+   * @param {number} finalIndex The final index of the cursor row.
+   * @return {number} The number of pixels the cursor row moved.
+   * @private
+   */
+  _translateRows(rows, initialIndex, finalIndex) {
+    const firstIndex = Math.min(initialIndex, finalIndex);
+    const lastIndex = Math.max(initialIndex, finalIndex);
+
+    const rowHeight = this._getCursorElement().scrollHeight;
+    const translation = initialIndex < finalIndex ? -rowHeight : rowHeight;
+
+    let targetTranslation = 0;
+    for (let i = 0; i < rows.length; ++i) {
+      rows[i].style.transition = EASE_OUT_TRANSITION;
+      if (i >= firstIndex && i < lastIndex) {
+        rows[i].style.transform = `translate(0px, ${translation}px)`;
+        targetTranslation += rows[i].scrollHeight;
+      } else {
+        rows[i].style.transform = '';
+      }
+    }
+
+    return initialIndex < finalIndex ? targetTranslation : -targetTranslation;
+  }
+
+  /**
+   * Handle click and auxclick on issue row.
+   * @param {MouseEvent} event
+   * @private
+   */
+  _clickIssueRow(event) {
+    if (event.button === PRIMARY_BUTTON || event.button === MIDDLE_BUTTON) {
+      this._maybeOpenIssueRow(
+          event, /* openNewTab= */ event.button === MIDDLE_BUTTON);
+    }
+  }
+
+  /**
+   * Checks that the given event should not be ignored, then navigates to the
+   * issue associated with the row.
+   *
+   * @param {MouseEvent|KeyboardEvent} rowEvent A click or 'enter' on a row.
+   * @param {boolean=} openNewTab Forces opening in a new tab
+   * @private
+   */
+  _maybeOpenIssueRow(rowEvent, openNewTab = false) {
+    const path = rowEvent.composedPath();
+    const containsIgnoredElement = path.find(
+        (node) => (node.tagName || '').toUpperCase() === 'A' ||
+        (node.classList && node.classList.contains('ignore-navigation')));
+    if (containsIgnoredElement) return;
+
+    const row = /** @type {HTMLTableRowElement} */ (rowEvent.currentTarget);
+
+    const i = Number.parseInt(row.dataset.index);
+
+    if (i >= 0 && i < this.issues.length) {
+      this._navigateToIssue(this.issues[i], openNewTab || rowEvent.metaKey ||
+          rowEvent.ctrlKey);
+    }
+  }
+
+  /**
+   * @param {Issue} issue
+   * @param {boolean} newTab
+   * @private
+   */
+  _navigateToIssue(issue, newTab) {
+    const link = issueRefToUrl(issueToIssueRef(issue),
+        this._queryParams);
+
+    if (newTab) {
+      // Whether the link opens in a new tab or window is based on the
+      // user's browser preferences.
+      window.open(link, '_blank', 'noopener');
+    } else {
+      this._page(link);
+    }
+  }
+
+  /**
+   * Convert an issue's data into an array of strings, where the columns
+   * match this.columns. Extracting data like _renderCell.
+   * @param {Issue} issue
+   * @return {Array<string>}
+   * @private
+   */
+  _convertIssueToPlaintextArray(issue) {
+    return this.columns.map((column) => {
+      return this.extractFieldValues(issue, column).join(', ');
+    });
+  }
+
+  /**
+   * Convert each Issue into array of strings, where the columns
+   * match this.columns.
+   * @return {Array<Array<string>>}
+   * @private
+   */
+  _convertIssuesToPlaintextArrays() {
+    return this.issues.map(this._convertIssueToPlaintextArray.bind(this));
+  }
+
+  /**
+   * Download content as csv. Conversion to CSV only on button click
+   * instead of on data change because CSV download is not often used.
+   * @param {MouseEvent} event
+   * @private
+   */
+  async _downloadCsv(event) {
+    event.preventDefault();
+
+    if (this.userDisplayName) {
+      // convert issues to array of arrays of strings
+      const issueData = this._convertIssuesToPlaintextArrays();
+
+      // convert the data into csv formatted string.
+      const csvDataString = prepareDataForDownload(issueData, this.columns);
+
+      // construct data href
+      const href = constructHref(csvDataString);
+
+      // modify a tag's href
+      this._csvDataHref = href;
+      await this.requestUpdate('_csvDataHref');
+
+      // click to trigger download
+      this._dataLink.click();
+
+      // reset dataHref
+      this._csvDataHref = '';
+    }
+  }
+};
+
+customElements.define('mr-issue-list', MrIssueList);
diff --git a/static_src/elements/framework/mr-issue-list/mr-issue-list.test.js b/static_src/elements/framework/mr-issue-list/mr-issue-list.test.js
new file mode 100644
index 0000000..3861e32
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-list/mr-issue-list.test.js
@@ -0,0 +1,1328 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {assert} from 'chai';
+import sinon from 'sinon';
+import * as projectV0 from 'reducers/projectV0.js';
+import {stringValuesForIssueField} from 'shared/issue-fields.js';
+import {MrIssueList} from './mr-issue-list.js';
+
+let element;
+
+const listRowIsFocused = (element, i) => {
+  const focused = element.shadowRoot.activeElement;
+  assert.equal(focused.tagName.toUpperCase(), 'TR');
+  assert.equal(focused.dataset.index, `${i}`);
+};
+
+describe('mr-issue-list', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-list');
+    element.extractFieldValues = projectV0.extractFieldValuesFromIssue({});
+    document.body.appendChild(element);
+
+    sinon.stub(element, '_baseUrl').returns('/p/chromium/issues/list');
+    sinon.stub(element, '_page');
+    sinon.stub(window, 'open');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    window.open.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueList);
+  });
+
+  it('issue summaries render', async () => {
+    element.issues = [
+      {summary: 'test issue'},
+      {summary: 'I have a summary'},
+    ];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const summaries = element.shadowRoot.querySelectorAll('.col-summary');
+
+    assert.equal(summaries.length, 2);
+
+    assert.equal(summaries[0].textContent.trim(), 'test issue');
+    assert.equal(summaries[1].textContent.trim(), 'I have a summary');
+  });
+
+  it('one word labels render in summary column', async () => {
+    element.issues = [
+      {
+        projectName: 'test',
+        localId: 1,
+        summary: 'test issue',
+        labelRefs: [
+          {label: 'ignore-multi-word-labels'},
+          {label: 'Security'},
+          {label: 'A11y'},
+        ],
+      },
+    ];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const summary = element.shadowRoot.querySelector('.col-summary');
+    const labels = summary.querySelectorAll('.summary-label');
+
+    assert.equal(labels.length, 2);
+
+    assert.equal(labels[0].textContent.trim(), 'Security');
+    assert.include(labels[0].href,
+        '/p/test/issues/list?q=label%3ASecurity');
+    assert.equal(labels[1].textContent.trim(), 'A11y');
+    assert.include(labels[1].href,
+        '/p/test/issues/list?q=label%3AA11y');
+  });
+
+  it('blocking column renders issue links', async () => {
+    element.issues = [
+      {
+        projectName: 'test',
+        localId: 1,
+        blockingIssueRefs: [
+          {projectName: 'test', localId: 2},
+          {projectName: 'test', localId: 3},
+        ],
+      },
+    ];
+    element.columns = ['Blocking'];
+
+    await element.updateComplete;
+
+    const blocking = element.shadowRoot.querySelector('.col-blocking');
+    const link = blocking.querySelector('mr-issue-link');
+    assert.equal(link.href, '/p/test/issues/detail?id=2');
+  });
+
+  it('blockedOn column renders issue links', async () => {
+    element.issues = [
+      {
+        projectName: 'test',
+        localId: 1,
+        blockedOnIssueRefs: [{projectName: 'test', localId: 2}],
+      },
+    ];
+    element.columns = ['BlockedOn'];
+
+    await element.updateComplete;
+
+    const blocking = element.shadowRoot.querySelector('.col-blockedon');
+    const link = blocking.querySelector('mr-issue-link');
+    assert.equal(link.href, '/p/test/issues/detail?id=2');
+  });
+
+  it('mergedInto column renders issue link', async () => {
+    element.issues = [
+      {
+        projectName: 'test',
+        localId: 1,
+        mergedIntoIssueRef: {projectName: 'test', localId: 2},
+      },
+    ];
+    element.columns = ['MergedInto'];
+
+    await element.updateComplete;
+
+    const blocking = element.shadowRoot.querySelector('.col-mergedinto');
+    const link = blocking.querySelector('mr-issue-link');
+    assert.equal(link.href, '/p/test/issues/detail?id=2');
+  });
+
+  it('clicking issue link does not trigger _navigateToIssue', async () => {
+    sinon.stub(element, '_navigateToIssue');
+
+    // Prevent the page from actually navigating on the link click.
+    const clickIntercepter = sinon.spy((e) => {
+      e.preventDefault();
+    });
+    window.addEventListener('click', clickIntercepter);
+
+    element.issues = [
+      {projectName: 'test', localId: 1, summary: 'test issue'},
+      {projectName: 'test', localId: 2, summary: 'I have a summary'},
+    ];
+    element.columns = ['ID'];
+
+    await element.updateComplete;
+
+    const idLink = element.shadowRoot.querySelector('.col-id > mr-issue-link');
+
+    idLink.click();
+
+    sinon.assert.calledOnce(clickIntercepter);
+    sinon.assert.notCalled(element._navigateToIssue);
+
+    window.removeEventListener('click', clickIntercepter);
+  });
+
+  it('clicking issue row opens issue', async () => {
+    element.issues = [{
+      summary: 'click me',
+      localId: 22,
+      projectName: 'chromium',
+    }];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const rowChild = element.shadowRoot.querySelector('.col-summary');
+    rowChild.click();
+
+    sinon.assert.calledWith(element._page, '/p/chromium/issues/detail?id=22');
+    sinon.assert.notCalled(window.open);
+  });
+
+  it('ctrl+click on row opens issue in new tab', async () => {
+    element.issues = [{
+      summary: 'click me',
+      localId: 24,
+      projectName: 'chromium',
+    }];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const rowChild = element.shadowRoot.querySelector('.col-summary');
+    rowChild.dispatchEvent(new MouseEvent('click',
+        {ctrlKey: true, bubbles: true}));
+
+    sinon.assert.calledWith(window.open,
+        '/p/chromium/issues/detail?id=24', '_blank', 'noopener');
+  });
+
+  it('meta+click on row opens issue in new tab', async () => {
+    element.issues = [{
+      summary: 'click me',
+      localId: 24,
+      projectName: 'chromium',
+    }];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const rowChild = element.shadowRoot.querySelector('.col-summary');
+    rowChild.dispatchEvent(new MouseEvent('click',
+        {metaKey: true, bubbles: true}));
+
+    sinon.assert.calledWith(window.open,
+        '/p/chromium/issues/detail?id=24', '_blank', 'noopener');
+  });
+
+  it('mouse wheel click on row opens issue in new tab', async () => {
+    element.issues = [{
+      summary: 'click me',
+      localId: 24,
+      projectName: 'chromium',
+    }];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const rowChild = element.shadowRoot.querySelector('.col-summary');
+    rowChild.dispatchEvent(new MouseEvent('auxclick',
+        {button: 1, bubbles: true}));
+
+    sinon.assert.calledWith(window.open,
+        '/p/chromium/issues/detail?id=24', '_blank', 'noopener');
+  });
+
+  it('right click on row does not navigate', async () => {
+    element.issues = [{
+      summary: 'click me',
+      localId: 24,
+      projectName: 'chromium',
+    }];
+    element.columns = ['Summary'];
+
+    await element.updateComplete;
+
+    const rowChild = element.shadowRoot.querySelector('.col-summary');
+    rowChild.dispatchEvent(new MouseEvent('auxclick',
+        {button: 2, bubbles: true}));
+
+    sinon.assert.notCalled(window.open);
+  });
+
+  it('AllLabels column renders', async () => {
+    element.issues = [
+      {labelRefs: [{label: 'test'}, {label: 'hello-world'}]},
+      {labelRefs: [{label: 'one-label'}]},
+    ];
+
+    element.columns = ['AllLabels'];
+
+    await element.updateComplete;
+
+    const labels = element.shadowRoot.querySelectorAll('.col-alllabels');
+
+    assert.equal(labels.length, 2);
+
+    assert.equal(labels[0].textContent.trim(), 'test, hello-world');
+    assert.equal(labels[1].textContent.trim(), 'one-label');
+  });
+
+  it('issues sorted into groups when groups defined', async () => {
+    element.issues = [
+      {ownerRef: {displayName: 'test@example.com'}},
+      {ownerRef: {displayName: 'test@example.com'}},
+      {ownerRef: {displayName: 'other.user@example.com'}},
+      {},
+    ];
+
+    element.columns = ['Owner'];
+    element.groups = ['Owner'];
+
+    await element.updateComplete;
+
+    const owners = element.shadowRoot.querySelectorAll('.col-owner');
+    assert.equal(owners.length, 4);
+
+    const groupHeaders = element.shadowRoot.querySelectorAll(
+        '.group-header');
+    assert.equal(groupHeaders.length, 3);
+
+    assert.include(groupHeaders[0].textContent,
+        '2 issues: Owner=test@example.com');
+    assert.include(groupHeaders[1].textContent,
+        '1 issue: Owner=other.user@example.com');
+    assert.include(groupHeaders[2].textContent, '1 issue: -has:Owner');
+  });
+
+  it('toggling group hides members', async () => {
+    element.issues = [
+      {ownerRef: {displayName: 'group1@example.com'}},
+      {ownerRef: {displayName: 'group2@example.com'}},
+    ];
+
+    element.columns = ['Owner'];
+    element.groups = ['Owner'];
+
+    await element.updateComplete;
+
+    const issueRows = element.shadowRoot.querySelectorAll('.list-row');
+    assert.equal(issueRows.length, 2);
+
+    assert.isFalse(issueRows[0].hidden);
+    assert.isFalse(issueRows[1].hidden);
+
+    const groupHeaders = element.shadowRoot.querySelectorAll(
+        '.group-header');
+    assert.equal(groupHeaders.length, 2);
+
+    // Toggle first group hidden.
+    groupHeaders[0].click();
+    await element.updateComplete;
+
+    assert.isTrue(issueRows[0].hidden);
+    assert.isFalse(issueRows[1].hidden);
+  });
+
+  it('reloadColspec navigates to page with new colspec', () => {
+    element.columns = ['ID', 'Summary'];
+    element._queryParams = {};
+
+    element.reloadColspec(['Summary', 'AllLabels']);
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?colspec=Summary%2BAllLabels');
+  });
+
+  it('updateSortSpec navigates to page with new sort option', async () => {
+    element.columns = ['ID', 'Summary'];
+    element._queryParams = {};
+
+    await element.updateComplete;
+
+    element.updateSortSpec('Summary', true);
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?sort=-summary');
+  });
+
+  it('updateSortSpec navigates to first page when on later page', async () => {
+    element.columns = ['ID', 'Summary'];
+    element._queryParams = {start: '100', q: 'owner:me'};
+
+    await element.updateComplete;
+
+    element.updateSortSpec('Summary', true);
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?q=owner%3Ame&sort=-summary');
+  });
+
+  it('updateSortSpec prepends new option to existing sort', async () => {
+    element.columns = ['ID', 'Summary', 'Owner'];
+    element._queryParams = {sort: '-summary+owner'};
+
+    await element.updateComplete;
+
+    element.updateSortSpec('ID');
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?sort=id%20-summary%20owner');
+  });
+
+  it('updateSortSpec removes existing instances of sorted column', async () => {
+    element.columns = ['ID', 'Summary', 'Owner'];
+    element._queryParams = {sort: '-summary+owner+owner'};
+
+    await element.updateComplete;
+
+    element.updateSortSpec('Owner', true);
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?sort=-owner%20-summary');
+  });
+
+  it('_uniqueValuesByColumn re-computed when columns update', async () => {
+    element.issues = [
+      {id: 1, projectName: 'chromium'},
+      {id: 2, projectName: 'chromium'},
+      {id: 3, projectName: 'chrOmiUm'},
+      {id: 1, projectName: 'other'},
+    ];
+    element.columns = [];
+    await element.updateComplete;
+
+    assert.deepEqual(element._uniqueValuesByColumn, new Map());
+
+    element.columns = ['project'];
+    await element.updateComplete;
+
+    assert.deepEqual(element._uniqueValuesByColumn,
+        new Map([['project', new Set(['chromium', 'chrOmiUm', 'other'])]]));
+  });
+
+  it('showOnly adds new search term to query', async () => {
+    element.currentQuery = 'owner:me';
+    element._queryParams = {};
+
+    await element.updateComplete;
+
+    element.showOnly('Priority', 'High');
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?q=owner%3Ame%20priority%3DHigh');
+  });
+
+  it('addColumn adds a column', () => {
+    element.columns = ['ID', 'Summary'];
+
+    sinon.stub(element, 'reloadColspec');
+
+    element.addColumn('AllLabels');
+
+    sinon.assert.calledWith(element.reloadColspec,
+        ['ID', 'Summary', 'AllLabels']);
+  });
+
+  it('removeColumn removes a column', () => {
+    element.columns = ['ID', 'Summary'];
+
+    sinon.stub(element, 'reloadColspec');
+
+    element.removeColumn(0);
+
+    sinon.assert.calledWith(element.reloadColspec, ['Summary']);
+  });
+
+  it('clicking hide column in column header removes column', async () => {
+    element.columns = ['ID', 'Summary'];
+
+    sinon.stub(element, 'removeColumn');
+
+    await element.updateComplete;
+
+    const dropdown = element.shadowRoot.querySelector('.dropdown-summary');
+
+    dropdown.clickItem(0); // Hide column.
+
+    sinon.assert.calledWith(element.removeColumn, 1);
+  });
+
+  it('starring disabled when starringEnabled is false', async () => {
+    element.starringEnabled = false;
+    element.issues = [
+      {projectName: 'test', localId: 1, summary: 'test issue'},
+      {projectName: 'test', localId: 2, summary: 'I have a summary'},
+    ];
+
+    await element.updateComplete;
+
+    let stars = element.shadowRoot.querySelectorAll('mr-issue-star');
+    assert.equal(stars.length, 0);
+
+    element.starringEnabled = true;
+    await element.updateComplete;
+
+    stars = element.shadowRoot.querySelectorAll('mr-issue-star');
+    assert.equal(stars.length, 2);
+  });
+
+  describe('issue sorting and grouping enabled', () => {
+    beforeEach(() => {
+      element.sortingAndGroupingEnabled = true;
+    });
+
+    it('clicking sort up column header sets sort spec', async () => {
+      element.columns = ['ID', 'Summary'];
+
+      sinon.stub(element, 'updateSortSpec');
+
+      await element.updateComplete;
+
+      const dropdown = element.shadowRoot.querySelector('.dropdown-summary');
+
+      dropdown.clickItem(0); // Sort up.
+
+      sinon.assert.calledWith(element.updateSortSpec, 'Summary');
+    });
+
+    it('clicking sort down column header sets sort spec', async () => {
+      element.columns = ['ID', 'Summary'];
+
+      sinon.stub(element, 'updateSortSpec');
+
+      await element.updateComplete;
+
+      const dropdown = element.shadowRoot.querySelector('.dropdown-summary');
+
+      dropdown.clickItem(1); // Sort down.
+
+      sinon.assert.calledWith(element.updateSortSpec, 'Summary', true);
+    });
+
+    it('clicking group rows column header groups rows', async () => {
+      element.columns = ['Owner', 'Priority'];
+      element.groups = ['Status'];
+
+      sinon.spy(element, 'addGroupBy');
+
+      await element.updateComplete;
+
+      const dropdown = element.shadowRoot.querySelector('.dropdown-owner');
+      dropdown.clickItem(3); // Group rows.
+
+      sinon.assert.calledWith(element.addGroupBy, 0);
+
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?groupby=Owner%20Status&colspec=Priority');
+    });
+  });
+
+  describe('issue selection', () => {
+    beforeEach(() => {
+      element.selectionEnabled = true;
+    });
+
+    it('selections disabled when selectionEnabled is false', async () => {
+      element.selectionEnabled = false;
+      element.issues = [
+        {projectName: 'test', localId: 1, summary: 'test issue'},
+        {projectName: 'test', localId: 2, summary: 'I have a summary'},
+      ];
+
+      await element.updateComplete;
+
+      let checkboxes = element.shadowRoot.querySelectorAll('.issue-checkbox');
+      assert.equal(checkboxes.length, 0);
+
+      element.selectionEnabled = true;
+      await element.updateComplete;
+
+      checkboxes = element.shadowRoot.querySelectorAll('.issue-checkbox');
+      assert.equal(checkboxes.length, 2);
+    });
+
+    it('selected issues render selected attribute', async () => {
+      element.issues = [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'another issue', localId: 2, projectName: 'proj'},
+        {summary: 'issue 2', localId: 3, projectName: 'proj'},
+      ];
+      element.columns = ['Summary'];
+
+      await element.updateComplete;
+
+      element._selectedIssues = new Set(['proj:1']);
+
+      await element.updateComplete;
+
+      const issues = element.shadowRoot.querySelectorAll('tr[selected]');
+
+      assert.equal(issues.length, 1);
+      assert.equal(issues[0].dataset.index, '0');
+      assert.include(issues[0].textContent, 'issue 1');
+    });
+
+    it('select all / none conditionally shows tooltip', async () => {
+      element.issues = [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'issue 2', localId: 2, projectName: 'proj'},
+      ];
+
+      await element.updateComplete;
+      assert.deepEqual(element.selectedIssues, []);
+
+      const selectAll = element.shadowRoot.querySelector('.select-all');
+
+      // No issues selected, offer "Select All".
+      assert.equal(selectAll.title, 'Select All');
+      assert.equal(selectAll.getAttribute('aria-label'), 'Select All');
+
+      selectAll.click();
+
+      await element.updateComplete;
+
+      // Some issues selected, offer "Select None".
+      assert.equal(selectAll.title, 'Select None');
+      assert.equal(selectAll.getAttribute('aria-label'), 'Select None');
+    });
+
+    it('clicking select all selects all issues', async () => {
+      element.issues = [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'issue 2', localId: 2, projectName: 'proj'},
+      ];
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, []);
+
+      const selectAll = element.shadowRoot.querySelector('.select-all');
+      selectAll.click();
+
+      assert.deepEqual(element.selectedIssues, [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'issue 2', localId: 2, projectName: 'proj'},
+      ]);
+    });
+
+    it('when checked select all deselects all issues', async () => {
+      element.issues = [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'issue 2', localId: 2, projectName: 'proj'},
+      ];
+
+      await element.updateComplete;
+
+      element._selectedIssues = new Set(['proj:1', 'proj:2']);
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'issue 2', localId: 2, projectName: 'proj'},
+      ]);
+
+      const selectAll = element.shadowRoot.querySelector('.select-all');
+      selectAll.click();
+
+      assert.deepEqual(element.selectedIssues, []);
+    });
+
+    it('selected issues added when issues checked', async () => {
+      element.issues = [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'another issue', localId: 2, projectName: 'proj'},
+        {summary: 'issue 2', localId: 3, projectName: 'proj'},
+      ];
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, []);
+
+      const checkboxes = element.shadowRoot.querySelectorAll('.issue-checkbox');
+
+      assert.equal(checkboxes.length, 3);
+
+      checkboxes[2].dispatchEvent(new MouseEvent('click'));
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {summary: 'issue 2', localId: 3, projectName: 'proj'},
+      ]);
+
+      checkboxes[0].dispatchEvent(new MouseEvent('click'));
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {summary: 'issue 1', localId: 1, projectName: 'proj'},
+        {summary: 'issue 2', localId: 3, projectName: 'proj'},
+      ]);
+    });
+
+    it('shift+click selects issues in a range', async () => {
+      element.issues = [
+        {localId: 1, projectName: 'proj'},
+        {localId: 2, projectName: 'proj'},
+        {localId: 3, projectName: 'proj'},
+        {localId: 4, projectName: 'proj'},
+        {localId: 5, projectName: 'proj'},
+      ];
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, []);
+
+      const checkboxes = element.shadowRoot.querySelectorAll('.issue-checkbox');
+
+      // First click.
+      checkboxes[0].dispatchEvent(new MouseEvent('click'));
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {localId: 1, projectName: 'proj'},
+      ]);
+
+      // Second click.
+      checkboxes[3].dispatchEvent(new MouseEvent('click', {shiftKey: true}));
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {localId: 1, projectName: 'proj'},
+        {localId: 2, projectName: 'proj'},
+        {localId: 3, projectName: 'proj'},
+        {localId: 4, projectName: 'proj'},
+      ]);
+
+      // It's possible to chain Shift+Click operations.
+      checkboxes[2].dispatchEvent(new MouseEvent('click', {shiftKey: true}));
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {localId: 1, projectName: 'proj'},
+        {localId: 2, projectName: 'proj'},
+      ]);
+    });
+
+    it('fires selectionChange events', async () => {
+      const listener = sinon.stub();
+      element.addEventListener('selectionChange', listener);
+
+      // Changing the issue list clears the selection and fires an event.
+      element.issues = [{localId: 1, projectName: 'proj'}];
+      await element.updateComplete;
+      // Selecting all/deselecting all fires an event.
+      element.shadowRoot.querySelector('.select-all').click();
+      await element.updateComplete;
+      // Selecting an individual issue fires an event.
+      element.shadowRoot.querySelectorAll('.issue-checkbox')[0].click();
+
+      sinon.assert.calledThrice(listener);
+    });
+  });
+
+  describe('cursor', () => {
+    beforeEach(() => {
+      element.issues = [
+        {localId: 1, projectName: 'chromium'},
+        {localId: 2, projectName: 'chromium'},
+      ];
+    });
+
+    it('empty when no initialCursor', () => {
+      assert.deepEqual(element.cursor, {});
+
+      element.initialCursor = '';
+      assert.deepEqual(element.cursor, {});
+    });
+
+    it('parses initialCursor value', () => {
+      element.initialCursor = '1';
+      element.projectName = 'chromium';
+
+      assert.deepEqual(element.cursor, {projectName: 'chromium', localId: 1});
+
+      element.initialCursor = 'chromium:1';
+      assert.deepEqual(element.cursor, {projectName: 'chromium', localId: 1});
+    });
+
+    it('overrides initialCursor with _localCursor', () => {
+      element.initialCursor = 'chromium:1';
+      element._localCursor = {projectName: 'gerrit', localId: 2};
+
+      assert.deepEqual(element.cursor, {projectName: 'gerrit', localId: 2});
+    });
+
+    it('initialCursor renders cursor and focuses element', async () => {
+      element.initialCursor = 'chromium:1';
+
+      await element.updateComplete;
+
+      const row = element.shadowRoot.querySelector('.row-0');
+      assert.isTrue(row.hasAttribute('cursored'));
+      listRowIsFocused(element, 0);
+    });
+
+    it('cursor value updated when row is focused', async () => {
+      element.initialCursor = 'chromium:1';
+
+      await element.updateComplete;
+
+      // HTMLElement.focus() seems to cause a timing related flake here.
+      element.shadowRoot.querySelector('.row-1').dispatchEvent(
+          new Event('focus'));
+
+      assert.deepEqual(element.cursor, {projectName: 'chromium', localId: 2});
+    });
+  });
+
+  describe('hot keys', () => {
+    beforeEach(() => {
+      element.issues = [
+        {localId: 1, projectName: 'chromium'},
+        {localId: 2, projectName: 'chromium'},
+        {localId: 3, projectName: 'chromium'},
+      ];
+
+      element.selectionEnabled = true;
+
+      sinon.stub(element, '_navigateToIssue');
+    });
+
+    afterEach(() => {
+      element._navigateToIssue.restore();
+    });
+
+    it('global keydown listener removed on disconnect', async () => {
+      sinon.stub(element, '_boundRunListHotKeys');
+
+      await element.updateComplete;
+
+      window.dispatchEvent(new Event('keydown'));
+      sinon.assert.calledOnce(element._boundRunListHotKeys);
+
+      document.body.removeChild(element);
+
+      window.dispatchEvent(new Event('keydown'));
+      sinon.assert.calledOnce(element._boundRunListHotKeys);
+
+      document.body.appendChild(element);
+    });
+
+    it('pressing j defaults to first issue', async () => {
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+
+      listRowIsFocused(element, 0);
+    });
+
+    it('pressing j focuses next issue', async () => {
+      element.initialCursor = 'chromium:1';
+
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+
+      listRowIsFocused(element, 1);
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+
+      listRowIsFocused(element, 2);
+    });
+
+    it('pressing j at the end of the list loops around', async () => {
+      await element.updateComplete;
+
+      element.shadowRoot.querySelector('.row-2').focus();
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+
+      listRowIsFocused(element, 0);
+    });
+
+
+    it('pressing k defaults to last issue', async () => {
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+
+      listRowIsFocused(element, 2);
+    });
+
+    it('pressing k focuses previous issue', async () => {
+      element.initialCursor = 'chromium:3';
+
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+
+      listRowIsFocused(element, 1);
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+
+      listRowIsFocused(element, 0);
+    });
+
+    it('pressing k at the start of the list loops around', async () => {
+      await element.updateComplete;
+
+      element.shadowRoot.querySelector('.row-0').focus();
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+
+      listRowIsFocused(element, 2);
+    });
+
+    it('j and k keys treat row as focused if child is focused', async () => {
+      await element.updateComplete;
+
+      element.shadowRoot.querySelector('.row-1').querySelector(
+          'mr-issue-link').focus();
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+      listRowIsFocused(element, 2);
+
+      element.shadowRoot.querySelector('.row-1').querySelector(
+          'mr-issue-link').focus();
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+      listRowIsFocused(element, 0);
+    });
+
+    it('j and k keys stay on one element when one issue', async () => {
+      element.issues = [{localId: 2, projectName: 'chromium'}];
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+      listRowIsFocused(element, 0);
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+      listRowIsFocused(element, 0);
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+      listRowIsFocused(element, 0);
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+      listRowIsFocused(element, 0);
+    });
+
+    it('j and k no-op when event is from input', async () => {
+      const input = document.createElement('input');
+      document.body.appendChild(input);
+
+      await element.updateComplete;
+
+      input.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+      assert.isNull(element.shadowRoot.activeElement);
+
+      input.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+      assert.isNull(element.shadowRoot.activeElement);
+
+      document.body.removeChild(input);
+    });
+
+    it('j and k no-op when event is from shadowDOM input', async () => {
+      const input = document.createElement('input');
+      const root = document.createElement('div');
+
+      root.attachShadow({mode: 'open'});
+      root.shadowRoot.appendChild(input);
+
+      document.body.appendChild(root);
+
+      await element.updateComplete;
+
+      input.dispatchEvent(new KeyboardEvent('keydown', {key: 'j'}));
+      assert.isNull(element.shadowRoot.activeElement);
+
+      input.dispatchEvent(new KeyboardEvent('keydown', {key: 'k'}));
+      assert.isNull(element.shadowRoot.activeElement);
+
+      document.body.removeChild(root);
+    });
+
+    describe('starring issue', () => {
+      beforeEach(() => {
+        element.starringEnabled = true;
+        element.initialCursor = 'chromium:2';
+      });
+
+      it('pressing s stars focused issue', async () => {
+        sinon.stub(element, '_starIssue');
+        await element.updateComplete;
+
+        window.dispatchEvent(new KeyboardEvent('keydown', {key: 's'}));
+
+        sinon.assert.calledWith(element._starIssue,
+            {localId: 2, projectName: 'chromium'});
+      });
+
+      it('starIssue does not star issue while stars are fetched', () => {
+        sinon.stub(element, '_starIssueInternal');
+        element._fetchingStarredIssues = true;
+
+        element._starIssue({localId: 2, projectName: 'chromium'});
+
+        sinon.assert.notCalled(element._starIssueInternal);
+      });
+
+      it('starIssue does not star when issue is being starred', () => {
+        sinon.stub(element, '_starIssueInternal');
+        element._starringIssues = new Map([['chromium:2', {requesting: true}]]);
+
+        element._starIssue({localId: 2, projectName: 'chromium'});
+
+        sinon.assert.notCalled(element._starIssueInternal);
+      });
+
+      it('starIssue stars issue when issue is not being starred', () => {
+        sinon.stub(element, '_starIssueInternal');
+        element._starringIssues = new Map([
+          ['chromium:2', {requesting: false}],
+        ]);
+
+        element._starIssue({localId: 2, projectName: 'chromium'});
+
+        sinon.assert.calledWith(element._starIssueInternal,
+            {localId: 2, projectName: 'chromium'}, true);
+      });
+
+      it('starIssue unstars issue when issue is already starred', () => {
+        sinon.stub(element, '_starIssueInternal');
+        element._starredIssues = new Set(['chromium:2']);
+
+        element._starIssue({localId: 2, projectName: 'chromium'});
+
+        sinon.assert.calledWith(element._starIssueInternal,
+            {localId: 2, projectName: 'chromium'}, false);
+      });
+    });
+
+    it('pressing x selects focused issue', async () => {
+      element.initialCursor = 'chromium:2';
+
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'x'}));
+
+      await element.updateComplete;
+
+      assert.deepEqual(element.selectedIssues, [
+        {localId: 2, projectName: 'chromium'},
+      ]);
+    });
+
+    it('pressing o navigates to focused issue', async () => {
+      element.initialCursor = 'chromium:2';
+
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'o'}));
+
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(element._navigateToIssue);
+      sinon.assert.calledWith(element._navigateToIssue,
+          {localId: 2, projectName: 'chromium'}, false);
+    });
+
+    it('pressing shift+o opens focused issue in new tab', async () => {
+      element.initialCursor = 'chromium:2';
+
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown',
+          {key: 'O', shiftKey: true}));
+
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(element._navigateToIssue);
+      sinon.assert.calledWith(element._navigateToIssue,
+          {localId: 2, projectName: 'chromium'}, true);
+    });
+
+    it('enter keydown on row navigates to issue', async () => {
+      await element.updateComplete;
+
+      const row = element.shadowRoot.querySelector('.row-1');
+
+      row.dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'Enter', bubbles: true}));
+
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(element._navigateToIssue);
+      sinon.assert.calledWith(
+          element._navigateToIssue, {localId: 2, projectName: 'chromium'},
+          false);
+    });
+
+    it('ctrl+enter keydown on row navigates to issue in new tab', async () => {
+      await element.updateComplete;
+
+      const row = element.shadowRoot.querySelector('.row-1');
+
+      // Note: metaKey would also work, but this is covered by click tests.
+      row.dispatchEvent(new KeyboardEvent(
+          'keydown', {key: 'Enter', ctrlKey: true, bubbles: true}));
+
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(element._navigateToIssue);
+      sinon.assert.calledWith(element._navigateToIssue,
+          {localId: 2, projectName: 'chromium'}, true);
+    });
+
+    it('enter keypress outside row is ignored', async () => {
+      await element.updateComplete;
+
+      window.dispatchEvent(new KeyboardEvent('keydown', {key: 'Enter'}));
+
+      await element.updateComplete;
+
+      sinon.assert.notCalled(element._navigateToIssue);
+    });
+  });
+
+  describe('_convertIssueToPlaintextArray', () => {
+    it('returns an array with as many entries as this.columns.length', () => {
+      element.columns = ['summary'];
+      const result = element._convertIssueToPlaintextArray({
+        summary: 'test issue',
+      });
+      assert.equal(element.columns.length, result.length);
+    });
+
+    it('for column id uses issueRefToString', async () => {
+      const projectName = 'some_project_name';
+      const otherProjectName = 'some_other_project';
+      const localId = '123';
+      element.columns = ['ID'];
+      element.projectName = projectName;
+
+      element.extractFieldValues = (issue, fieldName) =>
+        stringValuesForIssueField(issue, fieldName, projectName);
+
+      let result;
+      result = element._convertIssueToPlaintextArray({
+        localId,
+        projectName,
+      });
+      assert.equal(localId, result[0]);
+
+      result = element._convertIssueToPlaintextArray({
+        localId,
+        projectName: otherProjectName,
+      });
+      assert.equal(`${otherProjectName}:${localId}`, result[0]);
+    });
+
+    it('uses extractFieldValues', () => {
+      element.columns = ['summary', 'notsummary', 'anotherColumn'];
+      element.extractFieldValues = sinon.fake.returns(['a', 'b']);
+
+      element._convertIssueToPlaintextArray({summary: 'test issue'});
+      sinon.assert.callCount(element.extractFieldValues,
+          element.columns.length);
+    });
+
+    it('joins the result of extractFieldValues with ", "', () => {
+      element.columns = ['notSummary'];
+      element.extractFieldValues = sinon.fake.returns(['a', 'b']);
+
+      const result = element._convertIssueToPlaintextArray({
+        summary: 'test issue',
+      });
+      assert.deepEqual(result, ['a, b']);
+    });
+  });
+
+  describe('_convertIssuesToPlaintextArrays', () => {
+    it('maps this.issues with this._convertIssueToPlaintextArray', () => {
+      element._convertIssueToPlaintextArray = sinon.fake.returns(['foobar']);
+
+      element.columns = ['summary'];
+      element.issues = [
+        {summary: 'test issue'},
+        {summary: 'I have a summary'},
+      ];
+      const result = element._convertIssuesToPlaintextArrays();
+
+      assert.deepEqual([['foobar'], ['foobar']], result);
+      sinon.assert.callCount(element._convertIssueToPlaintextArray,
+          element.issues.length);
+    });
+  });
+
+  it('drag-and-drop', async () => {
+    element.rerank = () => {};
+    element.issues = [
+      {projectName: 'project', localId: 123, summary: 'test issue'},
+      {projectName: 'project', localId: 456, summary: 'I have a summary'},
+      {projectName: 'project', localId: 789, summary: 'third issue'},
+    ];
+    await element.updateComplete;
+
+    const rows = element._getRows();
+
+    // Mouse down on the middle element!
+    const secondRow = rows[1];
+    const dragHandle = secondRow.firstElementChild;
+    const mouseDown = new MouseEvent('mousedown', {clientX: 0, clientY: 0});
+    dragHandle.dispatchEvent(mouseDown);
+
+    assert.deepEqual(element._dragging, true);
+    assert.deepEqual(element.cursor, {projectName: 'project', localId: 456});
+    assert.deepEqual(element.selectedIssues, [element.issues[1]]);
+
+    // Drag the middle element to the end!
+    const mouseMove = new MouseEvent('mousemove', {clientX: 0, clientY: 100});
+    window.dispatchEvent(mouseMove);
+
+    assert.deepEqual(rows[0].style['transform'], '');
+    assert.deepEqual(rows[1].style['transform'], 'translate(0px, 100px)');
+    assert.match(rows[2].style['transform'], /^translate\(0px, -\d+px\)$/);
+
+    // Mouse up!
+    const mouseUp = new MouseEvent('mouseup', {clientX: 0, clientY: 100});
+    window.dispatchEvent(mouseUp);
+
+    assert.deepEqual(element._dragging, false);
+    assert.match(rows[1].style['transform'], /^translate\(0px, \d+px\)$/);
+  });
+
+  describe('CSV download', () => {
+    let _downloadCsvSpy;
+    let convertStub;
+
+    beforeEach(() => {
+      element.userDisplayName = 'notempty';
+      _downloadCsvSpy = sinon.spy(element, '_downloadCsv');
+      convertStub = sinon
+          .stub(element, '_convertIssuesToPlaintextArrays')
+          .returns([['']]);
+    });
+
+    afterEach(() => {
+      _downloadCsvSpy.restore();
+      convertStub.restore();
+    });
+
+    it('hides download link for anonymous users', async () => {
+      element.userDisplayName = '';
+      await element.updateComplete;
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+      assert.isNull(downloadLink);
+    });
+
+    it('renders a #download-link', async () => {
+      await element.updateComplete;
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+      assert.isNotNull(downloadLink);
+      assert.equal('inline', window.getComputedStyle(downloadLink).display);
+    });
+
+    it('renders a #hidden-data-link', async () => {
+      await element.updateComplete;
+      assert.isNotNull(element._dataLink);
+      const expected = element.shadowRoot.querySelector('#hidden-data-link');
+      assert.equal(expected, element._dataLink);
+    });
+
+    it('hides #hidden-data-link', async () => {
+      await element.updateComplete;
+      const _dataLink = element.shadowRoot.querySelector('#hidden-data-link');
+      assert.equal('none', window.getComputedStyle(_dataLink).display);
+    });
+
+    it('calls _downloadCsv on click', async () => {
+      await element.updateComplete;
+      sinon.stub(element._dataLink, 'click');
+
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+      downloadLink.click();
+      await element.requestUpdate('_csvDataHref');
+
+      sinon.assert.calledOnce(_downloadCsvSpy);
+      element._dataLink.click.restore();
+    });
+
+    it('converts issues into arrays of plaintext data', async () => {
+      await element.updateComplete;
+      sinon.stub(element._dataLink, 'click');
+
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+      downloadLink.click();
+      await element.requestUpdate('_csvDataHref');
+
+      sinon.assert.calledOnce(convertStub);
+      element._dataLink.click.restore();
+    });
+
+    it('triggers _dataLink click after #downloadLink click', async () => {
+      await element.updateComplete;
+      const dataLinkStub = sinon.stub(element._dataLink, 'click');
+
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+
+      downloadLink.click();
+
+      await element.requestUpdate('_csvDataHref');
+      sinon.assert.calledOnce(dataLinkStub);
+
+      element._dataLink.click.restore();
+    });
+
+    it('triggers _csvDataHref update and _dataLink click', async () => {
+      await element.updateComplete;
+      assert.equal('', element._csvDataHref);
+      const downloadStub = sinon.stub(element._dataLink, 'click');
+
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+
+      downloadLink.click();
+      assert.notEqual('', element._csvDataHref);
+      await element.requestUpdate('_csvDataHref');
+      sinon.assert.calledOnce(downloadStub);
+
+      element._dataLink.click.restore();
+    });
+
+    it('resets _csvDataHref', async () => {
+      await element.updateComplete;
+      assert.equal('', element._csvDataHref);
+
+      sinon.stub(element._dataLink, 'click');
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+      downloadLink.click();
+      assert.notEqual('', element._csvDataHref);
+
+      await element.requestUpdate('_csvDataHref');
+      assert.equal('', element._csvDataHref);
+      element._dataLink.click.restore();
+    });
+
+    it('does nothing for anonymous users', async () => {
+      await element.updateComplete;
+
+      element.userDisplayName = '';
+
+      const downloadStub = sinon.stub(element._dataLink, 'click');
+
+      const downloadLink = element.shadowRoot.querySelector('#download-link');
+
+      downloadLink.click();
+      await element.requestUpdate('_csvDataHref');
+      sinon.assert.notCalled(downloadStub);
+
+      element._dataLink.click.restore();
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-issue-list/mr-show-columns-dropdown.js b/static_src/elements/framework/mr-issue-list/mr-show-columns-dropdown.js
new file mode 100644
index 0000000..5d6a97b
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-list/mr-show-columns-dropdown.js
@@ -0,0 +1,310 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {css} from 'lit-element';
+import {MrDropdown} from 'elements/framework/mr-dropdown/mr-dropdown.js';
+import page from 'page';
+import qs from 'qs';
+import {connectStore} from 'reducers/base.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import {fieldTypes, fieldsForIssue} from 'shared/issue-fields.js';
+
+
+/**
+ * `<mr-show-columns-dropdown>`
+ *
+ * Issue list column options dropdown.
+ *
+ */
+export class MrShowColumnsDropdown extends connectStore(MrDropdown) {
+  /** @override */
+  static get styles() {
+    return [
+      ...MrDropdown.styles,
+      css`
+        :host {
+          font-weight: normal;
+          color: var(--chops-link-color);
+          --mr-dropdown-icon-color: var(--chops-link-color);
+          --mr-dropdown-anchor-padding: 3px 8px;
+          --mr-dropdown-anchor-font-weight: bold;
+          --mr-dropdown-menu-min-width: 150px;
+          --mr-dropdown-menu-font-size: var(--chops-main-font-size);
+          --mr-dropdown-menu-icon-size: var(--chops-main-font-size);
+          /* Because we're using a sticky header, we need to make sure the
+           * dropdown cannot be taller than the screen. */
+          --mr-dropdown-menu-max-height: 80vh;
+          --mr-dropdown-menu-overflow: auto;
+        }
+      `,
+    ];
+  }
+  /** @override */
+  static get properties() {
+    return {
+      ...MrDropdown.properties,
+      /**
+       * Array of displayed columns.
+       */
+      columns: {type: Array},
+      /**
+       * Array of displayed issues.
+       */
+      issues: {type: Array},
+      /**
+       * Array of unique phase names to prepend to phase field columns.
+       */
+      // TODO(dtu): Delete after removing EZT hotlist issue list.
+      phaseNames: {type: Array},
+      /**
+       * Array of built in fields that are available outside of project
+       * configuration.
+       */
+      defaultFields: {type: Array},
+      _fieldDefs: {type: Array},
+      _labelPrefixFields: {type: Array},
+      // TODO(zhangtiff): Delete this legacy integration after removing
+      // the EZT issue list view.
+      onHideColumn: {type: Object},
+      onShowColumn: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    // Inherited from MrDropdown.
+    this.label = 'Show columns';
+    this.icon = 'more_horiz';
+
+    this.columns = [];
+    /** @type {Array<Issue>} */
+    this.issues = [];
+    this.phaseNames = [];
+    this.defaultFields = [];
+
+    // TODO(dtu): Delete after removing EZT hotlist issue list.
+    this._fieldDefs = [];
+    this._labelPrefixFields = [];
+
+    this._queryParams = {};
+    this._page = page;
+
+    // TODO(zhangtiff): Delete this legacy integration after removing
+    // the EZT issue list view.
+    this.onHideColumn = null;
+    this.onShowColumn = null;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._fieldDefs = projectV0.fieldDefs(state) || [];
+    this._labelPrefixFields = projectV0.labelPrefixFields(state) || [];
+    this._queryParams = sitewide.queryParams(state);
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (this.issues.length) {
+      this.items = this.columnOptions();
+    } else {
+      // TODO(dtu): Delete after removing EZT hotlist issue list.
+      this.items = this.columnOptionsEzt(
+          this.defaultFields, this._fieldDefs, this._labelPrefixFields,
+          this.columns, this.phaseNames);
+    }
+
+    super.update(changedProperties);
+  }
+
+  /**
+   * Computes the column options available in the list view based on Issues.
+   * @return {Array<MenuItem>}
+   */
+  columnOptions() {
+    const availableFields = new Set(this.defaultFields);
+    this.issues.forEach((issue) => {
+      fieldsForIssue(issue).forEach((field) => {
+        availableFields.add(field);
+      });
+    });
+
+    // Remove selected columns from available fields.
+    this.columns.forEach((field) => availableFields.delete(field));
+    const sortedFields = [...availableFields].sort();
+
+    return [
+      // Show selected options first.
+      ...this.columns.map((field, i) => ({
+        icon: 'check',
+        text: field,
+        handler: () => this._removeColumn(i),
+      })),
+      // Unselected options come next.
+      ...sortedFields.map((field) => ({
+        icon: '',
+        text: field,
+        handler: () => this._addColumn(field),
+      })),
+    ];
+  }
+
+  // TODO(dtu): Delete after removing EZT hotlist issue list.
+  /**
+   * Computes the column options available in the list view based on project
+   * config data.
+   * @param {Array<string>} defaultFields List of built in columns.
+   * @param {Array<FieldDef>} fieldDefs List of custom fields configured in the
+   *   viewed project.
+   * @param {Array<string>} labelPrefixes List of available label prefixes for
+   *   the current project config..
+   * @param {Array<string>} selectedColumns List of columns the user is
+   *   currently viewing.
+   * @param {Array<string>} phaseNames All phase namws present in the currently
+   *   viewed issue list.
+   * @return {Array<MenuItem>}
+   */
+  columnOptionsEzt(defaultFields, fieldDefs, labelPrefixes, selectedColumns,
+      phaseNames) {
+    const selectedOptions = new Set(
+        selectedColumns.map((col) => col.toLowerCase()));
+
+    const availableFields = new Set();
+
+    // Built-in, hard-coded fields like Owner, Status, and Labels.
+    defaultFields.forEach((field) => this._addUnselectedField(
+        availableFields, field, selectedOptions));
+
+    // Custom fields.
+    fieldDefs.forEach((fd) => {
+      const {fieldRef, isPhaseField} = fd;
+      const {fieldName, type} = fieldRef;
+      if (isPhaseField) {
+        // If the custom field belongs to phases, prefix the phase name for
+        // each phase.
+        phaseNames.forEach((phaseName) => {
+          this._addUnselectedField(
+              availableFields, `${phaseName}.${fieldName}`, selectedOptions);
+        });
+        return;
+      }
+
+      // TODO(zhangtiff): Prefix custom fields with "approvalName" defined by
+      // the approval name after deprecating the old issue list page.
+
+      // Most custom fields can be directly added to the list with no
+      // modifications.
+      this._addUnselectedField(
+          availableFields, fieldName, selectedOptions);
+
+      // If the custom field is type approval, then it also has a built in
+      // "Approver" field.
+      if (type === fieldTypes.APPROVAL_TYPE) {
+        this._addUnselectedField(
+            availableFields, `${fieldName}-Approver`, selectedOptions);
+      }
+    });
+
+    // Fields inferred from label prefixes.
+    labelPrefixes.forEach((field) => this._addUnselectedField(
+        availableFields, field, selectedOptions));
+
+    const sortedFields = [...availableFields];
+    sortedFields.sort();
+
+    return [
+      ...selectedColumns.map((field, i) => ({
+        icon: 'check',
+        text: field,
+        handler: () => this._removeColumn(i),
+      })),
+      ...sortedFields.map((field) => ({
+        icon: '',
+        text: field,
+        handler: () => this._addColumn(field),
+      })),
+    ];
+  }
+
+  /**
+   * Helper that mutates a Set of column names in place, adding a given
+   * field only if it doesn't already show up in the list of selected
+   * fields.
+   * @param {Set<string>} availableFields Set of column names to mutate.
+   * @param {string} field Name of the field being added to the options.
+   * @param {Set<string>} selectedOptions Set of fieldNames that the user
+   *   is viewing.
+   * @private
+   */
+  _addUnselectedField(availableFields, field, selectedOptions) {
+    if (!selectedOptions.has(field.toLowerCase())) {
+      availableFields.add(field);
+    }
+  }
+
+  /**
+   * Removes the column at a particular index.
+   *
+   * @param {number} i the issue column to be removed.
+   */
+  _removeColumn(i) {
+    if (this.onHideColumn) {
+      if (!this.onHideColumn(this.columns[i])) {
+        return;
+      }
+    }
+    const columns = [...this.columns];
+    columns.splice(i, 1);
+    this._reloadColspec(columns);
+  }
+
+  /**
+   * Adds a new column to a particular index.
+   *
+   * @param {string} name of the new column added.
+   */
+  _addColumn(name) {
+    if (this.onShowColumn) {
+      if (!this.onShowColumn(name)) {
+        return;
+      }
+    }
+    this._reloadColspec([...this.columns, name]);
+  }
+
+  /**
+   * Reflects changes to the columns of an issue list to the URL, through
+   * frontend routing.
+   *
+   * @param {Array} newColumns the new colspec to set in the URL.
+   */
+  _reloadColspec(newColumns) {
+    this._updateQueryParams({colspec: newColumns.join(' ')});
+  }
+
+  /**
+   * Navigates to the same URL as the current page, but with query
+   * params updated.
+   *
+   * @param {Object} newParams keys and values of the queryParams
+   * Object to be updated.
+   */
+  _updateQueryParams(newParams) {
+    const params = {...this._queryParams, ...newParams};
+    this._page(`${this._baseUrl()}?${qs.stringify(params)}`);
+  }
+
+  /**
+   * Get the current URL of the page, without query params. Useful for
+   * test stubbing.
+   *
+   * @return {string} the URL of the list page, without params.
+   */
+  _baseUrl() {
+    return window.location.pathname;
+  }
+}
+
+customElements.define('mr-show-columns-dropdown', MrShowColumnsDropdown);
diff --git a/static_src/elements/framework/mr-issue-list/mr-show-columns-dropdown.test.js b/static_src/elements/framework/mr-issue-list/mr-show-columns-dropdown.test.js
new file mode 100644
index 0000000..495ffe2
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-list/mr-show-columns-dropdown.test.js
@@ -0,0 +1,209 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrShowColumnsDropdown} from './mr-show-columns-dropdown.js';
+
+/** @type {MrShowColumnsDropdown} */
+let element;
+
+describe('mr-show-columns-dropdown', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-show-columns-dropdown');
+    document.body.appendChild(element);
+
+    sinon.stub(element, '_baseUrl').returns('/p/chromium/issues/list');
+    sinon.stub(element, '_page');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrShowColumnsDropdown);
+  });
+
+  it('displaying columns (spa)', async () => {
+    element.defaultFields = ['ID', 'Summary', 'AllLabels'];
+    element.columns = ['ID'];
+    element.issues = [
+      {approvalValues: [{fieldRef: {fieldName: 'Approval-Name'}}]},
+      {fieldValues: [
+        {phaseRef: {phaseName: 'Phase'}, fieldRef: {fieldName: 'Field-Name'}},
+        {fieldRef: {fieldName: 'Field-Name'}},
+      ]},
+      {labelRefs: [{label: 'Label-Name'}]},
+    ];
+
+    await element.updateComplete;
+
+    const actual =
+        element.items.map((item) => ({icon: item.icon, text: item.text}));
+    const expected = [
+      {icon: 'check', text: 'ID'},
+      {icon: '', text: 'AllLabels'},
+      {icon: '', text: 'Approval-Name'},
+      {icon: '', text: 'Approval-Name-Approver'},
+      {icon: '', text: 'Field-Name'},
+      {icon: '', text: 'Label'},
+      {icon: '', text: 'Phase.Field-Name'},
+      {icon: '', text: 'Summary'},
+    ];
+    assert.deepEqual(actual, expected);
+  });
+
+  describe('displaying columns (ezt)', () => {
+    it('sorts default column options', async () => {
+      element.defaultFields = ['ID', 'Summary', 'AllLabels'];
+      element.columns = [];
+      element._labelPrefixFields = [];
+
+      // Re-compute menu items on update.
+      await element.updateComplete;
+      const options = element.items;
+
+      assert.equal(options.length, 3);
+
+      assert.equal(options[0].text.trim(), 'AllLabels');
+      assert.equal(options[0].icon, '');
+
+      assert.equal(options[1].text.trim(), 'ID');
+      assert.equal(options[1].icon, '');
+
+      assert.equal(options[2].text.trim(), 'Summary');
+      assert.equal(options[2].icon, '');
+    });
+
+    it('sorts selected columns above unselected columns', async () => {
+      element.defaultFields = ['ID', 'Summary', 'AllLabels'];
+      element.columns = ['ID'];
+      element._labelPrefixFields = [];
+
+      // Re-compute menu items on update.
+      await element.updateComplete;
+      const options = element.items;
+
+      assert.equal(options.length, 3);
+
+      assert.equal(options[0].text.trim(), 'ID');
+      assert.equal(options[0].icon, 'check');
+
+      assert.equal(options[1].text.trim(), 'AllLabels');
+      assert.equal(options[1].icon, '');
+
+      assert.equal(options[2].text.trim(), 'Summary');
+      assert.equal(options[2].icon, '');
+    });
+
+    it('sorts field defs and label prefix column options', async () => {
+      element.defaultFields = ['ID', 'Summary'];
+      element.columns = [];
+      element._fieldDefs = [
+        {fieldRef: {fieldName: 'HelloWorld'}},
+        {fieldRef: {fieldName: 'TestField'}},
+      ];
+
+      element._labelPrefixFields = ['Milestone', 'Priority'];
+
+      // Re-compute menu items on update.
+      await element.updateComplete;
+      const options = element.items;
+
+      assert.equal(options.length, 6);
+      assert.equal(options[0].text.trim(), 'HelloWorld');
+      assert.equal(options[0].icon, '');
+
+      assert.equal(options[1].text.trim(), 'ID');
+      assert.equal(options[1].icon, '');
+
+      assert.equal(options[2].text.trim(), 'Milestone');
+      assert.equal(options[2].icon, '');
+
+      assert.equal(options[3].text.trim(), 'Priority');
+      assert.equal(options[3].icon, '');
+
+      assert.equal(options[4].text.trim(), 'Summary');
+      assert.equal(options[4].icon, '');
+
+      assert.equal(options[5].text.trim(), 'TestField');
+      assert.equal(options[5].icon, '');
+    });
+
+    it('add approver fields for approval type fields', async () => {
+      element.defaultFields = [];
+      element.columns = [];
+      element._fieldDefs = [
+        {fieldRef: {fieldName: 'HelloWorld', type: 'APPROVAL_TYPE'}},
+      ];
+      element._labelPrefixFields = [];
+
+      // Re-compute menu items on update.
+      await element.updateComplete;
+      const options = element.items;
+
+      assert.equal(options.length, 2);
+      assert.equal(options[0].text.trim(), 'HelloWorld');
+      assert.equal(options[0].icon, '');
+
+      assert.equal(options[1].text.trim(), 'HelloWorld-Approver');
+      assert.equal(options[1].icon, '');
+    });
+
+    it('phase field columns are correctly named', async () => {
+      element.defaultFields = [];
+      element.columns = [];
+      element._fieldDefs = [
+        {fieldRef: {fieldName: 'Number', type: 'INT_TYPE'}, isPhaseField: true},
+        {fieldRef: {fieldName: 'Speak', type: 'STR_TYPE'}, isPhaseField: true},
+      ];
+      element._labelPrefixFields = [];
+      element.phaseNames = ['cow', 'chicken'];
+
+      // Re-compute menu items on update.
+      await element.updateComplete;
+      const options = element.items;
+
+      assert.equal(options.length, 4);
+      assert.equal(options[0].text.trim(), 'chicken.Number');
+      assert.equal(options[0].icon, '');
+
+      assert.equal(options[1].text.trim(), 'chicken.Speak');
+      assert.equal(options[1].icon, '');
+
+      assert.equal(options[2].text.trim(), 'cow.Number');
+      assert.equal(options[2].icon, '');
+
+      assert.equal(options[3].text.trim(), 'cow.Speak');
+      assert.equal(options[3].icon, '');
+    });
+  });
+
+  describe('modifying columns', () => {
+    it('clicking unset column adds a column', async () => {
+      element.columns = ['ID', 'Summary'];
+      element.defaultFields = ['ID', 'Summary', 'AllLabels'];
+      element.queryParams = {};
+
+      await element.updateComplete;
+      element.clickItem(2);
+
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?colspec=ID%20Summary%20AllLabels');
+    });
+
+    it('clicking set column removes a column', async () => {
+      element.columns = ['ID', 'Summary'];
+      element.defaultFields = ['ID', 'Summary', 'AllLabels'];
+      element.queryParams = {};
+
+      await element.updateComplete;
+      element.clickItem(0);
+
+      sinon.assert.calledWith(element._page,
+          '/p/chromium/issues/list?colspec=Summary');
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-issue-slo/mr-issue-slo.js b/static_src/elements/framework/mr-issue-slo/mr-issue-slo.js
new file mode 100644
index 0000000..5a3e42c
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-slo/mr-issue-slo.js
@@ -0,0 +1,59 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+import {determineSloStatus} from './slo-rules.js';
+
+/** @typedef {import('./slo-rules.js').SloStatus} SloStatus */
+
+/**
+ * `<mr-issue-slo>`
+ *
+ * A widget for showing the given issue's SLO status.
+ */
+export class MrIssueSlo extends LitElement {
+  /** @override */
+  static get styles() {
+    return css``;
+  }
+
+  /** @override */
+  render() {
+    const sloStatus = this._determineSloStatus();
+    if (!sloStatus) {
+      return html`N/A`;
+    }
+    if (!sloStatus.target) {
+      return html`Done`;
+    }
+    return html`
+      <chops-timestamp .timestamp=${sloStatus.target} short></chops-timestamp>`;
+  }
+
+  /**
+   * Wrapper around slo-rules.js determineSloStatus to allow tests to override
+   * the return value.
+   * @private
+   * @return {SloStatus}
+   */
+  _determineSloStatus() {
+    return this.issue ? determineSloStatus(this.issue) : null;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issue: {type: Object},
+    };
+  }
+  /** @override */
+  constructor() {
+    super();
+    /** @type {Issue} */
+    this.issue;
+  }
+}
+customElements.define('mr-issue-slo', MrIssueSlo);
diff --git a/static_src/elements/framework/mr-issue-slo/mr-issue-slo.test.js b/static_src/elements/framework/mr-issue-slo/mr-issue-slo.test.js
new file mode 100644
index 0000000..28d23eb
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-slo/mr-issue-slo.test.js
@@ -0,0 +1,54 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueSlo} from './mr-issue-slo.js';
+
+
+let element;
+
+describe('mr-issue-slo', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-slo');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueSlo);
+  });
+
+  it('handles ineligible issues', async () => {
+    element._determineSloStatus = () => {
+      return null;
+    };
+    element.issue = {};
+    await element.updateComplete;
+    assert.equal(element.shadowRoot.textContent, 'N/A');
+  });
+
+  it('handles issues that have completed the SLO criteria', async () => {
+    element._determineSloStatus = () => {
+      return {target: null};
+    };
+    element.issue = {};
+    await element.updateComplete;
+    assert.equal(element.shadowRoot.textContent, 'Done');
+  });
+
+  it('handles issues that have not completed the SLO criteria', async () => {
+    element._determineSloStatus = () => {
+      return {target: 1234};
+    };
+    element.issue = {};
+    await element.updateComplete;
+    const timestampElement =
+        element.shadowRoot.querySelector('chops-timestamp');
+
+    assert.equal(timestampElement.timestamp, 1234);
+  });
+});
diff --git a/static_src/elements/framework/mr-issue-slo/slo-rules.js b/static_src/elements/framework/mr-issue-slo/slo-rules.js
new file mode 100644
index 0000000..e351ae0
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-slo/slo-rules.js
@@ -0,0 +1,195 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Determining Issues' statuses relative to SLO rules.
+ *
+ * See go/monorail-slo-v0 for more info.
+ */
+
+/**
+ * A rule determining the compliance of an issue with regard to an SLO.
+ * @typedef {Object} SloRule
+ * @property {function(Issue): SloStatus} statusFunction
+ */
+
+/**
+ * Potential statuses of an issue relative to an SLO's completion criteria.
+ * @enum {string}
+ */
+export const SloCompletionStatus = {
+  /** The completion criteria for the SloRule have not been satisfied. */
+  INCOMPLETE: 'INCOMPLETE',
+  /** The completion criteria for the SloRule have been satisfied. */
+  COMPLETE: 'COMPLETE',
+};
+
+/**
+ * The status of an issue with regard to an SloRule.
+ * @typedef {Object} SloStatus
+ * @property {SloRule} rule The rule that generated this status.
+ * @property {Date} target The time the Issue must move to completion, or null
+ *     if the issue has already moved to completion.
+ * @property {SloCompletionStatus} completion Issue's completion status.
+ */
+
+/**
+ * Chrome OS Software's SLO for issue closure (go/chromeos-software-bug-slos).
+ *
+ * Implementation based on the queries defined in Sheriffbot
+ * https://chrome-internal.googlesource.com/infra/infra_internal/+/refs/heads/main/appengine/sheriffbot/src/sheriffbot/bug_slo_daily_queries.py
+ *
+ * @const {SloRule}
+ * @private Only visible for testing.
+ */
+export const _CROS_CLOSURE_SLO = {
+  statusFunction: (issue) => {
+    if (!_isCrosClosureEligible(issue)) {
+      return null;
+    }
+
+    const pri = getPriFromIssue(issue);
+    const daysToClose = _CROS_CLOSURE_SLO_DAYS_BY_PRIORITY[pri];
+
+    if (!daysToClose) {
+      // No applicable SLO found issues with this priority.
+      return null;
+    }
+    // Return a complete status for closed issues.
+    if (issue.statusRef && !issue.statusRef.meansOpen) {
+      return {
+        rule: _CROS_CLOSURE_SLO,
+        target: null,
+        completion: SloCompletionStatus.COMPLETE};
+    }
+
+    // Set the target based on the opening and the daysToClose.
+    const target = new Date(issue.openedTimestamp * 1000);
+    target.setDate(target.getDate() + daysToClose);
+    return {
+      rule: _CROS_CLOSURE_SLO,
+      target: target,
+      completion: SloCompletionStatus.INCOMPLETE};
+  },
+};
+
+/**
+ * @param {Issue} issue
+ * @return {string?} the pri's value, if found.
+ */
+const getPriFromIssue = (issue) => {
+  for (const fv of issue.fieldValues) {
+    if (fv.fieldRef.fieldName === 'Pri') {
+      return fv.value;
+    }
+  }
+};
+
+/**
+ * The number of days (since the issue was opened) allowed for it to be fixed.
+ * @private Only visible for testing.
+ */
+export const _CROS_CLOSURE_SLO_DAYS_BY_PRIORITY = Object.freeze({
+  '1': 42,
+});
+
+// https://chrome-internal.googlesource.com/infra/infra_internal/+/refs/heads/main/appengine/sheriffbot/src/sheriffbot/bug_slo_daily_queries.py#97
+const CROS_ELIGIBLE_COMPONENT_PATHS = new Set([
+  'OS>Systems>CrashReporting',
+  'OS>Systems>Displays',
+  'OS>Systems>Feedback',
+  'OS>Systems>HaTS',
+  'OS>Systems>Input',
+  'OS>Systems>Input>Keyboard',
+  'OS>Systems>Input>Mouse',
+  'OS>Systems>Input>Shortcuts',
+  'OS>Systems>Input>Touch',
+  'OS>Systems>Metrics',
+  'OS>Systems>Multidevice',
+  'OS>Systems>Multidevice>Messages',
+  'OS>Systems>Multidevice>SmartLock',
+  'OS>Systems>Multidevice>Tethering',
+  'OS>Systems>Network>Bluetooth',
+  'OS>Systems>Network>Cellular',
+  'OS>Systems>Network>VPN',
+  'OS>Systems>Network>WiFi',
+  'OS>Systems>Printing',
+  'OS>Systems>Settings',
+  'OS>Systems>Spellcheck',
+  'OS>Systems>Update',
+  'OS>Systems>Wallpaper',
+  'OS>Systems>WirelessCharging',
+  'Platform>Apps>Feedback',
+  'UI>Shell>Networking',
+]);
+
+/**
+ * Determines if an issue is eligible for _CROS_CLOSURE_SLO.
+ * @param {Issue} issue
+ * @return {boolean}
+ * @private Only visible for testing.
+ */
+export const _isCrosClosureEligible = (issue) => {
+  // If at least one component applies, continue.
+  const hasEligibleComponent = issue.componentRefs.some(
+      (component) => CROS_ELIGIBLE_COMPONENT_PATHS.has(component.path));
+  if (!hasEligibleComponent) {
+    return false;
+  }
+
+  let priority = null;
+  let hasMilestone = false;
+  for (const fv of issue.fieldValues) {
+    if (fv.fieldRef.fieldName === 'Type') {
+      // These types don't apply.
+      if (fv.value === 'Feature' || fv.value === 'FLT-Launch' ||
+      fv.value === 'Postmortem-Followup' || fv.value === 'Design-Review') {
+        return false;
+      }
+    }
+    if (fv.fieldRef.fieldName === 'Pri') {
+      priority = fv.value;
+    }
+    if (fv.fieldRef.fieldName === 'M') {
+      hasMilestone = true;
+    }
+  }
+  // P1 issues with milestones don't apply.
+  if (priority === '1' && hasMilestone) {
+    return false;
+  }
+  // Issues with the ChromeOS_No_SLO label don't apply.
+  for (const labelRef of issue.labelRefs) {
+    if (labelRef.label === 'ChromeOS_No_SLO') {
+      return false;
+    }
+  }
+  return true;
+};
+
+/**
+ * Active SLO Rules.
+ * @const {Array<SloRule>}
+ */
+const SLO_RULES = [_CROS_CLOSURE_SLO];
+
+/**
+ * Determines the SloStatus for the given issue.
+ * @param {Issue} issue The issue to check.
+ * @return {SloStatus} The status of the issue, or null if no rules apply.
+ */
+export const determineSloStatus = (issue) => {
+  try {
+    for (const rule of SLO_RULES) {
+      const status = rule.statusFunction(issue);
+      if (status) {
+        return status;
+      }
+    }
+  } catch (error) {
+    // Don't bubble up any errors in SLO_RULES functions, which might sometimes
+    // be written/updated by client teams.
+  }
+  return null;
+};
diff --git a/static_src/elements/framework/mr-issue-slo/slo-rules.test.js b/static_src/elements/framework/mr-issue-slo/slo-rules.test.js
new file mode 100644
index 0000000..a48e5e2
--- /dev/null
+++ b/static_src/elements/framework/mr-issue-slo/slo-rules.test.js
@@ -0,0 +1,152 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {_CROS_CLOSURE_SLO, _CROS_CLOSURE_SLO_DAYS_BY_PRIORITY,
+  _isCrosClosureEligible, SloCompletionStatus, determineSloStatus}
+  from './slo-rules.js';
+
+const P1_FIELD_VALUE = Object.freeze({
+  fieldRef: {
+    fieldId: 1,
+    fieldName: 'Pri',
+    type: 'ENUM_TYPE',
+  },
+  value: '1'});
+
+// TODO(crbug.com/monorail/7843): Separate testing of determineSloStatus from
+// testing of specific SLO Rules. Add testing for a rule that throws an error.
+describe('determineSloStatus', () => {
+  it('returns null for ineligible issues', () => {
+    const ineligibleIssue = {
+      componentRefs: [{path: 'Some>Other>Component'}],
+      fieldValues: [P1_FIELD_VALUE],
+      labelRefs: [],
+      localId: 1,
+      projectName: 'x',
+    };
+    assert.isNull(determineSloStatus(ineligibleIssue));
+  });
+
+  it('returns null for eligible issues without defined priority', () => {
+    const ineligibleIssue = {
+      componentRefs: [{path: 'OS>Systems>CrashReporting'}],
+      fieldValues: [],
+      labelRefs: [],
+      localId: 1,
+      projectName: 'x',
+    };
+    assert.isNull(determineSloStatus(ineligibleIssue));
+  });
+
+  it('returns SloStatus with target for incomplete eligible issues', () => {
+    const openedTimestamp = 1412362587;
+    const eligibleIssue = {
+      componentRefs: [{path: 'OS>Systems>CrashReporting'}],
+      fieldValues: [P1_FIELD_VALUE],
+      labelRefs: [],
+      localId: 1,
+      openedTimestamp: openedTimestamp,
+      projectName: 'x',
+    };
+    const status = determineSloStatus(eligibleIssue);
+
+    const expectedTarget = new Date(openedTimestamp * 1000);
+    expectedTarget.setDate(
+        expectedTarget.getDate() + _CROS_CLOSURE_SLO_DAYS_BY_PRIORITY['1']);
+
+    assert.equal(status.target.valueOf(), expectedTarget.valueOf());
+    assert.equal(status.completion, SloCompletionStatus.INCOMPLETE);
+    assert.equal(status.rule, _CROS_CLOSURE_SLO);
+  });
+
+  it('returns SloStatus without target for complete eligible issues', () => {
+    const eligibleIssue = {
+      componentRefs: [{path: 'OS>Systems>CrashReporting'}],
+      fieldValues: [P1_FIELD_VALUE],
+      labelRefs: [],
+      localId: 1,
+      projectName: 'x',
+      statusRef: {status: 'Closed', meansOpen: false},
+    };
+    const status = determineSloStatus(eligibleIssue);
+    assert.isNull(status.target);
+    assert.equal(status.completion, SloCompletionStatus.COMPLETE);
+    assert.equal(status.rule, _CROS_CLOSURE_SLO);
+  });
+});
+
+describe('_isCrosClosureEligible', () => {
+  let crosIssue;
+  beforeEach(() => {
+    crosIssue = {
+      componentRefs: [{path: 'OS>Systems>CrashReporting'}],
+      fieldValues: [],
+      labelRefs: [],
+      localId: 1,
+      projectName: 'x',
+    };
+  });
+
+  it('returns true when eligible', () => {
+    assert.isTrue(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns true if at least one eligible component', () => {
+    crosIssue.componentRefs.push({path: 'Some>Other>Component'});
+    assert.isTrue(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for issues in wrong component', () => {
+    crosIssue.componentRefs = [{path: 'Some>Other>Component'}];
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for Feature', () => {
+    crosIssue.fieldValues.push(
+        {fieldRef: {fieldName: 'Type'}, value: 'Feature'});
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for FLT-Launch', () => {
+    crosIssue.fieldValues.push(
+        {fieldRef: {fieldName: 'Type'}, value: 'FLT-Launch'});
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for Postmortem-Followup', () => {
+    crosIssue.fieldValues.push(
+        {fieldRef: {fieldName: 'Type'}, value: 'Postmortem-Followup'});
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for Design-Review', () => {
+    crosIssue.fieldValues.push(
+        {fieldRef: {fieldName: 'Type'}, value: 'Design-Review'});
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns true for other types', () => {
+    crosIssue.fieldValues.push(
+        {fieldRef: {fieldName: 'type'}, value: 'Any-Other-Type'});
+    assert.isTrue(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for p1 with milestone', () => {
+    crosIssue.fieldValues.push(P1_FIELD_VALUE);
+    crosIssue.fieldValues.push({fieldRef: {fieldName: 'M'}, value: 'any'});
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns true for p1 without milestone', () => {
+    crosIssue.fieldValues.push(P1_FIELD_VALUE);
+    crosIssue.fieldValues.push({fieldRef: {fieldName: 'Other'}, value: 'any'});
+    assert.isTrue(_isCrosClosureEligible(crosIssue));
+  });
+
+  it('returns false for ChromeOS_No_SLO label', () => {
+    crosIssue.labelRefs.push({label: 'ChromeOS_No_SLO'});
+    assert.isFalse(_isCrosClosureEligible(crosIssue));
+  });
+});
diff --git a/static_src/elements/framework/mr-keystrokes/mr-keystrokes.js b/static_src/elements/framework/mr-keystrokes/mr-keystrokes.js
new file mode 100644
index 0000000..9e932d6
--- /dev/null
+++ b/static_src/elements/framework/mr-keystrokes/mr-keystrokes.js
@@ -0,0 +1,421 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import page from 'page';
+import qs from 'qs';
+import Mousetrap from 'mousetrap';
+
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {issueRefToString} from 'shared/convertersV0.js';
+
+
+const SHORTCUT_DOC_GROUPS = [
+  {
+    title: 'Issue list',
+    keyDocs: [
+      {
+        keys: ['k', 'j'],
+        tip: 'up/down in the list',
+      },
+      {
+        keys: ['o', 'Enter'],
+        tip: 'open the current issue',
+      },
+      {
+        keys: ['Shift-O'],
+        tip: 'open issue in new tab',
+      },
+      {
+        keys: ['x'],
+        tip: 'select the current issue',
+      },
+    ],
+  },
+  {
+    title: 'Issue details',
+    keyDocs: [
+      {
+        keys: ['k', 'j'],
+        tip: 'prev/next issue in list',
+      },
+      {
+        keys: ['u'],
+        tip: 'up to issue list',
+      },
+      {
+        keys: ['r'],
+        tip: 'reply to current issue',
+      },
+      {
+        keys: ['Ctrl+Enter', '\u2318+Enter'],
+        tip: 'save issue reply (submit issue on issue filing page)',
+      },
+    ],
+  },
+  {
+    title: 'Anywhere',
+    keyDocs: [
+      {
+        keys: ['/'],
+        tip: 'focus on the issue search field',
+      },
+      {
+        keys: ['c'],
+        tip: 'compose a new issue',
+      },
+      {
+        keys: ['s'],
+        tip: 'star the current issue',
+      },
+      {
+        keys: ['?'],
+        tip: 'show this help dialog',
+      },
+    ],
+  },
+];
+
+/**
+ * `<mr-keystrokes>`
+ *
+ * Adds keybindings for Monorail, including a dialog for showing keystrokes.
+ * @extends {LitElement}
+ */
+export class MrKeystrokes extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return css`
+      h2 {
+        margin-top: 0;
+        display: flex;
+        justify-content: space-between;
+        font-weight: normal;
+        border-bottom: 2px solid white;
+        font-size: var(--chops-large-font-size);
+        padding-bottom: 0.5em;
+      }
+      .close-button {
+        border: 0;
+        background: 0;
+        text-decoration: underline;
+        cursor: pointer;
+      }
+      .keyboard-help {
+        display: flex;
+        align-items: flex-start;
+        justify-content: space-around;
+        flex-direction: row;
+        border-bottom: 2px solid white;
+        flex-wrap: wrap;
+      }
+      .keyboard-help-section {
+        width: 32%;
+        display: grid;
+        grid-template-columns: 40% 60%;
+        padding-bottom: 1em;
+        grid-gap: 4px;
+        min-width: 300px;
+      }
+      .help-title {
+        font-weight: bold;
+      }
+      .key-shortcut {
+        text-align: right;
+        padding-right: 8px;
+        font-weight: bold;
+        margin: 2px;
+      }
+      kbd {
+        background: var(--chops-gray-200);
+        padding: 2px 8px;
+        border-radius: 2px;
+        min-width: 28px;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <chops-dialog ?opened=${this._opened}>
+        <h2>
+          Issue tracker keyboard shortcuts
+          <button class="close-button" @click=${this._closeDialog}>
+            Close
+          </button>
+        </h2>
+        <div class="keyboard-help">
+          ${this._shortcutDocGroups.map((group) => html`
+            <div class="keyboard-help-section">
+              <span></span><span class="help-title">${group.title}</span>
+              ${group.keyDocs.map((keyDoc) => html`
+                <span class="key-shortcut">
+                  ${keyDoc.keys.map((key, i) => html`
+                    <kbd>${key}</kbd>
+                    <span
+                      class="key-separator"
+                      ?hidden=${i === keyDoc.keys.length - 1}
+                    > / </span>
+                  `)}:
+                </span>
+                <span class="key-tip">${keyDoc.tip}</span>
+              `)}
+            </div>
+          `)}
+        </div>
+        <p>
+          Note: Only signed in users can star issues or add comments, and
+          only project members can select issues for bulk edits.
+        </p>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issueEntryUrl: {type: String},
+      issueId: {type: Number},
+      _projectName: {type: String},
+      queryParams: {type: Object},
+      _fetchingIsStarred: {type: Boolean},
+      _isStarred: {type: Boolean},
+      _issuePermissions: {type: Array},
+      _opened: {type: Boolean},
+      _shortcutDocGroups: {type: Array},
+      _starringIssues: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this._shortcutDocGroups = SHORTCUT_DOC_GROUPS;
+    this._opened = false;
+    this._starringIssues = new Map();
+    this._projectName = undefined;
+    this._issuePermissions = [];
+    this.issueId = undefined;
+    this.queryParams = undefined;
+    this.issueEntryUrl = undefined;
+
+    this._page = page;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._projectName = projectV0.viewedProjectName(state);
+    this._issuePermissions = issueV0.permissions(state);
+
+    const starredIssues = issueV0.starredIssues(state);
+    this._isStarred = starredIssues.has(issueRefToString(this._issueRef));
+    this._fetchingIsStarred = issueV0.requests(state).fetchIsStarred.requesting;
+    this._starringIssues = issueV0.starringIssues(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('_projectName') ||
+        changedProperties.has('issueEntryUrl')) {
+      this._bindProjectKeys(this._projectName, this.issueEntryUrl);
+    }
+    if (changedProperties.has('_projectName') ||
+        changedProperties.has('issueId') ||
+        changedProperties.has('_issuePermissions') ||
+        changedProperties.has('queryParams')) {
+      this._bindIssueDetailKeys(this._projectName, this.issueId,
+          this._issuePermissions, this.queryParams);
+    }
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+    this._unbindProjectKeys();
+    this._unbindIssueDetailKeys();
+  }
+
+  /** @private */
+  get _isStarring() {
+    const requestKey = issueRefToString(this._issueRef);
+    if (this._starringIssues.has(requestKey)) {
+      return this._starringIssues.get(requestKey).requesting;
+    }
+    return false;
+  }
+
+  /** @private */
+  get _issueRef() {
+    return {
+      projectName: this._projectName,
+      localId: this.issueId,
+    };
+  }
+
+  /** @private */
+  _toggleDialog() {
+    this._opened = !this._opened;
+  }
+
+  /** @private */
+  _openDialog() {
+    this._opened = true;
+  }
+
+  /** @private */
+  _closeDialog() {
+    this._opened = false;
+  }
+
+  /**
+   * @param {string} projectName
+   * @param {string} issueEntryUrl
+   * @fires CustomEvent#focus-search
+   * @private
+   */
+  _bindProjectKeys(projectName, issueEntryUrl) {
+    this._unbindProjectKeys();
+
+    if (!projectName) return;
+
+    issueEntryUrl = issueEntryUrl || `/p/${projectName}/issues/entry`;
+
+    Mousetrap.bind('/', (e) => {
+      e.preventDefault();
+      // Focus search.
+      this.dispatchEvent(new CustomEvent('focus-search',
+          {composed: true, bubbles: true}));
+    });
+
+    Mousetrap.bind('?', () => {
+      // Toggle key help.
+      this._toggleDialog();
+    });
+
+    Mousetrap.bind('esc', () => {
+      // Close key help dialog if open.
+      this._closeDialog();
+    });
+
+    Mousetrap.bind('c', () => this._page(issueEntryUrl));
+  }
+
+  /** @private */
+  _unbindProjectKeys() {
+    Mousetrap.unbind('/');
+    Mousetrap.unbind('?');
+    Mousetrap.unbind('esc');
+    Mousetrap.unbind('c');
+  }
+
+  /**
+   * @param {string} projectName
+   * @param {string} issueId
+   * @param {Array<string>} issuePermissions
+   * @param {Object} queryParams
+   * @private
+   */
+  _bindIssueDetailKeys(projectName, issueId, issuePermissions, queryParams) {
+    this._unbindIssueDetailKeys();
+
+    if (!projectName || !issueId) return;
+
+    const projectHomeUrl = `/p/${projectName}`;
+
+    const queryString = qs.stringify(queryParams);
+
+    // TODO(zhangtiff): Update these links when mr-flipper's async request
+    // finishes.
+    const prevUrl = `${projectHomeUrl}/issues/detail/previous?${queryString}`;
+    const nextUrl = `${projectHomeUrl}/issues/detail/next?${queryString}`;
+    const canComment = issuePermissions.includes('addissuecomment');
+    const canStar = issuePermissions.includes('setstar');
+
+    // Previous issue in list.
+    Mousetrap.bind('k', () => this._page(prevUrl));
+
+    // Next issue in list.
+    Mousetrap.bind('j', () => this._page(nextUrl));
+
+    // Back to list.
+    Mousetrap.bind('u', () => this._backToList());
+
+    if (canComment) {
+      // Navigate to the form to make changes.
+      Mousetrap.bind('r', () => this._jumpToEditForm());
+    }
+
+    if (canStar) {
+      Mousetrap.bind('s', () => this._starIssue());
+    }
+  }
+
+  /**
+   * Navigates back to the issue list page.
+   * @private
+   */
+  _backToList() {
+    const params = {...this.queryParams,
+      cursor: issueRefToString(this._issueRef)};
+    const queryString = qs.stringify(params);
+    if (params['hotlist_id']) {
+      // Because hotlist URLs require a server look up to be built from a
+      // hotlist ID, we have to route the request through an extra endpoint
+      // that redirects to the appropriate hotlist.
+      const listUrl = `/p/${this._projectName}/issues/detail/list?${
+        queryString}`;
+      this._page(listUrl);
+
+      // TODO(crbug.com/monorail/6341): Switch to using the new hotlist URL once
+      // hotlists have migrated.
+      // this._page(`/hotlists/${params['hotlist_id']}`);
+    } else {
+      delete params.id;
+      const listUrl = `/p/${this._projectName}/issues/list?${queryString}`;
+      this._page(listUrl);
+    }
+  }
+
+  /**
+   * Scrolls the user to the issue editing form when they press
+   * the 'r' key.
+   * @private
+   */
+  _jumpToEditForm() {
+    // Force a hash change even the hash is already makechanges.
+    if (window.location.hash.toLowerCase() === '#makechanges') {
+      window.location.hash = ' ';
+    }
+    window.location.hash = '#makechanges';
+  }
+
+  /**
+   * Stars the current issue the user is viewing on the issue detail page.
+   * @private
+   */
+  _starIssue() {
+    if (!this._fetchingIsStarred && !this._isStarring) {
+      const newIsStarred = !this._isStarred;
+
+      store.dispatch(issueV0.star(this._issueRef, newIsStarred));
+    }
+  }
+
+
+  /** @private */
+  _unbindIssueDetailKeys() {
+    Mousetrap.unbind('k');
+    Mousetrap.unbind('j');
+    Mousetrap.unbind('u');
+    Mousetrap.unbind('r');
+    Mousetrap.unbind('s');
+  }
+}
+
+customElements.define('mr-keystrokes', MrKeystrokes);
diff --git a/static_src/elements/framework/mr-keystrokes/mr-keystrokes.test.js b/static_src/elements/framework/mr-keystrokes/mr-keystrokes.test.js
new file mode 100644
index 0000000..0d7468f
--- /dev/null
+++ b/static_src/elements/framework/mr-keystrokes/mr-keystrokes.test.js
@@ -0,0 +1,194 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrKeystrokes} from './mr-keystrokes.js';
+import Mousetrap from 'mousetrap';
+
+import {issueRefToString} from 'shared/convertersV0.js';
+
+/** @type {MrKeystrokes} */
+let element;
+
+describe('mr-keystrokes', () => {
+  beforeEach(() => {
+    element = /** @type {MrKeystrokes} */ (
+      document.createElement('mr-keystrokes'));
+    document.body.appendChild(element);
+
+    element._projectName = 'proj';
+    element.issueId = 11;
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrKeystrokes);
+  });
+
+  it('tracks if the issue is currently starring', async () => {
+    await element.updateComplete;
+    assert.isFalse(element._isStarring);
+
+    const issueRefStr = issueRefToString(element._issueRef);
+    element._starringIssues.set(issueRefStr, {requesting: true});
+    assert.isTrue(element._isStarring);
+  });
+
+  it('? and esc open and close dialog', async () => {
+    await element.updateComplete;
+    assert.isFalse(element._opened);
+
+    Mousetrap.trigger('?');
+
+    await element.updateComplete;
+    assert.isTrue(element._opened);
+
+    Mousetrap.trigger('esc');
+
+    await element.updateComplete;
+    assert.isFalse(element._opened);
+  });
+
+  describe('issue detail keys', () => {
+    beforeEach(() => {
+      sinon.stub(element, '_page');
+      sinon.stub(element, '_jumpToEditForm');
+      sinon.stub(element, '_starIssue');
+    });
+
+    it('not bound when _projectName not set', async () => {
+      element._projectName = '';
+      element.issueId = 1;
+
+      await element.updateComplete;
+
+      // Navigation hot keys.
+      Mousetrap.trigger('k');
+      Mousetrap.trigger('j');
+      Mousetrap.trigger('u');
+      sinon.assert.notCalled(element._page);
+
+      // Jump to edit form hot key.
+      Mousetrap.trigger('r');
+      sinon.assert.notCalled(element._jumpToEditForm);
+
+      // Star issue hotkey.
+      Mousetrap.trigger('s');
+      sinon.assert.notCalled(element._starIssue);
+    });
+
+    it('not bound when issueId not set', async () => {
+      element._projectName = 'proj';
+      element.issueId = 0;
+
+      await element.updateComplete;
+
+      // Navigation hot keys.
+      Mousetrap.trigger('k');
+      Mousetrap.trigger('j');
+      Mousetrap.trigger('u');
+      sinon.assert.notCalled(element._page);
+
+      // Jump to edit form hot key.
+      Mousetrap.trigger('r');
+      sinon.assert.notCalled(element._jumpToEditForm);
+
+      // Star issue hotkey.
+      Mousetrap.trigger('s');
+      sinon.assert.notCalled(element._starIssue);
+    });
+
+    it('binds j and k navigation hot keys', async () => {
+      element.queryParams = {q: 'something'};
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('k');
+      sinon.assert.calledWith(element._page,
+          '/p/proj/issues/detail/previous?q=something');
+
+      Mousetrap.trigger('j');
+      sinon.assert.calledWith(element._page,
+          '/p/proj/issues/detail/next?q=something');
+
+      Mousetrap.trigger('u');
+      sinon.assert.calledWith(element._page,
+          '/p/proj/issues/list?q=something&cursor=proj%3A11');
+    });
+
+    it('u key navigates back to issue list wth cursor set', async () => {
+      element.queryParams = {q: 'something'};
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('u');
+      sinon.assert.calledWith(element._page,
+          '/p/proj/issues/list?q=something&cursor=proj%3A11');
+    });
+
+    it('u key navigates back to hotlist when hotlist_id set', async () => {
+      element.queryParams = {hotlist_id: 1234};
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('u');
+      sinon.assert.calledWith(element._page,
+          '/p/proj/issues/detail/list?hotlist_id=1234&cursor=proj%3A11');
+    });
+
+    it('does not star when user does not have permission', async () => {
+      element.queryParams = {q: 'something'};
+      element._issuePermissions = [];
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('s');
+      sinon.assert.notCalled(element._starIssue);
+    });
+
+    it('does star when user has permission', async () => {
+      element.queryParams = {q: 'something'};
+      element._issuePermissions = ['setstar'];
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('s');
+      sinon.assert.calledOnce(element._starIssue);
+    });
+
+    it('does not star when user does not have permission', async () => {
+      element.queryParams = {q: 'something'};
+      element._issuePermissions = [];
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('s');
+      sinon.assert.notCalled(element._starIssue);
+    });
+
+    it('does not jump to edit form when user cannot comment', async () => {
+      element.queryParams = {q: 'something'};
+      element._issuePermissions = [];
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('r');
+      sinon.assert.notCalled(element._jumpToEditForm);
+    });
+
+    it('does jump to edit form when user can comment', async () => {
+      element.queryParams = {q: 'something'};
+      element._issuePermissions = ['addissuecomment'];
+
+      await element.updateComplete;
+
+      Mousetrap.trigger('r');
+      sinon.assert.calledOnce(element._jumpToEditForm);
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-pref-toggle/mr-pref-toggle.js b/static_src/elements/framework/mr-pref-toggle/mr-pref-toggle.js
new file mode 100644
index 0000000..a5f9d7a
--- /dev/null
+++ b/static_src/elements/framework/mr-pref-toggle/mr-pref-toggle.js
@@ -0,0 +1,94 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import {store, connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import 'elements/chops/chops-toggle/chops-toggle.js';
+import {logEvent} from 'monitoring/client-logger.js';
+
+/**
+ * `<mr-pref-toggle>`
+ *
+ * Toggle button for any user pref, including code font and
+ * rendering markdown.  For our purposes, pressing it causes
+ * issue description and comment text to switch either to
+ * monospace font or to render in markdown and the setting
+ * is saved in the user's preferences.
+ */
+export class MrPrefToggle extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+        <chops-toggle
+          ?checked=${this._checked}
+          ?disabled=${this._prefsInFlight}
+          @checked-change=${this._togglePref}
+          title=${this.title}
+        >${this.label}</chops-toggle>
+      `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      prefs: {type: Object},
+      userDisplayName: {type: String},
+      initialValue: {type: Boolean},
+      _prefsInFlight: {type: Boolean},
+      label: {type: String},
+      title: {type: String},
+      prefName: {type: String},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.prefs = userV0.prefs(state);
+    this._prefsInFlight = userV0.requests(state).fetchPrefs.requesting ||
+      userV0.requests(state).setPrefs.requesting;
+    this._projectName = projectV0.viewedProjectName(state);
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.initialValue = false;
+    this.userDisplayName = '';
+    this.label = '';
+    this.title = '';
+    this.prefName = '';
+    this._projectName = '';
+  }
+
+  // Used by the legacy EZT page to interact with Redux.
+  fetchPrefs() {
+    store.dispatch(userV0.fetchPrefs());
+  }
+
+  get _checked() {
+    const {prefs, initialValue} = this;
+    if (prefs && prefs.has(this.prefName)) return prefs.get(this.prefName);
+    return initialValue;
+  }
+
+  /**
+   * Toggles the code font in response to the user activating the button.
+   * @param {Event} e
+   * @fires CustomEvent#font-toggle
+   * @private
+   */
+  _togglePref(e) {
+    const checked = e.detail.checked;
+    this.dispatchEvent(new CustomEvent('font-toggle', {detail: {checked}}));
+
+    const newPrefs = [{name: this.prefName, value: '' + checked}];
+    store.dispatch(userV0.setPrefs(newPrefs, !!this.userDisplayName));
+
+    logEvent('mr-pref-toggle', `${this.prefName}: ${checked}`, this._projectName);
+  }
+}
+customElements.define('mr-pref-toggle', MrPrefToggle);
diff --git a/static_src/elements/framework/mr-pref-toggle/mr-pref-toggle.test.js b/static_src/elements/framework/mr-pref-toggle/mr-pref-toggle.test.js
new file mode 100644
index 0000000..b6dbb41
--- /dev/null
+++ b/static_src/elements/framework/mr-pref-toggle/mr-pref-toggle.test.js
@@ -0,0 +1,86 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'sinon';
+import {assert} from 'chai';
+import {MrPrefToggle} from './mr-pref-toggle.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+let element;
+
+describe('mr-pref-toggle', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-pref-toggle');
+    element.label = 'Code';
+    element.title = 'Code font';
+    element.prefName = 'code_font';
+    document.body.appendChild(element);
+    sinon.stub(prpcClient, 'call').returns(Promise.resolve({}));
+    window.ga = sinon.stub();
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    prpcClient.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrPrefToggle);
+  });
+
+  it('toggling does not save when user is not logged in', async () => {
+    element.userDisplayName = undefined;
+    element.prefs = new Map([]);
+
+    await element.updateComplete;
+
+    const chopsToggle = element.shadowRoot.querySelector('chops-toggle');
+    chopsToggle.click();
+    await element.updateComplete;
+
+    sinon.assert.notCalled(prpcClient.call);
+
+    assert.isTrue(element.prefs.get('code_font'));
+  });
+
+  it('toggling to true saves result', async () => {
+    element.userDisplayName = 'test@example.com';
+    element.prefs = new Map([['code_font', false]]);
+
+    await element.updateComplete;
+
+    const chopsToggle = element.shadowRoot.querySelector('chops-toggle');
+
+    chopsToggle.click(); // Toggle it on.
+    await element.updateComplete;
+
+    sinon.assert.calledWith(
+        prpcClient.call,
+        'monorail.Users',
+        'SetUserPrefs',
+        {prefs: [{name: 'code_font', value: 'true'}]});
+
+    assert.isTrue(element.prefs.get('code_font'));
+  });
+
+  it('toggling to false saves result', async () => {
+    element.userDisplayName = 'test@example.com';
+    element.prefs = new Map([['code_font', true]]);
+
+    await element.updateComplete;
+
+    const chopsToggle = element.shadowRoot.querySelector('chops-toggle');
+
+    chopsToggle.click(); // Toggle it off.
+    await element.updateComplete;
+
+    sinon.assert.calledWith(
+        prpcClient.call,
+        'monorail.Users',
+        'SetUserPrefs',
+        {prefs: [{name: 'code_font', value: 'false'}]});
+
+    assert.isFalse(element.prefs.get('code_font'));
+  });
+});
diff --git a/static_src/elements/framework/mr-site-banner/mr-site-banner.js b/static_src/elements/framework/mr-site-banner/mr-site-banner.js
new file mode 100644
index 0000000..2a98a5c
--- /dev/null
+++ b/static_src/elements/framework/mr-site-banner/mr-site-banner.js
@@ -0,0 +1,75 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+import {connectStore} from 'reducers/base.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+export class MrSiteBanner extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return css`
+      :host([hidden]) {
+        display: none;
+      }
+      :host {
+        display: block;
+        font-weight: bold;
+        color: var(--chops-field-error-color);
+        background: var(--chops-orange-50);
+        padding: 5px;
+        text-align: center;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      ${this.bannerMessage}
+      ${this.bannerTime ? html`
+        <chops-timestamp
+          .timestamp=${this.bannerTime}
+        ></chops-timestamp>
+      ` : ''}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      hidden: {
+        type: Boolean,
+        reflect: true,
+      },
+      bannerMessage: {type: String},
+      bannerTime: {type: Number},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.bannerMessage = '';
+    this.bannerTime = 0;
+    this.hidden = false;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.bannerMessage = sitewide.bannerMessage(state);
+    this.bannerTime = sitewide.bannerTime(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('bannerMessage')) {
+      this.hidden = !this.bannerMessage;
+    }
+  }
+}
+
+customElements.define('mr-site-banner', MrSiteBanner);
diff --git a/static_src/elements/framework/mr-site-banner/mr-site-banner.test.js b/static_src/elements/framework/mr-site-banner/mr-site-banner.test.js
new file mode 100644
index 0000000..527b942
--- /dev/null
+++ b/static_src/elements/framework/mr-site-banner/mr-site-banner.test.js
@@ -0,0 +1,56 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {FORMATTER}
+  from 'elements/chops/chops-timestamp/chops-timestamp-helpers.js';
+import {MrSiteBanner} from './mr-site-banner.js';
+
+
+let element;
+
+describe('mr-site-banner', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-site-banner');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrSiteBanner);
+  });
+
+  it('displays a banner message', async () => {
+    element.bannerMessage = 'Message';
+    await element.updateComplete;
+    assert.equal(element.shadowRoot.textContent.trim(), 'Message');
+    assert.isNull(element.shadowRoot.querySelector('chops-timestamp'));
+  });
+
+  it('displays the banner timestamp', async () => {
+    const timestamp = 1560450600;
+
+    element.bannerMessage = 'Message';
+    element.bannerTime = timestamp;
+    await element.updateComplete;
+
+    const chopsTimestamp = element.shadowRoot.querySelector('chops-timestamp');
+
+    // The formatted date strings differ based on time zone and browser, so we
+    // can't use static strings for testing. We can't stub out the format method
+    // because it's native code and can't be modified. So just use the FORMATTER
+    // object.
+    assert.include(
+        chopsTimestamp.shadowRoot.textContent,
+        FORMATTER.format(new Date(timestamp * 1000)));
+  });
+
+  it('hides when there is no banner message', async () => {
+    await element.updateComplete;
+    assert.isTrue(element.hidden);
+  });
+});
diff --git a/static_src/elements/framework/mr-star/mr-issue-star.js b/static_src/elements/framework/mr-star/mr-issue-star.js
new file mode 100644
index 0000000..5255820
--- /dev/null
+++ b/static_src/elements/framework/mr-star/mr-issue-star.js
@@ -0,0 +1,110 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {connectStore, store} from 'reducers/base.js';
+import * as users from 'reducers/users.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {issueRefToString} from 'shared/convertersV0.js';
+import {MrStar} from './mr-star.js';
+
+
+/**
+ * `<mr-issue-star>`
+ *
+ * A button for starring an issue.
+ *
+ */
+export class MrIssueStar extends connectStore(MrStar) {
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * A reference to the issue that the star button interacts with.
+       */
+      issueRef: {type: Object},
+      /**
+       * Whether the issue is starred (used for accessing easily).
+       */
+      _starredIssues: {type: Set},
+      /**
+       * Whether the issue's star state is being fetched. This is taken from
+       * the component's parent, which is expected to handle fetching initial
+       * star state for an issue.
+       */
+      _fetchingIsStarred: {type: Boolean},
+      /**
+       * A Map of all issues currently being starred.
+       */
+      _starringIssues: {type: Object},
+      /**
+       * The currently logged in user. Required to determine if the user can
+       * star.
+       */
+      _currentUserName: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /**
+     * @type {IssueRef}
+     */
+    this.issueRef = {};
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._currentUserName = users.currentUserName(state);
+
+    // TODO(crbug.com/monorail/7374): Remove references to issueV0 in
+    // <mr-star>.
+    this._starringIssues = issueV0.starringIssues(state);
+    this._starredIssues = issueV0.starredIssues(state);
+    this._fetchingIsStarred = issueV0.requests(state).fetchIsStarred.requesting;
+  }
+
+  /** @override */
+  get type() {
+    return 'issue';
+  }
+
+  /**
+   * @return {boolean} Whether there's an in-flight star request.
+   */
+  get _isStarring() {
+    const requestKey = issueRefToString(this.issueRef);
+    if (this._starringIssues.has(requestKey)) {
+      return this._starringIssues.get(requestKey).requesting;
+    }
+    return false;
+  }
+
+  /** @override */
+  get isLoggedIn() {
+    return !!this._currentUserName;
+  }
+
+  /** @override */
+  get requesting() {
+    return this._fetchingIsStarred || this._isStarring;
+  }
+
+  /** @override */
+  get isStarred() {
+    return this._starredIssues.has(issueRefToString(this.issueRef));
+  }
+
+  /** @override */
+  star() {
+    store.dispatch(issueV0.star(this.issueRef, true));
+  }
+
+  /** @override */
+  unstar() {
+    store.dispatch(issueV0.star(this.issueRef, false));
+  }
+}
+
+customElements.define('mr-issue-star', MrIssueStar);
diff --git a/static_src/elements/framework/mr-star/mr-issue-star.test.js b/static_src/elements/framework/mr-star/mr-issue-star.test.js
new file mode 100644
index 0000000..bb618f7
--- /dev/null
+++ b/static_src/elements/framework/mr-star/mr-issue-star.test.js
@@ -0,0 +1,85 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueStar} from './mr-issue-star.js';
+import {issueRefToString} from 'shared/convertersV0.js';
+import sinon from 'sinon';
+
+
+let element;
+
+describe('mr-issue-star', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-star');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueStar);
+  });
+
+  it('starring logins user when user is not logged in', async () => {
+    element._currentUserName = undefined;
+    sinon.stub(element, 'login');
+
+    await element.updateComplete;
+
+    const star = element.shadowRoot.querySelector('button');
+
+    star.click();
+
+    sinon.assert.calledOnce(element.login);
+  });
+
+  it('_isStarring true only when issue ref is being starred', async () => {
+    element._starringIssues = new Map([['chromium:22', {requesting: true}]]);
+    element.issueRef = {projectName: 'chromium', localId: 5};
+
+    assert.isFalse(element._isStarring);
+
+    element.issueRef = {projectName: 'chromium', localId: 22};
+
+    assert.isTrue(element._isStarring);
+
+    element._starringIssues = new Map([['chromium:22', {requesting: false}]]);
+
+    assert.isFalse(element._isStarring);
+  });
+
+  it('starring is disabled when _isStarring true', () => {
+    element._currentUserName = 'users/1234';
+    sinon.stub(element, '_isStarring').get(() => true);
+
+    assert.isFalse(element._starringEnabled);
+  });
+
+  it('starring is disabled when _fetchingIsStarred true', () => {
+    element._currentUserName = 'users/1234';
+    element._fetchingIsStarred = true;
+
+    assert.isFalse(element._starringEnabled);
+  });
+
+  it('_starredIssues changes displayed icon', async () => {
+    element.issueRef = {projectName: 'proj', localId: 1};
+
+    element._starredIssues = new Set([issueRefToString(element.issueRef)]);
+
+    await element.updateComplete;
+
+    const star = element.shadowRoot.querySelector('button');
+    assert.equal(star.textContent.trim(), 'star');
+
+    element._starredIssues = new Set();
+
+    await element.updateComplete;
+
+    assert.equal(star.textContent.trim(), 'star_border');
+  });
+});
diff --git a/static_src/elements/framework/mr-star/mr-project-star.js b/static_src/elements/framework/mr-star/mr-project-star.js
new file mode 100644
index 0000000..14b2c73
--- /dev/null
+++ b/static_src/elements/framework/mr-star/mr-project-star.js
@@ -0,0 +1,148 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {connectStore, store} from 'reducers/base.js';
+import * as users from 'reducers/users.js';
+import {stars} from 'reducers/stars.js';
+import {projectAndUserToStarName} from 'shared/converters.js';
+import {MrStar} from './mr-star.js';
+import 'shared/typedef.js';
+
+
+/**
+ * `<mr-project-star>`
+ *
+ * A button for starring a project.
+ *
+ */
+export class MrProjectStar extends connectStore(MrStar) {
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Resource name of the project being starred.
+       */
+      name: {type: String},
+      /**
+       * List of all stars, indexed by star name.
+       */
+      _stars: {type: Object},
+      /**
+       * Whether project stars are currently being fetched.
+       */
+      _fetchingStars: {type: Boolean},
+      /**
+       * Request data for projects currently being starred.
+       */
+      _starringProjects: {type: Object},
+      /**
+       * Request data for projects currently being unstarred.
+       */
+      _unstarringProjects: {type: Object},
+      /**
+       * The currently logged in user. Required to determine if the user can
+       * star.
+       */
+      _currentUserName: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    /** @type {string} */
+    this.name = undefined;
+
+    /** @type {boolean} */
+    this._fetchingStars = false;
+
+    /** @type {Object<ProjectStarName, ReduxRequestState>} */
+    this._starringProjects = {};
+
+    /** @type {Object<ProjectStarName, ReduxRequestState>} */
+    this._unstarringProjects = {};
+
+    /** @type {Object<StarName, Star>} */
+    this._stars = {};
+
+    /** @type {string} */
+    this._currentUserName = undefined;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._currentUserName = users.currentUserName(state);
+
+    this._stars = stars.byName(state);
+
+    const requests = stars.requests(state);
+    this._fetchingStars = requests.listProjects.requesting;
+    this._starringProjects = requests.starProject;
+    this._unstarringProjects = requests.unstarProject;
+  }
+
+  /** @override */
+  get type() {
+    return 'project';
+  }
+
+  /**
+   * @return {string} The resource name of the ProjectStar.
+   */
+  get _starName() {
+    return projectAndUserToStarName(this.name, this._currentUserName);
+  }
+
+  /**
+   * @return {ProjectStar} The ProjectStar object for the referenced project,
+   *   if one exists.
+   */
+  get _projectStar() {
+    const name = this._starName;
+    if (!(name in this._stars)) return {};
+    return this._stars[name];
+  }
+
+  /**
+   * @return {boolean} Whether there's an in-flight star request.
+   */
+  get _isStarring() {
+    const requestKey = this._starName;
+    if (requestKey in this._starringProjects &&
+        this._starringProjects[requestKey].requesting) {
+      return true;
+    }
+    if (requestKey in this._unstarringProjects &&
+        this._unstarringProjects[requestKey].requesting) {
+      return true;
+    }
+    return false;
+  }
+
+  /** @override */
+  get isLoggedIn() {
+    return !!this._currentUserName;
+  }
+
+  /** @override */
+  get requesting() {
+    return this._fetchingStars || this._isStarring;
+  }
+
+  /** @override */
+  get isStarred() {
+    return !!(this._projectStar && this._projectStar.name);
+  }
+
+  /** @override */
+  star() {
+    store.dispatch(stars.starProject(this.name, this._currentUserName));
+  }
+
+  /** @override */
+  unstar() {
+    store.dispatch(stars.unstarProject(this.name, this._currentUserName));
+  }
+}
+
+customElements.define('mr-project-star', MrProjectStar);
diff --git a/static_src/elements/framework/mr-star/mr-project-star.test.js b/static_src/elements/framework/mr-star/mr-project-star.test.js
new file mode 100644
index 0000000..6afd982
--- /dev/null
+++ b/static_src/elements/framework/mr-star/mr-project-star.test.js
@@ -0,0 +1,181 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrProjectStar} from './mr-project-star.js';
+import {stars} from 'reducers/stars.js';
+
+let element;
+
+describe('mr-project-star (disconnected)', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-project-star');
+    document.body.appendChild(element);
+
+    sinon.stub(element, 'stateChanged');
+    sinon.spy(stars, 'starProject');
+    sinon.spy(stars, 'unstarProject');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    stars.starProject.restore();
+    stars.unstarProject.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrProjectStar);
+  });
+
+  it('clicking on star when logged out logs in user', async () => {
+    element._currentUserName = undefined;
+    sinon.stub(element, 'login');
+
+    await element.updateComplete;
+
+    const star = element.shadowRoot.querySelector('button');
+
+    star.click();
+
+    sinon.assert.calledOnce(element.login);
+  });
+
+  it('star dispatches star request', () => {
+    element._currentUserName = 'users/1234';
+    element.name = 'projects/monorail';
+
+    element.star();
+
+    sinon.assert.calledWith(stars.starProject,
+        'projects/monorail', 'users/1234');
+  });
+
+  it('unstar dispatches unstar request', () => {
+    element._currentUserName = 'users/1234';
+    element.name = 'projects/monorail';
+
+    element.unstar();
+
+    sinon.assert.calledWith(stars.unstarProject,
+        'projects/monorail', 'users/1234');
+  });
+
+  describe('isStarred', () => {
+    beforeEach(() => {
+      element._stars = {
+        'users/1234/projectStars/monorail':
+            {name: 'users/1234/projectStars/monorail'},
+        'users/5678/projectStars/chromium':
+            {name: 'users/5678/projectStars/chromium'},
+      };
+    });
+
+    it('false when no data', () => {
+      element._stars = {};
+      assert.isFalse(element.isStarred);
+    });
+
+    it('false when user is not logged in', () => {
+      element._currentUserName = '';
+      element.name = 'projects/monorail';
+
+      assert.isFalse(element.isStarred);
+    });
+
+    it('false when project is not starred', () => {
+      element._currentUserName = 'users/1234';
+      element.name = 'projects/chromium';
+
+      assert.isFalse(element.isStarred);
+
+      element._currentUserName = 'users/5678';
+      element.name = 'projects/monorail';
+
+      assert.isFalse(element.isStarred);
+    });
+
+    it('true when user has starred project', () => {
+      element._currentUserName = 'users/1234';
+      element.name = 'projects/monorail';
+
+      assert.isTrue(element.isStarred);
+
+      element._currentUserName = 'users/5678';
+      element.name = 'projects/chromium';
+
+      assert.isTrue(element.isStarred);
+    });
+  });
+
+  describe('_starringEnabled', () => {
+    beforeEach(() => {
+      element._currentUserName = 'users/1234';
+      element.name = 'projects/monorail';
+    });
+
+    it('disabled when user is not logged in', () => {
+      element._currentUserName = '';
+
+      assert.isFalse(element._starringEnabled);
+    });
+
+    it('disabled when stars are being fetched', () => {
+      element._fetchingStars = true;
+      element._starringProjects = {};
+      element._unstarringProjects = {};
+
+      assert.isFalse(element._starringEnabled);
+    });
+
+    it('disabled when user is starring project', () => {
+      element._fetchingStars = false;
+      element._starringProjects =
+          {'users/1234/projectStars/monorail': {requesting: true}};
+      element._unstarringProjects = {};
+
+      assert.isFalse(element._starringEnabled);
+    });
+
+    it('disabled when user is unstarring project', () => {
+      element._fetchingStars = false;
+      element._starringProjects = {};
+      element._unstarringProjects =
+          {'users/1234/projectStars/monorail': {requesting: true}};
+
+      assert.isFalse(element._starringEnabled);
+    });
+
+    it('enabled when user is starring an unrelated project', () => {
+      element._fetchingStars = false;
+      element._starringProjects = {
+        'users/1234/projectStars/chromium': {requesting: true},
+        'users/1234/projectStars/monorail': {requesting: false},
+      };
+      element._unstarringProjects = {};
+
+      assert.isTrue(element._starringEnabled);
+    });
+
+    it('enabled when user is unstarring an unrelated project', () => {
+      element._fetchingStars = false;
+      element._starringProjects = {};
+      element._unstarringProjects = {
+        'users/1234/projectStars/chromium': {requesting: true},
+        'users/1234/projectStars/monorail': {requesting: false},
+      };
+
+      assert.isTrue(element._starringEnabled);
+    });
+
+    it('enabled when no in-flight requests', () => {
+      element._fetchingStars = false;
+      element._starringProjects = {};
+      element._unstarringProjects = {};
+
+      assert.isTrue(element._starringEnabled);
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-star/mr-star.js b/static_src/elements/framework/mr-star/mr-star.js
new file mode 100644
index 0000000..fe509be
--- /dev/null
+++ b/static_src/elements/framework/mr-star/mr-star.js
@@ -0,0 +1,235 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<mr-star>`
+ *
+ * A button for starring a resource. Does not directly integrate with app
+ * state. Subclasses by <mr-issue-star> and <mr-project-star>, which add
+ * resource-specific logic for state management.
+ *
+ */
+export class MrStar extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+        --mr-star-size: var(--chops-icon-font-size);
+      }
+      button {
+        background: none;
+        border: none;
+        cursor: pointer;
+        padding: 0;
+        margin: 0;
+        display: flex;
+        align-items: center;
+      }
+      /* TODO(crbug.com/monorail/8008): Add nicer looking loading style. */
+      button.loading {
+        opacity: 0.5;
+        cursor: default;
+      }
+      i.material-icons {
+        font-size: var(--mr-star-size);
+        color: var(--chops-primary-icon-color);
+      }
+      i.material-icons.starred {
+        color: var(--chops-primary-accent-color);
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    const {isStarred} = this;
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <button class="star-button"
+        @click=${this._loginOrStar}
+        title=${this._starToolTip}
+        role="checkbox"
+        aria-checked=${isStarred ? 'true' : 'false'}
+        class=${this.requesting ? 'loading' : ''}
+      >
+        ${isStarred ? html`
+          <i class="material-icons starred" role="presentation">
+            star
+          </i>
+        `: html`
+          <i class="material-icons" role="presentation">
+            star_border
+          </i>
+        `}
+      </button>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Note: In order for re-renders to happen based on the getters defined
+       * in this class, those getters must have values based on properties.
+       * Subclasses of <mr-star> are not expected to inherit <mr-star>'s
+       * properties, but they should make sure their getter implementations
+       * are also backed by properties.
+       */
+      _isStarred: {type: Boolean},
+      _isLoggedIn: {type: Boolean},
+      _canStar: {type: Boolean},
+      _requesting: {type: Boolean},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    /**
+     * @type {boolean} Whether the user has starred the resource or not.
+     */
+    this._isStarred = false;
+
+    /**
+     * @type {boolean} If the user is logged in.
+     */
+    this._isLoggedIn = false;
+
+    /**
+     * @return {boolean} Whether the user has permission to star the star.
+     */
+    this._canStar = true;
+
+    /**
+     * @return {boolean} Whether there's an in-flight request to star
+     * the resource.
+     */
+    this._requesting = false;
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    // Prevent clicks on this element from causing navigation if the element
+    // is embedded inside a link.
+    this.addEventListener('click', (e) => e.preventDefault());
+  }
+
+  /**
+   * @return {boolean} If the user is logged in.
+   */
+  get isLoggedIn() {
+    return this._isLoggedIn;
+  }
+
+  /**
+   * @return {boolean} If there's an in-flight request that might affect the
+   *   star's data.
+   */
+  get requesting() {
+    return this._requesting;
+  }
+
+  /**
+   * @return {boolean} Whether the resource is starred or not.
+   */
+  get isStarred() {
+    return this._isStarred;
+  }
+
+  /**
+   * @return {boolean} If the user has permission to star.
+   */
+  get canStar() {
+    return this._canStar;
+  }
+
+  /**
+   * @return {boolean}
+   */
+  get _starringEnabled() {
+    return this.isLoggedIn && this.canStar && !this.requesting;
+  }
+
+  /**
+   * @return {string} The name of the resource kind being starred.
+   * ie: issue, project, etc.
+   */
+  get type() {
+    return 'resource';
+  }
+
+  /**
+   * @return {string} the title to display on the star button.
+   */
+  get _starToolTip() {
+    if (!this.isLoggedIn) {
+      return `Login to star this ${this.type}.`;
+    }
+    if (!this.canStar) {
+      return `You don't have permission to star this ${this.type}.`;
+    }
+    if (this.requesting) {
+      return `Loading star state for this ${this.type}.`;
+    }
+    return `${this.isStarred ? 'Unstar' : 'Star'} this ${this.type}.`;
+  }
+
+  /**
+   * Logins the user if they're not logged in. Otherwise, stars or
+   * unstars the resource based on star state.
+   */
+  _loginOrStar() {
+    if (!this.isLoggedIn) {
+      this.login();
+    } else {
+      this.toggleStar();
+    }
+  }
+
+  /**
+   * Logs in the user.
+   */
+  login() {
+    // TODO(crbug.com/monorail/6073): Replace this logic with a function call
+    // when moving authentication to frontend.
+    // HACK: In our current login implementation, login URLs can only be
+    // generated by the backend which makes piping a login URL into a component
+    // a <mr-star> complex. To get around this, we're using the
+    // legacy window.CS_env infrastructure.
+    window.location.href = window.CS_env.login_url;
+  }
+
+  /**
+   * Stars or unstars the resource based on the user's interaction.
+   */
+  toggleStar() {
+    if (!this._starringEnabled) return;
+    if (this.isStarred) {
+      this.unstar();
+    } else {
+      this.star();
+    }
+  }
+
+  /**
+   * Stars the given resource. To be implemented by a subclass.
+   */
+  star() {
+    throw new Error('Method not implemented.');
+  }
+
+  /**
+   * Unstars the given resource. To be implemented by a subclass.
+   */
+  unstar() {
+    throw new Error('Method not implemented.');
+  }
+}
+
+customElements.define('mr-star', MrStar);
diff --git a/static_src/elements/framework/mr-star/mr-star.test.js b/static_src/elements/framework/mr-star/mr-star.test.js
new file mode 100644
index 0000000..4db7877
--- /dev/null
+++ b/static_src/elements/framework/mr-star/mr-star.test.js
@@ -0,0 +1,302 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import sinon from 'sinon';
+import {assert} from 'chai';
+
+import {MrStar} from './mr-star.js';
+
+let element;
+
+describe('mr-star', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-star');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    if (document.body.contains(element)) {
+      document.body.removeChild(element);
+    }
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrStar);
+  });
+
+  it('unimplemented methods throw errors', () => {
+    assert.throws(element.star, 'Method not implemented.');
+    assert.throws(element.unstar, 'Method not implemented.');
+  });
+
+  describe('clicking star toggles star state', () => {
+    beforeEach(() => {
+      sinon.stub(element, 'star');
+      sinon.stub(element, 'unstar');
+      element._isLoggedIn = true;
+      element._canStar = true;
+    });
+
+    it('unstarred star', async () => {
+      element._isStarred = false;
+
+      await element.updateComplete;
+
+      sinon.assert.notCalled(element.star);
+      sinon.assert.notCalled(element.unstar);
+
+      element.shadowRoot.querySelector('button').click();
+
+      sinon.assert.calledOnce(element.star);
+      sinon.assert.notCalled(element.unstar);
+    });
+
+    it('starred star', async () => {
+      element._isStarred = true;
+
+      await element.updateComplete;
+
+      sinon.assert.notCalled(element.star);
+      sinon.assert.notCalled(element.unstar);
+
+      element.shadowRoot.querySelector('button').click();
+
+      sinon.assert.notCalled(element.star);
+      sinon.assert.calledOnce(element.unstar);
+    });
+  });
+
+  it('clicking while logged out logs you in', async () => {
+    sinon.stub(element, 'login');
+    element._isLoggedIn = false;
+    element._canStar = true;
+
+    await element.updateComplete;
+
+    sinon.assert.notCalled(element.login);
+
+    element.shadowRoot.querySelector('button').click();
+
+    sinon.assert.calledOnce(element.login);
+  });
+
+  describe('toggleStar', () => {
+    beforeEach(() => {
+      sinon.stub(element, 'star');
+      sinon.stub(element, 'unstar');
+    });
+
+    it('stars when unstarred', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = false;
+
+      element.toggleStar();
+
+      sinon.assert.calledOnce(element.star);
+      sinon.assert.notCalled(element.unstar);
+    });
+
+    it('unstars when starred', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = true;
+
+      element.toggleStar();
+
+      sinon.assert.calledOnce(element.unstar);
+      sinon.assert.notCalled(element.star);
+    });
+
+    it('does nothing when user is not logged in', () => {
+      element._isLoggedIn = false;
+      element._canStar = true;
+      element._isStarred = true;
+
+      element.toggleStar();
+
+      sinon.assert.notCalled(element.unstar);
+      sinon.assert.notCalled(element.star);
+    });
+
+    it('does nothing when user does not have permission', () => {
+      element._isLoggedIn = true;
+      element._canStar = false;
+      element._isStarred = true;
+
+      element.toggleStar();
+
+      sinon.assert.notCalled(element.unstar);
+      sinon.assert.notCalled(element.star);
+    });
+
+    it('does nothing when stars are being fetched', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = true;
+      element._requesting = true;
+
+      element.toggleStar();
+
+      sinon.assert.notCalled(element.unstar);
+      sinon.assert.notCalled(element.star);
+    });
+  });
+
+  describe('_starringEnabled', () => {
+    it('enabled when user is logged in and has permission', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = true;
+      element._requesting = false;
+
+      assert.isTrue(element._starringEnabled);
+    });
+
+    it('disabled when user is logged out', () => {
+      element._isLoggedIn = false;
+      element._canStar = false;
+      element._isStarred = false;
+      element._requesting = false;
+
+      assert.isFalse(element._starringEnabled);
+    });
+
+    it('disabled when user has no permission', () => {
+      element._isLoggedIn = true;
+      element._canStar = false;
+      element._isStarred = true;
+      element._requesting = false;
+
+      assert.isFalse(element._starringEnabled);
+    });
+
+    it('disabled when requesting star', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = true;
+      element._requesting = true;
+
+      assert.isFalse(element._starringEnabled);
+    });
+  });
+
+  it('loading state shown when requesting', async () => {
+    element._requesting = true;
+    await element.updateComplete;
+
+    const star = element.shadowRoot.querySelector('button');
+
+    assert.isTrue(star.classList.contains('loading'));
+
+    element._requesting = false;
+    await element.updateComplete;
+
+    assert.isFalse(star.classList.contains('loading'));
+  });
+
+  it('isStarred changes displayed icon', async () => {
+    element._isStarred = true;
+    await element.updateComplete;
+
+    const star = element.shadowRoot.querySelector('button');
+    assert.equal(star.textContent.trim(), 'star');
+
+    element._isStarred = false;
+    await element.updateComplete;
+
+    assert.equal(star.textContent.trim(), 'star_border');
+  });
+
+  describe('mr-star nested inside a link', () => {
+    let parent;
+    let oldHash;
+
+    beforeEach(() => {
+      parent = document.createElement('a');
+      parent.setAttribute('href', '#test-hash');
+      parent.appendChild(element);
+
+      oldHash = window.location.hash;
+
+      sinon.stub(element, 'star');
+      sinon.stub(element, 'unstar');
+    });
+
+    afterEach(() => {
+      window.location.hash = oldHash;
+    });
+
+    it('clicking to star does not cause navigation', async () => {
+      sinon.spy(element, 'toggleStar');
+      element._isLoggedIn = true;
+      element._canStar = true;
+      await element.updateComplete;
+
+      element.shadowRoot.querySelector('button').click();
+
+      assert.notEqual(window.location.hash, '#test-hash');
+      sinon.assert.calledOnce(element.toggleStar);
+    });
+
+    it('clicking on disabled star does not cause navigation', async () => {
+      element._isLoggedIn = true;
+      element._canStar = false;
+      await element.updateComplete;
+
+      element.shadowRoot.querySelector('button').click();
+
+      assert.notEqual(window.location.hash, '#test-hash');
+    });
+
+    it('clicking on link still navigates', async () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      await element.updateComplete;
+
+      parent.click();
+
+      assert.equal(window.location.hash, '#test-hash');
+    });
+  });
+
+  describe('_starToolTip', () => {
+    it('not logged in', () => {
+      element._isLoggedIn = false;
+      element._canStar = false;
+      assert.equal(element._starToolTip,
+          `Login to star this resource.`);
+    });
+
+    it('no permission to star', () => {
+      element._isLoggedIn = true;
+      element._canStar = false;
+      assert.equal(element._starToolTip,
+          `You don't have permission to star this resource.`);
+    });
+
+    it('star is loading', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._requesting = true;
+      assert.equal(element._starToolTip,
+          `Loading star state for this resource.`);
+    });
+
+    it('issue is not starred', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = false;
+      assert.equal(element._starToolTip,
+          `Star this resource.`);
+    });
+
+    it('issue is starred', () => {
+      element._isLoggedIn = true;
+      element._canStar = true;
+      element._isStarred = true;
+      assert.equal(element._starToolTip,
+          `Unstar this resource.`);
+    });
+  });
+});
diff --git a/static_src/elements/framework/mr-tabs/mr-tabs.js b/static_src/elements/framework/mr-tabs/mr-tabs.js
new file mode 100644
index 0000000..d14688e
--- /dev/null
+++ b/static_src/elements/framework/mr-tabs/mr-tabs.js
@@ -0,0 +1,99 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import 'shared/typedef.js';
+
+/**
+ * `<mr-tabs>`
+ *
+ * A Material Design tabs strip. https://material.io/components/tabs/
+ *
+ */
+export class MrTabs extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      ul {
+        display: flex;
+        list-style: none;
+        margin: 0;
+        padding: 0;
+      }
+      li {
+        color: var(--chops-choice-color);
+      }
+      li.selected {
+        color: var(--chops-active-choice-color);
+      }
+      li:hover {
+        background: var(--chops-primary-accent-bg);
+        color: var(--chops-active-choice-color);
+      }
+      a {
+        color: inherit;
+        text-decoration: none;
+
+        display: inline-block;
+        line-height: 38px;
+        padding: 0 24px;
+      }
+      li.selected a {
+        border-bottom: solid 2px;
+      }
+      i.material-icons {
+        vertical-align: middle;
+        margin-right: 4px;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <ul>
+        ${this.items.map(this._renderTab.bind(this))}
+      </ul>
+    `;
+  }
+
+  /**
+   * Renders one tab.
+   * @param {MenuItem} item
+   * @param {number} index
+   * @return {TemplateResult}
+   */
+  _renderTab(item, index) {
+    return html`
+      <li class=${index === this.selected ? 'selected' : ''}>
+        <a href=${item.url}>
+          <i class="material-icons" ?hidden=${!item.icon}>
+            ${item.icon}
+          </i>
+          ${item.text}
+        </a>
+      </li>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      items: {type: Array},
+      selected: {type: Number},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /** @type {Array<MenuItem>} */
+    this.items = [];
+    this.selected = 0;
+  }
+}
+
+customElements.define('mr-tabs', MrTabs);
diff --git a/static_src/elements/framework/mr-tabs/mr-tabs.test.js b/static_src/elements/framework/mr-tabs/mr-tabs.test.js
new file mode 100644
index 0000000..1d55c39
--- /dev/null
+++ b/static_src/elements/framework/mr-tabs/mr-tabs.test.js
@@ -0,0 +1,38 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrTabs} from './mr-tabs.js';
+
+/** @type {MrTabs} */
+let element;
+
+describe('mr-tabs', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('mr-tabs');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrTabs);
+  });
+
+  it('renders tabs', async () => {
+    element.items = [
+      {text: 'Text 1'},
+      {text: 'Text 2', icon: 'done', url: 'https://url'},
+    ];
+    element.selected = 1;
+    await element.updateComplete;
+
+    const items = element.shadowRoot.querySelectorAll('li');
+    assert.equal(items[0].className, '');
+    assert.equal(items[1].className, 'selected');
+  });
+});
diff --git a/static_src/elements/framework/mr-upload/mr-upload.js b/static_src/elements/framework/mr-upload/mr-upload.js
new file mode 100644
index 0000000..5fee672
--- /dev/null
+++ b/static_src/elements/framework/mr-upload/mr-upload.js
@@ -0,0 +1,322 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+/**
+ * `<mr-upload>`
+ *
+ * A file uploading widget for use in adding attachments and similar things.
+ *
+ */
+export class MrUpload extends LitElement {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: block;
+          width: 100%;
+          padding: 0.25em 4px;
+          border: 1px dashed var(--chops-gray-300);
+          box-sizing: border-box;
+          border-radius: 8px;
+          transition: background 0.2s ease-in-out,
+            border-color 0.2s ease-in-out;
+        }
+        :host([hidden]) {
+          display: none;
+        }
+        :host([expanded]) {
+          /* Expand the drag and drop area when a file is being dragged. */
+          min-height: 120px;
+        }
+        :host([highlighted]) {
+          border-color: var(--chops-primary-accent-color);
+          background: var(--chops-active-choice-bg);
+        }
+        input[type="file"] {
+          /* We need the file uploader to be hidden but still accessible. */
+          opacity: 0;
+          width: 0;
+          height: 0;
+          position: absolute;
+          top: -9999;
+          left: -9999;
+        }
+        input[type="file"]:focus + label {
+          /* TODO(zhangtiff): Find a way to either mimic native browser focus
+           * styles or make focus styles more consistent. */
+          box-shadow: 0 0 3px 1px hsl(193, 82%, 63%);
+        }
+        label.button {
+          margin-right: 8px;
+          padding: 0.1em 4px;
+          display: inline-flex;
+          width: auto;
+          cursor: pointer;
+          border: var(--chops-normal-border);
+          margin-left: 0;
+        }
+        label.button i.material-icons {
+          font-size: var(--chops-icon-font-size);
+        }
+        ul {
+          display: flex;
+          align-items: flex-start;
+          justify-content: flex-start;
+          flex-direction: column;
+        }
+        ul[hidden] {
+          display: none;
+        }
+        li {
+          display: inline-flex;
+          align-items: center;
+        }
+        li i.material-icons {
+          font-size: 14px;
+          margin: 0;
+        }
+        /* TODO(zhangtiff): Create a shared Material icon button component. */
+        button {
+          border-radius: 50%;
+          cursor: pointer;
+          background: 0;
+          border: 0;
+          padding: 0.25em;
+          margin-left: 4px;
+          display: inline-flex;
+          align-items: center;
+          justify-content: center;
+          transition: background 0.2s ease-in-out;
+        }
+        button:hover {
+          background: var(--chops-gray-200);
+        }
+        .controls {
+          display: flex;
+          flex-direction: row;
+          align-items: center;
+          justify-content: flex-start;
+          width: 100%;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <div class="controls">
+        <input id="file-uploader" type="file" multiple @change=${this._filesChanged}>
+        <label class="button" for="file-uploader">
+          <i class="material-icons" role="presentation">attach_file</i>Add attachments
+        </label>
+        Drop files here to add them (Max: 10.0 MB per comment)
+      </div>
+      <ul ?hidden=${!this.files || !this.files.length}>
+        ${this.files.map((file, i) => html`
+          <li>
+            ${file.name}
+            <button data-index=${i} @click=${this._removeFile}>
+              <i class="material-icons">clear</i>
+            </button>
+          </li>
+        `)}
+      </ul>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      files: {type: Array},
+      highlighted: {
+        type: Boolean,
+        reflect: true,
+      },
+      expanded: {
+        type: Boolean,
+        reflect: true,
+      },
+      _boundOnDragIntoWindow: {type: Object},
+      _boundOnDragOutOfWindow: {type: Object},
+      _boundOnDragInto: {type: Object},
+      _boundOnDragLeave: {type: Object},
+      _boundOnDrop: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.expanded = false;
+    this.highlighted = false;
+    this.files = [];
+    this._boundOnDragIntoWindow = this._onDragIntoWindow.bind(this);
+    this._boundOnDragOutOfWindow = this._onDragOutOfWindow.bind(this);
+    this._boundOnDragInto = this._onDragInto.bind(this);
+    this._boundOnDragLeave = this._onDragLeave.bind(this);
+    this._boundOnDrop = this._onDrop.bind(this);
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+    this.addEventListener('dragenter', this._boundOnDragInto);
+    this.addEventListener('dragover', this._boundOnDragInto);
+
+    this.addEventListener('dragleave', this._boundOnDragLeave);
+    this.addEventListener('drop', this._boundOnDrop);
+
+    window.addEventListener('dragenter', this._boundOnDragIntoWindow);
+    window.addEventListener('dragover', this._boundOnDragIntoWindow);
+    window.addEventListener('dragleave', this._boundOnDragOutOfWindow);
+    window.addEventListener('drop', this._boundOnDragOutOfWindow);
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    window.removeEventListener('dragenter', this._boundOnDragIntoWindow);
+    window.removeEventListener('dragover', this._boundOnDragIntoWindow);
+    window.removeEventListener('dragleave', this._boundOnDragOutOfWindow);
+    window.removeEventListener('drop', this._boundOnDragOutOfWindow);
+  }
+
+  reset() {
+    this.files = [];
+  }
+
+  get hasAttachments() {
+    return this.files.length !== 0;
+  }
+
+  async loadFiles() {
+    // TODO(zhangtiff): Add preloading of files on change.
+    if (!this.files || !this.files.length) return [];
+    const loads = this.files.map(this._loadLocalFile);
+    return await Promise.all(loads);
+  }
+
+  _onDragInto(e) {
+    // Combined event handler for dragenter and dragover.
+    if (!this._eventGetFiles(e).length) return;
+    e.preventDefault();
+    this.highlighted = true;
+  }
+
+  _onDragLeave(e) {
+    // Unhighlight the drop area when the user undrops the component.
+    if (!this._eventGetFiles(e).length) return;
+    e.preventDefault();
+    this.highlighted = false;
+  }
+
+  _onDrop(e) {
+    // Add the files the user is dragging when dragging into the component.
+    const files = this._eventGetFiles(e);
+    if (!files.length) return;
+    e.preventDefault();
+    this.highlighted = false;
+    this._addFiles(files);
+  }
+
+  _onDragIntoWindow(e) {
+    // Expand the drop area when any file is being dragged in the window.
+    if (!this._eventGetFiles(e).length) return;
+    e.preventDefault();
+    this.expanded = true;
+  }
+
+  _onDragOutOfWindow(e) {
+    // Unexpand the component when a file is no longer being dragged.
+    if (!this._eventGetFiles(e).length) return;
+    e.preventDefault();
+    this.expanded = false;
+  }
+
+  _eventGetFiles(e) {
+    if (!e || !e.dataTransfer) return [];
+    const dt = e.dataTransfer;
+
+    if (dt.items && dt.items.length) {
+      const filteredItems = [...dt.items].filter(
+          (item) => item.kind === 'file');
+      return filteredItems.map((item) => item.getAsFile());
+    }
+
+    return [...dt.files];
+  }
+
+  _loadLocalFile(f) {
+    // The FileReader API only accepts callbacks for asynchronous handling,
+    // so it's easier to use Promises here. But by wrapping this logic
+    // in a Promise, we can use async/await in outer code.
+    return new Promise((resolve, reject) => {
+      const r = new FileReader();
+      r.onloadend = () => {
+        resolve({filename: f.name, content: btoa(r.result)});
+      };
+      r.onerror = () => {
+        reject(r.error);
+      };
+
+      r.readAsBinaryString(f);
+    });
+  }
+
+  /**
+   * @param {Event} e
+   * @fires CustomEvent#change
+   * @private
+   */
+  _filesChanged(e) {
+    const input = e.currentTarget;
+    if (!input.files) return;
+    this._addFiles(input.files);
+    this.dispatchEvent(new CustomEvent('change'));
+  }
+
+  _addFiles(newFiles) {
+    if (!newFiles) return;
+    // Spread files to convert it from a FileList to an Array.
+    const files = [...newFiles].filter((f1) => {
+      const matchingFile = this.files.some((f2) => this._filesMatch(f1, f2));
+      return !matchingFile;
+    });
+
+    this.files = this.files.concat(files);
+  }
+
+  _filesMatch(a, b) {
+    // NOTE: This function could return a false positive if two files have the
+    // exact same name, lastModified time, size, and type but different
+    // content. This is extremely unlikely, however.
+    return a.name === b.name && a.lastModified === b.lastModified &&
+      a.size === b.size && a.type === b.type;
+  }
+
+  _removeFile(e) {
+    const target = e.currentTarget;
+
+    // This should always be an int.
+    const index = Number.parseInt(target.dataset.index);
+    if (index < 0 || index >= this.files.length) return;
+
+    this.files.splice(index, 1);
+
+    // Trigger an update.
+    this.files = [...this.files];
+  }
+}
+customElements.define('mr-upload', MrUpload);
diff --git a/static_src/elements/framework/mr-upload/mr-upload.test.js b/static_src/elements/framework/mr-upload/mr-upload.test.js
new file mode 100644
index 0000000..0a0b1e8
--- /dev/null
+++ b/static_src/elements/framework/mr-upload/mr-upload.test.js
@@ -0,0 +1,218 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrUpload} from './mr-upload.js';
+
+let element;
+let preventDefault;
+let mockEvent;
+
+
+describe('mr-upload', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-upload');
+    document.body.appendChild(element);
+
+    preventDefault = sinon.stub();
+
+    mockEvent = (properties) => {
+      return Object.assign({
+        preventDefault: preventDefault,
+      }, properties);
+    };
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrUpload);
+  });
+
+  it('reset clears files', () => {
+    element.files = [new File([''], 'filename.txt'), new File([''], 'hello')];
+
+    element.reset();
+
+    assert.deepEqual(element.files, []);
+  });
+
+  it('editing file selector adds files', () => {
+    const files = [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+    ];
+    assert.deepEqual(element.files, []);
+
+    // NOTE: There is currently no way to use JavaScript to set the value of
+    // an HTML file input.
+
+    element._filesChanged({
+      currentTarget: {
+        files: files,
+      },
+    });
+
+    assert.deepEqual(element.files, files);
+  });
+
+  it('files are rendered', async () => {
+    element.files = [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+      new File([''], 'file.png'),
+    ];
+
+    await element.updateComplete;
+
+    const items = element.shadowRoot.querySelectorAll('li');
+
+    assert.equal(items.length, 3);
+
+    assert.include(items[0].textContent, 'filename.txt');
+    assert.include(items[1].textContent, 'hello');
+    assert.include(items[2].textContent, 'file.png');
+  });
+
+  it('clicking removes file', async () => {
+    element.files = [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+      new File([''], 'file.png'),
+    ];
+
+    await element.updateComplete;
+
+    let items = element.shadowRoot.querySelectorAll('li');
+
+    assert.equal(items.length, 3);
+
+    items[1].querySelector('button').click();
+
+    await element.updateComplete;
+
+    items = element.shadowRoot.querySelectorAll('li');
+
+    assert.equal(items.length, 2);
+
+    assert.include(items[0].textContent, 'filename.txt');
+    assert.include(items[1].textContent, 'file.png');
+
+    // Make sure clicking works even for children targets.
+    items[0].querySelector('i.material-icons').click();
+
+    await element.updateComplete;
+
+    items = element.shadowRoot.querySelectorAll('li');
+
+    assert.equal(items.length, 1);
+
+    assert.include(items[0].textContent, 'file.png');
+  });
+
+  it('duplicate files are ignored', () => {
+    const file1 = new File([''], 'filename.txt');
+    const file2 = new File([''], 'woahhh');
+    const file3 = new File([''], 'filename');
+
+    element.files = [file1, file2];
+
+    element._addFiles([file2, file3]);
+
+    assert.deepEqual(element.files, [file1, file2, file3]);
+  });
+
+  it('dragging file into window expands element', () => {
+    assert.isFalse(element.expanded);
+    assert.deepEqual(element.files, []);
+
+    element._onDragIntoWindow(mockEvent({dataTransfer: {files: [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+    ]}}));
+
+    assert.isTrue(element.expanded);
+    assert.deepEqual(element.files, []);
+    assert.isTrue(preventDefault.calledOnce);
+
+    element._onDragOutOfWindow(mockEvent({dataTransfer: {files: [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+    ]}}));
+
+    assert.isFalse(element.expanded);
+    assert.deepEqual(element.files, []);
+    assert.isTrue(preventDefault.calledTwice);
+  });
+
+  it('dragging non-file into window does not expands element', () => {
+    assert.isFalse(element.expanded);
+
+    element._onDragIntoWindow(mockEvent(
+        {dataTransfer: {files: [], items: [{kind: 'notFile'}]}},
+    ));
+
+    assert.isFalse(element.expanded);
+    assert.isFalse(preventDefault.called);
+
+    element._onDragOutOfWindow(mockEvent(
+        {dataTransfer: {files: [], items: [{kind: 'notFile'}]}},
+    ));
+
+    assert.isFalse(element.expanded);
+    assert.isFalse(preventDefault.called);
+  });
+
+  it('dragging file over element highlights it', () => {
+    assert.isFalse(element.highlighted);
+    assert.deepEqual(element.files, []);
+
+    element._onDragInto(mockEvent({dataTransfer: {files: [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+    ]}}));
+
+    assert.isTrue(element.highlighted);
+    assert.deepEqual(element.files, []);
+    assert.isTrue(preventDefault.calledOnce);
+
+    element._onDragLeave(mockEvent({dataTransfer: {files: [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+    ]}}));
+
+    assert.isFalse(element.highlighted);
+    assert.deepEqual(element.files, []);
+    assert.isTrue(preventDefault.calledTwice);
+  });
+
+  it('dropping file over element selects it', () => {
+    const files = [
+      new File([''], 'filename.txt'),
+      new File([''], 'hello'),
+    ];
+    assert.deepEqual(element.files, []);
+
+    element._onDrop(mockEvent({dataTransfer: {files: files}}));
+
+    assert.isTrue(preventDefault.calledOnce);
+    assert.deepEqual(element.files, files);
+  });
+
+  it('loadFiles loads files', async () => {
+    element.files = [
+      new File(['some content'], 'filename.txt'),
+      new File([''], 'hello'),
+    ];
+
+    const uploads = await element.loadFiles();
+
+    assert.deepEqual(uploads, [
+      {content: 'c29tZSBjb250ZW50', filename: 'filename.txt'},
+      {content: '', filename: 'hello'},
+    ]);
+  });
+});
diff --git a/static_src/elements/framework/mr-warning/mr-warning.js b/static_src/elements/framework/mr-warning/mr-warning.js
new file mode 100644
index 0000000..51de376
--- /dev/null
+++ b/static_src/elements/framework/mr-warning/mr-warning.js
@@ -0,0 +1,51 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+
+/**
+ * `<mr-warning>`
+ *
+ * A container for showing warnings.
+ *
+ */
+export class MrWarning extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: flex;
+        align-items: center;
+        flex-direction: row;
+        justify-content: flex-start;
+        box-sizing: border-box;
+        width: 100%;
+        margin: 0.5em 0;
+        padding: 0.25em 8px;
+        border: 1px solid #FF6F00;
+        border-radius: 4px;
+        background: #FFF8E1;
+      }
+      :host([hidden]) {
+        display: none;
+      }
+      i.material-icons {
+        color: #FF6F00;
+        margin-right: 4px;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <i class="material-icons">warning</i>
+      <slot></slot>
+    `;
+  }
+}
+
+customElements.define('mr-warning', MrWarning);
diff --git a/static_src/elements/help/mr-click-throughs/mr-click-throughs.js b/static_src/elements/help/mr-click-throughs/mr-click-throughs.js
new file mode 100644
index 0000000..8b142f0
--- /dev/null
+++ b/static_src/elements/help/mr-click-throughs/mr-click-throughs.js
@@ -0,0 +1,185 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {store, connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+/**
+ * `<mr-click-throughs>`
+ *
+ * An element that displays help dialogs that the user is required
+ * to click through before they can participate in the community.
+ *
+ */
+export class MrClickThroughs extends connectStore(LitElement) {
+  /** @override */
+  constructor() {
+    super();
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      userDisplayName: {type: String},
+      prefs: {type: Object},
+      prefsLoaded: {type: Boolean},
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [SHARED_STYLES, css`
+      :host {
+        --chops-dialog-max-width: 800px;
+      }
+      h2 {
+        margin-top: 0;
+        display: flex;
+        justify-content: space-between;
+        font-weight: normal;
+        border-bottom: 2px solid white;
+        font-size: var(--chops-large-font-size);
+        padding-bottom: 0.5em;
+      }
+      .edit-actions {
+        width: 100%;
+        margin: 0.5em 0;
+        text-align: right;
+      }
+    `];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <chops-dialog
+        id="privacyDialog"
+        ?opened=${this._showPrivacyDialog}
+        forced
+      >
+        <h2>Email display settings</h2>
+
+        <p>There is a <a href="/hosting/settings">setting</a> to control how
+        your email address appears on comments and issues that you post.</p>
+
+        <p>Project members will always see your full email address.  By
+        default, other users who visit the site will see an
+        abbreviated version of your email address.</p>
+
+        <p>If you do not wish your email address to be shared, there
+        are other ways to <a
+        href="http://www.chromium.org/getting-involved">get
+        involved</a> in the community.  To report a problem when using
+        the Chrome browser, you may use the "Report an issue..."  item
+        on the "Help" menu.</p>
+
+
+        <div class="edit-actions">
+          <chops-button @click=${this.dismissPrivacyDialog}>
+            Got it
+          </chops-button>
+        </div>
+      </chops-dialog>
+
+      <chops-dialog
+        id="corpModeDialog"
+        ?opened=${this._showCorpModeDialog}
+        forced
+      >
+        <h2>This site hosts public issues in public projects</h2>
+
+        <p>Unlike our internal issue tracker, this site makes most
+        issues public, unless the issue is labeled with a Restrict-View-*
+        label, such as Restrict-View-Google.</p>
+
+        <p>Components are not used for permissions.  And, regardless of
+        restriction labels, the issue reporter, owner,
+        and Cc&apos;d users may always view the issue.</p>
+
+        ${this.prefs.get('restrict_new_issues') ? html`
+          <p>Your account is a member of a user group that indicates that
+          you may have access to confidential information.  To help prevent
+          leaks when working in public projects, the issue tracker UX has
+          been altered for you:</p>
+
+          <ul>
+            <li>When you open a new issue, the form will initially have a
+            Restrict-View-Google label.  If you know that your issue does
+            not contain confidential information, please remove the label.</li>
+            <li>When you view public issues, a red banner is shown to remind
+            you that any comments or attachments you post will be public.</li>
+          </ul>
+        ` : ''}
+
+        <div class="edit-actions">
+          <chops-button @click=${this.dismissCorpModeDialog}>
+            Got it
+          </chops-button>
+        </div>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.prefs = userV0.prefs(state);
+    this.prefsLoaded = userV0.currentUser(state).prefsLoaded;
+  }
+
+  /**
+   * Checks whether the user should see a dialogue telling them about
+   * Monorail's privacy settings.
+   */
+  get _showPrivacyDialog() {
+    if (!this.userDisplayName) return false;
+    if (!this.prefsLoaded) return false;
+    if (!this.prefs) return false;
+    if (this.prefs.get('privacy_click_through')) return false;
+    return true;
+  }
+
+  /**
+   * Computes whether the user should see the dialog telling them about corp mode.
+   */
+  get _showCorpModeDialog() {
+    // TODO(jrobbins): Replace this with a API call that gets the project.
+    if (window.CS_env.projectIsRestricted) return false;
+    if (!this.userDisplayName) return false;
+    if (!this.prefsLoaded) return false;
+    if (!this.prefs) return false;
+    if (!this.prefs.get('public_issue_notice')) return false;
+    if (this.prefs.get('corp_mode_click_through')) return false;
+    return true;
+  }
+
+  /**
+   * Event handler for dismissing Monorail's privacy notice.
+   */
+  dismissPrivacyDialog() {
+    this.dismissCue('privacy_click_through');
+  }
+
+  /**
+   * Event handler for dismissing corp mode.
+   */
+  dismissCorpModeDialog() {
+    this.dismissCue('corp_mode_click_through');
+  }
+
+  /**
+   * Dispatches a Redux action to tell Monorail's backend that the user
+   * clicked through a particular cue.
+   * @param {string} pref The pref to set to true.
+   */
+  dismissCue(pref) {
+    const newPrefs = [{name: pref, value: 'true'}];
+    store.dispatch(userV0.setPrefs(newPrefs, !!this.userDisplayName));
+  }
+}
+
+customElements.define('mr-click-throughs', MrClickThroughs);
diff --git a/static_src/elements/help/mr-click-throughs/mr-click-throughs.test.js b/static_src/elements/help/mr-click-throughs/mr-click-throughs.test.js
new file mode 100644
index 0000000..e735380
--- /dev/null
+++ b/static_src/elements/help/mr-click-throughs/mr-click-throughs.test.js
@@ -0,0 +1,120 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrClickThroughs} from './mr-click-throughs.js';
+import page from 'page';
+
+let element;
+
+describe('mr-click-throughs', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-click-throughs');
+    document.body.appendChild(element);
+
+    sinon.stub(page, 'call');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    page.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrClickThroughs);
+  });
+
+  it('stateChanged', () => {
+    const state = {userV0: {currentUser:
+      {prefs: new Map(), prefsLoaded: false}}};
+    element.stateChanged(state);
+    assert.deepEqual(element.prefs, new Map([['render_markdown', false]]));
+    assert.isFalse(element.prefsLoaded);
+  });
+
+  it('anon does not see privacy dialog', () => {
+    assert.isFalse(element._showPrivacyDialog);
+  });
+
+  it('signed in user sees no privacy dialog before prefs load', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = false;
+    assert.isFalse(element._showPrivacyDialog);
+  });
+
+  it('signed in user sees no privacy dialog if dismissal pref set', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map([['privacy_click_through', true]]);
+    assert.isFalse(element._showPrivacyDialog);
+  });
+
+  it('signed in user sees privacy dialog if dismissal pref missing', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map();
+    assert.isTrue(element._showPrivacyDialog);
+  });
+
+  it('anon does not see corp mode dialog', () => {
+    assert.isFalse(element._showCorpModeDialog);
+  });
+
+  it('signed in user sees no corp mode dialog before prefs load', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = false;
+    assert.isFalse(element._showCorpModeDialog);
+  });
+
+  it('signed in user sees no corp mode dialog if dismissal pref set', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map([['corp_mode_click_through', true]]);
+    assert.isFalse(element._showCorpModeDialog);
+  });
+
+  it('non-corp user sees no corp mode dialog', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map();
+    assert.isFalse(element._showCorpModeDialog);
+  });
+
+  it('corp user sees corp mode dialog if dismissal pref missing', () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map([['public_issue_notice', true]]);
+    assert.isTrue(element._showCorpModeDialog);
+  });
+
+  it('corp user sees no corp mode dialog in members-only project', () => {
+    window.CS_env = {projectIsRestricted: true};
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map([['public_issue_notice', true]]);
+    assert.isFalse(element._showCorpModeDialog);
+  });
+
+  it('corp user sees corp mode dialog with no RVG warning', async () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map([['public_issue_notice', true]]);
+
+    await element.updateComplete;
+    assert.notInclude(element.shadowRoot.innerHTML, 'altered');
+  });
+
+  it('corp user sees corp mode dialog with RVG warning', async () => {
+    element.userDisplayName = 'user@example.com';
+    element.prefsLoaded = true;
+    element.prefs = new Map([
+      ['public_issue_notice', true],
+      ['restrict_new_issues', true],
+    ]);
+
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'altered');
+  });
+});
diff --git a/static_src/elements/help/mr-cue/cue-helpers.js b/static_src/elements/help/mr-cue/cue-helpers.js
new file mode 100644
index 0000000..4aa30d7
--- /dev/null
+++ b/static_src/elements/help/mr-cue/cue-helpers.js
@@ -0,0 +1,49 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Shared helpers for dealing with how <mr-cue> element instances
+ * are used.
+ */
+
+export const cueNames = Object.freeze({
+  CODE_OF_CONDUCT: 'code_of_conduct',
+  AVAILABILITY_MSGS: 'availability_msgs',
+  SWITCH_TO_PARENT_ACCOUNT: 'switch_to_parent_account',
+  SEARCH_FOR_NUMBERS: 'search_for_numbers',
+});
+
+export const AVAILABLE_CUES = Object.freeze(new Set(Object.values(cueNames)));
+
+export const CUE_DISPLAY_PREFIX = 'cue.';
+
+/**
+ * Converts a cue name to the format expected by components like <mr-metadata>
+ * for the purpose of ordering fields.
+ *
+ * @param {string} cueName The name of the cue.
+ * @return {string} A "cue.cue_name" formatted String used in ordering cues
+ *   alongside field types (ie: Owner) in various field specs.
+ */
+export const cueNameToSpec = (cueName) => {
+  return CUE_DISPLAY_PREFIX + cueName;
+};
+
+/**
+ * Converts an issue field specifier to the name of the cue it references if
+ * it references a cue. ie: "cue.cue_name" would reference "cue_name".
+ *
+ * @param {string} spec A "cue.cue_name" format String specifying that a
+ *   specific cue should be mixed alongside issue fields in a component like
+ *   <mr-metadata>.
+ * @return {string} Name of the cue customized in the spec or an empty
+ *   String if the spec does not reference a cue.
+ */
+export const specToCueName = (spec) => {
+  spec = spec.toLowerCase();
+  if (spec.startsWith(CUE_DISPLAY_PREFIX)) {
+    return spec.substring(CUE_DISPLAY_PREFIX.length);
+  }
+  return '';
+};
diff --git a/static_src/elements/help/mr-cue/cue-helpers.test.js b/static_src/elements/help/mr-cue/cue-helpers.test.js
new file mode 100644
index 0000000..3bc084a
--- /dev/null
+++ b/static_src/elements/help/mr-cue/cue-helpers.test.js
@@ -0,0 +1,30 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {cueNameToSpec, specToCueName} from './cue-helpers.js';
+
+
+describe('cue-helpers', () => {
+  describe('cueNameToSpec', () => {
+    it('appends cue prefix', () => {
+      assert.equal(cueNameToSpec('test'), 'cue.test');
+    });
+  });
+
+  describe('specToCueName', () => {
+    it('extracts cue name from matching spec', () => {
+      assert.equal(specToCueName('cue.test'), 'test');
+      assert.equal(specToCueName('cue.hello-world'), 'hello-world');
+      assert.equal(specToCueName('cue.under_score'), 'under_score');
+    });
+
+    it('does not extract cue name from non-matching spec', () => {
+      assert.equal(specToCueName('.cue.test'), '');
+      assert.equal(specToCueName('hello-world-cue.'), '');
+      assert.equal(specToCueName('cu.under_score'), '');
+      assert.equal(specToCueName('field'), '');
+    });
+  });
+});
diff --git a/static_src/elements/help/mr-cue/mr-cue.js b/static_src/elements/help/mr-cue/mr-cue.js
new file mode 100644
index 0000000..22b1290
--- /dev/null
+++ b/static_src/elements/help/mr-cue/mr-cue.js
@@ -0,0 +1,282 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import qs from 'qs';
+import {store, connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {cueNames} from './cue-helpers.js';
+
+
+/**
+ * `<mr-cue>`
+ *
+ * An element that displays one of a set of predefined help messages
+ * iff that message is appropriate to the current user and page.
+ *
+ * TODO: Factor this class out into a base view component and separate
+ * usage-specific components, such as those for user prefs.
+ *
+ */
+export class MrCue extends connectStore(LitElement) {
+  /** @override */
+  constructor() {
+    super();
+    this.prefs = new Map();
+    this.issue = null;
+    this.referencedUsers = new Map();
+    this.nondismissible = false;
+    this.cuePrefName = '';
+    this.loginUrl = '';
+    this.hidden = this._shouldBeHidden(this.signedIn, this.prefsLoaded,
+        this.cuePrefName, this.message);
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issue: {type: Object},
+      referencedUsers: {type: Object},
+      user: {type: Object},
+      cuePrefName: {type: String},
+      nondismissible: {type: Boolean},
+      prefs: {type: Object},
+      prefsLoaded: {type: Boolean},
+      jumpLocalId: {type: Number},
+      loginUrl: {type: String},
+      hidden: {
+        type: Boolean,
+        reflect: true,
+      },
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [SHARED_STYLES, css`
+      :host {
+        display: block;
+        margin: 2px 0;
+        padding: 2px 4px 2px 8px;
+        background: var(--chops-notice-bubble-bg);
+        border: var(--chops-notice-border);
+        text-align: center;
+      }
+      :host([centered]) {
+        display: flex;
+        justify-content: center;
+      }
+      :host([hidden]) {
+        display: none;
+      }
+      button[hidden] {
+        visibility: hidden;
+      }
+      i.material-icons {
+        font-size: 14px;
+      }
+      button {
+        background: none;
+        border: none;
+        float: right;
+        padding: 2px;
+        cursor: pointer;
+        border-radius: 50%;
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+      }
+      button:hover {
+        background: rgba(0, 0, 0, .2);
+      }
+    `];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <button
+        @click=${this.dismiss}
+        title="Don't show this message again."
+        ?hidden=${this.nondismissible}>
+        <i class="material-icons">close</i>
+      </button>
+      <div id="message">${this.message}</div>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult} lit-html template for the cue message a user
+   * should see.
+   */
+  get message() {
+    if (this.cuePrefName === cueNames.CODE_OF_CONDUCT) {
+      return html`
+        Please keep discussions respectful and constructive.
+        See our
+        <a href="${this.codeOfConductUrl}"
+           target="_blank">code of conduct</a>.
+        `;
+    } else if (this.cuePrefName === cueNames.AVAILABILITY_MSGS) {
+      if (this._availablityMsgsRelevant(this.issue)) {
+        return html`
+          <b>Note:</b>
+          Clock icons indicate that users may not be available.
+          Tooltips show the reason.
+          `;
+      }
+    } else if (this.cuePrefName === cueNames.SWITCH_TO_PARENT_ACCOUNT) {
+      if (this._switchToParentAccountRelevant()) {
+        return html`
+          You are signed in to a linked account.
+          <a href="${this.loginUrl}">
+             Switch to ${this.user.linkedParentRef.displayName}</a>.
+          `;
+      }
+    } else if (this.cuePrefName === cueNames.SEARCH_FOR_NUMBERS) {
+      if (this._searchForNumbersRelevant(this.jumpLocalId)) {
+        return html`
+          <b>Tip:</b>
+          To find issues containing "${this.jumpLocalId}", use quotes.
+          `;
+      }
+    }
+    return;
+  }
+
+  /**
+  * Conditionally returns a hardcoded code of conduct URL for
+  * different projects.
+  * @return {string} the URL for the code of conduct.
+   */
+  get codeOfConductUrl() {
+    // TODO(jrobbins): Store this in the DB and pass it via the API.
+    if (this.projectName === 'fuchsia') {
+      return 'https://fuchsia.dev/fuchsia-src/CODE_OF_CONDUCT';
+    }
+    return ('https://chromium.googlesource.com/' +
+            'chromium/src/+/main/CODE_OF_CONDUCT.md');
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    const hiddenWatchProps = ['prefsLoaded', 'cuePrefName', 'signedIn',
+      'prefs'];
+    const shouldUpdateHidden = Array.from(changedProperties.keys())
+        .some((propName) => hiddenWatchProps.includes(propName));
+    if (shouldUpdateHidden) {
+      this.hidden = this._shouldBeHidden(this.signedIn, this.prefsLoaded,
+          this.cuePrefName, this.message);
+    }
+  }
+
+  /**
+   * Checks if there are any unavailable users and only displays this cue if so.
+   * @param {Issue} issue
+   * @return {boolean} Whether the User Availability cue should be
+   *   displayed or not.
+   */
+  _availablityMsgsRelevant(issue) {
+    if (!issue) return false;
+    return (this._anyUnvailable([issue.ownerRef]) ||
+            this._anyUnvailable(issue.ccRefs));
+  }
+
+  /**
+   * Checks if a given list of users contains any unavailable users.
+   * @param {Array<UserRef>} userRefList
+   * @return {boolean} Whether there are unavailable users.
+   */
+  _anyUnvailable(userRefList) {
+    if (!userRefList) return false;
+    for (const userRef of userRefList) {
+      if (userRef) {
+        const participant = this.referencedUsers.get(userRef.displayName);
+        if (participant && participant.availability) return true;
+      }
+    }
+  }
+
+  /**
+   * Finds if the user has a linked parent account that's separate from the
+   * one they are logged into and conditionally hides the cue if so.
+   * @return {boolean} Whether to show the cue to switch to a parent account.
+   */
+  _switchToParentAccountRelevant() {
+    return this.user && this.user.linkedParentRef;
+  }
+
+  /**
+   * Determines whether the user should see a cue telling them how to avoid the
+   * "jump to issue" feature.
+   * @param {number} jumpLocalId the ID of the issue the user jumped to.
+   * @return {boolean} Whether the user jumped to a number or not.
+   */
+  _searchForNumbersRelevant(jumpLocalId) {
+    return !!jumpLocalId;
+  }
+
+  /**
+   * Checks the user's preferences to hide a particular cue if they have
+   * dismissed it.
+   * @param {boolean} signedIn Whether the user is signed in.
+   * @param {boolean} prefsLoaded Whether the user's prefs have been fetched
+   *   from the API.
+   * @param {string} cuePrefName The name of the cue being checked.
+   * @param {string} message
+   * @return {boolean} Whether the cue should be hidden.
+   */
+  _shouldBeHidden(signedIn, prefsLoaded, cuePrefName, message) {
+    if (signedIn && !prefsLoaded) return true;
+    if (this.alreadyDismissed(cuePrefName)) return true;
+    return !message;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.projectName = projectV0.viewedProjectName(state);
+    this.issue = issueV0.viewedIssue(state);
+    this.referencedUsers = issueV0.referencedUsers(state);
+    this.user = userV0.currentUser(state);
+    this.prefs = userV0.prefs(state);
+    this.signedIn = this.user && this.user.userId;
+    this.prefsLoaded = userV0.currentUser(state).prefsLoaded;
+
+    const queryString = window.location.search.substring(1);
+    const queryParams = qs.parse(queryString);
+    const q = queryParams.q;
+    if (q && q.match(new RegExp('^\\d+$'))) {
+      this.jumpLocalId = Number(q);
+    }
+  }
+
+  /**
+   * Check whether a cue has already been dismissed in a user's
+   * preferences.
+   * @param {string} pref The name of the user preference to check.
+   * @return {boolean} Whether the cue was dismissed or not.
+   */
+  alreadyDismissed(pref) {
+    return this.prefs && this.prefs.get(pref);
+  }
+
+  /**
+   * Sends a request to the API to save that a user has dismissed a cue.
+   * The results of this request update Redux's state, which leads to
+   * the cue disappearing for the user after the request finishes.
+   * @return {void}
+   */
+  dismiss() {
+    const newPrefs = [{name: this.cuePrefName, value: 'true'}];
+    store.dispatch(userV0.setPrefs(newPrefs, this.signedIn));
+  }
+}
+
+customElements.define('mr-cue', MrCue);
diff --git a/static_src/elements/help/mr-cue/mr-cue.test.js b/static_src/elements/help/mr-cue/mr-cue.test.js
new file mode 100644
index 0000000..2722076
--- /dev/null
+++ b/static_src/elements/help/mr-cue/mr-cue.test.js
@@ -0,0 +1,177 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrCue} from './mr-cue.js';
+import page from 'page';
+import {rootReducer} from 'reducers/base.js';
+
+let element;
+
+describe('mr-cue', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-cue');
+    document.body.appendChild(element);
+
+    sinon.stub(page, 'call');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    page.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrCue);
+  });
+
+  it('stateChanged', () => {
+    const state = rootReducer({
+      userV0: {currentUser: {prefs: new Map(), prefsLoaded: false}},
+    }, {});
+    element.stateChanged(state);
+    assert.deepEqual(element.prefs, new Map([['render_markdown', false]]));
+    assert.isFalse(element.prefsLoaded);
+  });
+
+  it('cues are hidden before prefs load', () => {
+    element.prefsLoaded = false;
+    assert.isTrue(element.hidden);
+  });
+
+  it('cue is hidden if user already dismissed it', () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'code_of_conduct';
+    element.prefs = new Map([['code_of_conduct', true]]);
+    assert.isTrue(element.hidden);
+  });
+
+  it('cue is hidden if no relevent message', () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'this_has_no_message';
+    assert.isTrue(element.hidden);
+  });
+
+  it('cue is shown if relevant message has not been dismissed', async () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'code_of_conduct';
+
+    await element.updateComplete;
+
+    assert.isFalse(element.hidden);
+    const messageEl = element.shadowRoot.querySelector('#message');
+    assert.include(messageEl.innerHTML, 'chromium.googlesource.com');
+  });
+
+  it('code of conduct is specific to the project', async () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'code_of_conduct';
+    element.projectName = 'fuchsia';
+
+    await element.updateComplete;
+
+    assert.isFalse(element.hidden);
+    const messageEl = element.shadowRoot.querySelector('#message');
+    assert.include(messageEl.innerHTML, 'fuchsia.dev');
+  });
+
+  it('availability cue is hidden if no relevent issue particpants', () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'availability_msgs';
+    element.issue = {summary: 'no owners or cc'};
+    assert.isTrue(element.hidden);
+
+    element.issue = {
+      summary: 'owner and ccs have no availability msg',
+      ownerRef: {},
+      ccRefs: [{}, {}],
+    };
+    assert.isTrue(element.hidden);
+  });
+
+  it('availability cue is shown if issue particpants are unavailable',
+      async () => {
+        element.prefsLoaded = true;
+        element.cuePrefName = 'availability_msgs';
+        element.referencedUsers = new Map([
+          ['user@example.com', {availability: 'Never visited'}],
+        ]);
+
+        element.issue = {
+          summary: 'owner is unavailable',
+          ownerRef: {displayName: 'user@example.com'},
+          ccRefs: [{}, {}],
+        };
+        await element.updateComplete;
+
+        assert.isFalse(element.hidden);
+        const messageEl = element.shadowRoot.querySelector('#message');
+        assert.include(messageEl.innerText, 'Clock icons');
+
+        element.issue = {
+          summary: 'owner is unavailable',
+          ownerRef: {},
+          ccRefs: [
+            {displayName: 'ok@example.com'},
+            {displayName: 'user@example.com'}],
+        };
+        await element.updateComplete;
+        assert.isFalse(element.hidden);
+        assert.include(messageEl.innerText, 'Clock icons');
+      });
+
+  it('switch_to_parent_account cue is hidden if no linked account', () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'switch_to_parent_account';
+
+    element.user = undefined;
+    assert.isTrue(element.hidden);
+
+    element.user = {groups: []};
+    assert.isTrue(element.hidden);
+  });
+
+  it('switch_to_parent_account is shown if user has parent account',
+      async () => {
+        element.prefsLoaded = true;
+        element.cuePrefName = 'switch_to_parent_account';
+        element.user = {linkedParentRef: {displayName: 'parent@example.com'}};
+
+        await element.updateComplete;
+        assert.isFalse(element.hidden);
+        const messageEl = element.shadowRoot.querySelector('#message');
+        assert.include(messageEl.innerText, 'a linked account');
+      });
+
+  it('search_for_numbers cue is hidden if no number was used', () => {
+    element.prefsLoaded = true;
+    element.cuePrefName = 'search_for_numbers';
+    element.issue = {};
+    element.jumpLocalId = null;
+    assert.isTrue(element.hidden);
+  });
+
+  it('search_for_numbers cue is shown if jumped to issue ID',
+      async () => {
+        element.prefsLoaded = true;
+        element.cuePrefName = 'search_for_numbers';
+        element.issue = {};
+        element.jumpLocalId = '123'.match(new RegExp('^\\d+$'));
+
+        await element.updateComplete;
+        assert.isFalse(element.hidden);
+        const messageEl = element.shadowRoot.querySelector('#message');
+        assert.include(messageEl.innerText, 'use quotes');
+      });
+
+  it('cue is dismissible unless there is attribute nondismissible',
+      async () => {
+        assert.isFalse(element.nondismissible);
+
+        element.setAttribute('nondismissible', '');
+        await element.updateComplete;
+        assert.isTrue(element.nondismissible);
+      });
+});
diff --git a/static_src/elements/help/mr-cue/mr-fed-ref-cue.js b/static_src/elements/help/mr-cue/mr-fed-ref-cue.js
new file mode 100644
index 0000000..8e8626f
--- /dev/null
+++ b/static_src/elements/help/mr-cue/mr-fed-ref-cue.js
@@ -0,0 +1,83 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {html, css} from 'lit-element';
+import * as userV0 from 'reducers/userV0.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {store} from 'reducers/base.js';
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {fromShortlink, GoogleIssueTrackerIssue} from 'shared/federated.js';
+import {MrCue} from './mr-cue.js';
+
+/**
+ * `<mr-fed-ref-cue>`
+ *
+ * Displays information and login/logout links for the federated references
+ * info popup.
+ *
+ */
+export class MrFedRefCue extends MrCue {
+  /** @override */
+  static get properties() {
+    return {
+      ...MrCue.properties,
+      fedRefShortlink: {type: String},
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      ...MrCue.styles,
+      css`
+        :host {
+          margin: 0;
+          width: 120px;
+          font-size: 11px;
+        }
+      `,
+    ];
+  }
+
+  get message() {
+    const fedRef = fromShortlink(this.fedRefShortlink);
+    if (fedRef && fedRef instanceof GoogleIssueTrackerIssue) {
+      let authLink;
+      if (this.user && this.user.gapiEmail) {
+        authLink = html`
+          <br /><br />
+          <a href="#"
+            @click=${() => store.dispatch(userV0.initGapiLogout())}
+          >Sign out</a>
+          <br />
+          (for references only)
+        `;
+      } else {
+        const clickLoginHandler = async () => {
+          await store.dispatch(userV0.initGapiLogin(this.issue));
+          // Re-fetch related issues.
+          store.dispatch(issueV0.fetchRelatedIssues(this.issue));
+        };
+        authLink = html`
+          <br /><br />
+          Googlers, to enable viewing status & title,
+          <a href="#"
+            @click=${clickLoginHandler}
+            >sign in here</a> with your Google email.
+        `;
+      }
+      return html`
+        This references an issue in the ${fedRef.trackerName} issue tracker.
+        ${authLink}
+      `;
+    } else {
+      return html`
+        This references an issue in another tracker. Status not displayed.
+      `;
+    }
+  }
+}
+
+customElements.define('mr-fed-ref-cue', MrFedRefCue);
diff --git a/static_src/elements/hotlist/mr-hotlist-header/mr-hotlist-header.js b/static_src/elements/hotlist/mr-hotlist-header/mr-hotlist-header.js
new file mode 100644
index 0000000..b7087a9
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-header/mr-hotlist-header.js
@@ -0,0 +1,72 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import 'elements/framework/mr-tabs/mr-tabs.js';
+
+/** @type {readonly MenuItem[]} */
+const _MENU_ITEMS = Object.freeze([
+  {
+    icon: 'list',
+    text: 'Issues',
+    url: 'issues',
+  },
+  {
+    icon: 'people',
+    text: 'People',
+    url: 'people',
+  },
+  {
+    icon: 'settings',
+    text: 'Settings',
+    url: 'settings',
+  },
+]);
+
+// TODO(dtu): Put this inside <mr-header>. Currently, we can't do this because
+// the sticky table headers rely on having a fixed header height. We need to
+// add a scrolling context to the page in order to have a dynamic-height
+// sticky, and to do that the footer needs to be in the scrolling context. So,
+// the footer needs to be SPA-ified.
+/** Hotlist Issues page */
+export class MrHotlistHeader extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      h1 {
+        font-size: 20px;
+        font-weight: normal;
+        margin: 16px 24px;
+      }
+      nav {
+        border-bottom: solid #ddd 1px;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <nav>
+        <mr-tabs .items=${_MENU_ITEMS} .selected=${this.selected}></mr-tabs>
+      </nav>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      selected: {type: Number},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+    /** @type {number} */
+    this.selected = 0;
+  }
+}
+
+customElements.define('mr-hotlist-header', MrHotlistHeader);
diff --git a/static_src/elements/hotlist/mr-hotlist-header/mr-hotlist-header.test.js b/static_src/elements/hotlist/mr-hotlist-header/mr-hotlist-header.test.js
new file mode 100644
index 0000000..9321d59
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-header/mr-hotlist-header.test.js
@@ -0,0 +1,32 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrHotlistHeader} from './mr-hotlist-header.js';
+
+/** @type {MrHotlistHeader} */
+let element;
+
+describe('mr-hotlist-header', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-header');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrHotlistHeader);
+  });
+
+  it('renders', async () => {
+    element.selected = 2;
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.querySelector('mr-tabs').selected, 2);
+  });
+});
diff --git a/static_src/elements/hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.js b/static_src/elements/hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.js
new file mode 100644
index 0000000..fa76477
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.js
@@ -0,0 +1,361 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {defaultMemoize} from 'reselect';
+
+import {relativeTime}
+  from 'elements/chops/chops-timestamp/chops-timestamp-helpers.js';
+import {issueNameToRef, issueToName, userNameToId}
+  from 'shared/convertersV0.js';
+import {DEFAULT_ISSUE_FIELD_LIST} from 'shared/issue-fields.js';
+
+import {store, connectStore} from 'reducers/base.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import * as ui from 'reducers/ui.js';
+
+import 'elements/chops/chops-filter-chips/chops-filter-chips.js';
+import 'elements/framework/dialogs/mr-change-columns/mr-change-columns.js';
+// eslint-disable-next-line max-len
+import 'elements/framework/dialogs/mr-issue-hotlists-action/mr-move-issue-hotlists-dialog.js';
+// eslint-disable-next-line max-len
+import 'elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.js';
+import 'elements/framework/mr-button-bar/mr-button-bar.js';
+import 'elements/framework/mr-issue-list/mr-issue-list.js';
+import 'elements/hotlist/mr-hotlist-header/mr-hotlist-header.js';
+
+const DEFAULT_HOTLIST_FIELDS = Object.freeze([
+  ...DEFAULT_ISSUE_FIELD_LIST,
+  'Added',
+  'Adder',
+  'Rank',
+]);
+
+/** Hotlist Issues page */
+export class _MrHotlistIssuesPage extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+      }
+      section, p, div {
+        margin: 16px 24px;
+      }
+      div {
+        align-items: center;
+        display: flex;
+      }
+      chops-filter-chips {
+        margin-left: 6px;
+      }
+      mr-button-bar {
+        margin: 16px 24px 8px 24px;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <mr-hotlist-header selected=0></mr-hotlist-header>
+      ${this._renderPage()}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderPage() {
+    if (!this._hotlist) {
+      if (this._fetchError) {
+        return html`<section>${this._fetchError.description}</section>`;
+      } else {
+        return html`<section>Loading...</section>`;
+      }
+    }
+
+    // Memoize the issues passed to <mr-issue-list> so that
+    // out property updates don't cause it to re-render.
+    const items = _filterIssues(this._filter, this._items);
+
+    const allProjectNamesEqual = items.length && items.every(
+        (issue) => issue.projectName === items[0].projectName);
+    const projectName = allProjectNamesEqual ? items[0].projectName : null;
+
+    /** @type {HotlistV0} */
+    // Populates <mr-update-issue-hotlists-dialog>' issueHotlists property.
+    const hotlistV0 = {
+      ownerRef: {userId: userNameToId(this._hotlist.owner)},
+      name: this._hotlist.displayName,
+    };
+
+    const mayEdit = this._permissions.includes(hotlists.ADMINISTER) ||
+                    this._permissions.includes(hotlists.EDIT);
+    // TODO(https://crbug.com/monorail/7776): The UI to allow reranking of
+    // Issues should reflect user permissions.
+
+    return html`
+      <p>${this._hotlist.summary}</p>
+
+      <div>
+        Filter by Status
+        <chops-filter-chips
+            .options=${['Open', 'Closed']}
+            .selected=${this._filter}
+            @change=${this._onFilterChange}
+        ></chops-filter-chips>
+      </div>
+
+      <mr-button-bar .items=${this._buttonBarItems()}></mr-button-bar>
+
+      <mr-issue-list
+        .issues=${items}
+        .projectName=${projectName}
+        .columns=${this._columns}
+        .defaultFields=${DEFAULT_HOTLIST_FIELDS}
+        .extractFieldValues=${this._extractFieldValues.bind(this)}
+        .rerank=${mayEdit ? this._rerankItems.bind(this) : null}
+        ?selectionEnabled=${mayEdit}
+        @selectionChange=${this._onSelectionChange}
+      ></mr-issue-list>
+
+      <mr-change-columns .columns=${this._columns}></mr-change-columns>
+      <mr-update-issue-hotlists-dialog
+        .issueRefs=${this._selected.map(issueNameToRef)}
+        .issueHotlists=${[hotlistV0]}
+        @saveSuccess=${this._handleHotlistSaveSuccess}
+      ></mr-update-issue-hotlists-dialog>
+      <mr-move-issue-hotlists-dialog
+        .issueRefs=${this._selected.map(issueNameToRef)}
+        @saveSuccess=${this._handleHotlistSaveSuccess}
+      ><mr-move-issue-hotlists-dialog>
+    `;
+  }
+
+  /**
+   * @return {Array<MenuItem>}
+   */
+  _buttonBarItems() {
+    if (this._selected.length) {
+      return [
+        {
+          icon: 'remove_circle_outline',
+          text: 'Remove',
+          handler: this._removeItems.bind(this)},
+        {
+          icon: 'edit',
+          text: 'Update',
+          handler: this._openUpdateIssuesHotlistsDialog.bind(this),
+        },
+        {
+          icon: 'forward',
+          text: 'Move to...',
+          handler: this._openMoveToHotlistDialog.bind(this),
+        },
+      ];
+    } else {
+      return [
+        // TODO(dtu): Implement this action.
+        // {icon: 'add', text: 'Add issues'},
+        {
+          icon: 'table_chart',
+          text: 'Change columns',
+          handler: this._openColumnsDialog.bind(this),
+        },
+      ];
+    }
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      // Populated from Redux.
+      _hotlist: {type: Object},
+      _permissions: {type: Array},
+      _items: {type: Array},
+      _columns: {type: Array},
+      _fetchError: {type: Object},
+      _extractFieldValuesFromIssue: {type: Object},
+
+      // Populated from events.
+      _filter: {type: Object},
+      _selected: {type: Array},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+
+    // Populated from Redux.
+    /** @type {?Hotlist} */
+    this._hotlist = null;
+    /** @type {Array<Permission>} */
+    this._permissions = [];
+    /** @type {Array<HotlistIssue>} */
+    this._items = [];
+    /** @type {Array<string>} */
+    this._columns = [];
+    /** @type {?Error} */
+    this._fetchError = null;
+    /**
+     * @param {Issue} _issue
+     * @param {string} _fieldName
+     * @return {Array<string>}
+     */
+    this._extractFieldValuesFromIssue = (_issue, _fieldName) => [];
+
+    // Populated from events.
+    /** @type {Object<string, boolean>} */
+    this._filter = {Open: true};
+    /**
+     * An array of selected Issue Names.
+     * TODO(https://crbug.com/monorail/7440): Update typedef.
+     * @type {Array<string>}
+     */
+    this._selected = [];
+  }
+
+  /**
+   * @param {HotlistIssue} hotlistIssue
+   * @param {string} fieldName
+   * @return {Array<string>}
+   */
+  _extractFieldValues(hotlistIssue, fieldName) {
+    switch (fieldName) {
+      case 'Added':
+        return [relativeTime(new Date(hotlistIssue.createTime))];
+      case 'Adder':
+        return [hotlistIssue.adder.displayName];
+      case 'Rank':
+        return [String(hotlistIssue.rank + 1)];
+      default:
+        return this._extractFieldValuesFromIssue(hotlistIssue, fieldName);
+    }
+  }
+
+  /**
+   * @param {Event} e A change event fired by <chops-filter-chips>.
+   */
+  _onFilterChange(e) {
+    this._filter = e.target.selected;
+  }
+
+  /**
+   * @param {CustomEvent} e A selectionChange event fired by <mr-issue-list>.
+   */
+  _onSelectionChange(e) {
+    this._selected = e.target.selectedIssues.map(issueToName);
+  }
+
+  /** Opens a dialog to change the columns shown in the issue list. */
+  _openColumnsDialog() {
+    this.shadowRoot.querySelector('mr-change-columns').open();
+  }
+
+  /** Handles successfully saved Hotlist changes. */
+  async _handleHotlistSaveSuccess() {}
+
+  /** Removes items from the hotlist, dispatching an action to Redux. */
+  async _removeItems() {}
+
+  /** Opens a dialog to update attached Hotlists for selected Issues. */
+  _openUpdateIssuesHotlistsDialog() {
+    this.shadowRoot.querySelector('mr-update-issue-hotlists-dialog').open();
+  }
+
+  /** Opens a dialog to move selected Issues to desired Hotlist. */
+  _openMoveToHotlistDialog() {
+    this.shadowRoot.querySelector('mr-move-issue-hotlists-dialog').open();
+  }
+  /**
+   * Reranks items in the hotlist, dispatching an action to Redux.
+   * @param {Array<String>} items The names of the HotlistItems to move.
+   * @param {number} index The index to insert the moved items.
+   * @return {Promise<void>}
+   */
+  async _rerankItems(items, index) {}
+};
+
+/** Redux-connected version of _MrHotlistIssuesPage. */
+export class MrHotlistIssuesPage extends connectStore(_MrHotlistIssuesPage) {
+  /** @override */
+  stateChanged(state) {
+    this._hotlist = hotlists.viewedHotlist(state);
+    this._permissions = hotlists.viewedHotlistPermissions(state);
+    this._items = hotlists.viewedHotlistIssues(state);
+    this._columns = hotlists.viewedHotlistColumns(state);
+    this._fetchError = hotlists.requests(state).fetch.error;
+    this._extractFieldValuesFromIssue =
+      projectV0.extractFieldValuesFromIssue(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('_hotlist') && this._hotlist) {
+      const pageTitle = `Issues - ${this._hotlist.displayName}`;
+      store.dispatch(sitewide.setPageTitle(pageTitle));
+      const headerTitle = `Hotlist ${this._hotlist.displayName}`;
+      store.dispatch(sitewide.setHeaderTitle(headerTitle));
+    }
+  }
+
+  /** @override */
+  async _handleHotlistSaveSuccess() {
+    const action = hotlists.fetchItems(this._hotlist.name);
+    await store.dispatch(action);
+    store.dispatch(ui.showSnackbar(ui.snackbarNames.UPDATE_HOTLISTS_SUCCESS,
+        'Hotlists updated.'));
+  }
+
+  /** @override */
+  async _removeItems() {
+    const action = hotlists.removeItems(this._hotlist.name, this._selected);
+    await store.dispatch(action);
+  }
+
+  /** @override */
+  async _rerankItems(items, index) {
+    // The index given from <mr-issue-list> includes only the items shown in
+    // the list and excludes the items that are being moved. So, we need to
+    // count the hidden items.
+    let shownItems = 0;
+    let hiddenItems = 0;
+    for (let i = 0; shownItems < index && i < this._items.length; ++i) {
+      const item = this._items[i];
+      const isShown = _isShown(this._filter, item);
+      if (!isShown) ++hiddenItems;
+      if (isShown && !items.includes(item.name)) ++shownItems;
+    }
+
+    await store.dispatch(hotlists.rerankItems(
+        this._hotlist.name, items, index + hiddenItems));
+  }
+};
+
+const _filterIssues = defaultMemoize(
+    /**
+     * Filters an array of HotlistIssues based on a filter condition. Memoized.
+     * @param {Object<string, boolean>} filter The types of issues to show.
+     * @param {Array<HotlistIssue>} items A HotlistIssue to check.
+     * @return {Array<HotlistIssue>}
+     */
+    (filter, items) => items.filter((item) => _isShown(filter, item)));
+
+/**
+ * Returns true iff the current filter includes the given HotlistIssue.
+ * @param {Object<string, boolean>} filter The types of issues to show.
+ * @param {HotlistIssue} item A HotlistIssue to check.
+ * @return {boolean}
+ */
+function _isShown(filter, item) {
+  return filter.Open && item.statusRef.meansOpen ||
+      filter.Closed && !item.statusRef.meansOpen;
+}
+
+customElements.define('mr-hotlist-issues-page-base', _MrHotlistIssuesPage);
+customElements.define('mr-hotlist-issues-page', MrHotlistIssuesPage);
diff --git a/static_src/elements/hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.test.js b/static_src/elements/hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.test.js
new file mode 100644
index 0000000..a651578
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.test.js
@@ -0,0 +1,338 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {store, resetState} from 'reducers/base.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+import * as example from 'shared/test/constants-hotlists.js';
+import * as exampleIssues from 'shared/test/constants-issueV0.js';
+import * as exampleUsers from 'shared/test/constants-users.js';
+import {PERMISSION_HOTLIST_EDIT} from 'shared/test/constants-permissions.js';
+
+import {MrHotlistIssuesPage} from './mr-hotlist-issues-page.js';
+
+/** @type {MrHotlistIssuesPage} */
+let element;
+
+describe('mr-hotlist-issues-page (unconnected)', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-issues-page-base');
+    element._extractFieldValuesFromIssue =
+      projectV0.extractFieldValuesFromIssue({});
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('shows hotlist fetch error', async () => {
+    element._fetchError = new Error('This is an important error');
+    element._fetchError.description = 'This is an important error';
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'important error');
+  });
+
+  it('shows loading message with null hotlist', async () => {
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'Loading');
+  });
+
+  it('renders hotlist items with one project', async () => {
+    element._hotlist = example.HOTLIST;
+    element._items = [example.HOTLIST_ISSUE];
+    await element.updateComplete;
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    assert.deepEqual(issueList.projectName, 'project-name');
+  });
+
+  it('renders hotlist items with multiple projects', async () => {
+    element._hotlist = example.HOTLIST;
+    element._items = [
+      example.HOTLIST_ISSUE,
+      example.HOTLIST_ISSUE_OTHER_PROJECT,
+    ];
+    await element.updateComplete;
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    assert.isNull(issueList.projectName);
+  });
+
+  it('needs permissions to rerank', async () => {
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    assert.isNull(issueList.rerank);
+
+    element._permissions = [hotlists.EDIT];
+    await element.updateComplete;
+
+    assert.isNotNull(issueList.rerank);
+  });
+
+  it('memoizes issues', async () => {
+    element._hotlist = example.HOTLIST;
+    element._items = [example.HOTLIST_ISSUE];
+    await element.updateComplete;
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    const issues = issueList.issues;
+
+    // Trigger a render without updating the issue list.
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    assert.strictEqual(issues, issueList.issues);
+
+    // Modify the issue list.
+    element._items = [example.HOTLIST_ISSUE];
+    await element.updateComplete;
+
+    assert.notStrictEqual(issues, issueList.issues);
+  });
+
+  it('computes strings for HotlistIssue fields', async () => {
+    const clock = sinon.useFakeTimers(24 * 60 * 60 * 1000);
+
+    try {
+      element._hotlist = example.HOTLIST;
+      element._items = [{
+        ...example.HOTLIST_ISSUE,
+        summary: 'Summary',
+        rank: 52,
+        adder: exampleUsers.USER,
+        createTime: new Date(0).toISOString(),
+      }];
+      element._columns = ['Summary', 'Rank', 'Added', 'Adder'];
+      await element.updateComplete;
+
+      const issueList = element.shadowRoot.querySelector('mr-issue-list');
+      assert.include(issueList.shadowRoot.innerHTML, 'Summary');
+      assert.include(issueList.shadowRoot.innerHTML, '53');
+      assert.include(issueList.shadowRoot.innerHTML, 'a day ago');
+      assert.include(issueList.shadowRoot.innerHTML, exampleUsers.DISPLAY_NAME);
+    } finally {
+      clock.restore();
+    }
+  });
+
+  it('filters and shows closed issues', async () => {
+    element._hotlist = example.HOTLIST;
+    element._items = [example.HOTLIST_ISSUE_CLOSED];
+    await element.updateComplete;
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    assert.equal(issueList.issues.length, 0);
+
+    element.shadowRoot.querySelector('chops-filter-chips').select('Closed');
+    await element.updateComplete;
+
+    assert.isTrue(element._filter.Closed);
+    assert.equal(issueList.issues.length, 1);
+  });
+
+  it('updates button bar on list selection', async () => {
+    element._permissions = PERMISSION_HOTLIST_EDIT;
+    element._hotlist = example.HOTLIST;
+    element._items = [example.HOTLIST_ISSUE];
+    await element.updateComplete;
+
+    const buttonBar = element.shadowRoot.querySelector('mr-button-bar');
+    assert.include(buttonBar.shadowRoot.innerHTML, 'Change columns');
+    assert.notInclude(buttonBar.shadowRoot.innerHTML, 'Remove');
+    assert.notInclude(buttonBar.shadowRoot.innerHTML, 'Update');
+    assert.notInclude(buttonBar.shadowRoot.innerHTML, 'Move to...');
+    assert.deepEqual(element._selected, []);
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    issueList.shadowRoot.querySelector('input').click();
+    await element.updateComplete;
+
+    assert.notInclude(buttonBar.shadowRoot.innerHTML, 'Change columns');
+    assert.include(buttonBar.shadowRoot.innerHTML, 'Remove');
+    assert.include(buttonBar.shadowRoot.innerHTML, 'Update');
+    assert.include(buttonBar.shadowRoot.innerHTML, 'Move to...');
+    assert.deepEqual(element._selected, [exampleIssues.NAME]);
+  });
+
+  it('hides issues checkboxes if the user cannot edit', async () => {
+    element._permissions = [];
+    element._hotlist = example.HOTLIST;
+    element._items = [example.HOTLIST_ISSUE];
+    await element.updateComplete;
+
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+    assert.notInclude(issueList.shadowRoot.innerHTML, 'input');
+  });
+
+  it('opens "Change columns" dialog', async () => {
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    const dialog = element.shadowRoot.querySelector('mr-change-columns');
+    sinon.stub(dialog, 'open');
+    try {
+      element._openColumnsDialog();
+
+      sinon.assert.calledOnce(dialog.open);
+    } finally {
+      dialog.open.restore();
+    }
+  });
+
+  it('opens "Update" dialog', async () => {
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    const dialog = element.shadowRoot.querySelector(
+        'mr-update-issue-hotlists-dialog');
+    sinon.stub(dialog, 'open');
+    try {
+      element._openUpdateIssuesHotlistsDialog();
+
+      sinon.assert.calledOnce(dialog.open);
+    } finally {
+      dialog.open.restore();
+    }
+  });
+
+  it('handles successful save from its update dialog', async () => {
+    sinon.stub(element, '_handleHotlistSaveSuccess');
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    try {
+      const dialog =
+          element.shadowRoot.querySelector('mr-update-issue-hotlists-dialog');
+      dialog.dispatchEvent(new Event('saveSuccess'));
+      sinon.assert.calledOnce(element._handleHotlistSaveSuccess);
+    } finally {
+      element._handleHotlistSaveSuccess.restore();
+    }
+  });
+
+  it('opens "Move to..." dialog', async () => {
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    const dialog = element.shadowRoot.querySelector(
+        'mr-move-issue-hotlists-dialog');
+    sinon.stub(dialog, 'open');
+    try {
+      element._openMoveToHotlistDialog();
+
+      sinon.assert.calledOnce(dialog.open);
+    } finally {
+      dialog.open.restore();
+    }
+  });
+
+  it('handles successful save from its move dialog', async () => {
+    sinon.stub(element, '_handleHotlistSaveSuccess');
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+
+    try {
+      const dialog =
+          element.shadowRoot.querySelector('mr-move-issue-hotlists-dialog');
+      dialog.dispatchEvent(new Event('saveSuccess'));
+      sinon.assert.calledOnce(element._handleHotlistSaveSuccess);
+    } finally {
+      element._handleHotlistSaveSuccess.restore();
+    }
+  });
+});
+
+describe('mr-hotlist-issues-page (connected)', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-issues-page');
+    element._extractFieldValuesFromIssue =
+      projectV0.extractFieldValuesFromIssue({});
+    document.body.appendChild(element);
+
+    // Stop Redux from overriding values being tested.
+    sinon.stub(element, 'stateChanged');
+  });
+
+  afterEach(() => {
+    element.stateChanged.restore();
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrHotlistIssuesPage);
+  });
+
+  it('updates page title and header', async () => {
+    element._hotlist = {...example.HOTLIST, displayName: 'Hotlist-Name'};
+    await element.updateComplete;
+
+    const state = store.getState();
+    assert.deepEqual(sitewide.pageTitle(state), 'Issues - Hotlist-Name');
+    assert.deepEqual(sitewide.headerTitle(state), 'Hotlist Hotlist-Name');
+  });
+
+  it('removes items', () => {
+    element._hotlist = example.HOTLIST;
+    element._selected = [exampleIssues.NAME];
+
+    const removeItems = sinon.spy(hotlists, 'removeItems');
+    try {
+      element._removeItems();
+      sinon.assert.calledWith(removeItems, example.NAME, [exampleIssues.NAME]);
+    } finally {
+      removeItems.restore();
+    }
+  });
+
+  it('fetches a hotlist when handling a successful save', () => {
+    element._hotlist = example.HOTLIST;
+
+    const fetchItems = sinon.spy(hotlists, 'fetchItems');
+    try {
+      element._handleHotlistSaveSuccess();
+      sinon.assert.calledWith(fetchItems, example.NAME);
+    } finally {
+      fetchItems.restore();
+    }
+  });
+
+  it('reranks', () => {
+    element._hotlist = example.HOTLIST;
+    element._items = [
+      example.HOTLIST_ISSUE,
+      example.HOTLIST_ISSUE_CLOSED,
+      example.HOTLIST_ISSUE_OTHER_PROJECT,
+    ];
+
+    const rerankItems = sinon.spy(hotlists, 'rerankItems');
+    try {
+      element._rerankItems([example.HOTLIST_ITEM_NAME], 1);
+
+      sinon.assert.calledWith(
+          rerankItems, example.NAME, [example.HOTLIST_ITEM_NAME], 2);
+    } finally {
+      rerankItems.restore();
+    }
+  });
+});
+
+it('mr-hotlist-issues-page (stateChanged)', () => {
+  // @ts-ignore
+  element = document.createElement('mr-hotlist-issues-page');
+  document.body.appendChild(element);
+  assert.instanceOf(element, MrHotlistIssuesPage);
+  document.body.removeChild(element);
+});
diff --git a/static_src/elements/hotlist/mr-hotlist-people-page/mr-hotlist-people-page.js b/static_src/elements/hotlist/mr-hotlist-people-page/mr-hotlist-people-page.js
new file mode 100644
index 0000000..c317d39
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-people-page/mr-hotlist-people-page.js
@@ -0,0 +1,260 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import debounce from 'debounce';
+import {LitElement, html, css} from 'lit-element';
+
+import {userV3ToRef} from 'shared/convertersV0.js';
+
+import {store, connectStore} from 'reducers/base.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as sitewide from 'reducers/sitewide.js';
+import * as users from 'reducers/users.js';
+
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import 'elements/hotlist/mr-hotlist-header/mr-hotlist-header.js';
+
+/** Hotlist People page */
+class _MrHotlistPeoplePage extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+      }
+      section {
+        margin: 16px 24px;
+      }
+      h2 {
+        font-weight: normal;
+      }
+
+      ul {
+        padding: 0;
+      }
+      li {
+        list-style-type: none;
+      }
+      p, li, form {
+        display: flex;
+      }
+      p, ul, li, form {
+        margin: 12px 0;
+      }
+
+      input {
+        margin-left: -6px;
+        padding: 4px;
+        width: 320px;
+      }
+
+      button {
+        align-items: center;
+        background-color: transparent;
+        border: 0;
+        cursor: pointer;
+        display: inline-flex;
+        margin: 0 4px;
+        padding: 0;
+      }
+      .material-icons {
+        font-size: 18px;
+      }
+
+      .placeholder::before {
+        animation: pulse 1s infinite ease-in-out;
+        border-radius: 3px;
+        content: " ";
+        height: 10px;
+        margin: 4px 0;
+        width: 200px;
+      }
+      @keyframes pulse {
+        0% {background-color: var(--chops-blue-50);}
+        50% {background-color: var(--chops-blue-75);}
+        100% {background-color: var(--chops-blue-50);}
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <mr-hotlist-header selected=1></mr-hotlist-header>
+      ${this._renderPage()}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderPage() {
+    if (this._fetchError) {
+      return html`<section>${this._fetchError.description}</section>`;
+    }
+
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+
+      <section>
+        <h2>Owner</h2>
+        ${this._renderOwner(this._owner)}
+      </section>
+
+      <section>
+        <h2>Editors</h2>
+        ${this._renderEditors(this._editors)}
+
+        ${this._permissions.includes(hotlists.ADMINISTER) ? html`
+          <form @submit=${this._onAddEditors}>
+            <input id="add" placeholder="List of email addresses"></input>
+            <button><i class="material-icons">add</i></button>
+          </form>
+        ` : html``}
+      </section>
+    `;
+  }
+
+  /**
+   * @param {?User} owner
+   * @return {TemplateResult}
+   */
+  _renderOwner(owner) {
+    if (!owner) return html`<p class="placeholder"></p>`;
+    return html`
+      <p><mr-user-link .userRef=${userV3ToRef(owner)}></mr-user-link></p>
+    `;
+  }
+
+  /**
+   * @param {?Array<User>} editors
+   * @return {TemplateResult}
+   */
+  _renderEditors(editors) {
+    if (!editors) return html`<p class="placeholder"></p>`;
+    if (!editors.length) return html`<p>No editors.</p>`;
+
+    return html`
+      <ul>${editors.map((editor) => this._renderEditor(editor))}</ul>
+    `;
+  }
+
+  /**
+   * @param {?User} editor
+   * @return {TemplateResult}
+   */
+  _renderEditor(editor) {
+    if (!editor) return html`<li class="placeholder"></li>`;
+
+    const canRemove = this._permissions.includes(hotlists.ADMINISTER) ||
+        editor.name === this._currentUserName;
+
+    return html`
+      <li>
+        <mr-user-link .userRef=${userV3ToRef(editor)}></mr-user-link>
+        ${canRemove ? html`
+          <button @click=${this._removeEditor.bind(this, editor.name)}>
+            <i class="material-icons">clear</i>
+          </button>
+        ` : html``}
+      </li>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      // Populated from Redux.
+      _hotlist: {type: Object},
+      _owner: {type: Object},
+      _editors: {type: Array},
+      _permissions: {type: Array},
+      _currentUserName: {type: String},
+      _fetchError: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    // Populated from Redux.
+    /** @type {?Hotlist} */ this._hotlist = null;
+    /** @type {?User} */ this._owner = null;
+    /** @type {Array<User>} */ this._editors = null;
+    /** @type {Array<Permission>} */ this._permissions = [];
+    /** @type {?String} */ this._currentUserName = null;
+    /** @type {?Error} */ this._fetchError = null;
+
+    this._debouncedAddEditors = debounce(this._addEditors, 400, true);
+  }
+
+  /** Adds hotlist editors.
+   * @param {Event} event
+   */
+  async _onAddEditors(event) {
+    event.preventDefault();
+
+    const input =
+      /** @type {HTMLInputElement} */ (this.shadowRoot.getElementById('add'));
+    const emails = input.value.split(/[\s,;]/).filter((e) => e);
+    if (!emails.length) return;
+    const editors = emails.map((email) => 'users/' + email);
+    try {
+      await this._debouncedAddEditors(editors);
+      input.value = '';
+    } catch (error) {
+      // The `hotlists.update()` call shows a snackbar on errors.
+    }
+  }
+
+  /** Adds hotlist editors.
+   * @param {Array<string>} editors An Array of User resource names.
+   */
+  async _addEditors(editors) {}
+
+  /**
+   * Removes a hotlist editor.
+   * @param {string} name A User resource name.
+  */
+  async _removeEditor(name) {}
+};
+
+/** Redux-connected version of _MrHotlistPeoplePage. */
+export class MrHotlistPeoplePage extends connectStore(_MrHotlistPeoplePage) {
+  /** @override */
+  stateChanged(state) {
+    this._hotlist = hotlists.viewedHotlist(state);
+    this._owner = hotlists.viewedHotlistOwner(state);
+    this._editors = hotlists.viewedHotlistEditors(state);
+    this._permissions = hotlists.viewedHotlistPermissions(state);
+    this._currentUserName = users.currentUserName(state);
+    this._fetchError = hotlists.requests(state).fetch.error;
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    super.updated(changedProperties);
+
+    if (changedProperties.has('_hotlist') && this._hotlist) {
+      const pageTitle = 'People - ' + this._hotlist.displayName;
+      store.dispatch(sitewide.setPageTitle(pageTitle));
+      const headerTitle = 'Hotlist ' + this._hotlist.displayName;
+      store.dispatch(sitewide.setHeaderTitle(headerTitle));
+    }
+  }
+
+  /** @override */
+  async _addEditors(editors) {
+    await store.dispatch(hotlists.update(this._hotlist.name, {editors}));
+  }
+
+  /** @override */
+  async _removeEditor(name) {
+    await store.dispatch(hotlists.removeEditors(this._hotlist.name, [name]));
+  }
+}
+
+customElements.define('mr-hotlist-people-page-base', _MrHotlistPeoplePage);
+customElements.define('mr-hotlist-people-page', MrHotlistPeoplePage);
diff --git a/static_src/elements/hotlist/mr-hotlist-people-page/mr-hotlist-people-page.test.js b/static_src/elements/hotlist/mr-hotlist-people-page/mr-hotlist-people-page.test.js
new file mode 100644
index 0000000..b7dd6dc
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-people-page/mr-hotlist-people-page.test.js
@@ -0,0 +1,176 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {store, resetState} from 'reducers/base.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+import * as example from 'shared/test/constants-hotlists.js';
+import * as exampleUsers from 'shared/test/constants-users.js';
+
+import {MrHotlistPeoplePage} from './mr-hotlist-people-page.js';
+
+/** @type {MrHotlistPeoplePage} */
+let element;
+
+describe('mr-hotlist-people-page (unconnected)', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-people-page-base');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('shows hotlist fetch error', async () => {
+    element._fetchError = new Error('This is an important error');
+    element._fetchError.description = 'This is an important error';
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'important error');
+  });
+
+  it('renders placeholders with no data', async () => {
+    await element.updateComplete;
+
+    const placeholders = element.shadowRoot.querySelectorAll('.placeholder');
+    assert.equal(placeholders.length, 2);
+  });
+
+  it('renders placeholders with editors list but no user data', async () => {
+    element._editors = [null, null];
+    await element.updateComplete;
+
+    const placeholders = element.shadowRoot.querySelectorAll('.placeholder');
+    assert.equal(placeholders.length, 3);
+  });
+
+  it('renders "No editors"', async () => {
+    element._editors = [];
+    await element.updateComplete;
+
+    assert.include(element.shadowRoot.innerHTML, 'No editors');
+  });
+
+  it('renders hotlist', async () => {
+    element._hotlist = example.HOTLIST;
+    element._owner = exampleUsers.USER;
+    element._editors = [exampleUsers.USER_2];
+    await element.updateComplete;
+  });
+
+  it('shows controls iff user has admin permissions', async () => {
+    element._editors = [exampleUsers.USER_2];
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.querySelectorAll('button').length, 0);
+
+    element._permissions = [hotlists.ADMINISTER];
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.querySelectorAll('button').length, 2);
+  });
+
+  it('shows remove button if user is editing themselves', async () => {
+    element._editors = [exampleUsers.USER, exampleUsers.USER_2];
+    element._currentUserName = exampleUsers.USER_2.name;
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.querySelectorAll('button').length, 1);
+  });
+});
+
+describe('mr-hotlist-people-page (connected)', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-people-page');
+    document.body.appendChild(element);
+
+    // Stop Redux from overriding values being tested.
+    sinon.stub(element, 'stateChanged');
+  });
+
+  afterEach(() => {
+    element.stateChanged.restore();
+    document.body.removeChild(element);
+  });
+
+  it('initializes', async () => {
+    assert.instanceOf(element, MrHotlistPeoplePage);
+  });
+
+  it('updates page title and header', async () => {
+    element._hotlist = {...example.HOTLIST, displayName: 'Hotlist-Name'};
+    await element.updateComplete;
+
+    const state = store.getState();
+    assert.deepEqual(sitewide.pageTitle(state), 'People - Hotlist-Name');
+    assert.deepEqual(sitewide.headerTitle(state), 'Hotlist Hotlist-Name');
+  });
+
+  it('adds editors', async () => {
+    element._hotlist = example.HOTLIST;
+    element._permissions = [hotlists.ADMINISTER];
+    await element.updateComplete;
+
+    const input = /** @type {HTMLInputElement} */
+        (element.shadowRoot.getElementById('add'));
+    input.value = 'test@example.com, test2@example.com';
+
+    const update = sinon.spy(hotlists, 'update');
+    try {
+      await element._onAddEditors(new Event('submit'));
+
+      const editors = ['users/test@example.com', 'users/test2@example.com'];
+      sinon.assert.calledWith(update, example.HOTLIST.name, {editors});
+    } finally {
+      update.restore();
+    }
+  });
+
+  it('_onAddEditors ignores empty input', async () => {
+    element._permissions = [hotlists.ADMINISTER];
+    await element.updateComplete;
+
+    const input = /** @type {HTMLInputElement} */
+        (element.shadowRoot.getElementById('add'));
+    input.value = '  ';
+
+    const update = sinon.spy(hotlists, 'update');
+    try {
+      await element._onAddEditors(new Event('submit'));
+      sinon.assert.notCalled(update);
+    } finally {
+      update.restore();
+    }
+  });
+
+  it('removes editors', async () => {
+    element._hotlist = example.HOTLIST;
+
+    const removeEditors = sinon.spy(hotlists, 'removeEditors');
+    try {
+      await element._removeEditor(exampleUsers.NAME_2);
+
+      sinon.assert.calledWith(
+          removeEditors, example.HOTLIST.name, [exampleUsers.NAME_2]);
+    } finally {
+      removeEditors.restore();
+    }
+  });
+});
+
+it('mr-hotlist-people-page (stateChanged)', () => {
+  // @ts-ignore
+  element = document.createElement('mr-hotlist-people-page');
+  document.body.appendChild(element);
+  assert.instanceOf(element, MrHotlistPeoplePage);
+  document.body.removeChild(element);
+});
diff --git a/static_src/elements/hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.js b/static_src/elements/hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.js
new file mode 100644
index 0000000..4f4d90d
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.js
@@ -0,0 +1,310 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import page from 'page';
+import 'shared/typedef.js';
+import {store, connectStore} from 'reducers/base.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as sitewide from 'reducers/sitewide.js';
+import * as ui from 'reducers/ui.js';
+import * as userV0 from 'reducers/userV0.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/hotlist/mr-hotlist-header/mr-hotlist-header.js';
+
+/**
+ * Supported Hotlist privacy options from feature_objects.proto.
+ * @enum {string}
+ */
+const HotlistPrivacy = {
+  PRIVATE: 'PRIVATE',
+  PUBLIC: 'PUBLIC',
+};
+
+/** Hotlist Settings page */
+class _MrHotlistSettingsPage extends LitElement {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: block;
+        }
+        h2 {
+          font-weight: normal;
+        }
+        section, dl, form {
+          margin: 16px 24px;
+        }
+        dt {
+          font-weight: bold;
+          text-align: right;
+          word-wrap: break-word;
+        }
+        dd {
+          margin-left: 0;
+        }
+        label {
+          display: flex;
+          flex-direction: column;
+        }
+        form input,
+        form select {
+          /* Match minimum size of header. */
+          min-width: 250px;
+        }
+        /* https://material.io/design/layout/responsive-layout-grid.html#breakpoints */
+        @media (min-width: 1024px) {
+          input,
+          select,
+          p,
+          dd {
+            max-width: 750px;
+          }
+        }
+        #save-hotlist {
+          background: var(--chops-primary-button-bg);
+          color: var(--chops-primary-button-color);
+        }
+     `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <mr-hotlist-header selected=2></mr-hotlist-header>
+      ${this._renderPage()}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderPage() {
+    if (!this._hotlist) {
+      if (this._fetchError) {
+        return html`<section>${this._fetchError.description}</section>`;
+      } else {
+        return html`<section>Loading...</section>`;
+      }
+    }
+
+    const defaultColumns = this._hotlist.defaultColumns
+        .map((col) => col.column).join(' ');
+    if (this._permissions.includes(hotlists.ADMINISTER)) {
+      return this._renderEditableForm(defaultColumns);
+    }
+    return this._renderViewOnly(defaultColumns);
+  }
+
+  /**
+   * Render the editable form Settings page.
+   * @param {string} defaultColumns The default columns to be shown.
+   * @return {TemplateResult}
+   */
+  _renderEditableForm(defaultColumns) {
+    return html`
+      <form id="settingsForm" class="input-grid"
+        @change=${this._handleFormChange}>
+        <label>Name</label>
+        <input id="displayName" class="path"
+            value="${this._hotlist.displayName}">
+        <label>Summary</label>
+        <input id="summary" class="path" value="${this._hotlist.summary}">
+        <label>Default Issues columns</label>
+        <input id="defaultColumns" class="path" value="${defaultColumns}">
+        <label>Who can view this hotlist</label>
+        <select id="hotlistPrivacy" class="path">
+          <option
+            value="${HotlistPrivacy.PUBLIC}"
+            ?selected="${this._hotlist.hotlistPrivacy ===
+                        HotlistPrivacy.PUBLIC}">
+            Anyone on the Internet
+          </option>
+          <option
+            value="${HotlistPrivacy.PRIVATE}"
+            ?selected="${this._hotlist.hotlistPrivacy ===
+                        HotlistPrivacy.PRIVATE}">
+            Members only
+          </option>
+        </select>
+        <span><!-- grid spacer --></span>
+        <p>
+          Individual issues in the list can only be seen by users who can
+          normally see them. The privacy status of an issue is considered
+          when it is being displayed (or not displayed) in a hotlist.
+        </p>
+        <span><!-- grid spacer --></span>
+        <div>
+          <chops-button @click=${this._save} id="save-hotlist" disabled>
+            Save hotlist
+          </chops-button>
+          <chops-button @click=${this._delete} id="delete-hotlist">
+            Delete hotlist
+          </chops-button>
+        </div>
+      </form>
+    `;
+  }
+
+  /**
+   * Render the view-only Settings page.
+   * @param {string} defaultColumns The default columns to be shown.
+   * @return {TemplateResult}
+   */
+  _renderViewOnly(defaultColumns) {
+    return html`
+      <dl class="input-grid">
+        <dt>Name</dt>
+        <dd>${this._hotlist.displayName}</dd>
+        <dt>Summary</dt>
+        <dd>${this._hotlist.summary}</dd>
+        <dt>Default Issues columns</dt>
+        <dd>${defaultColumns}</dd>
+        <dt>Who can view this hotlist</dt>
+        <dd>
+          ${this._hotlist.hotlistPrivacy &&
+            this._hotlist.hotlistPrivacy === HotlistPrivacy.PUBLIC ?
+            'Anyone on the Internet' : 'Members only'}
+        </dd>
+        <dt></dt>
+        <dd>
+          Individual issues in the list can only be seen by users who can
+          normally see them. The privacy status of an issue is considered
+          when it is being displayed (or not displayed) in a hotlist.
+        </dd>
+      </dl>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      // Populated from Redux.
+      _hotlist: {type: Object},
+      _permissions: {type: Array},
+      _currentUser: {type: Object},
+      _fetchError: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    // Populated from Redux.
+    /** @type {?Hotlist} */ this._hotlist = null;
+    /** @type {Array<Permission>} */ this._permissions = [];
+    /** @type {UserRef} */ this._currentUser = null;
+    /** @type {?Error} */ this._fetchError = null;
+
+    // Expose page.js for test stubbing.
+    this.page = page;
+  }
+
+  /**
+   * Handles changes to the editable form.
+   * @param {Event} e
+   */
+  _handleFormChange() {
+    const saveButton = this.shadowRoot.getElementById('save-hotlist');
+    if (saveButton.disabled) {
+      saveButton.disabled = false;
+    }
+  }
+
+  /** Saves the hotlist, dispatching an action to Redux. */
+  async _save() {}
+
+  /** Deletes the hotlist, dispatching an action to Redux. */
+  async _delete() {}
+};
+
+/** Redux-connected version of _MrHotlistSettingsPage. */
+export class MrHotlistSettingsPage
+  extends connectStore(_MrHotlistSettingsPage) {
+  /** @override */
+  stateChanged(state) {
+    this._hotlist = hotlists.viewedHotlist(state);
+    this._permissions = hotlists.viewedHotlistPermissions(state);
+    this._currentUser = userV0.currentUser(state);
+    this._fetchError = hotlists.requests(state).fetch.error;
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    super.updated(changedProperties);
+
+    if (changedProperties.has('_hotlist') && this._hotlist) {
+      const pageTitle = 'Settings - ' + this._hotlist.displayName;
+      store.dispatch(sitewide.setPageTitle(pageTitle));
+      const headerTitle = 'Hotlist ' + this._hotlist.displayName;
+      store.dispatch(sitewide.setHeaderTitle(headerTitle));
+    }
+  }
+
+  /** @override */
+  async _save() {
+    const form = this.shadowRoot.getElementById('settingsForm');
+    if (!form) return;
+
+    // TODO(https://crbug.com/monorail/7475): Consider generalizing this logic.
+    const updatedHotlist = /** @type {Hotlist} */({});
+    // These are is an input or select elements.
+    const pathInputs = form.querySelectorAll('.path');
+    pathInputs.forEach((input) => {
+      const path = input.id;
+      const value = /** @type {HTMLInputElement} */(input).value;
+      switch (path) {
+        case 'defaultColumns':
+          const columnsValue = [];
+          value.trim().split(' ').forEach((column) => {
+            if (column) columnsValue.push({column});
+          });
+          if (JSON.stringify(columnsValue) !==
+              JSON.stringify(this._hotlist.defaultColumns)) {
+            updatedHotlist.defaultColumns = columnsValue;
+          }
+          break;
+        default:
+          if (value !== this._hotlist[path]) updatedHotlist[path] = value;
+          break;
+      };
+    });
+
+    const action = hotlists.update(this._hotlist.name, updatedHotlist);
+    await store.dispatch(action);
+    this._showHotlistSavedSnackbar();
+  }
+
+  /**
+   * Shows a snackbar informing the user about their save request.
+   */
+  async _showHotlistSavedSnackbar() {
+    await store.dispatch(ui.showSnackbar(
+        'SNACKBAR_ID_HOTLIST_SETTINGS_UPDATED', 'Hotlist Updated.'));
+  }
+
+  /** @override */
+  async _delete() {
+    if (confirm(
+        'Are you sure you want to delete this hotlist? This cannot be undone.')
+    ) {
+      const action = hotlists.deleteHotlist(this._hotlist.name);
+      await store.dispatch(action);
+
+      // TODO(crbug/monorail/7430): Handle an error and add <chops-snackbar>.
+      // Note that this will redirect regardless of an error.
+      this.page(`/u/${this._currentUser.displayName}/hotlists`);
+    }
+  }
+}
+
+customElements.define('mr-hotlist-settings-page-base', _MrHotlistSettingsPage);
+customElements.define('mr-hotlist-settings-page', MrHotlistSettingsPage);
diff --git a/static_src/elements/hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.test.js b/static_src/elements/hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.test.js
new file mode 100644
index 0000000..987fff2
--- /dev/null
+++ b/static_src/elements/hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.test.js
@@ -0,0 +1,167 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {store, resetState} from 'reducers/base.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+import * as example from 'shared/test/constants-hotlists.js';
+import * as exampleUsers from 'shared/test/constants-users.js';
+
+import {MrHotlistSettingsPage} from './mr-hotlist-settings-page.js';
+
+/** @type {MrHotlistSettingsPage} */
+let element;
+
+describe('mr-hotlist-settings-page (unconnected)', () => {
+  beforeEach(() => {
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-settings-page-base');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('shows hotlist fetch error', async () => {
+    element._fetchError = new Error('This is an important error');
+    element._fetchError.description = 'This is an important error';
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'important error');
+  });
+
+  it('shows loading message with null hotlist', async () => {
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'Loading');
+  });
+
+  it('renders hotlist', async () => {
+    element._hotlist = example.HOTLIST;
+    await element.updateComplete;
+  });
+
+  it('renders a view only hotlist if no permissions', async () => {
+    element._hotlist = {...example.HOTLIST};
+    await element.updateComplete;
+    assert.notInclude(element.shadowRoot.innerHTML, 'form');
+  });
+
+  it('renders an editable hotlist if permission to administer', async () => {
+    element._hotlist = {...example.HOTLIST};
+    element._permissions = [hotlists.ADMINISTER];
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'form');
+  });
+
+  it('renders private hotlist', async () => {
+    element._hotlist = {...example.HOTLIST, hotlistPrivacy: 'PRIVATE'};
+    await element.updateComplete;
+    assert.include(element.shadowRoot.innerHTML, 'Members only');
+  });
+});
+
+describe('mr-hotlist-settings-page (connected)', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+
+    // @ts-ignore
+    element = document.createElement('mr-hotlist-settings-page');
+    document.body.appendChild(element);
+
+    // Stop Redux from overriding values being tested.
+    sinon.stub(element, 'stateChanged');
+  });
+
+  afterEach(() => {
+    element.stateChanged.restore();
+    document.body.removeChild(element);
+  });
+
+  it('updates page title and header', async () => {
+    element._hotlist = {...example.HOTLIST, displayName: 'Hotlist-Name'};
+    await element.updateComplete;
+
+    const state = store.getState();
+    assert.deepEqual(sitewide.pageTitle(state), 'Settings - Hotlist-Name');
+    assert.deepEqual(sitewide.headerTitle(state), 'Hotlist Hotlist-Name');
+  });
+
+  it('deletes hotlist', async () => {
+    element._hotlist = example.HOTLIST;
+    element._permissions = [hotlists.ADMINISTER];
+    element._currentUser = exampleUsers.USER;
+    await element.updateComplete;
+
+    const deleteButton = element.shadowRoot.getElementById('delete-hotlist');
+    assert.isNotNull(deleteButton);
+
+    // Auto confirm deletion of hotlist.
+    const confirmStub = sinon.stub(window, 'confirm');
+    confirmStub.returns(true);
+
+    const pageStub = sinon.stub(element, 'page');
+
+    const deleteHotlist = sinon.spy(hotlists, 'deleteHotlist');
+
+    try {
+      await element._delete();
+
+      sinon.assert.calledWith(deleteHotlist, example.NAME);
+      sinon.assert.calledWith(
+          element.page, `/u/${exampleUsers.DISPLAY_NAME}/hotlists`);
+    } finally {
+      deleteHotlist.restore();
+      pageStub.restore();
+      confirmStub.restore();
+    }
+  });
+
+  it('updates hotlist when there are changes', async () => {
+    element._hotlist = {...example.HOTLIST};
+    element._permissions = [hotlists.ADMINISTER];
+    await element.updateComplete;
+
+    const saveButton = element.shadowRoot.getElementById('save-hotlist');
+    assert.isNotNull(saveButton);
+    assert.isTrue(saveButton.hasAttribute('disabled'));
+
+    const hlist = {
+      displayName: element._hotlist.displayName + 'foo',
+      summary: element._hotlist.summary + 'abc',
+    };
+
+    const summaryInput = element.shadowRoot.getElementById('summary');
+    /** @type {HTMLInputElement} */ (summaryInput).value += 'abc';
+    const nameInput =
+        element.shadowRoot.getElementById('displayName');
+    /** @type {HTMLInputElement} */ (nameInput).value += 'foo';
+
+    await element.shadowRoot.getElementById('settingsForm').dispatchEvent(
+        new Event('change'));
+    assert.isFalse(saveButton.hasAttribute('disabled'));
+
+    const snackbarStub = sinon.stub(element, '_showHotlistSavedSnackbar');
+    const update = sinon.stub(hotlists, 'update').returns(async () => {});
+    try {
+      await element._save();
+      sinon.assert.calledWith(update, example.HOTLIST.name, hlist);
+      sinon.assert.calledOnce(snackbarStub);
+    } finally {
+      update.restore();
+      snackbarStub.restore();
+    }
+  });
+});
+
+it('mr-hotlist-settings-page (stateChanged)', () => {
+  // @ts-ignore
+  element = document.createElement('mr-hotlist-settings-page');
+  document.body.appendChild(element);
+  assert.instanceOf(element, MrHotlistSettingsPage);
+  document.body.removeChild(element);
+});
diff --git a/static_src/elements/issue-detail/dialogs/mr-convert-issue/mr-convert-issue.js b/static_src/elements/issue-detail/dialogs/mr-convert-issue/mr-convert-issue.js
new file mode 100644
index 0000000..8da3083
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-convert-issue/mr-convert-issue.js
@@ -0,0 +1,186 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import 'elements/framework/mr-error/mr-error.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+// TODO(zhangtiff): Make dialog components subclass chops-dialog instead of
+// using slots/containment once we switch to LitElement.
+/**
+ * `<mr-convert-issue>`
+ *
+ * This allows a user to update the structure of an issue to that of
+ * a chosen project template.
+ *
+ */
+export class MrConvertIssue extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        label {
+          font-weight: bold;
+          text-align: right;
+        }
+        form {
+          padding: 1em 8px;
+          display: block;
+          font-size: var(--chops-main-font-size);
+        }
+        textarea {
+          font-family: var(--mr-toggled-font-family);
+          min-height: 80px;
+          border: var(--chops-accessible-border);
+          padding: 0.5em 4px;
+        }
+        .edit-actions {
+          width: 100%;
+          margin: 0.5em 0;
+          text-align: right;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <chops-dialog closeOnOutsideClick>
+        <h3 class="medium-heading">Convert issue to new template structure</h3>
+        <form id="convertIssueForm">
+          <div class="input-grid">
+            <label for="templateInput">Pick a template: </label>
+            <select id="templateInput" @change=${this._templateInputChanged}>
+              <option value="">--Please choose a project template--</option>
+              ${this.projectTemplates.map((projTempl) => html`
+                <option value=${projTempl.templateName}>
+                  ${projTempl.templateName}
+                </option>`)}
+            </select>
+            <label for="commentContent">Comment: </label>
+            <textarea id="commentContent" placeholder="Add a comment"></textarea>
+            <span></span>
+            <chops-checkbox
+              @checked-change=${this._sendEmailChecked}
+              checked=${this.sendEmail}
+            >Send email</chops-checkbox>
+          </div>
+          <mr-error ?hidden=${!this.convertIssueError}>
+            ${this.convertIssueError && this.convertIssueError.description}
+          </mr-error>
+          <div class="edit-actions">
+            <chops-button @click=${this.close} class="de-emphasized discard-button">
+              Discard
+            </chops-button>
+            <chops-button @click=${this.save} class="emphasized" ?disabled=${!this.selectedTemplate}>
+              Convert issue
+            </chops-button>
+          </div>
+        </form>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      convertingIssue: {
+        type: Boolean,
+      },
+      convertIssueError: {
+        type: Object,
+      },
+      issuePermissions: {
+        type: Object,
+      },
+      issueRef: {
+        type: Object,
+      },
+      projectTemplates: {
+        type: Array,
+      },
+      selectedTemplate: {
+        type: String,
+      },
+      sendEmail: {
+        type: Boolean,
+      },
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.convertingIssue = issueV0.requests(state).convert.requesting;
+    this.convertIssueError = issueV0.requests(state).convert.error;
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.issuePermissions = issueV0.permissions(state);
+    this.projectTemplates = projectV0.viewedTemplates(state);
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.selectedTemplate = '';
+    this.sendEmail = true;
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('convertingIssue')) {
+      if (!this.convertingIssue && !this.convertIssueError) {
+        this.close();
+      }
+    }
+  }
+
+  open() {
+    this.reset();
+    const dialog = this.shadowRoot.querySelector('chops-dialog');
+    dialog.open();
+  }
+
+  close() {
+    const dialog = this.shadowRoot.querySelector('chops-dialog');
+    dialog.close();
+  }
+
+  /**
+   * Resets the user's input.
+   */
+  reset() {
+    this.shadowRoot.querySelector('#convertIssueForm').reset();
+  }
+
+  /**
+   * Dispatches a Redux action to convert the issue to a new template.
+   */
+  save() {
+    const commentContent = this.shadowRoot.querySelector('#commentContent');
+    store.dispatch(issueV0.convert(this.issueRef, {
+      templateName: this.selectedTemplate,
+      commentContent: commentContent.value,
+      sendEmail: this.sendEmail,
+    }));
+  }
+
+  _sendEmailChecked(evt) {
+    this.sendEmail = evt.detail.checked;
+  }
+
+  _templateInputChanged() {
+    this.selectedTemplate = this.shadowRoot.querySelector(
+        '#templateInput').value;
+  }
+}
+
+customElements.define('mr-convert-issue', MrConvertIssue);
diff --git a/static_src/elements/issue-detail/dialogs/mr-convert-issue/mr-convert-issue.test.js b/static_src/elements/issue-detail/dialogs/mr-convert-issue/mr-convert-issue.test.js
new file mode 100644
index 0000000..b68e274
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-convert-issue/mr-convert-issue.test.js
@@ -0,0 +1,30 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrConvertIssue} from './mr-convert-issue.js';
+
+let element;
+
+describe('mr-convert-issue', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-convert-issue');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrConvertIssue);
+  });
+
+  it('no template chosen', async () => {
+    await element.updateComplete;
+
+    const buttons = element.shadowRoot.querySelectorAll('chops-button');
+    assert.isTrue(buttons[buttons.length - 1].disabled);
+  });
+});
diff --git a/static_src/elements/issue-detail/dialogs/mr-edit-description/mr-edit-description.js b/static_src/elements/issue-detail/dialogs/mr-edit-description/mr-edit-description.js
new file mode 100644
index 0000000..2a34b8f
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-edit-description/mr-edit-description.js
@@ -0,0 +1,340 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/framework/mr-upload/mr-upload.js';
+import 'elements/framework/mr-error/mr-error.js';
+import {fieldTypes} from 'shared/issue-fields.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import 'elements/chops/chops-checkbox/chops-checkbox.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {SHARED_STYLES, MD_PREVIEW_STYLES, MD_STYLES} from 'shared/shared-styles.js';
+import {commentListToDescriptionList} from 'shared/convertersV0.js';
+import {renderMarkdown, shouldRenderMarkdown} from 'shared/md-helper.js';
+import {unsafeHTML} from 'lit-html/directives/unsafe-html.js';
+
+
+/**
+ * `<mr-edit-description>`
+ *
+ * A dialog to edit descriptions.
+ *
+ */
+export class MrEditDescription extends connectStore(LitElement) {
+  /** @override */
+  constructor() {
+    super();
+    this._editedDescription = '';
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      MD_PREVIEW_STYLES,
+      MD_STYLES,
+      css`
+        chops-dialog {
+          --chops-dialog-width: 800px;
+        }
+        textarea {
+          font-family: var(--mr-toggled-font-family);
+          min-height: 300px;
+          max-height: 500px;
+          border: var(--chops-accessible-border);
+          padding: 0.5em 4px;
+          margin: 0.5em 0;
+        }
+        .attachments {
+          margin: 0.5em 0;
+        }
+        .content {
+          padding: 0.5em 0.5em;
+          width: 100%;
+          box-sizing: border-box;
+        }
+        .edit-controls {
+          display: flex;
+          justify-content: space-between;
+          align-items: center;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <chops-dialog aria-labelledby="editDialogTitle">
+        <h3 id="editDialogTitle" class="medium-heading">
+          Edit ${this._title}
+        </h3>
+        <textarea
+          id="description"
+          class="content"
+          @keyup=${this._setEditedDescription}
+          @change=${this._setEditedDescription}
+          .value=${this._editedDescription}
+        ></textarea>
+        ${this._renderMarkdown ? html`
+          <div class="markdown-preview preview-height-description">
+            <div class="markdown">
+              ${unsafeHTML(renderMarkdown(this._editedDescription))}
+            </div>
+          </div>`: ''}
+        <h3 class="medium-heading">
+          Add attachments
+        </h3>
+        <div class="attachments">
+          ${this._attachments && this._attachments.map((attachment) => html`
+            <label>
+              <chops-checkbox
+                type="checkbox"
+                checked="true"
+                class="kept-attachment"
+                data-attachment-id=${attachment.attachmentId}
+                @checked-change=${this._keptAttachmentIdsChanged}
+              />
+              <a href=${attachment.viewUrl} target="_blank">
+                ${attachment.filename}
+              </a>
+            </label>
+            <br>
+          `)}
+          <mr-upload></mr-upload>
+        </div>
+        <mr-error
+          ?hidden=${!this._attachmentError}
+        >${this._attachmentError}</mr-error>
+        <div class="edit-controls">
+          <chops-checkbox
+            id="sendEmail"
+            ?checked=${this._sendEmail}
+            @checked-change=${this._setSendEmail}
+          >Send email</chops-checkbox>
+          <div>
+            <chops-button id="discard" @click=${this.cancel} class="de-emphasized">
+              Discard
+            </chops-button>
+            <chops-button id="save" @click=${this.save} class="emphasized">
+              Save changes
+            </chops-button>
+          </div>
+        </div>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      commentsByApproval: {type: Array},
+      issueRef: {type: Object},
+      fieldName: {type: String},
+      projectName: {type: String},
+      _attachmentError: {type: String},
+      _attachments: {type: Array},
+      _boldLines: {type: Array},
+      _editedDescription: {type: String},
+      _title: {type: String},
+      _keptAttachmentIds: {type: Object},
+      _sendEmail: {type: Boolean},
+      _prefs: {type: Object},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.commentsByApproval = issueV0.commentsByApprovalName(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.projectName = projectV0.viewedProjectName(state);
+    this._prefs = userV0.prefs(state);
+  }
+
+  /**
+   * Public function to open the issue description editing dialog.
+   * @param {Event} e
+   */
+  async open(e) {
+    await this.updateComplete;
+    this.shadowRoot.querySelector('chops-dialog').open();
+    this.fieldName = e.detail.fieldName;
+    this.reset();
+  }
+
+  /**
+   * Resets edit form.
+   */
+  async reset() {
+    await this.updateComplete;
+    this._attachmentError = '';
+    this._attachments = [];
+    this._boldLines = [];
+    this._keptAttachmentIds = new Set();
+
+    const uploader = this.shadowRoot.querySelector('mr-upload');
+    if (uploader) {
+      uploader.reset();
+    }
+
+    // Sets _editedDescription and _title.
+    this._initializeView(this.commentsByApproval, this.fieldName);
+
+    this.shadowRoot.querySelectorAll('.kept-attachment').forEach((checkbox) => {
+      checkbox.checked = true;
+    });
+    this.shadowRoot.querySelector('#sendEmail').checked = true;
+
+    this._sendEmail = true;
+  }
+
+  /**
+   * Cancels in-flight edit data.
+   */
+  async cancel() {
+    await this.updateComplete;
+    this.shadowRoot.querySelector('chops-dialog').close();
+  }
+
+  /**
+   * Sends the user's edit to Monorail's backend to be saved.
+   */
+  async save() {
+    const commentContent = this._markupNewContent();
+    const sendEmail = this._sendEmail;
+    const keptAttachments = Array.from(this._keptAttachmentIds);
+    const message = {
+      issueRef: this.issueRef,
+      isDescription: true,
+      commentContent,
+      keptAttachments,
+      sendEmail,
+    };
+
+    try {
+      const uploader = this.shadowRoot.querySelector('mr-upload');
+      const uploads = await uploader.loadFiles();
+      if (uploads && uploads.length) {
+        message.uploads = uploads;
+      }
+
+      if (!this.fieldName) {
+        store.dispatch(issueV0.update(message));
+      } else {
+        // This is editing an approval if there is no field name.
+        message.fieldRef = {
+          type: fieldTypes.APPROVAL_TYPE,
+          fieldName: this.fieldName,
+        };
+        store.dispatch(issueV0.updateApproval(message));
+      }
+      this.shadowRoot.querySelector('chops-dialog').close();
+    } catch (e) {
+      this._attachmentError = `Error while loading file for attachment: ${
+        e.message}`;
+    }
+  }
+
+  /**
+   * Getter for checking if the user has Markdown enabled.
+   * @return {boolean} Whether Markdown preview should be rendered or not.
+   */
+   get _renderMarkdown() {
+    const enabled = this._prefs.get('render_markdown');
+    return shouldRenderMarkdown({project: this.projectName, enabled});
+  }
+
+  /**
+   * Event handler for keeping <mr-edit-description>'s copy of
+   * _editedDescription in sync.
+   * @param {Event} e
+   */
+  _setEditedDescription(e) {
+    const target = e.target;
+    this._editedDescription = target.value;
+  }
+
+  /**
+   * Event handler for keeping attachment state in sync.
+   * @param {Event} e
+   */
+  _keptAttachmentIdsChanged(e) {
+    e.target.checked = e.detail.checked;
+    const attachmentId = Number.parseInt(e.target.dataset.attachmentId);
+    if (e.target.checked) {
+      this._keptAttachmentIds.add(attachmentId);
+    } else {
+      this._keptAttachmentIds.delete(attachmentId);
+    }
+  }
+
+  _initializeView(commentsByApproval, fieldName) {
+    this._title = fieldName ? `${fieldName} Survey` : 'Description';
+    const key = fieldName || '';
+    if (!commentsByApproval || !commentsByApproval.has(key)) return;
+    const comments = commentListToDescriptionList(commentsByApproval.get(key));
+
+    const comment = comments[comments.length - 1];
+
+    if (comment.attachments) {
+      this._keptAttachmentIds = new Set(comment.attachments.map(
+          (attachment) => Number.parseInt(attachment.attachmentId)));
+      this._attachments = comment.attachments;
+    }
+
+    this._processRawContent(comment.content);
+  }
+
+  _processRawContent(content) {
+    const chunks = content.trim().split(/(<b>[^<\n]+<\/b>)/m);
+    const boldLines = [];
+    let cleanContent = '';
+    chunks.forEach((chunk) => {
+      if (chunk.startsWith('<b>') && chunk.endsWith('</b>')) {
+        const cleanChunk = chunk.slice(3, -4).trim();
+        cleanContent += cleanChunk;
+        // Don't add whitespace to boldLines.
+        if (/\S/.test(cleanChunk)) {
+          boldLines.push(cleanChunk);
+        }
+      } else {
+        cleanContent += chunk;
+      }
+    });
+
+    this._boldLines = boldLines;
+    this._editedDescription = cleanContent;
+  }
+
+  _markupNewContent() {
+    const lines = this._editedDescription.trim().split('\n');
+    const markedLines = lines.map((line) => {
+      let markedLine = line;
+      const matchingBoldLine = this._boldLines.find(
+          (boldLine) => (line.startsWith(boldLine)));
+      if (matchingBoldLine) {
+        markedLine =
+          `<b>${matchingBoldLine}</b>${line.slice(matchingBoldLine.length)}`;
+      }
+      return markedLine;
+    });
+    return markedLines.join('\n');
+  }
+
+  /**
+   * Event handler for keeping email state in sync.
+   * @param {Event} e
+   */
+  _setSendEmail(e) {
+    this._sendEmail = e.detail.checked;
+  }
+}
+
+customElements.define('mr-edit-description', MrEditDescription);
diff --git a/static_src/elements/issue-detail/dialogs/mr-edit-description/mr-edit-description.test.js b/static_src/elements/issue-detail/dialogs/mr-edit-description/mr-edit-description.test.js
new file mode 100644
index 0000000..e3fe9d2
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-edit-description/mr-edit-description.test.js
@@ -0,0 +1,136 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrEditDescription} from './mr-edit-description.js';
+
+let element;
+
+describe('mr-edit-description', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-edit-description');
+
+    document.body.appendChild(element);
+    element.commentsByApproval = new Map([
+      ['', [
+        {
+          descriptionNum: 1,
+          content: 'first description',
+        },
+        {
+          content: 'first comment',
+        },
+        {
+          descriptionNum: 2,
+          content: '<b>last</b> description',
+        },
+        {
+          content: 'second comment',
+        },
+        {
+          content: 'third comment',
+        },
+      ]], ['foo', [
+        {
+          descriptionNum: 1,
+          content: 'first foo survey',
+          approvalRef: {
+            fieldName: 'foo',
+          },
+        },
+        {
+          descriptionNum: 2,
+          content: 'last foo survey',
+          approvalRef: {
+            fieldName: 'foo',
+          },
+        },
+      ]], ['bar', [
+        {
+          descriptionNum: 1,
+          content: 'bar survey',
+          approvalRef: {
+            fieldName: 'bar',
+          },
+        },
+      ]],
+    ]);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrEditDescription);
+  });
+
+  it('selects last issue description', async () => {
+    element.fieldName = '';
+    element.reset();
+
+    await element.updateComplete;
+
+    assert.equal(element._editedDescription, 'last description');
+    assert.equal(element._title, 'Description');
+  });
+
+  it('selects last survey', async () => {
+    element.fieldName = 'foo';
+    element.reset();
+
+    await element.updateComplete;
+
+    assert.equal(element._editedDescription, 'last foo survey');
+    assert.equal(element._title, 'foo Survey');
+  });
+
+  it('toggle sendEmail', async () => {
+    element.reset();
+    await element.updateComplete;
+
+    const sendEmail = element.shadowRoot.querySelector('#sendEmail');
+
+    await sendEmail.updateComplete;
+
+    sendEmail.click();
+    await element.updateComplete;
+    assert.isFalse(element._sendEmail);
+
+    sendEmail.click();
+    await element.updateComplete;
+    assert.isTrue(element._sendEmail);
+
+    sendEmail.click();
+    await element.updateComplete;
+    assert.isFalse(element._sendEmail);
+  });
+
+  it('renders valid markdown description with preview class', async () => {
+    element.projectName = 'monkeyrail';
+    element._prefs = new Map([['render_markdown', true]]);
+    element.reset();
+
+    element._editedDescription = '# h1';
+
+    await element.updateComplete;
+
+    const previewMarkdown = element.shadowRoot.querySelector('.markdown-preview');
+    assert.isNotNull(previewMarkdown);
+
+    const headerText = previewMarkdown.querySelector('h1').textContent;
+    assert.equal(headerText, 'h1');
+  });
+
+  it('does not show preview when markdown is disabled', async () => {
+    element.projectName = 'disabled_project';
+    element._prefs = new Map([['render_markdown', true]]);
+    element.reset();
+
+    await element.updateComplete;
+
+    const previewMarkdown = element.shadowRoot.querySelector('.markdown-preview');
+    assert.isNull(previewMarkdown);
+  });
+});
diff --git a/static_src/elements/issue-detail/dialogs/mr-move-copy-issue/mr-move-copy-issue.js b/static_src/elements/issue-detail/dialogs/mr-move-copy-issue/mr-move-copy-issue.js
new file mode 100644
index 0000000..e97f203
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-move-copy-issue/mr-move-copy-issue.js
@@ -0,0 +1,129 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import page from 'page';
+import {LitElement, html, css} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import 'elements/framework/mr-autocomplete/mr-autocomplete.js';
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+export class MrMoveCopyIssue extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        .target-project-dialog {
+          display: block;
+          font-size: var(--chops-main-font-size);
+        }
+        .error {
+          max-width: 100%;
+          color: red;
+          margin-bottom: 1em;
+        }
+        .edit-actions {
+          width: 100%;
+          margin: 0.5em 0;
+          text-align: right;
+        }
+        input {
+          box-sizing: border-box;
+          width: 95%;
+          padding: 0.25em 4px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <chops-dialog closeOnOutsideClick>
+        <div class="target-project-dialog">
+          <h3 class="medium-heading">${this._action} issue</h3>
+          <div class="input-grid">
+            <label for="targetProjectInput">Target project:</label>
+            <div>
+              <input id="targetProjectInput" />
+              <mr-autocomplete
+                vocabularyName="project"
+                for="targetProjectInput"
+              ></mr-autocomplete>
+            </div>
+          </div>
+
+          ${this._targetProjectError ? html`
+            <div class="error">
+              ${this._targetProjectError}
+            </div>
+          ` : ''}
+
+          <div class="edit-actions">
+            <chops-button @click=${this.cancel} class="de-emphasized">
+              Cancel
+            </chops-button>
+            <chops-button @click=${this.save} class="emphasized">
+              ${this._action} issue
+            </chops-button>
+          </div>
+        </div>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issueRef: {type: Object},
+      _action: {type: String},
+      _targetProjectError: {type: String},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.issueRef = issueV0.viewedIssueRef(state);
+  }
+
+  open(e) {
+    this.shadowRoot.querySelector('chops-dialog').open();
+    this._action = e.detail.action;
+    this.reset();
+  }
+
+  reset() {
+    this.shadowRoot.querySelector('#targetProjectInput').value = '';
+    this._targetProjectError = '';
+  }
+
+  cancel() {
+    this.shadowRoot.querySelector('chops-dialog').close();
+  }
+
+  save() {
+    const method = this._action + 'Issue';
+    prpcClient.call('monorail.Issues', method, {
+      issueRef: this.issueRef,
+      targetProjectName: this.shadowRoot.querySelector(
+          '#targetProjectInput').value,
+    }).then((response) => {
+      const projectName = response.newIssueRef.projectName;
+      const localId = response.newIssueRef.localId;
+      page(`/p/${projectName}/issues/detail?id=${localId}`);
+      this.cancel();
+    }, (error) => {
+      this._targetProjectError = error;
+    });
+  }
+}
+
+customElements.define('mr-move-copy-issue', MrMoveCopyIssue);
diff --git a/static_src/elements/issue-detail/dialogs/mr-move-copy-issue/mr-move-copy-issue.test.js b/static_src/elements/issue-detail/dialogs/mr-move-copy-issue/mr-move-copy-issue.test.js
new file mode 100644
index 0000000..5fdfb39
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-move-copy-issue/mr-move-copy-issue.test.js
@@ -0,0 +1,23 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrMoveCopyIssue} from './mr-move-copy-issue.js';
+
+let element;
+
+describe('mr-move-copy-issue', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-move-copy-issue');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrMoveCopyIssue);
+  });
+});
diff --git a/static_src/elements/issue-detail/dialogs/mr-related-issues/mr-related-issues.js b/static_src/elements/issue-detail/dialogs/mr-related-issues/mr-related-issues.js
new file mode 100644
index 0000000..e859bef
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-related-issues/mr-related-issues.js
@@ -0,0 +1,316 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import 'elements/framework/links/mr-issue-link/mr-issue-link.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {ISSUE_EDIT_PERMISSION} from 'shared/consts/permissions';
+import {prpcClient} from 'prpc-client-instance.js';
+
+/**
+ * `<mr-related-issues>`
+ *
+ * Component for showing a mini list view of blocking issues to users.
+ */
+export class MrRelatedIssues extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: block;
+          font-size: var(--chops-main-font-size);
+        }
+        table {
+          word-wrap: break-word;
+          width: 100%;
+        }
+        tr {
+          font-weight: normal;
+          text-align: left;
+          margin: 0 auto;
+          padding: 2em 1em;
+          height: 20px;
+        }
+        td {
+          background: #f8f8f8;
+          padding: 4px;
+          padding-left: 8px;
+          text-overflow: ellipsis;
+        }
+        th {
+          text-decoration: none;
+          margin-right: 0;
+          padding-right: 0;
+          padding-left: 8px;
+          white-space: nowrap;
+          background: #e3e9ff;
+          text-align: left;
+          border-right: 1px solid #fff;
+          border-top: 1px solid #fff;
+        }
+        tr.dragged td {
+          background: #eee;
+        }
+        h3.medium-heading {
+          display: flex;
+          justify-content: space-between;
+          align-items: flex-end;
+        }
+        button {
+          background: none;
+          border: none;
+          color: inherit;
+          cursor: pointer;
+          margin: 0;
+          padding: 0;
+        }
+        i.material-icons {
+          font-size: var(--chops-icon-font-size);
+          color: var(--chops-primary-icon-color);
+        }
+        .draggable {
+          cursor: grab;
+        }
+        .error {
+          max-width: 100%;
+          color: red;
+          margin-bottom: 1em;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    const rerankEnabled = (this.issuePermissions ||
+      []).includes(ISSUE_EDIT_PERMISSION);
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <chops-dialog closeOnOutsideClick>
+        <h3 class="medium-heading">
+          <span>Blocked on issues</span>
+          <button aria-label="close" @click=${this.close}>
+            <i class="material-icons">close</i>
+          </button>
+        </h3>
+        ${this.error ? html`
+          <div class="error">${this.error}</div>
+        ` : ''}
+        <table><tbody>
+          <tr>
+            ${rerankEnabled ? html`<th></th>` : ''}
+            ${this.columns.map((column) => html`
+              <th>${column}</th>
+            `)}
+          </tr>
+
+          ${this._renderedRows.map((row, index) => html`
+            <tr
+              class=${index === this.srcIndex ? 'dragged' : ''}
+              draggable=${rerankEnabled && row.draggable}
+              data-index=${index}
+              @dragstart=${this._dragstart}
+              @dragend=${this._dragend}
+              @dragover=${this._dragover}
+              @drop=${this._dragdrop}
+            >
+              ${rerankEnabled ? html`
+                <td>
+                  ${rerankEnabled && row.draggable ? html`
+                    <i class="material-icons draggable">drag_indicator</i>
+                  ` : ''}
+                </td>
+              ` : ''}
+
+              ${row.cells.map((cell) => html`
+                <td>
+                  ${cell.type === 'issue' ? html`
+                    <mr-issue-link
+                      .projectName=${this.issueRef.projectName}
+                      .issue=${cell.issue}
+                    ></mr-issue-link>
+                  ` : ''}
+                  ${cell.type === 'text' ? cell.content : ''}
+                </td>
+              `)}
+            </tr>
+          `)}
+        </tbody></table>
+      </chops-dialog>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      columns: {type: Array},
+      error: {type: String},
+      srcIndex: {type: Number},
+      issueRef: {type: Object},
+      issuePermissions: {type: Array},
+      sortedBlockedOn: {type: Array},
+      _renderedRows: {type: Array},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.issuePermissions = issueV0.permissions(state);
+    this.sortedBlockedOn = issueV0.sortedBlockedOn(state);
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.columns = ['Issue', 'Summary'];
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('sortedBlockedOn')) {
+      this.reset();
+    }
+    super.update(changedProperties);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('issueRef')) {
+      this.close();
+    }
+  }
+
+  get _rows() {
+    const blockedOn = this.sortedBlockedOn;
+    if (!blockedOn) return [];
+    return blockedOn.map((issue) => {
+      const isClosed = issue.statusRef ? !issue.statusRef.meansOpen : false;
+      let summary = issue.summary;
+      if (issue.extIdentifier) {
+        // Some federated references will have summaries.
+        summary = issue.summary || '(not available)';
+      }
+      const row = {
+        // Disallow reranking FedRefs/DanglingIssueRelations.
+        draggable: !isClosed && !issue.extIdentifier,
+        cells: [
+          {
+            type: 'issue',
+            issue: issue,
+            isClosed: Boolean(isClosed),
+          },
+          {
+            type: 'text',
+            content: summary,
+          },
+        ],
+      };
+      return row;
+    });
+  }
+
+  async open() {
+    await this.updateComplete;
+    this.reset();
+    this.shadowRoot.querySelector('chops-dialog').open();
+  }
+
+  close() {
+    this.shadowRoot.querySelector('chops-dialog').close();
+  }
+
+  reset() {
+    this.error = null;
+    this.srcIndex = null;
+    this._renderedRows = this._rows.slice();
+  }
+
+  _dragstart(e) {
+    if (e.currentTarget.draggable) {
+      this.srcIndex = Number(e.currentTarget.dataset.index);
+      e.dataTransfer.setDragImage(new Image(), 0, 0);
+    }
+  }
+
+  _dragover(e) {
+    if (e.currentTarget.draggable && this.srcIndex !== null) {
+      e.preventDefault();
+      const targetIndex = Number(e.currentTarget.dataset.index);
+      this._reorderRows(this.srcIndex, targetIndex);
+      this.srcIndex = targetIndex;
+    }
+  }
+
+  _dragend(e) {
+    if (this.srcIndex !== null) {
+      this.reset();
+    }
+  }
+
+  _dragdrop(e) {
+    if (e.currentTarget.draggable && this.srcIndex !== null) {
+      const src = this._renderedRows[this.srcIndex];
+      if (this.srcIndex > 0) {
+        const target = this._renderedRows[this.srcIndex - 1];
+        const above = false;
+        this._reorderBlockedOn(src, target, above);
+      } else if (this.srcIndex === 0 &&
+                 this._renderedRows[1] && this._renderedRows[1].draggable) {
+        const target = this._renderedRows[1];
+        const above = true;
+        this._reorderBlockedOn(src, target, above);
+      }
+      this.srcIndex = null;
+    }
+  }
+
+  _reorderBlockedOn(srcArg, targetArg, above) {
+    const src = srcArg.cells[0].issue;
+    const target = targetArg.cells[0].issue;
+
+    const reorderRequest = prpcClient.call(
+        'monorail.Issues', 'RerankBlockedOnIssues', {
+          issueRef: this.issueRef,
+          movedRef: {
+            projectName: src.projectName,
+            localId: src.localId,
+          },
+          targetRef: {
+            projectName: target.projectName,
+            localId: target.localId,
+          },
+          splitAbove: above,
+        });
+
+    reorderRequest.then((response) => {
+      store.dispatch(issueV0.fetch(this.issueRef));
+    }, (error) => {
+      this.reset();
+      this.error = error.description;
+    });
+  }
+
+  _reorderRows(srcIndex, toIndex) {
+    if (srcIndex <= toIndex) {
+      this._renderedRows = this._renderedRows.slice(0, srcIndex).concat(
+          this._renderedRows.slice(srcIndex + 1, toIndex + 1),
+          [this._renderedRows[srcIndex]],
+          this._renderedRows.slice(toIndex + 1));
+    } else {
+      this._renderedRows = this._renderedRows.slice(0, toIndex).concat(
+          [this._renderedRows[srcIndex]],
+          this._renderedRows.slice(toIndex, srcIndex),
+          this._renderedRows.slice(srcIndex + 1));
+    }
+  }
+}
+
+customElements.define('mr-related-issues', MrRelatedIssues);
diff --git a/static_src/elements/issue-detail/dialogs/mr-related-issues/mr-related-issues.test.js b/static_src/elements/issue-detail/dialogs/mr-related-issues/mr-related-issues.test.js
new file mode 100644
index 0000000..69ce7ee
--- /dev/null
+++ b/static_src/elements/issue-detail/dialogs/mr-related-issues/mr-related-issues.test.js
@@ -0,0 +1,191 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrRelatedIssues} from './mr-related-issues.js';
+
+
+let element;
+
+describe('mr-related-issues', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-related-issues');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrRelatedIssues);
+  });
+
+  it('dialog closes when issueRef changes', async () => {
+    element.issueRef = {projectName: 'chromium', localId: 22};
+    await element.updateComplete;
+
+    const dialog = element.shadowRoot.querySelector('chops-dialog');
+
+    element.open();
+    await element.updateComplete;
+
+    assert.isTrue(dialog.opened);
+
+    element.issueRef = {projectName: 'chromium', localId: 23};
+    await element.updateComplete;
+
+    assert.isFalse(dialog.opened);
+  });
+
+  it('computes blocked on table rows', () => {
+    element.projectName = 'proj';
+    element.sortedBlockedOn = [
+      {projectName: 'proj', localId: 1, statusRef: {meansOpen: true},
+        summary: 'Issue 1'},
+      {projectName: 'proj', localId: 2, statusRef: {meansOpen: true},
+        summary: 'Issue 2'},
+      {projectName: 'proj', localId: 3,
+        summary: 'Issue 3'},
+      {projectName: 'proj2', localId: 4,
+        summary: 'Issue 4 on another project'},
+      {extIdentifier: 'b/123456', statusRef: {meansOpen: true}},
+      {extIdentifier: 'b/987654', statusRef: {meansOpen: false},
+        summary: 'FedRef with a summary'},
+      {projectName: 'proj', localId: 5, statusRef: {meansOpen: false},
+        summary: 'Issue 5'},
+      {projectName: 'proj2', localId: 6, statusRef: {meansOpen: false},
+        summary: 'Issue 6 on another project'},
+    ];
+    assert.deepEqual(element._rows, [
+      {
+        draggable: true,
+        cells: [
+          {
+            type: 'issue',
+            issue: {projectName: 'proj', localId: 1, statusRef: {meansOpen: true},
+              summary: 'Issue 1'},
+            isClosed: false,
+          },
+          {
+            type: 'text',
+            content: 'Issue 1',
+          },
+        ],
+      },
+      {
+        draggable: true,
+        cells: [
+          {
+            type: 'issue',
+            issue: {projectName: 'proj', localId: 2, statusRef: {meansOpen: true},
+              summary: 'Issue 2'},
+            isClosed: false,
+          },
+          {
+            type: 'text',
+            content: 'Issue 2',
+          },
+        ],
+      },
+      {
+        draggable: true,
+        cells: [
+          {
+            type: 'issue',
+            issue: {projectName: 'proj', localId: 3,
+              summary: 'Issue 3'},
+            isClosed: false,
+          },
+          {
+            type: 'text',
+            content: 'Issue 3',
+          },
+        ],
+      },
+      {
+        draggable: true,
+        cells: [
+          {
+            type: 'issue',
+            issue: {projectName: 'proj2', localId: 4,
+              summary: 'Issue 4 on another project'},
+            isClosed: false,
+          },
+          {
+            type: 'text',
+            content: 'Issue 4 on another project',
+          },
+        ],
+      },
+      {
+        draggable: false,
+        cells: [
+          {
+            type: 'issue',
+            issue: {
+              extIdentifier: 'b/123456',
+              statusRef: {meansOpen: true},
+            },
+            isClosed: false,
+          },
+          {
+            type: 'text',
+            content: '(not available)',
+          },
+        ],
+      },
+      {
+        draggable: false,
+        cells: [
+          {
+            type: 'issue',
+            issue: {
+              extIdentifier: 'b/987654',
+              statusRef: {meansOpen: false},
+              summary: 'FedRef with a summary',
+            },
+            isClosed: true,
+          },
+          {
+            type: 'text',
+            content: 'FedRef with a summary',
+          },
+        ],
+      },
+      {
+        draggable: false,
+        cells: [
+          {
+            type: 'issue',
+            issue: {projectName: 'proj', localId: 5,
+              statusRef: {meansOpen: false},
+              summary: 'Issue 5'},
+            isClosed: true,
+          },
+          {
+            type: 'text',
+            content: 'Issue 5',
+          },
+        ],
+      },
+      {
+        draggable: false,
+        cells: [
+          {
+            type: 'issue',
+            issue: {projectName: 'proj2', localId: 6,
+              statusRef: {meansOpen: false},
+              summary: 'Issue 6 on another project'},
+            isClosed: true,
+          },
+          {
+            type: 'text',
+            content: 'Issue 6 on another project',
+          },
+        ],
+      },
+    ]);
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-field.js b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-field.js
new file mode 100644
index 0000000..18bd963
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-field.js
@@ -0,0 +1,288 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import deepEqual from 'deep-equal';
+import {fieldTypes, EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import {arrayDifference, equalsIgnoreCase} from 'shared/helpers.js';
+import {NON_EDITING_KEY_EVENTS} from 'shared/dom-helpers.js';
+
+import './mr-multi-checkbox.js';
+import 'react/mr-react-autocomplete.tsx';
+
+const AUTOCOMPLETE_INPUT = 'AUTOCOMPLETE_INPUT';
+const CHECKBOX_INPUT = 'CHECKBOX_INPUT';
+const SELECT_INPUT = 'SELECT_INPUT';
+
+/**
+ * `<mr-edit-field>`
+ *
+ * A single edit input for a fieldDef + the values of the field.
+ *
+ */
+export class MrEditField extends LitElement {
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <style>
+        mr-edit-field {
+          display: block;
+        }
+        mr-edit-field[hidden] {
+          display: none;
+        }
+        mr-edit-field input,
+        mr-edit-field select {
+          width: var(--mr-edit-field-width);
+          padding: var(--mr-edit-field-padding);
+        }
+      </style>
+      ${this._renderInput()}
+    `;
+  }
+
+  /**
+   * Renders a single input field.
+   * @return {TemplateResult}
+   */
+  _renderInput() {
+    switch (this._widgetType) {
+      case CHECKBOX_INPUT:
+        return html`
+          <mr-multi-checkbox
+            .options=${this.options}
+            .values=${[...this.values]}
+            @change=${this._changeHandler}
+          ></mr-multi-checkbox>
+        `;
+      case SELECT_INPUT:
+        return html`
+          <select
+            id="${this.label}"
+            class="editSelect"
+            aria-label=${this.name}
+            @change=${this._changeHandler}
+          >
+            <option value="">${EMPTY_FIELD_VALUE}</option>
+            ${this.options.map((option) => html`
+              <option
+                value=${option.optionName}
+                .selected=${this.value === option.optionName}
+              >
+                ${option.optionName}
+                ${option.docstring ? ' = ' + option.docstring : ''}
+              </option>
+            `)}
+          </select>
+        `;
+      case AUTOCOMPLETE_INPUT:
+        return html`
+          <mr-react-autocomplete
+            .label=${this.label}
+            .vocabularyName=${this.acType || ''}
+            .inputType=${this._html5InputType}
+            .fixedValues=${this.derivedValues}
+            .value=${this.multi ? this.values : this.value}
+            .multiple=${this.multi}
+            .onChange=${this._changeHandlerReact.bind(this)}
+          ></mr-react-autocomplete>
+        `;
+      default:
+        return '';
+    }
+  }
+
+
+  /** @override */
+  static get properties() {
+    return {
+      // TODO(zhangtiff): Redesign this a bit so we don't need two separate
+      // ways of specifying "type" for a field. Right now, "type" is mapped to
+      // the Monorail custom field types whereas "acType" includes additional
+      // data types such as components, and labels.
+      // String specifying what kind of autocomplete to add to this field.
+      acType: {type: String},
+      // "type" is based on the various custom field types available in
+      // Monorail.
+      type: {type: String},
+      label: {type: String},
+      multi: {type: Boolean},
+      name: {type: String},
+      // Only used for basic, non-repeated fields.
+      placeholder: {type: String},
+      initialValues: {
+        type: Array,
+        hasChanged(newVal, oldVal) {
+          // Prevent extra recomputations of the same initial value causing
+          // values to be reset.
+          return !deepEqual(newVal, oldVal);
+        },
+      },
+      // The current user-inputted values for a field.
+      values: {type: Array},
+      derivedValues: {type: Array},
+      // For enum fields, the possible options that you have. Each entry is a
+      // label type with an additional optionName field added.
+      options: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.initialValues = [];
+    this.values = [];
+    this.derivedValues = [];
+    this.options = [];
+    this.multi = false;
+
+    this.actType = '';
+    this.placeholder = '';
+    this.type = '';
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('initialValues')) {
+      // Assume we always want to reset the user's input when initial
+      // values change.
+      this.reset();
+    }
+    super.update(changedProperties);
+  }
+
+  /**
+   * @return {string}
+   */
+  get value() {
+    return _getSingleValue(this.values);
+  }
+
+  /**
+   * @return {string}
+   */
+  get _widgetType() {
+    const type = this.type;
+    const multi = this.multi;
+    if (type === fieldTypes.ENUM_TYPE) {
+      if (multi) {
+        return CHECKBOX_INPUT;
+      }
+      return SELECT_INPUT;
+    } else {
+      return AUTOCOMPLETE_INPUT;
+    }
+  }
+
+  /**
+   * @return {string} HTML type for the input.
+   */
+  get _html5InputType() {
+    const type = this.type;
+    if (type === fieldTypes.INT_TYPE) {
+      return 'number';
+    } else if (type === fieldTypes.DATE_TYPE) {
+      return 'date';
+    }
+    return 'text';
+  }
+
+  /**
+   * Reset form values to initial state.
+   */
+  reset() {
+    this.values = _wrapInArray(this.initialValues);
+  }
+
+  /**
+   * Return the values that the user added to this input.
+   * @return {Array<string>}åß
+   */
+  getValuesAdded() {
+    if (!this.values || !this.values.length) return [];
+    return arrayDifference(
+        this.values, this.initialValues, equalsIgnoreCase);
+  }
+
+  /**
+   * Return the values that the userremoved from this input.
+   * @return {Array<string>}
+   */
+  getValuesRemoved() {
+    if (!this.multi && (!this.values || this.values.length > 0)) return [];
+    return arrayDifference(
+        this.initialValues, this.values, equalsIgnoreCase);
+  }
+
+  /**
+   * Syncs form values and fires a change event as the user edits the form.
+   * @param {Event} e
+   * @fires Event#change
+   * @private
+   */
+  _changeHandler(e) {
+    if (e instanceof KeyboardEvent) {
+      if (NON_EDITING_KEY_EVENTS.has(e.key)) return;
+    }
+    const input = e.target;
+
+    if (input.getValues) {
+      // <mr-multi-checkbox> support.
+      this.values = input.getValues();
+    } else {
+      // Is a native input element.
+      const value = input.value.trim();
+      this.values = _wrapInArray(value);
+    }
+
+    this.dispatchEvent(new Event('change'));
+  }
+
+  /**
+   * Syncs form values and fires a change event as the user edits the form.
+   * @param {React.SyntheticEvent} _e
+   * @param {string|Array<string>|null} value React autcoomplete form value.
+   * @fires Event#change
+   * @private
+   */
+  _changeHandlerReact(_e, value) {
+    this.values = _wrapInArray(value);
+
+    this.dispatchEvent(new Event('change'));
+  }
+}
+
+/**
+ * Returns the string value for a single field.
+ * @param {Array<string>} arr
+ * @return {string}
+ */
+function _getSingleValue(arr) {
+  return (arr && arr.length) ? arr[0] : '';
+}
+
+/**
+ * Returns the string value for a single field.
+ * @param {Array<string>|string} v
+ * @return {string}
+ */
+function _wrapInArray(v) {
+  if (!v) return [];
+
+  let values = v;
+  if (!Array.isArray(v)) {
+    values = !!v ? [v] : [];
+  }
+  return [...values];
+}
+
+customElements.define('mr-edit-field', MrEditField);
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-field.test.js b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-field.test.js
new file mode 100644
index 0000000..a718203
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-field.test.js
@@ -0,0 +1,215 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import userEvent from '@testing-library/user-event';
+
+import {MrEditField} from './mr-edit-field.js';
+import {fieldTypes} from 'shared/issue-fields.js';
+
+import {enterInput} from 'shared/test/helpers.js';
+
+
+let element;
+let input;
+
+xdescribe('mr-edit-field', () => {
+  beforeEach(async () => {
+    element = document.createElement('mr-edit-field');
+    document.body.appendChild(element);
+
+    element.label = 'testInput';
+    await element.updateComplete;
+
+    input = element.querySelector('#testInput');
+  });
+
+  afterEach(async () => {
+    userEvent.clear(input);
+
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrEditField);
+  });
+
+  it('reset input value', async () => {
+    element.initialValues = [];
+    await element.updateComplete;
+
+    enterInput(input, 'jackalope');
+    await element.updateComplete;
+
+    assert.equal(element.value, 'jackalope');
+
+    element.reset();
+    await element.updateComplete;
+
+    assert.equal(element.value, '');
+  });
+
+  it('input updates when initialValues change', async () => {
+    element.initialValues = ['hello'];
+
+    await element.updateComplete;
+
+    assert.equal(element.value, 'hello');
+  });
+
+  it('initial value does not change after value set', async () => {
+    element.initialValues = ['hello'];
+    element.label = 'testInput';
+    await element.updateComplete;
+
+    input = element.querySelector('#testInput');
+
+    enterInput(input, 'world');
+    await element.updateComplete;
+
+    assert.deepEqual(element.initialValues, ['hello']);
+    assert.equal(element.value, 'world');
+  });
+
+  it('value updates when input is updated', async () => {
+    element.initialValues = ['hello'];
+    await element.updateComplete;
+
+    enterInput(input, 'world');
+    await element.updateComplete;
+
+    assert.equal(element.value, 'world');
+  });
+
+  it('initial value does not change after user input', async () => {
+    element.initialValues = ['hello'];
+    await element.updateComplete;
+
+    enterInput(input, 'jackalope');
+    await element.updateComplete;
+
+    assert.deepEqual(element.initialValues, ['hello']);
+    assert.equal(element.value, 'jackalope');
+  });
+
+  it('get value after user input', async () => {
+    element.initialValues = ['hello'];
+    await element.updateComplete;
+
+    enterInput(input, 'jackalope');
+    await element.updateComplete;
+
+    assert.equal(element.value, 'jackalope');
+  });
+
+  it('input value was added', async () => {
+    // Simulate user input.
+    await element.updateComplete;
+
+    enterInput(input, 'jackalope');
+    await element.updateComplete;
+
+    assert.deepEqual(element.getValuesAdded(), ['jackalope']);
+    assert.deepEqual(element.getValuesRemoved(), []);
+  });
+
+  it('input value was removed', async () => {
+    await element.updateComplete;
+
+    element.initialValues = ['hello'];
+    await element.updateComplete;
+
+    enterInput(input, '');
+    await element.updateComplete;
+
+    assert.deepEqual(element.getValuesAdded(), []);
+    assert.deepEqual(element.getValuesRemoved(), ['hello']);
+  });
+
+  it('input value was changed', async () => {
+    element.initialValues = ['hello'];
+    await element.updateComplete;
+
+    enterInput(input, 'world');
+    await element.updateComplete;
+
+    assert.deepEqual(element.getValuesAdded(), ['world']);
+  });
+
+  it('edit select updates value when initialValues change', async () => {
+    element.multi = false;
+    element.type = fieldTypes.ENUM_TYPE;
+
+    element.options = [
+      {optionName: 'hello'},
+      {optionName: 'jackalope'},
+      {optionName: 'text'},
+    ];
+
+    element.initialValues = ['hello'];
+
+    await element.updateComplete;
+
+    assert.equal(element.value, 'hello');
+
+    const select = element.querySelector('select');
+    userEvent.selectOptions(select, 'jackalope');
+
+    // User input should not be overridden by the initialValue variable.
+    assert.equal(element.value, 'jackalope');
+    // Initial values should not change based on user input.
+    assert.deepEqual(element.initialValues, ['hello']);
+
+    element.initialValues = ['text'];
+    await element.updateComplete;
+
+    assert.equal(element.value, 'text');
+
+    element.initialValues = [];
+    await element.updateComplete;
+
+    assert.deepEqual(element.value, '');
+  });
+
+  it('multi enum updates value on reset', async () => {
+    element.multi = true;
+    element.type = fieldTypes.ENUM_TYPE;
+    element.options = [
+      {optionName: 'hello'},
+      {optionName: 'world'},
+      {optionName: 'fake'},
+    ];
+
+    await element.updateComplete;
+
+    element.initialValues = ['hello'];
+    element.reset();
+    await element.updateComplete;
+
+    assert.deepEqual(element.values, ['hello']);
+
+    const checkboxes = element.querySelector('mr-multi-checkbox');
+
+    // User checks all boxes.
+    checkboxes._inputRefs.forEach(
+        (checkbox) => {
+          checkbox.checked = true;
+        },
+    );
+    checkboxes._changeHandler();
+
+    await element.updateComplete;
+
+    // User input should not be overridden by the initialValues variable.
+    assert.deepEqual(element.values, ['hello', 'world', 'fake']);
+    // Initial values should not change based on user input.
+    assert.deepEqual(element.initialValues, ['hello']);
+
+    element.initialValues = ['hello', 'world'];
+    element.reset();
+    await element.updateComplete;
+
+    assert.deepEqual(element.values, ['hello', 'world']);
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-status.js b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-status.js
new file mode 100644
index 0000000..5303c57
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-status.js
@@ -0,0 +1,183 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {SHARED_STYLES} from 'shared/shared-styles';
+import './mr-edit-field.js';
+
+/**
+ * `<mr-edit-status>`
+ *
+ * Editing form for either an approval or the overall issue.
+ *
+ */
+export class MrEditStatus extends LitElement {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          width: 100%;
+        }
+        select {
+          width: var(--mr-edit-field-width);
+          padding: var(--mr-edit-field-padding);
+        }
+        .grid-input {
+          margin-top: 8px;
+          display: grid;
+          grid-gap: var(--mr-input-grid-gap);
+          grid-template-columns: auto 1fr;
+        }
+        .grid-input[hidden] {
+          display: none;
+        }
+        label {
+          font-weight: bold;
+          word-wrap: break-word;
+          text-align: left;
+        }
+        #mergedIntoInput {
+          width: 160px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <select
+        @change=${this._selectChangeHandler}
+        aria-label="Status"
+        id="statusInput"
+      >
+        ${this._statusesGrouped.map((group) => html`
+          <optgroup label=${group.name} ?hidden=${!group.name}>
+            ${group.statuses.map((item) => html`
+              <option
+                value=${item.status}
+                .selected=${this.status === item.status}
+              >
+                ${item.status}
+                ${item.docstring ? `= ${item.docstring}` : ''}
+              </option>
+            `)}
+          </optgroup>
+
+          ${!group.name ? html`
+            ${group.statuses.map((item) => html`
+              <option
+                value=${item.status}
+                .selected=${this.status === item.status}
+              >
+                ${item.status}
+                ${item.docstring ? `= ${item.docstring}` : ''}
+              </option>
+            `)}
+          ` : ''}
+        `)}
+      </select>
+
+      <div class="grid-input" ?hidden=${!this._showMergedInto}>
+        <label for="mergedIntoInput" id="mergedIntoLabel">Merged into:</label>
+        <input
+          id="mergedIntoInput"
+          value=${this.mergedInto || ''}
+          @change=${this._changeHandler}
+        ></input>
+      </div>`;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      initialStatus: {type: String},
+      status: {type: String},
+      statuses: {type: Array},
+      isApproval: {type: Boolean},
+      mergedInto: {type: String},
+    };
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('initialStatus')) {
+      this.status = this.initialStatus;
+    }
+    super.update(changedProperties);
+  }
+
+  get _showMergedInto() {
+    const status = this.status || this.initialStatus;
+    return (status === 'Duplicate');
+  }
+
+  get _statusesGrouped() {
+    const statuses = this.statuses;
+    const isApproval = this.isApproval;
+    if (!statuses) return [];
+    if (isApproval) {
+      return [{statuses: statuses}];
+    }
+    return [
+      {
+        name: 'Open',
+        statuses: statuses.filter((s) => s.meansOpen),
+      },
+      {
+        name: 'Closed',
+        statuses: statuses.filter((s) => !s.meansOpen),
+      },
+    ];
+  }
+
+  async reset() {
+    await this.updateComplete;
+    const mergedIntoInput = this.shadowRoot.querySelector('#mergedIntoInput');
+    if (mergedIntoInput) {
+      mergedIntoInput.value = this.mergedInto || '';
+    }
+    this.status = this.initialStatus;
+  }
+
+  get delta() {
+    const result = {};
+
+    if (this.status !== this.initialStatus) {
+      result['status'] = this.status;
+    }
+
+    if (this._showMergedInto) {
+      const newMergedInto = this.shadowRoot.querySelector(
+          '#mergedIntoInput').value;
+      if (newMergedInto !== this.mergedInto) {
+        result['mergedInto'] = newMergedInto;
+      }
+    } else if (this.initialStatus === 'Duplicate') {
+      result['mergedInto'] = '';
+    }
+
+    return result;
+  }
+
+  _selectChangeHandler(e) {
+    const statusInput = e.target;
+    this.status = statusInput.value;
+    this._changeHandler(e);
+  }
+
+  /**
+   * @param {Event} e
+   * @fires CustomEvent#change
+   * @private
+   */
+  _changeHandler(e) {
+    this.dispatchEvent(new CustomEvent('change'));
+  }
+}
+
+customElements.define('mr-edit-status', MrEditStatus);
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-status.test.js b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-status.test.js
new file mode 100644
index 0000000..ffa25e5
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-edit-status.test.js
@@ -0,0 +1,83 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrEditStatus} from './mr-edit-status.js';
+
+
+let element;
+
+describe('mr-edit-status', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-edit-status');
+    element.statuses = [
+      {'status': 'New'},
+      {'status': 'Old'},
+      {'status': 'Duplicate'},
+    ];
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrEditStatus);
+  });
+
+  it('delta empty when no changes', () => {
+    assert.deepEqual(element.delta, {});
+  });
+
+  it('change status', async () => {
+    element.initialStatus = 'New';
+
+    await element.updateComplete;
+
+    const statusInput = element.shadowRoot.querySelector('select');
+    statusInput.value = 'Old';
+    statusInput.dispatchEvent(new Event('change'));
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {status: 'Old'});
+  });
+
+  it('mark as duplicate', async () => {
+    element.initialStatus = 'New';
+
+    await element.updateComplete;
+
+    const statusInput = element.shadowRoot.querySelector('select');
+    statusInput.value = 'Duplicate';
+    statusInput.dispatchEvent(new Event('change'));
+
+    await element.updateComplete;
+
+    element.shadowRoot.querySelector('#mergedIntoInput').value = 'proj:123';
+    assert.deepEqual(element.delta, {
+      status: 'Duplicate',
+      mergedInto: 'proj:123',
+    });
+  });
+
+  it('remove mark as duplicate', async () => {
+    element.initialStatus = 'Duplicate';
+    element.mergedInto = 'chromium:1234';
+
+    await element.updateComplete;
+
+    const statusInput = element.shadowRoot.querySelector('select');
+    statusInput.value = 'New';
+    statusInput.dispatchEvent(new Event('change'));
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      status: 'New',
+      mergedInto: '',
+    });
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-field/mr-multi-checkbox.js b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-multi-checkbox.js
new file mode 100644
index 0000000..881cced
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-multi-checkbox.js
@@ -0,0 +1,96 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<mr-multi-checkbox>`
+ *
+ * A web component for managing values in a set of checkboxes.
+ *
+ */
+export class MrMultiCheckbox extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      input[type="checkbox"] {
+        width: auto;
+        height: auto;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      ${this.options.map((option) => html`
+        <label title=${option.docstring}>
+          <input
+            type="checkbox"
+            name=${this.name}
+            value=${option.optionName}
+            ?checked=${this.values.includes(option.optionName)}
+            @change=${this._changeHandler}
+          />
+          ${option.optionName}
+        </label>
+      `)}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      values: {type: Array},
+      options: {type: Array},
+      _inputRefs: {type: Object},
+    };
+  }
+
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('options')) {
+      this._inputRefs = this.shadowRoot.querySelectorAll('input');
+    }
+
+    if (changedProperties.has('values')) {
+      this.reset();
+    }
+  }
+
+  reset() {
+    this.setValues(this.values);
+  }
+
+  getValues() {
+    if (!this._inputRefs) return;
+    const valueList = [];
+    this._inputRefs.forEach((c) => {
+      if (c.checked) {
+        valueList.push(c.value.trim());
+      }
+    });
+    return valueList;
+  }
+
+  setValues(values) {
+    if (!this._inputRefs) return;
+    this._inputRefs.forEach(
+        (checkbox) => {
+          checkbox.checked = values.includes(checkbox.value);
+        },
+    );
+  }
+
+  /**
+   * @fires CustomEvent#change
+   * @private
+   */
+  _changeHandler() {
+    this.dispatchEvent(new CustomEvent('change'));
+  }
+}
+
+customElements.define('mr-multi-checkbox', MrMultiCheckbox);
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-field/mr-multi-checkbox.test.js b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-multi-checkbox.test.js
new file mode 100644
index 0000000..33cce9e
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-field/mr-multi-checkbox.test.js
@@ -0,0 +1,23 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrMultiCheckbox} from './mr-multi-checkbox.js';
+
+let element;
+
+describe('mr-multi-checkbox', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-multi-checkbox');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrMultiCheckbox);
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-issue.js b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-issue.js
new file mode 100644
index 0000000..69ef43f
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-issue.js
@@ -0,0 +1,360 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+import debounce from 'debounce';
+
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as ui from 'reducers/ui.js';
+import {arrayToEnglish} from 'shared/helpers.js';
+import './mr-edit-metadata.js';
+import 'shared/typedef.js';
+
+import ClientLogger from 'monitoring/client-logger.js';
+
+const DEBOUNCED_PRESUBMIT_TIME_OUT = 400;
+
+/**
+ * `<mr-edit-issue>`
+ *
+ * Edit form for a single issue. Wraps <mr-edit-metadata>.
+ *
+ */
+export class MrEditIssue extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    const issue = this.issue || {};
+    let blockedOnRefs = issue.blockedOnIssueRefs || [];
+    if (issue.danglingBlockedOnRefs && issue.danglingBlockedOnRefs.length) {
+      blockedOnRefs = blockedOnRefs.concat(issue.danglingBlockedOnRefs);
+    }
+
+    let blockingRefs = issue.blockingIssueRefs || [];
+    if (issue.danglingBlockingRefs && issue.danglingBlockingRefs.length) {
+      blockingRefs = blockingRefs.concat(issue.danglingBlockingRefs);
+    }
+
+    return html`
+      <h2 id="makechanges" class="medium-heading">
+        <a href="#makechanges">Add a comment and make changes</a>
+      </h2>
+      <mr-edit-metadata
+        formName="Issue Edit"
+        .ownerName=${this._ownerDisplayName(this.issue.ownerRef)}
+        .cc=${issue.ccRefs}
+        .status=${issue.statusRef && issue.statusRef.status}
+        .statuses=${this._availableStatuses(this.projectConfig.statusDefs, this.issue.statusRef)}
+        .summary=${issue.summary}
+        .components=${issue.componentRefs}
+        .fieldDefs=${this._fieldDefs}
+        .fieldValues=${issue.fieldValues}
+        .blockedOn=${blockedOnRefs}
+        .blocking=${blockingRefs}
+        .mergedInto=${issue.mergedIntoIssueRef}
+        .labelNames=${this._labelNames}
+        .derivedLabels=${this._derivedLabels}
+        .error=${this.updateError}
+        ?saving=${this.updatingIssue}
+        @save=${this.save}
+        @discard=${this.reset}
+        @change=${this._onChange}
+      ></mr-edit-metadata>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * All comments, including descriptions.
+       */
+      comments: {
+        type: Array,
+      },
+      /**
+       * The issue being updated.
+       */
+      issue: {
+        type: Object,
+      },
+      /**
+       * The issueRef for the currently viewed issue.
+       */
+      issueRef: {
+        type: Object,
+      },
+      /**
+       * The config of the currently viewed project.
+       */
+      projectConfig: {
+        type: Object,
+      },
+      /**
+       * Whether the issue is currently being updated.
+       */
+      updatingIssue: {
+        type: Boolean,
+      },
+      /**
+       * An error response, if one exists.
+       */
+      updateError: {
+        type: String,
+      },
+      /**
+       * Hash from the URL, used to support the 'r' hot key for making changes.
+       */
+      focusId: {
+        type: String,
+      },
+      _fieldDefs: {
+        type: Array,
+      },
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.clientLogger = new ClientLogger('issues');
+    this.updateError = '';
+
+    this.presubmitDebounceTimeOut = DEBOUNCED_PRESUBMIT_TIME_OUT;
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    // Prevent debounced logic from running after the component has been
+    // removed from the UI.
+    if (this._debouncedPresubmit) {
+      this._debouncedPresubmit.clear();
+    }
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.issue = issueV0.viewedIssue(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.comments = issueV0.comments(state);
+    this.projectConfig = projectV0.viewedConfig(state);
+    this.updatingIssue = issueV0.requests(state).update.requesting;
+
+    const error = issueV0.requests(state).update.error;
+    this.updateError = error && (error.description || error.message);
+    this.focusId = ui.focusId(state);
+    this._fieldDefs = issueV0.fieldDefs(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (this.focusId && changedProperties.has('focusId')) {
+      // TODO(zhangtiff): Generalize logic to focus elements based on ID
+      // to a reuseable class mixin.
+      if (this.focusId.toLowerCase() === 'makechanges') {
+        this.focus();
+      }
+    }
+
+    if (changedProperties.has('updatingIssue')) {
+      const isUpdating = this.updatingIssue;
+      const wasUpdating = changedProperties.get('updatingIssue');
+
+      // When an issue finishes updating, we want to show a snackbar, record
+      // issue update time metrics, and reset the edit form.
+      if (!isUpdating && wasUpdating) {
+        if (!this.updateError) {
+          this._showCommentAddedSnackbar();
+          // Reset the edit form when a user's action finishes.
+          this.reset();
+        }
+
+        // Record metrics on when the issue editing event finished.
+        if (this.clientLogger.started('issue-update')) {
+          this.clientLogger.logEnd('issue-update', 'computer-time', 120 * 1000);
+        }
+      }
+    }
+  }
+
+  // TODO(crbug.com/monorail/6933): Remove the need for this wrapper.
+  /**
+   * Snows a snackbar telling the user they added a comment to the issue.
+   */
+  _showCommentAddedSnackbar() {
+    store.dispatch(ui.showSnackbar(ui.snackbarNames.ISSUE_COMMENT_ADDED,
+        'Your comment was added.'));
+  }
+
+  /**
+   * Resets all form fields to their initial values.
+   */
+  reset() {
+    const form = this.querySelector('mr-edit-metadata');
+    if (!form) return;
+    form.reset();
+  }
+
+  /**
+   * Dispatches an action to save issue changes on the server.
+   */
+  async save() {
+    const form = this.querySelector('mr-edit-metadata');
+    if (!form) return;
+
+    const delta = form.delta;
+    if (!allowRemovedRestrictions(delta.labelRefsRemove)) {
+      return;
+    }
+
+    const message = {
+      issueRef: this.issueRef,
+      delta: delta,
+      commentContent: form.getCommentContent(),
+      sendEmail: form.sendEmail,
+    };
+
+    // Add files to message.
+    const uploads = await form.getAttachments();
+
+    if (uploads && uploads.length) {
+      message.uploads = uploads;
+    }
+
+    if (message.commentContent || message.delta || message.uploads) {
+      this.clientLogger.logStart('issue-update', 'computer-time');
+
+      store.dispatch(issueV0.update(message));
+    }
+  }
+
+  /**
+   * Focuses the edit form in response to the 'r' hotkey.
+   */
+  focus() {
+    const editHeader = this.querySelector('#makechanges');
+    editHeader.scrollIntoView();
+
+    const editForm = this.querySelector('mr-edit-metadata');
+    editForm.focus();
+  }
+
+  /**
+   * Turns all LabelRef Objects attached to an issue into an Array of strings
+   * containing only the names of those labels that aren't derived.
+   * @return {Array<string>} Array of label names.
+   */
+  get _labelNames() {
+    if (!this.issue || !this.issue.labelRefs) return [];
+    const labels = this.issue.labelRefs;
+    return labels.filter((l) => !l.isDerived).map((l) => l.label);
+  }
+
+  /**
+   * Finds only the derived labels attached to an issue and returns only
+   * their names.
+   * @return {Array<string>} Array of label names.
+   */
+  get _derivedLabels() {
+    if (!this.issue || !this.issue.labelRefs) return [];
+    const labels = this.issue.labelRefs;
+    return labels.filter((l) => l.isDerived).map((l) => l.label);
+  }
+
+  /**
+   * Gets the displayName of the owner. Only uses the displayName if a
+   * userId also exists in the ref.
+   * @param {UserRef} ownerRef The owner of the issue.
+   * @return {string} The name of the owner for the edited issue.
+   */
+  _ownerDisplayName(ownerRef) {
+    return (ownerRef && ownerRef.userId) ? ownerRef.displayName : '';
+  }
+
+  /**
+   * Dispatches an action against the server to run "issue presubmit", a feature
+   * that warns the user about issue changes that violate configured rules.
+   * @param {Object=} issueDelta Changes currently present in the edit form.
+   * @param {string} commentContent Text the user is inputting for a comment.
+   */
+  _presubmitIssue(issueDelta = {}, commentContent) {
+    // Don't run this functionality if the element has disconnected. Important
+    // for preventing debounced code from running after an element no longer
+    // exists.
+    if (!this.isConnected) return;
+
+    if (Object.keys(issueDelta).length || commentContent) {
+      // TODO(crbug.com/monorail/8638): Make filter rules actually process
+      // the text for comments on the backend.
+      store.dispatch(issueV0.presubmit(this.issueRef, issueDelta));
+    }
+  }
+
+  /**
+   * Form change handler that runs presubmit on the form.
+   * @param {CustomEvent} evt
+   */
+  _onChange(evt) {
+    const {delta, commentContent} = evt.detail || {};
+
+    if (!this._debouncedPresubmit) {
+      this._debouncedPresubmit = debounce(
+          (delta, commentContent) => this._presubmitIssue(delta, commentContent),
+          this.presubmitDebounceTimeOut);
+    }
+    this._debouncedPresubmit(delta, commentContent);
+  }
+
+  /**
+   * Creates the list of statuses that the user sees in the status dropdown.
+   * @param {Array<StatusDef>} statusDefsArg The project configured StatusDefs.
+   * @param {StatusRef} currentStatusRef The status that the issue currently
+   *   uses. Note that Monorail supports free text statuses that do not exist in
+   *   a project config. Because of this, currentStatusRef may not exist in
+   *   statusDefsArg.
+   * @return {Array<StatusRef|StatusDef>} Array of statuses a user can edit this
+   *   issue to have.
+   */
+  _availableStatuses(statusDefsArg, currentStatusRef) {
+    let statusDefs = statusDefsArg || [];
+    statusDefs = statusDefs.filter((status) => !status.deprecated);
+    if (!currentStatusRef || statusDefs.find(
+        (status) => status.status === currentStatusRef.status)) {
+      return statusDefs;
+    }
+    return [currentStatusRef, ...statusDefs];
+  }
+}
+
+/**
+ * Asks the user for confirmation when they try to remove retriction labels.
+ * eg. Restrict-View-Google.
+ * @param {Array<LabelRef>} labelRefsRemoved The labels a user is removing
+ *   from this issue.
+ * @return {boolean} Whether removing these labels is okay. ie: true if there
+ *   are either no restrictions being removed or if the user approved the
+ *   removal of the restrictions.
+ */
+export function allowRemovedRestrictions(labelRefsRemoved) {
+  if (!labelRefsRemoved) return true;
+  const removedRestrictions = labelRefsRemoved
+      .map(({label}) => label)
+      .filter((label) => label.toLowerCase().startsWith('restrict-'));
+  const removeRestrictionsMessage =
+    'You are removing these restrictions:\n' +
+    arrayToEnglish(removedRestrictions) + '\n' +
+    'This might allow more people to access this issue. Are you sure?';
+  return !removedRestrictions.length || confirm(removeRestrictionsMessage);
+}
+
+customElements.define('mr-edit-issue', MrEditIssue);
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-issue.test.js b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-issue.test.js
new file mode 100644
index 0000000..a3216ca
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-issue.test.js
@@ -0,0 +1,298 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import sinon from 'sinon';
+import {assert} from 'chai';
+import {prpcClient} from 'prpc-client-instance.js';
+import {MrEditIssue, allowRemovedRestrictions} from './mr-edit-issue.js';
+import {clientLoggerFake} from 'shared/test/fakes.js';
+
+let element;
+let clock;
+
+describe('mr-edit-issue', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-edit-issue');
+    document.body.appendChild(element);
+    sinon.stub(prpcClient, 'call');
+
+    element.clientLogger = clientLoggerFake();
+    clock = sinon.useFakeTimers();
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    prpcClient.call.restore();
+
+    clock.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrEditIssue);
+  });
+
+  it('scrolls into view on #makechanges hash', async () => {
+    await element.updateComplete;
+
+    const header = element.querySelector('#makechanges');
+    sinon.stub(header, 'scrollIntoView');
+
+    element.focusId = 'makechanges';
+    await element.updateComplete;
+
+    assert.isTrue(header.scrollIntoView.calledOnce);
+
+    header.scrollIntoView.restore();
+  });
+
+  it('shows snackbar and resets form when editing finishes', async () => {
+    sinon.stub(element, 'reset');
+    sinon.stub(element, '_showCommentAddedSnackbar');
+
+    element.updatingIssue = true;
+    await element.updateComplete;
+
+    sinon.assert.notCalled(element._showCommentAddedSnackbar);
+    sinon.assert.notCalled(element.reset);
+
+    element.updatingIssue = false;
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element._showCommentAddedSnackbar);
+    sinon.assert.calledOnce(element.reset);
+  });
+
+  it('does not show snackbar or reset form on edit error', async () => {
+    sinon.stub(element, 'reset');
+    sinon.stub(element, '_showCommentAddedSnackbar');
+
+    element.updatingIssue = true;
+    await element.updateComplete;
+
+    element.updateError = 'The save failed';
+    element.updatingIssue = false;
+    await element.updateComplete;
+
+    sinon.assert.notCalled(element._showCommentAddedSnackbar);
+    sinon.assert.notCalled(element.reset);
+  });
+
+  it('shows current status even if not defined for project', async () => {
+    await element.updateComplete;
+
+    const editMetadata = element.querySelector('mr-edit-metadata');
+    assert.deepEqual(editMetadata.statuses, []);
+
+    element.projectConfig = {statusDefs: [
+      {status: 'hello'},
+      {status: 'world'},
+    ]};
+
+    await editMetadata.updateComplete;
+
+    assert.deepEqual(editMetadata.statuses, [
+      {status: 'hello'},
+      {status: 'world'},
+    ]);
+
+    element.issue = {
+      statusRef: {status: 'hello'},
+    };
+
+    await editMetadata.updateComplete;
+
+    assert.deepEqual(editMetadata.statuses, [
+      {status: 'hello'},
+      {status: 'world'},
+    ]);
+
+    element.issue = {
+      statusRef: {status: 'weirdStatus'},
+    };
+
+    await editMetadata.updateComplete;
+
+    assert.deepEqual(editMetadata.statuses, [
+      {status: 'weirdStatus'},
+      {status: 'hello'},
+      {status: 'world'},
+    ]);
+  });
+
+  it('ignores deprecated statuses, unless used on current issue', async () => {
+    await element.updateComplete;
+
+    const editMetadata = element.querySelector('mr-edit-metadata');
+    assert.deepEqual(editMetadata.statuses, []);
+
+    element.projectConfig = {statusDefs: [
+      {status: 'new'},
+      {status: 'accepted', deprecated: false},
+      {status: 'compiling', deprecated: true},
+    ]};
+
+    await editMetadata.updateComplete;
+
+    assert.deepEqual(editMetadata.statuses, [
+      {status: 'new'},
+      {status: 'accepted', deprecated: false},
+    ]);
+
+
+    element.issue = {
+      statusRef: {status: 'compiling'},
+    };
+
+    await editMetadata.updateComplete;
+
+    assert.deepEqual(editMetadata.statuses, [
+      {status: 'compiling'},
+      {status: 'new'},
+      {status: 'accepted', deprecated: false},
+    ]);
+  });
+
+  it('filter out empty or deleted user owners', () => {
+    assert.equal(
+        element._ownerDisplayName({displayName: 'a_deleted_user'}),
+        '');
+    assert.equal(
+        element._ownerDisplayName({
+          displayName: 'test@example.com',
+          userId: '1234',
+        }),
+        'test@example.com');
+  });
+
+  it('logs issue-update metrics', async () => {
+    await element.updateComplete;
+
+    const editMetadata = element.querySelector('mr-edit-metadata');
+
+    sinon.stub(editMetadata, 'delta').get(() => ({summary: 'test'}));
+
+    await element.save();
+
+    sinon.assert.calledOnce(element.clientLogger.logStart);
+    sinon.assert.calledWith(element.clientLogger.logStart,
+        'issue-update', 'computer-time');
+
+    // Simulate a response updating the UI.
+    element.issue = {summary: 'test'};
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(element.clientLogger.logEnd);
+    sinon.assert.calledWith(element.clientLogger.logEnd,
+        'issue-update', 'computer-time', 120 * 1000);
+  });
+
+  it('presubmits issue on metadata change', async () => {
+    element.issueRef = {};
+
+    await element.updateComplete;
+    const editMetadata = element.querySelector('mr-edit-metadata');
+    editMetadata.dispatchEvent(new CustomEvent('change', {
+      detail: {
+        delta: {
+          summary: 'Summary',
+        },
+      },
+    }));
+
+    // Wait for debouncer.
+    clock.tick(element.presubmitDebounceTimeOut + 1);
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Issues',
+        'PresubmitIssue',
+        {issueDelta: {summary: 'Summary'}, issueRef: {}});
+  });
+
+  it('presubmits issue on comment change', async () => {
+    element.issueRef = {};
+
+    await element.updateComplete;
+    const editMetadata = element.querySelector('mr-edit-metadata');
+    editMetadata.dispatchEvent(new CustomEvent('change', {
+      detail: {
+        delta: {},
+        commentContent: 'test',
+      },
+    }));
+
+    // Wait for debouncer.
+    clock.tick(element.presubmitDebounceTimeOut + 1);
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Issues',
+        'PresubmitIssue',
+        {issueDelta: {}, issueRef: {}});
+  });
+
+
+  it('does not presubmit issue when no changes', () => {
+    element._presubmitIssue({});
+
+    sinon.assert.notCalled(prpcClient.call);
+  });
+
+  it('editing form runs _presubmitIssue debounced', async () => {
+    sinon.stub(element, '_presubmitIssue');
+
+    await element.updateComplete;
+
+    // User makes some changes.
+    const comment = element.querySelector('#commentText');
+    comment.value = 'Value';
+    comment.dispatchEvent(new Event('keyup'));
+
+    clock.tick(5);
+
+    // User makes more changes before debouncer timeout is done.
+    comment.value = 'more changes';
+    comment.dispatchEvent(new Event('keyup'));
+
+    clock.tick(10);
+
+    sinon.assert.notCalled(element._presubmitIssue);
+
+    // Wait for debouncer.
+    clock.tick(element.presubmitDebounceTimeOut + 1);
+
+    sinon.assert.calledOnce(element._presubmitIssue);
+  });
+});
+
+describe('allowRemovedRestrictions', () => {
+  beforeEach(() => {
+    sinon.stub(window, 'confirm');
+  });
+
+  afterEach(() => {
+    window.confirm.restore();
+  });
+
+  it('returns true if no restrictions removed', () => {
+    assert.isTrue(allowRemovedRestrictions([
+      {label: 'not-restricted'},
+      {label: 'fine'},
+    ]));
+  });
+
+  it('returns false if restrictions removed and confirmation denied', () => {
+    window.confirm.returns(false);
+    assert.isFalse(allowRemovedRestrictions([
+      {label: 'not-restricted'},
+      {label: 'restrict-view-people'},
+    ]));
+  });
+
+  it('returns true if restrictions removed and confirmation accepted', () => {
+    window.confirm.returns(true);
+    assert.isTrue(allowRemovedRestrictions([
+      {label: 'not-restricted'},
+      {label: 'restrict-view-people'},
+    ]));
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.js b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.js
new file mode 100644
index 0000000..804c8d1
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.js
@@ -0,0 +1,1188 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/framework/mr-upload/mr-upload.js';
+import 'elements/framework/mr-star/mr-issue-star.js';
+import 'elements/chops/chops-checkbox/chops-checkbox.js';
+import 'elements/chops/chops-chip/chops-chip.js';
+import 'elements/framework/mr-error/mr-error.js';
+import 'elements/framework/mr-warning/mr-warning.js';
+import 'elements/help/mr-cue/mr-cue.js';
+import 'react/mr-react-autocomplete.tsx';
+import {cueNames} from 'elements/help/mr-cue/cue-helpers.js';
+import {store, connectStore} from 'reducers/base.js';
+import {UserInputError} from 'shared/errors.js';
+import {fieldTypes} from 'shared/issue-fields.js';
+import {displayNameToUserRef, labelStringToRef, componentStringToRef,
+  componentRefsToStrings, issueStringToRef, issueStringToBlockingRef,
+  issueRefToString, issueRefsToStrings, filteredUserDisplayNames,
+  valueToFieldValue, fieldDefToName,
+} from 'shared/convertersV0.js';
+import {arrayDifference, isEmptyObject, equalsIgnoreCase} from 'shared/helpers.js';
+import {NON_EDITING_KEY_EVENTS} from 'shared/dom-helpers.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as permissions from 'reducers/permissions.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as ui from 'reducers/ui.js';
+import '../mr-edit-field/mr-edit-field.js';
+import '../mr-edit-field/mr-edit-status.js';
+import {ISSUE_EDIT_PERMISSION, ISSUE_EDIT_SUMMARY_PERMISSION,
+  ISSUE_EDIT_STATUS_PERMISSION, ISSUE_EDIT_OWNER_PERMISSION,
+  ISSUE_EDIT_CC_PERMISSION,
+} from 'shared/consts/permissions.js';
+import {fieldDefsWithGroup, fieldDefsWithoutGroup, valuesForField,
+  HARDCODED_FIELD_GROUPS} from 'shared/metadata-helpers.js';
+import {renderMarkdown, shouldRenderMarkdown} from 'shared/md-helper.js';
+import {unsafeHTML} from 'lit-html/directives/unsafe-html.js';
+import {MD_PREVIEW_STYLES, MD_STYLES} from 'shared/shared-styles.js';
+
+
+
+/**
+ * `<mr-edit-metadata>`
+ *
+ * Editing form for either an approval or the overall issue.
+ *
+ */
+export class MrEditMetadata extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+      <style>
+        ${MD_PREVIEW_STYLES}
+        ${MD_STYLES}
+        mr-edit-metadata {
+          display: block;
+          font-size: var(--chops-main-font-size);
+        }
+        mr-edit-metadata.edit-actions-right .edit-actions {
+          flex-direction: row-reverse;
+          text-align: right;
+        }
+        mr-edit-metadata.edit-actions-right .edit-actions chops-checkbox {
+          text-align: left;
+        }
+        .edit-actions chops-checkbox {
+          max-width: 200px;
+          margin-top: 2px;
+          flex-grow: 2;
+          text-align: right;
+        }
+        .edit-actions {
+          width: 100%;
+          max-width: 500px;
+          margin: 0.5em 0;
+          text-align: left;
+          display: flex;
+          flex-direction: row;
+          align-items: center;
+        }
+        .edit-actions chops-button {
+          flex-grow: 0;
+          flex-shrink: 0;
+        }
+        .edit-actions .emphasized {
+          margin-left: 0;
+        }
+        input {
+          box-sizing: border-box;
+          width: var(--mr-edit-field-width);
+          padding: var(--mr-edit-field-padding);
+          font-size: var(--chops-main-font-size);
+        }
+        mr-upload {
+          margin-bottom: 0.25em;
+        }
+        textarea {
+          font-family: var(--mr-toggled-font-family);
+          width: 100%;
+          margin: 0.25em 0;
+          box-sizing: border-box;
+          border: var(--chops-accessible-border);
+          height: 8em;
+          transition: height 0.1s ease-in-out;
+          padding: 0.5em 4px;
+          grid-column-start: 1;
+          grid-column-end: 2;
+        }
+        button.toggle {
+          background: none;
+          color: var(--chops-link-color);
+          border: 0;
+          width: 100%;
+          padding: 0.25em 0;
+          text-align: left;
+        }
+        button.toggle:hover {
+          cursor: pointer;
+          text-decoration: underline;
+        }
+        .presubmit-derived {
+          color: gray;
+          font-style: italic;
+          text-decoration-line: underline;
+          text-decoration-style: dotted;
+        }
+        .presubmit-derived-header {
+          color: gray;
+          font-weight: bold;
+        }
+        .discard-button {
+          margin-right: 16px;
+          margin-left: 16px;
+        }
+        .group {
+          width: 100%;
+          border: 1px solid hsl(0, 0%, 83%);
+          grid-column: 1 / -1;
+          margin: 0;
+          margin-bottom: 0.5em;
+          padding: 0;
+          padding-bottom: 0.5em;
+        }
+        .group legend {
+          margin-left: 130px;
+        }
+        .group-title {
+          text-align: center;
+          font-style: oblique;
+          margin-top: 4px;
+          margin-bottom: -8px;
+        }
+        .star-line {
+          display: flex;
+          align-items: center;
+          background: var(--chops-notice-bubble-bg);
+          border: var(--chops-notice-border);
+          justify-content: flex-start;
+          margin-top: 4px;
+          padding: 2px 4px 2px 8px;
+        }
+        mr-issue-star {
+          margin-right: 4px;
+        }
+      </style>
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <form id="editForm"
+        @submit=${this._save}
+        @keydown=${this._saveOnCtrlEnter}
+      >
+        <mr-cue cuePrefName=${cueNames.CODE_OF_CONDUCT}></mr-cue>
+        ${this._renderStarLine()}
+        <textarea
+          id="commentText"
+          placeholder="Add a comment"
+          @keyup=${this._processChanges}
+          aria-label="Comment"
+        ></textarea>
+        ${(this._renderMarkdown)
+           ? html`
+          <div class="markdown-preview preview-height-comment">
+            <div class="markdown">
+              ${unsafeHTML(renderMarkdown(this.getCommentContent()))}
+            </div>
+          </div>`: ''}
+        <mr-upload
+          ?hidden=${this.disableAttachments}
+          @change=${this._processChanges}
+        ></mr-upload>
+        <div class="input-grid">
+          ${this._renderEditFields()}
+          ${this._renderErrorsAndWarnings()}
+
+          <span></span>
+          <div class="edit-actions">
+            <chops-button
+              @click=${this._save}
+              class="save-changes emphasized"
+              ?disabled=${this.disabled}
+              title="Save changes (Ctrl+Enter / \u2318+Enter)"
+            >
+              Save changes
+            </chops-button>
+            <chops-button
+              @click=${this.discard}
+              class="de-emphasized discard-button"
+              ?disabled=${this.disabled}
+            >
+              Discard
+            </chops-button>
+
+            <chops-checkbox
+              id="sendEmail"
+              @checked-change=${this._sendEmailChecked}
+              ?checked=${this.sendEmail}
+            >Send email</chops-checkbox>
+          </div>
+
+          ${!this.isApproval ? this._renderPresubmitChanges() : ''}
+        </div>
+      </form>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderStarLine() {
+    if (this._canEditIssue || this.isApproval) return '';
+
+    return html`
+      <div class="star-line">
+        <mr-issue-star
+          .issueRef=${this.issueRef}
+        ></mr-issue-star>
+        <span>
+          ${this.isStarred ? `
+            You have voted for this issue and will receive notifications.
+          ` : `
+            Star this issue instead of commenting "+1 Me too!" to add a vote
+            and get notifications.`}
+        </span>
+      </div>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderPresubmitChanges() {
+    const {derivedCcs, derivedLabels} = this.presubmitResponse || {};
+    const hasCcs = derivedCcs && derivedCcs.length;
+    const hasLabels = derivedLabels && derivedLabels.length;
+    const hasDerivedValues = hasCcs || hasLabels;
+    return html`
+      ${hasDerivedValues ? html`
+        <span></span>
+        <div class="presubmit-derived-header">
+          Filter rules and components will add
+        </div>
+        ` : ''}
+
+      ${hasCcs? html`
+        <label
+          for="derived-ccs"
+          class="presubmit-derived-header"
+        >CC:</label>
+        <div id="derived-ccs">
+          ${derivedCcs.map((cc) => html`
+            <span
+              title=${cc.why}
+              class="presubmit-derived"
+            >${cc.value}</span>
+          `)}
+        </div>
+        ` : ''}
+
+      ${hasLabels ? html`
+        <label
+          for="derived-labels"
+          class="presubmit-derived-header"
+        >Labels:</label>
+        <div id="derived-labels">
+          ${derivedLabels.map((label) => html`
+            <span
+              title=${label.why}
+              class="presubmit-derived"
+            >${label.value}</span>
+          `)}
+        </div>
+        ` : ''}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderErrorsAndWarnings() {
+    const presubmitResponse = this.presubmitResponse || {};
+    const presubmitWarnings = presubmitResponse.warnings || [];
+    const presubmitErrors = presubmitResponse.errors || [];
+    return (this.error || presubmitWarnings.length || presubmitErrors.length) ?
+      html`
+        <span></span>
+        <div>
+          ${presubmitWarnings.map((warning) => html`
+            <mr-warning title=${warning.why}>${warning.value}</mr-warning>
+          `)}
+          <!-- TODO(ehmaldonado): Look into blocking submission on presubmit
+          -->
+          ${presubmitErrors.map((error) => html`
+            <mr-error title=${error.why}>${error.value}</mr-error>
+          `)}
+          ${this.error ? html`
+            <mr-error>${this.error}</mr-error>` : ''}
+        </div>
+      ` : '';
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderEditFields() {
+    if (this.isApproval) {
+      return html`
+        ${this._renderStatus()}
+        ${this._renderApprovers()}
+        ${this._renderFieldDefs()}
+
+        ${this._renderNicheFieldToggle()}
+      `;
+    }
+
+    return html`
+      ${this._canEditSummary ? this._renderSummary() : ''}
+      ${this._canEditStatus ? this._renderStatus() : ''}
+      ${this._canEditOwner ? this._renderOwner() : ''}
+      ${this._canEditCC ? this._renderCC() : ''}
+      ${this._canEditIssue ? html`
+        ${this._renderComponents()}
+
+        ${this._renderFieldDefs()}
+        ${this._renderRelatedIssues()}
+        ${this._renderLabels()}
+
+        ${this._renderNicheFieldToggle()}
+      ` : ''}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderSummary() {
+    return html`
+      <label for="summaryInput">Summary:</label>
+      <input
+        id="summaryInput"
+        value=${this.summary}
+        @keyup=${this._processChanges}
+      />
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderOwner() {
+    const ownerPresubmit = this._ownerPresubmit;
+    return html`
+      <label for="ownerInput">
+        ${ownerPresubmit.message ? html`
+          <i
+            class=${`material-icons inline-${ownerPresubmit.icon}`}
+            title=${ownerPresubmit.message}
+          >${ownerPresubmit.icon}</i>
+        ` : ''}
+        Owner:
+      </label>
+      <mr-react-autocomplete
+        label="ownerInput"
+        vocabularyName="owner"
+        .placeholder=${ownerPresubmit.placeholder}
+        .value=${this._values.owner}
+        .onChange=${this._changeHandlers.owner}
+      ></mr-react-autocomplete>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderCC() {
+    return html`
+      <label for="ccInput">CC:</label>
+      <mr-react-autocomplete
+        label="ccInput"
+        vocabularyName="member"
+        .multiple=${true}
+        .fixedValues=${this._derivedCCs}
+        .value=${this._values.cc}
+        .onChange=${this._changeHandlers.cc}
+      ></mr-react-autocomplete>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderComponents() {
+    return html`
+      <label for="componentsInput">Components:</label>
+      <mr-react-autocomplete
+        label="componentsInput"
+        vocabularyName="component"
+        .multiple=${true}
+        .value=${this._values.components}
+        .onChange=${this._changeHandlers.components}
+      ></mr-react-autocomplete>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderApprovers() {
+    return this.hasApproverPrivileges && this.isApproval ? html`
+      <label for="approversInput_react">Approvers:</label>
+      <mr-edit-field
+        id="approversInput"
+        label="approversInput_react"
+        .type=${'USER_TYPE'}
+        .initialValues=${filteredUserDisplayNames(this.approvers)}
+        .name=${'approver'}
+        .acType=${'member'}
+        @change=${this._processChanges}
+        multi
+      ></mr-edit-field>
+    ` : '';
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderStatus() {
+    return this.statuses && this.statuses.length ? html`
+      <label for="statusInput">Status:</label>
+
+      <mr-edit-status
+        id="statusInput"
+        .initialStatus=${this.status}
+        .statuses=${this.statuses}
+        .mergedInto=${issueRefToString(this.mergedInto, this.projectName)}
+        ?isApproval=${this.isApproval}
+        @change=${this._processChanges}
+      ></mr-edit-status>
+    ` : '';
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderFieldDefs() {
+    return html`
+      ${fieldDefsWithGroup(this.fieldDefs, this.fieldGroups, this.issueType).map((group) => html`
+        <fieldset class="group">
+          <legend>${group.groupName}</legend>
+          <div class="input-grid">
+            ${group.fieldDefs.map((field) => this._renderCustomField(field))}
+          </div>
+        </fieldset>
+      `)}
+
+      ${fieldDefsWithoutGroup(this.fieldDefs, this.fieldGroups, this.issueType).map((field) => this._renderCustomField(field))}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderRelatedIssues() {
+    return html`
+      <label for="blockedOnInput">BlockedOn:</label>
+      <mr-react-autocomplete
+        label="blockedOnInput"
+        vocabularyName="component"
+        .multiple=${true}
+        .value=${this._values.blockedOn}
+        .onChange=${this._changeHandlers.blockedOn}
+      ></mr-react-autocomplete>
+
+      <label for="blockingInput">Blocking:</label>
+      <mr-react-autocomplete
+        label="blockingInput"
+        vocabularyName="component"
+        .multiple=${true}
+        .value=${this._values.blocking}
+        .onChange=${this._changeHandlers.blocking}
+      ></mr-react-autocomplete>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderLabels() {
+    return html`
+      <label for="labelsInput">Labels:</label>
+      <mr-react-autocomplete
+        label="labelsInput"
+        vocabularyName="label"
+        .multiple=${true}
+        .fixedValues=${this.derivedLabels}
+        .value=${this._values.labels}
+        .onChange=${this._changeHandlers.labels}
+      ></mr-react-autocomplete>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @param {FieldDef} field The custom field beinf rendered.
+   * @private
+   */
+  _renderCustomField(field) {
+    if (!field || !field.fieldRef) return '';
+    const userCanEdit = this._userCanEdit(field);
+    const {fieldRef, isNiche, docstring, isMultivalued} = field;
+    const isHidden = (!this.showNicheFields && isNiche) || !userCanEdit;
+
+    let acType;
+    if (fieldRef.type === fieldTypes.USER_TYPE) {
+      acType = isMultivalued ? 'member' : 'owner';
+    }
+    return html`
+      <label
+        ?hidden=${isHidden}
+        for=${this._idForField(fieldRef.fieldName) + '_react'}
+        title=${docstring}
+      >
+        ${fieldRef.fieldName}:
+      </label>
+      <mr-edit-field
+        ?hidden=${isHidden}
+        id=${this._idForField(fieldRef.fieldName)}
+        .label=${this._idForField(fieldRef.fieldName) + '_react'}
+        .name=${fieldRef.fieldName}
+        .type=${fieldRef.type}
+        .options=${this._optionsForField(this.optionsPerEnumField, this.fieldValueMap, fieldRef.fieldName, this.phaseName)}
+        .initialValues=${valuesForField(this.fieldValueMap, fieldRef.fieldName, this.phaseName)}
+        .acType=${acType}
+        ?multi=${isMultivalued}
+        @change=${this._processChanges}
+      ></mr-edit-field>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderNicheFieldToggle() {
+    return this._nicheFieldCount ? html`
+      <span></span>
+      <button type="button" class="toggle" @click=${this.toggleNicheFields}>
+        <span ?hidden=${this.showNicheFields}>
+          Show all fields (${this._nicheFieldCount} currently hidden)
+        </span>
+        <span ?hidden=${!this.showNicheFields}>
+          Hide niche fields (${this._nicheFieldCount} currently shown)
+        </span>
+      </button>
+    ` : '';
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      fieldDefs: {type: Array},
+      formName: {type: String},
+      approvers: {type: Array},
+      setter: {type: Object},
+      summary: {type: String},
+      cc: {type: Array},
+      components: {type: Array},
+      status: {type: String},
+      statuses: {type: Array},
+      blockedOn: {type: Array},
+      blocking: {type: Array},
+      mergedInto: {type: Object},
+      ownerName: {type: String},
+      labelNames: {type: Array},
+      derivedLabels: {type: Array},
+      _permissions: {type: Array},
+      phaseName: {type: String},
+      projectConfig: {type: Object},
+      projectName: {type: String},
+      isApproval: {type: Boolean},
+      isStarred: {type: Boolean},
+      issuePermissions: {type: Object},
+      issueRef: {type: Object},
+      hasApproverPrivileges: {type: Boolean},
+      showNicheFields: {type: Boolean},
+      disableAttachments: {type: Boolean},
+      error: {type: String},
+      sendEmail: {type: Boolean},
+      presubmitResponse: {type: Object},
+      fieldValueMap: {type: Object},
+      issueType: {type: String},
+      optionsPerEnumField: {type: String},
+      fieldGroups: {type: Object},
+      prefs: {type: Object},
+      saving: {type: Boolean},
+      isDirty: {type: Boolean},
+      _values: {type: Object},
+      _initialValues: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.summary = '';
+    this.ownerName = '';
+    this.sendEmail = true;
+    this.mergedInto = {};
+    this.issueRef = {};
+    this.fieldGroups = HARDCODED_FIELD_GROUPS;
+
+    this._permissions = {};
+    this.saving = false;
+    this.isDirty = false;
+    this.prefs = {};
+    this._values = {};
+    this._initialValues = {};
+
+    // Memoize change handlers so property updates don't cause excess rerenders.
+    this._changeHandlers = {
+      owner: this._onChange.bind(this, 'owner'),
+      cc: this._onChange.bind(this, 'cc'),
+      components: this._onChange.bind(this, 'components'),
+      labels: this._onChange.bind(this, 'labels'),
+      blockedOn: this._onChange.bind(this, 'blockedOn'),
+      blocking: this._onChange.bind(this, 'blocking'),
+    };
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  firstUpdated() {
+    this.hasRendered = true;
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('ownerName') || changedProperties.has('cc')
+        || changedProperties.has('components')
+        || changedProperties.has('labelNames')
+        || changedProperties.has('blockedOn')
+        || changedProperties.has('blocking')
+        || changedProperties.has('projectName')) {
+      this._initialValues.owner = this.ownerName;
+      this._initialValues.cc = this._ccNames;
+      this._initialValues.components = componentRefsToStrings(this.components);
+      this._initialValues.labels = this.labelNames;
+      this._initialValues.blockedOn = issueRefsToStrings(this.blockedOn, this.projectName);
+      this._initialValues.blocking = issueRefsToStrings(this.blocking, this.projectName);
+
+      this._values = {...this._initialValues};
+    }
+  }
+
+  /**
+   * Getter for checking if the user has Markdown enabled.
+   * @return {boolean} Whether Markdown preview should be rendered or not.
+   */
+  get _renderMarkdown() {
+    if (!this.getCommentContent()) {
+      return false;
+    }
+    const enabled = this.prefs.get('render_markdown');
+    return shouldRenderMarkdown({project: this.projectName, enabled});
+  }
+
+  /**
+   * @return {boolean} Whether the "Save changes" button is disabled.
+   */
+  get disabled() {
+    return !this.isDirty || this.saving;
+  }
+
+  /**
+   * Set isDirty to a property instead of only using a getter to cause
+   * lit-element to re-render when dirty state change.
+   */
+  _updateIsDirty() {
+    if (!this.hasRendered) return;
+
+    const commentContent = this.getCommentContent();
+    const attachmentsElement = this.querySelector('mr-upload');
+    this.isDirty = !isEmptyObject(this.delta) || Boolean(commentContent) ||
+      attachmentsElement.hasAttachments;
+  }
+
+  get _nicheFieldCount() {
+    const fieldDefs = this.fieldDefs || [];
+    return fieldDefs.reduce((acc, fd) => acc + (fd.isNiche | 0), 0);
+  }
+
+  get _canEditIssue() {
+    const issuePermissions = this.issuePermissions || [];
+    return issuePermissions.includes(ISSUE_EDIT_PERMISSION);
+  }
+
+  get _canEditSummary() {
+    const issuePermissions = this.issuePermissions || [];
+    return this._canEditIssue ||
+      issuePermissions.includes(ISSUE_EDIT_SUMMARY_PERMISSION);
+  }
+
+  get _canEditStatus() {
+    const issuePermissions = this.issuePermissions || [];
+    return this._canEditIssue ||
+      issuePermissions.includes(ISSUE_EDIT_STATUS_PERMISSION);
+  }
+
+  get _canEditOwner() {
+    const issuePermissions = this.issuePermissions || [];
+    return this._canEditIssue ||
+      issuePermissions.includes(ISSUE_EDIT_OWNER_PERMISSION);
+  }
+
+  get _canEditCC() {
+    const issuePermissions = this.issuePermissions || [];
+    return this._canEditIssue ||
+      issuePermissions.includes(ISSUE_EDIT_CC_PERMISSION);
+  }
+
+  /**
+   * @return {Array<string>}
+   */
+  get _ccNames() {
+    const users = this.cc || [];
+    return filteredUserDisplayNames(users.filter((u) => !u.isDerived));
+  }
+
+  get _derivedCCs() {
+    const users = this.cc || [];
+    return filteredUserDisplayNames(users.filter((u) => u.isDerived));
+  }
+
+  get _ownerPresubmit() {
+    const response = this.presubmitResponse;
+    if (!response) return {};
+
+    const ownerView = {message: '', placeholder: '', icon: ''};
+
+    if (response.ownerAvailability) {
+      ownerView.message = response.ownerAvailability;
+      ownerView.icon = 'warning';
+    } else if (response.derivedOwners && response.derivedOwners.length) {
+      ownerView.placeholder = response.derivedOwners[0].value;
+      ownerView.message = response.derivedOwners[0].why;
+      ownerView.icon = 'info';
+    }
+    return ownerView;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.fieldValueMap = issueV0.fieldValueMap(state);
+    this.issueType = issueV0.type(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this._permissions = permissions.byName(state);
+    this.presubmitResponse = issueV0.presubmitResponse(state);
+    this.projectConfig = projectV0.viewedConfig(state);
+    this.projectName = issueV0.viewedIssueRef(state).projectName;
+    this.issuePermissions = issueV0.permissions(state);
+    this.optionsPerEnumField = projectV0.optionsPerEnumField(state);
+    // Access boolean value from allStarredIssues
+    const starredIssues = issueV0.starredIssues(state);
+    this.isStarred = starredIssues.has(issueRefToString(this.issueRef));
+    this.prefs = userV0.prefs(state);
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    store.dispatch(ui.reportDirtyForm(this.formName, false));
+  }
+
+  /**
+   * Resets the edit form values to their default values.
+   */
+  async reset() {
+    this._values = {...this._initialValues};
+
+    const form = this.querySelector('#editForm');
+    if (!form) return;
+
+    form.reset();
+    const statusInput = this.querySelector('#statusInput');
+    if (statusInput) {
+      statusInput.reset();
+    }
+
+    // Since custom elements containing <input> elements have the inputs
+    // wrapped in ShadowDOM, those inputs don't get reset with the rest of
+    // the form. Haven't been able to figure out a way to replicate form reset
+    // behavior with custom input elements.
+    if (this.isApproval) {
+      if (this.hasApproverPrivileges) {
+        const approversInput = this.querySelector(
+            '#approversInput');
+        if (approversInput) {
+          approversInput.reset();
+        }
+      }
+    }
+    this.querySelectorAll('mr-edit-field').forEach((el) => {
+      el.reset();
+    });
+
+    const uploader = this.querySelector('mr-upload');
+    if (uploader) {
+      uploader.reset();
+    }
+
+    // TODO(dtu, zhangtiff): Remove once all form fields are controlled.
+    await this.updateComplete;
+
+    this._processChanges();
+  }
+
+  /**
+   * @param {MouseEvent|SubmitEvent} event
+   * @private
+   */
+  _save(event) {
+    event.preventDefault();
+    this.save();
+  }
+
+  /**
+   * Users may use either Ctrl+Enter or Command+Enter to save an issue edit
+   * while the issue edit form is focused.
+   * @param {KeyboardEvent} event
+   * @private
+   */
+  _saveOnCtrlEnter(event) {
+    if (event.key === 'Enter' && (event.ctrlKey || event.metaKey)) {
+      event.preventDefault();
+      this.save();
+    }
+  }
+
+  /**
+   * Tells the parent to save the current edited values in the form.
+   * @fires CustomEvent#save
+   */
+  save() {
+    this.dispatchEvent(new CustomEvent('save'));
+  }
+
+  /**
+   * Tells the parent component that the user is trying to discard the form,
+   * if they confirm that that's what they're doing. The parent decides what
+   * to do in order to quit the editing session.
+   * @fires CustomEvent#discard
+   */
+  discard() {
+    const isDirty = this.isDirty;
+    if (!isDirty || confirm('Discard your changes?')) {
+      this.dispatchEvent(new CustomEvent('discard'));
+    }
+  }
+
+  /**
+   * Focuses the comment form.
+   */
+  async focus() {
+    await this.updateComplete;
+    this.querySelector('#commentText').focus();
+  }
+
+  /**
+   * Retrieves the value of the comment that the user added from the DOM.
+   * @return {string}
+   */
+  getCommentContent() {
+    if (!this.querySelector('#commentText')) {
+      return '';
+    }
+    return this.querySelector('#commentText').value;
+  }
+
+  async getAttachments() {
+    try {
+      return await this.querySelector('mr-upload').loadFiles();
+    } catch (e) {
+      this.error = `Error while loading file for attachment: ${e.message}`;
+    }
+  }
+
+  /**
+   * @param {FieldDef} field
+   * @return {boolean}
+   * @private
+   */
+  _userCanEdit(field) {
+    const fieldName = fieldDefToName(this.projectName, field);
+    if (!this._permissions[fieldName] ||
+        !this._permissions[fieldName].permissions) return false;
+    const userPerms = this._permissions[fieldName].permissions;
+    return userPerms.includes(permissions.FIELD_DEF_VALUE_EDIT);
+  }
+
+  /**
+   * Shows or hides custom fields with the "isNiche" attribute set to true.
+   */
+  toggleNicheFields() {
+    this.showNicheFields = !this.showNicheFields;
+  }
+
+  /**
+   * @return {IssueDelta}
+   * @throws {UserInputError}
+   */
+  get delta() {
+    try {
+      this.error = '';
+      return this._getDelta();
+    } catch (e) {
+      if (!(e instanceof UserInputError)) throw e;
+      this.error = e.message;
+      return {};
+    }
+  }
+
+  /**
+   * Generates a change between the initial Issue state and what the user
+   * inputted.
+   * @return {IssueDelta}
+   */
+  _getDelta() {
+    let result = {};
+
+    const {projectName, localId} = this.issueRef;
+
+    const statusInput = this.querySelector('#statusInput');
+    if (this._canEditStatus && statusInput) {
+      const statusDelta = statusInput.delta;
+      if (statusDelta.mergedInto) {
+        result.mergedIntoRef = issueStringToBlockingRef(
+            {projectName, localId}, statusDelta.mergedInto);
+      }
+      if (statusDelta.status) {
+        result.status = statusDelta.status;
+      }
+    }
+
+    if (this.isApproval) {
+      if (this._canEditIssue && this.hasApproverPrivileges) {
+        result = {
+          ...result,
+          ...this._changedValuesDom(
+            'approvers', 'approverRefs', displayNameToUserRef),
+        };
+      }
+    } else {
+      // TODO(zhangtiff): Consider representing baked-in fields such as owner,
+      // cc, and status similarly to custom fields to reduce repeated code.
+
+      if (this._canEditSummary) {
+        const summaryInput = this.querySelector('#summaryInput');
+        if (summaryInput) {
+          const newSummary = summaryInput.value;
+          if (newSummary !== this.summary) {
+            result.summary = newSummary;
+          }
+        }
+      }
+
+      if (this._values.owner !== this._initialValues.owner) {
+        result.ownerRef = displayNameToUserRef(this._values.owner);
+      }
+
+      const blockerAddFn = (refString) =>
+        issueStringToBlockingRef({projectName, localId}, refString);
+      const blockerRemoveFn = (refString) =>
+        issueStringToRef(refString, projectName);
+
+      result = {
+        ...result,
+        ...this._changedValuesControlled(
+          'cc', 'ccRefs', displayNameToUserRef),
+        ...this._changedValuesControlled(
+          'components', 'compRefs', componentStringToRef),
+        ...this._changedValuesControlled(
+          'labels', 'labelRefs', labelStringToRef),
+        ...this._changedValuesControlled(
+          'blockedOn', 'blockedOnRefs', blockerAddFn, blockerRemoveFn),
+        ...this._changedValuesControlled(
+          'blocking', 'blockingRefs', blockerAddFn, blockerRemoveFn),
+      };
+    }
+
+    if (this._canEditIssue) {
+      const fieldDefs = this.fieldDefs || [];
+      fieldDefs.forEach(({fieldRef}) => {
+        const {fieldValsAdd = [], fieldValsRemove = []} =
+          this._changedValuesDom(fieldRef.fieldName, 'fieldVals',
+            valueToFieldValue.bind(null, fieldRef));
+
+        // Because multiple custom fields share the same "fieldVals" key in
+        // delta, we hav to make sure to concatenate updated delta values with
+        // old delta values.
+        if (fieldValsAdd.length) {
+          result.fieldValsAdd = [...(result.fieldValsAdd || []),
+            ...fieldValsAdd];
+        }
+
+        if (fieldValsRemove.length) {
+          result.fieldValsRemove = [...(result.fieldValsRemove || []),
+            ...fieldValsRemove];
+        }
+      });
+    }
+
+    return result;
+  }
+
+  /**
+   * Computes delta values for a controlled input.
+   * @param {string} fieldName The key in the values property to retrieve data.
+   *   from.
+   * @param {string} responseKey The key in the delta Object that changes will be
+   *   saved in.
+   * @param {function(string): any} addFn A function to specify how to format
+   *   the message for a given added field.
+   * @param {function(string): any} removeFn A function to specify how to format
+   *   the message for a given removed field.
+   * @return {Object} delta fragment for added and removed values.
+   */
+  _changedValuesControlled(fieldName, responseKey, addFn, removeFn) {
+    const values = this._values[fieldName];
+    const initialValues = this._initialValues[fieldName];
+
+    const valuesAdd = arrayDifference(values, initialValues, equalsIgnoreCase);
+    const valuesRemove =
+      arrayDifference(initialValues, values, equalsIgnoreCase);
+
+    return this._changedValues(valuesAdd, valuesRemove, responseKey, addFn, removeFn);
+  }
+
+  /**
+   * Gets changes values when reading from a legacy <mr-edit-field> element.
+   * @param {string} fieldName Name of the form input we're checking values on.
+   * @param {string} responseKey The key in the delta Object that changes will be
+   *   saved in.
+   * @param {function(string): any} addFn A function to specify how to format
+   *   the message for a given added field.
+   * @param {function(string): any} removeFn A function to specify how to format
+   *   the message for a given removed field.
+   * @return {Object} delta fragment for added and removed values.
+   */
+  _changedValuesDom(fieldName, responseKey, addFn, removeFn) {
+    const input = this.querySelector(`#${this._idForField(fieldName)}`);
+    if (!input) return;
+
+    const valuesAdd = input.getValuesAdded();
+    const valuesRemove = input.getValuesRemoved();
+
+    return this._changedValues(valuesAdd, valuesRemove, responseKey, addFn, removeFn);
+  }
+
+  /**
+   * Shared helper function for computing added and removed values for a
+   * single field in a delta.
+   * @param {Array<string>} valuesAdd The added values. For example, new CCed
+   *   users.
+   * @param {Array<string>} valuesRemove Values that were removed in this edit.
+   * @param {string} responseKey The key in the delta Object that changes will be
+   *   saved in.
+   * @param {function(string): any} addFn A function to specify how to format
+   *   the message for a given added field.
+   * @param {function(string): any} removeFn A function to specify how to format
+   *   the message for a given removed field.
+   * @return {Object} delta fragment for added and removed values.
+   */
+  _changedValues(valuesAdd, valuesRemove, responseKey, addFn, removeFn) {
+    const delta = {};
+
+    if (valuesAdd && valuesAdd.length) {
+      delta[responseKey + 'Add'] = valuesAdd.map(addFn);
+    }
+
+    if (valuesRemove && valuesRemove.length) {
+      delta[responseKey + 'Remove'] = valuesRemove.map(removeFn || addFn);
+    }
+
+    return delta;
+  }
+
+  /**
+   * Generic onChange handler to be bound to each form field.
+   * @param {string} key Unique name for the form field we're binding this
+   *   handler to. For example, 'owner', 'cc', or the name of a custom field.
+   * @param {Event} event
+   * @param {string|Array<string>} value The new form value.
+   * @param {*} _reason
+   */
+  _onChange(key, event, value, _reason) {
+    this._values = {...this._values, [key]: value};
+    this._processChanges(event);
+  }
+
+  /**
+   * Event handler for running filter rules presubmit logic.
+   * @param {Event} e
+   */
+  _processChanges(e) {
+    if (e instanceof KeyboardEvent) {
+      if (NON_EDITING_KEY_EVENTS.has(e.key)) return;
+    }
+    this._updateIsDirty();
+
+    store.dispatch(ui.reportDirtyForm(this.formName, this.isDirty));
+
+    this.dispatchEvent(new CustomEvent('change', {
+      detail: {
+        delta: this.delta,
+        commentContent: this.getCommentContent(),
+      },
+    }));
+  }
+
+  _idForField(name) {
+    return `${name}Input`;
+  }
+
+  _optionsForField(optionsPerEnumField, fieldValueMap, fieldName, phaseName) {
+    if (!optionsPerEnumField || !fieldName) return [];
+    const key = fieldName.toLowerCase();
+    if (!optionsPerEnumField.has(key)) return [];
+    const options = [...optionsPerEnumField.get(key)];
+    const values = valuesForField(fieldValueMap, fieldName, phaseName);
+    values.forEach((v) => {
+      const optionExists = options.find(
+          (opt) => equalsIgnoreCase(opt.optionName, v));
+      if (!optionExists) {
+        // Note that enum fields which are not explicitly defined can be set,
+        // such as in the case when an issue is moved.
+        options.push({optionName: v});
+      }
+    });
+    return options;
+  }
+
+  _sendEmailChecked(evt) {
+    this.sendEmail = evt.detail.checked;
+  }
+}
+
+customElements.define('mr-edit-metadata', MrEditMetadata);
diff --git a/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.test.js b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.test.js
new file mode 100644
index 0000000..2e4554f
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.test.js
@@ -0,0 +1,1078 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {fireEvent} from '@testing-library/react';
+
+import {MrEditMetadata} from './mr-edit-metadata.js';
+import {ISSUE_EDIT_PERMISSION, ISSUE_EDIT_SUMMARY_PERMISSION,
+  ISSUE_EDIT_STATUS_PERMISSION, ISSUE_EDIT_OWNER_PERMISSION,
+  ISSUE_EDIT_CC_PERMISSION,
+} from 'shared/consts/permissions.js';
+import {FIELD_DEF_VALUE_EDIT} from 'reducers/permissions.js';
+import {store, resetState} from 'reducers/base.js';
+import {enterInput} from 'shared/test/helpers.js';
+
+let element;
+
+xdescribe('mr-edit-metadata', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+    element = document.createElement('mr-edit-metadata');
+    document.body.appendChild(element);
+
+    element.issuePermissions = [ISSUE_EDIT_PERMISSION];
+
+    sinon.stub(store, 'dispatch');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    store.dispatch.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrEditMetadata);
+  });
+
+  describe('updated sets initial values', () => {
+    it('updates owner', async () => {
+      element.ownerName = 'goose@bird.org';
+      await element.updateComplete;
+
+      assert.equal(element._values.owner, 'goose@bird.org');
+    });
+
+    it('updates cc', async () => {
+      element.cc = [
+        {displayName: 'initial-cc@bird.org', userId: '1234'},
+      ];
+      await element.updateComplete;
+
+      assert.deepEqual(element._values.cc, ['initial-cc@bird.org']);
+    });
+
+    it('updates components', async () => {
+      element.components = [{path: 'Hello>World'}];
+
+      await element.updateComplete;
+
+      assert.deepEqual(element._values.components, ['Hello>World']);
+    });
+
+    it('updates labels', async () => {
+      element.labelNames = ['test-label'];
+
+      await element.updateComplete;
+
+      assert.deepEqual(element._values.labels, ['test-label']);
+    });
+  });
+
+  describe('saves edit form', () => {
+    let saveStub;
+
+    beforeEach(() => {
+      saveStub = sinon.stub();
+      element.addEventListener('save', saveStub);
+    });
+
+    it('saves on form submit', async () => {
+      await element.updateComplete;
+
+      element.querySelector('#editForm').dispatchEvent(
+          new Event('submit', {bubbles: true, cancelable: true}));
+
+      sinon.assert.calledOnce(saveStub);
+    });
+
+    it('saves when clicking the save button', async () => {
+      await element.updateComplete;
+
+      element.querySelector('.save-changes').click();
+
+      sinon.assert.calledOnce(saveStub);
+    });
+
+    it('does not save on random keydowns', async () => {
+      await element.updateComplete;
+
+      element.querySelector('#editForm').dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'a', ctrlKey: true}));
+      element.querySelector('#editForm').dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'b', ctrlKey: false}));
+      element.querySelector('#editForm').dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'c', metaKey: true}));
+
+      sinon.assert.notCalled(saveStub);
+    });
+
+    it('does not save on Enter without Ctrl', async () => {
+      await element.updateComplete;
+
+      element.querySelector('#editForm').dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'Enter', ctrlKey: false}));
+
+      sinon.assert.notCalled(saveStub);
+    });
+
+    it('saves on Ctrl+Enter', async () => {
+      await element.updateComplete;
+
+      element.querySelector('#editForm').dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'Enter', ctrlKey: true}));
+
+      sinon.assert.calledOnce(saveStub);
+    });
+
+    it('saves on Ctrl+Meta', async () => {
+      await element.updateComplete;
+
+      element.querySelector('#editForm').dispatchEvent(
+          new KeyboardEvent('keydown', {key: 'Enter', metaKey: true}));
+
+      sinon.assert.calledOnce(saveStub);
+    });
+  });
+
+  it('disconnecting element reports form is not dirty', () => {
+    element.formName = 'test';
+
+    assert.isFalse(store.dispatch.calledOnce);
+
+    document.body.removeChild(element);
+
+    assert.isTrue(store.dispatch.calledOnce);
+    sinon.assert.calledWith(
+        store.dispatch,
+        {
+          type: 'REPORT_DIRTY_FORM',
+          name: 'test',
+          isDirty: false,
+        },
+    );
+
+    document.body.appendChild(element);
+  });
+
+  it('_processChanges fires change event', async () => {
+    await element.updateComplete;
+
+    const changeStub = sinon.stub();
+    element.addEventListener('change', changeStub);
+
+    element._processChanges();
+
+    sinon.assert.calledOnce(changeStub);
+  });
+
+  it('save button disabled when disabled is true', async () => {
+    // Check that save button is initially disabled.
+    await element.updateComplete;
+
+    const button = element.querySelector('.save-changes');
+
+    assert.isTrue(element.disabled);
+    assert.isTrue(button.disabled);
+
+    element.isDirty = true;
+
+    await element.updateComplete;
+
+    assert.isFalse(element.disabled);
+    assert.isFalse(button.disabled);
+  });
+
+  it('editing form sets isDirty to true or false', async () => {
+    await element.updateComplete;
+
+    assert.isFalse(element.isDirty);
+
+    // User makes some changes.
+    const comment = element.querySelector('#commentText');
+    comment.value = 'Value';
+    comment.dispatchEvent(new Event('keyup'));
+
+    assert.isTrue(element.isDirty);
+
+    // User undoes the changes.
+    comment.value = '';
+    comment.dispatchEvent(new Event('keyup'));
+
+    assert.isFalse(element.isDirty);
+  });
+
+  it('reseting form disables save button', async () => {
+    // Check that save button is initially disabled.
+    assert.isTrue(element.disabled);
+
+    // User makes some changes.
+    element.isDirty = true;
+
+    // Check that save button is not disabled.
+    assert.isFalse(element.disabled);
+
+    // Reset form.
+    await element.updateComplete;
+    await element.reset();
+
+    // Check that save button is still disabled.
+    assert.isTrue(element.disabled);
+  });
+
+  it('save button is enabled if request fails', async () => {
+    // Check that save button is initially disabled.
+    assert.isTrue(element.disabled);
+
+    // User makes some changes.
+    element.isDirty = true;
+
+    // Check that save button is not disabled.
+    assert.isFalse(element.disabled);
+
+    // User submits the change.
+    element.saving = true;
+
+    // Check that save button is disabled.
+    assert.isTrue(element.disabled);
+
+    // Request fails.
+    element.saving = false;
+    element.error = 'error';
+
+    // Check that save button is re-enabled.
+    assert.isFalse(element.disabled);
+  });
+
+  it('delta empty when no changes', async () => {
+    await element.updateComplete;
+    assert.deepEqual(element.delta, {});
+  });
+
+  it('toggling checkbox toggles sendEmail', async () => {
+    element.sendEmail = false;
+
+    await element.updateComplete;
+    const checkbox = element.querySelector('#sendEmail');
+
+    await checkbox.updateComplete;
+
+    checkbox.click();
+    await element.updateComplete;
+
+    assert.equal(checkbox.checked, true);
+    assert.equal(element.sendEmail, true);
+
+    checkbox.click();
+    await element.updateComplete;
+
+    assert.equal(checkbox.checked, false);
+    assert.equal(element.sendEmail, false);
+
+    checkbox.click();
+    await element.updateComplete;
+
+    assert.equal(checkbox.checked, true);
+    assert.equal(element.sendEmail, true);
+  });
+
+  it('changing status produces delta change (lit-element)', async () => {
+    element.statuses = [
+      {'status': 'New'},
+      {'status': 'Old'},
+      {'status': 'Test'},
+    ];
+    element.status = 'New';
+
+    await element.updateComplete;
+
+    const statusComponent = element.querySelector('#statusInput');
+    statusComponent.status = 'Old';
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      status: 'Old',
+    });
+  });
+
+  it('changing owner produces delta change (React)', async () => {
+    element.ownerName = 'initial-owner@bird.org';
+    await element.updateComplete;
+
+    const input = element.querySelector('#ownerInput');
+    enterInput(input, 'new-owner@bird.org');
+    await element.updateComplete;
+
+    const expected = {ownerRef: {displayName: 'new-owner@bird.org'}};
+    assert.deepEqual(element.delta, expected);
+  });
+
+  it('adding CC produces delta change (React)', async () => {
+    element.cc = [
+      {displayName: 'initial-cc@bird.org', userId: '1234'},
+    ];
+
+    await element.updateComplete;
+
+    const input = element.querySelector('#ccInput');
+    enterInput(input, 'another@bird.org');
+    await element.updateComplete;
+
+    const expected = {
+      ccRefsAdd: [{displayName: 'another@bird.org'}],
+      ccRefsRemove: [{displayName: 'initial-cc@bird.org'}],
+    };
+    assert.deepEqual(element.delta, expected);
+  });
+
+  it('invalid status throws', async () => {
+    element.statuses = [
+      {'status': 'New'},
+      {'status': 'Old'},
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'Duplicate';
+
+    await element.updateComplete;
+
+    const statusComponent = element.querySelector('#statusInput');
+    statusComponent.shadowRoot.querySelector('#mergedIntoInput').value = 'xx';
+    assert.deepEqual(element.delta, {});
+    assert.equal(
+        element.error,
+        'Invalid issue ref: xx. Expected [projectName:]issueId.');
+  });
+
+  it('cannot block an issue on itself', async () => {
+    element.projectName = 'proj';
+    element.issueRef = {projectName: 'proj', localId: 123};
+
+    await element.updateComplete;
+
+    for (const fieldName of ['blockedOn', 'blocking']) {
+      const input =
+        element.querySelector(`#${fieldName}Input`);
+      enterInput(input, '123');
+      await element.updateComplete;
+
+      assert.deepEqual(element.delta, {});
+      assert.equal(
+          element.error,
+          `Invalid issue ref: 123. Cannot merge or block an issue on itself.`);
+      fireEvent.keyDown(input, {key: 'Backspace', code: 'Backspace'});
+      await element.updateComplete;
+
+      enterInput(input, 'proj:123');
+      await element.updateComplete;
+
+      assert.deepEqual(element.delta, {});
+      assert.equal(
+          element.error,
+          `Invalid issue ref: proj:123. ` +
+        'Cannot merge or block an issue on itself.');
+      fireEvent.keyDown(input, {key: 'Backspace', code: 'Backspace'});
+      await element.updateComplete;
+
+      enterInput(input, 'proj2:123');
+      await element.updateComplete;
+
+      assert.notDeepEqual(element.delta, {});
+      assert.equal(element.error, '');
+
+      fireEvent.keyDown(input, {key: 'Backspace', code: 'Backspace'});
+      await element.updateComplete;
+    }
+  });
+
+  it('cannot merge an issue into itself', async () => {
+    element.statuses = [
+      {'status': 'New'},
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'New';
+    element.projectName = 'proj';
+    element.issueRef = {projectName: 'proj', localId: 123};
+
+    await element.updateComplete;
+
+    const statusComponent = element.querySelector('#statusInput');
+    const root = statusComponent.shadowRoot;
+    const statusInput = root.querySelector('#statusInput');
+    statusInput.value = 'Duplicate';
+    statusInput.dispatchEvent(new Event('change'));
+
+    await element.updateComplete;
+
+    root.querySelector('#mergedIntoInput').value = 'proj:123';
+    assert.deepEqual(element.delta, {});
+    assert.equal(
+        element.error,
+        `Invalid issue ref: proj:123. Cannot merge or block an issue on itself.`);
+
+    root.querySelector('#mergedIntoInput').value = '123';
+    assert.deepEqual(element.delta, {});
+    assert.equal(
+        element.error,
+        `Invalid issue ref: 123. Cannot merge or block an issue on itself.`);
+
+    root.querySelector('#mergedIntoInput').value = 'proj2:123';
+    assert.notDeepEqual(element.delta, {});
+    assert.equal(element.error, '');
+  });
+
+  it('cannot set invalid emails', async () => {
+    await element.updateComplete;
+
+    const ccInput = element.querySelector('#ccInput');
+    enterInput(ccInput, 'invalid!email');
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {});
+    assert.equal(
+        element.error,
+        `Invalid email address: invalid!email`);
+
+    const input = element.querySelector('#ownerInput');
+    enterInput(input, 'invalid!email2');
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {});
+    assert.equal(
+        element.error,
+        `Invalid email address: invalid!email2`);
+  });
+
+  it('can remove invalid values', async () => {
+    element.projectName = 'proj';
+    element.issueRef = {projectName: 'proj', localId: 123};
+
+    element.statuses = [
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'Duplicate';
+    element.mergedInto = element.issueRef;
+
+    element.blockedOn = [element.issueRef];
+    element.blocking = [element.issueRef];
+
+    await element.updateComplete;
+
+    const blockedOnInput = element.querySelector('#blockedOnInput');
+    const blockingInput = element.querySelector('#blockingInput');
+    const statusInput = element.querySelector('#statusInput');
+
+    await element.updateComplete;
+
+    const mergedIntoInput =
+      statusInput.shadowRoot.querySelector('#mergedIntoInput');
+
+    fireEvent.keyDown(blockedOnInput, {key: 'Backspace', code: 'Backspace'});
+    await element.updateComplete;
+    fireEvent.keyDown(blockingInput, {key: 'Backspace', code: 'Backspace'});
+    await element.updateComplete;
+    mergedIntoInput.value = 'proj:124';
+    await element.updateComplete;
+
+    assert.deepEqual(
+        element.delta,
+        {
+          blockedOnRefsRemove: [{projectName: 'proj', localId: 123}],
+          blockingRefsRemove: [{projectName: 'proj', localId: 123}],
+          mergedIntoRef: {projectName: 'proj', localId: 124},
+        });
+    assert.equal(element.error, '');
+  });
+
+  it('not changing status produces no delta', async () => {
+    element.statuses = [
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'Duplicate';
+
+    element.mergedInto = {
+      projectName: 'chromium',
+      localId: 1234,
+    };
+
+    element.projectName = 'chromium';
+
+    await element.updateComplete;
+    await element.updateComplete; // Merged input updates its value.
+
+    assert.deepEqual(element.delta, {});
+  });
+
+  it('changing status to duplicate produces delta change', async () => {
+    element.statuses = [
+      {'status': 'New'},
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'New';
+
+    await element.updateComplete;
+
+    const statusComponent = element.querySelector(
+        '#statusInput');
+    const root = statusComponent.shadowRoot;
+    const statusInput = root.querySelector('#statusInput');
+    statusInput.value = 'Duplicate';
+    statusInput.dispatchEvent(new Event('change'));
+
+    await element.updateComplete;
+
+    root.querySelector('#mergedIntoInput').value = 'chromium:1234';
+    assert.deepEqual(element.delta, {
+      status: 'Duplicate',
+      mergedIntoRef: {
+        projectName: 'chromium',
+        localId: 1234,
+      },
+    });
+  });
+
+  it('changing summary produces delta change', async () => {
+    element.summary = 'Old summary';
+
+    await element.updateComplete;
+
+    element.querySelector(
+        '#summaryInput').value = 'newfangled fancy summary';
+    assert.deepEqual(element.delta, {
+      summary: 'newfangled fancy summary',
+    });
+  });
+
+  it('custom fields the user cannot edit should be hidden', async () => {
+    element.projectName = 'proj';
+    const fieldName = 'projects/proj/fieldDefs/1';
+    const restrictedFieldName = 'projects/proj/fieldDefs/2';
+    element._permissions = {
+      [fieldName]: {permissions: [FIELD_DEF_VALUE_EDIT]},
+      [restrictedFieldName]: {permissions: []}};
+    element.fieldDefs = [
+      {
+        fieldRef: {
+          fieldName: 'normalFd',
+          fieldId: 1,
+          type: 'ENUM_TYPE',
+        },
+      },
+      {
+        fieldRef: {
+          fieldName: 'cantEditFd',
+          fieldId: 2,
+          type: 'ENUM_TYPE',
+        },
+      },
+    ];
+
+    await element.updateComplete;
+    assert.isFalse(element.querySelector('#normalFdInput').hidden);
+    assert.isTrue(element.querySelector('#cantEditFdInput').hidden);
+  });
+
+  it('changing enum custom fields produces delta', async () => {
+    element.fieldValueMap = new Map([['fakefield', ['prev value']]]);
+    element.fieldDefs = [
+      {
+        fieldRef: {
+          fieldName: 'testField',
+          fieldId: 1,
+          type: 'ENUM_TYPE',
+        },
+      },
+      {
+        fieldRef: {
+          fieldName: 'fakeField',
+          fieldId: 2,
+          type: 'ENUM_TYPE',
+        },
+      },
+    ];
+
+    await element.updateComplete;
+
+    const input1 = element.querySelector('#testFieldInput');
+    const input2 = element.querySelector('#fakeFieldInput');
+
+    input1.values = ['test value'];
+    input2.values = [];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      fieldValsAdd: [
+        {
+          fieldRef: {
+            fieldName: 'testField',
+            fieldId: 1,
+            type: 'ENUM_TYPE',
+          },
+          value: 'test value',
+        },
+      ],
+      fieldValsRemove: [
+        {
+          fieldRef: {
+            fieldName: 'fakeField',
+            fieldId: 2,
+            type: 'ENUM_TYPE',
+          },
+          value: 'prev value',
+        },
+      ],
+    });
+  });
+
+  it('changing approvers produces delta', async () => {
+    element.isApproval = true;
+    element.hasApproverPrivileges = true;
+    element.approvers = [
+      {displayName: 'foo@example.com', userId: '1'},
+      {displayName: 'bar@example.com', userId: '2'},
+      {displayName: 'baz@example.com', userId: '3'},
+    ];
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    element.querySelector('#approversInput').values =
+        ['chicken@example.com', 'foo@example.com', 'dog@example.com'];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      approverRefsAdd: [
+        {displayName: 'chicken@example.com'},
+        {displayName: 'dog@example.com'},
+      ],
+      approverRefsRemove: [
+        {displayName: 'bar@example.com'},
+        {displayName: 'baz@example.com'},
+      ],
+    });
+  });
+
+  it('changing blockedon produces delta change (React)', async () => {
+    element.blockedOn = [
+      {projectName: 'chromium', localId: '1234'},
+      {projectName: 'monorail', localId: '4567'},
+    ];
+    element.projectName = 'chromium';
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    const input = element.querySelector('#blockedOnInput');
+
+    fireEvent.keyDown(input, {key: 'Backspace', code: 'Backspace'});
+    await element.updateComplete;
+
+    enterInput(input, 'v8:5678');
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      blockedOnRefsAdd: [{
+        projectName: 'v8',
+        localId: 5678,
+      }],
+      blockedOnRefsRemove: [{
+        projectName: 'monorail',
+        localId: 4567,
+      }],
+    });
+  });
+
+  it('_optionsForField computes options', () => {
+    const optionsPerEnumField = new Map([
+      ['enumfield', [{optionName: 'one'}, {optionName: 'two'}]],
+    ]);
+    assert.deepEqual(
+        element._optionsForField(optionsPerEnumField, new Map(), 'enumField'), [
+          {
+            optionName: 'one',
+          },
+          {
+            optionName: 'two',
+          },
+        ]);
+  });
+
+  it('changing enum fields produces delta', async () => {
+    element.fieldDefs = [
+      {
+        fieldRef: {
+          fieldName: 'enumField',
+          fieldId: 1,
+          type: 'ENUM_TYPE',
+        },
+        isMultivalued: true,
+      },
+    ];
+
+    element.optionsPerEnumField = new Map([
+      ['enumfield', [{optionName: 'one'}, {optionName: 'two'}]],
+    ]);
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    element.querySelector(
+        '#enumFieldInput').values = ['one', 'two'];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      fieldValsAdd: [
+        {
+          fieldRef: {
+            fieldName: 'enumField',
+            fieldId: 1,
+            type: 'ENUM_TYPE',
+          },
+          value: 'one',
+        },
+        {
+          fieldRef: {
+            fieldName: 'enumField',
+            fieldId: 1,
+            type: 'ENUM_TYPE',
+          },
+          value: 'two',
+        },
+      ],
+    });
+  });
+
+  it('changing multiple single valued enum fields', async () => {
+    element.fieldDefs = [
+      {
+        fieldRef: {
+          fieldName: 'enumField',
+          fieldId: 1,
+          type: 'ENUM_TYPE',
+        },
+      },
+      {
+        fieldRef: {
+          fieldName: 'enumField2',
+          fieldId: 2,
+          type: 'ENUM_TYPE',
+        },
+      },
+    ];
+
+    element.optionsPerEnumField = new Map([
+      ['enumfield', [{optionName: 'one'}, {optionName: 'two'}]],
+      ['enumfield2', [{optionName: 'three'}, {optionName: 'four'}]],
+    ]);
+
+    await element.updateComplete;
+
+    element.querySelector('#enumFieldInput').values = ['two'];
+    element.querySelector('#enumField2Input').values = ['three'];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      fieldValsAdd: [
+        {
+          fieldRef: {
+            fieldName: 'enumField',
+            fieldId: 1,
+            type: 'ENUM_TYPE',
+          },
+          value: 'two',
+        },
+        {
+          fieldRef: {
+            fieldName: 'enumField2',
+            fieldId: 2,
+            type: 'ENUM_TYPE',
+          },
+          value: 'three',
+        },
+      ],
+    });
+  });
+
+  it('adding components produces delta', async () => {
+    await element.updateComplete;
+
+    element.isApproval = false;
+    element.issuePermissions = [ISSUE_EDIT_PERMISSION];
+
+    element.components = [];
+
+    await element.updateComplete;
+
+    element._values.components = ['Hello>World'];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      compRefsAdd: [
+        {path: 'Hello>World'},
+      ],
+    });
+
+    element._values.components = ['Hello>World', 'Test', 'Multi'];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      compRefsAdd: [
+        {path: 'Hello>World'},
+        {path: 'Test'},
+        {path: 'Multi'},
+      ],
+    });
+
+    element._values.components = [];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {});
+  });
+
+  it('removing components produces delta', async () => {
+    await element.updateComplete;
+
+    element.isApproval = false;
+    element.issuePermissions = [ISSUE_EDIT_PERMISSION];
+
+    element.components = [{path: 'Hello>World'}];
+
+    await element.updateComplete;
+
+    element._values.components = [];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element.delta, {
+      compRefsRemove: [
+        {path: 'Hello>World'},
+      ],
+    });
+  });
+
+  it('approver input appears when user has privileges', async () => {
+    assert.isNull(element.querySelector('#approversInput'));
+    element.isApproval = true;
+    element.hasApproverPrivileges = true;
+
+    await element.updateComplete;
+
+    assert.isNotNull(element.querySelector('#approversInput'));
+  });
+
+  it('reset sets controlled values to default', async () => {
+    element.ownerName = 'burb@bird.com';
+    element.cc = [
+      {displayName: 'flamingo@bird.com', userId: '1234'},
+      {displayName: 'penguin@bird.com', userId: '5678'},
+    ];
+    element.components = [{path: 'Bird>Penguin'}];
+    element.labelNames = ['chickadee-chirp'];
+    element.blockedOn = [{localId: 1234, projectName: 'project'}];
+    element.blocking = [{localId: 5678, projectName: 'other-project'}];
+    element.projectName = 'project';
+
+    // Update cycle is needed because <mr-edit-metadata> initializes
+    // this.values in updated().
+    await element.updateComplete;
+
+    const initialValues = {
+      owner: 'burb@bird.com',
+      cc: ['flamingo@bird.com', 'penguin@bird.com'],
+      components: ['Bird>Penguin'],
+      labels: ['chickadee-chirp'],
+      blockedOn: ['1234'],
+      blocking: ['other-project:5678'],
+    };
+
+    assert.deepEqual(element._values, initialValues);
+
+    element._values = {
+      owner: 'newburb@hello.com',
+      cc: ['noburbs@wings.com'],
+    };
+    element.reset();
+
+    assert.deepEqual(element._values, initialValues);
+  })
+
+  it('reset empties form values', async () => {
+    element.fieldDefs = [
+      {
+        fieldRef: {
+          fieldName: 'testField',
+          fieldId: 1,
+          type: 'ENUM_TYPE',
+        },
+      },
+      {
+        fieldRef: {
+          fieldName: 'fakeField',
+          fieldId: 2,
+          type: 'ENUM_TYPE',
+        },
+      },
+    ];
+
+    await element.updateComplete;
+
+    const uploader = element.querySelector('mr-upload');
+    uploader.files = [
+      {name: 'test.png'},
+      {name: 'rutabaga.png'},
+    ];
+
+    element.querySelector('#testFieldInput').values = 'testy test';
+    element.querySelector('#fakeFieldInput').values = 'hello world';
+
+    await element.reset();
+
+    assert.lengthOf(element.querySelector('#testFieldInput').value, 0);
+    assert.lengthOf(element.querySelector('#fakeFieldInput').value, 0);
+    assert.lengthOf(uploader.files, 0);
+  });
+
+  it('reset results in empty delta', async () => {
+    element.ownerName = 'goose@bird.org';
+    await element.updateComplete;
+
+    element._values.owner = 'penguin@bird.org';
+    const expected = {ownerRef: {displayName: 'penguin@bird.org'}};
+    assert.deepEqual(element.delta, expected);
+
+    await element.reset();
+    assert.deepEqual(element.delta, {});
+  });
+
+  it('edit issue permissions', async () => {
+    const allFields = ['summary', 'status', 'owner', 'cc'];
+    const testCases = [
+      {permissions: [], nonNull: []},
+      {permissions: [ISSUE_EDIT_PERMISSION], nonNull: allFields},
+      {permissions: [ISSUE_EDIT_SUMMARY_PERMISSION], nonNull: ['summary']},
+      {permissions: [ISSUE_EDIT_STATUS_PERMISSION], nonNull: ['status']},
+      {permissions: [ISSUE_EDIT_OWNER_PERMISSION], nonNull: ['owner']},
+      {permissions: [ISSUE_EDIT_CC_PERMISSION], nonNull: ['cc']},
+    ];
+    element.statuses = [{'status': 'Foo'}];
+
+    for (const testCase of testCases) {
+      element.issuePermissions = testCase.permissions;
+      await element.updateComplete;
+
+      allFields.forEach((fieldName) => {
+        const field = element.querySelector(`#${fieldName}Input`);
+        if (testCase.nonNull.includes(fieldName)) {
+          assert.isNotNull(field);
+        } else {
+          assert.isNull(field);
+        }
+      });
+    }
+  });
+
+  it('duplicate issue is rendered correctly', async () => {
+    element.statuses = [
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'Duplicate';
+    element.projectName = 'chromium';
+    element.mergedInto = {
+      projectName: 'chromium',
+      localId: 1234,
+    };
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    const statusComponent = element.querySelector('#statusInput');
+    const root = statusComponent.shadowRoot;
+    assert.equal(
+        root.querySelector('#mergedIntoInput').value, '1234');
+  });
+
+  it('duplicate issue on different project is rendered correctly', async () => {
+    element.statuses = [
+      {'status': 'Duplicate'},
+    ];
+    element.status = 'Duplicate';
+    element.projectName = 'chromium';
+    element.mergedInto = {
+      projectName: 'monorail',
+      localId: 1234,
+    };
+
+    await element.updateComplete;
+    await element.updateComplete;
+
+    const statusComponent = element.querySelector('#statusInput');
+    const root = statusComponent.shadowRoot;
+    assert.equal(
+        root.querySelector('#mergedIntoInput').value, 'monorail:1234');
+  });
+
+  it('filter out deleted users', async () => {
+    element.cc = [
+      {displayName: 'test@example.com', userId: '1234'},
+      {displayName: 'a_deleted_user'},
+      {displayName: 'someone@example.com', userId: '5678'},
+    ];
+
+    await element.updateComplete;
+
+    assert.deepEqual(element._values.cc, [
+      'test@example.com',
+      'someone@example.com',
+    ]);
+  });
+
+  it('renders valid markdown description with preview', async () => {
+    await element.updateComplete;
+
+    element.prefs = new Map([['render_markdown', true]]);
+    element.projectName = 'monkeyrail';
+    sinon.stub(element, 'getCommentContent').returns('# h1');
+
+    await element.updateComplete;
+
+    assert.isTrue(element._renderMarkdown);
+
+    const previewMarkdown = element.querySelector('.markdown-preview');
+    assert.isNotNull(previewMarkdown);
+
+    const headerText = previewMarkdown.querySelector('h1').textContent;
+    assert.equal(headerText, 'h1');
+  });
+
+  it('does not show preview when markdown is disabled', async () => {
+    element.prefs = new Map([['render_markdown', false]]);
+    element.projectName = 'monkeyrail';
+    sinon.stub(element, 'getCommentContent').returns('# h1');
+
+    await element.updateComplete;
+
+    const previewMarkdown = element.querySelector('.markdown-preview');
+    assert.isNull(previewMarkdown);
+  });
+
+  it('does not show preview when no input', async () => {
+    element.prefs = new Map([['render_markdown', true]]);
+    element.projectName = 'monkeyrail';
+    sinon.stub(element, 'getCommentContent').returns('');
+
+    await element.updateComplete;
+
+    const previewMarkdown = element.querySelector('.markdown-preview');
+    assert.isNull(previewMarkdown);
+  });
+});
+
diff --git a/static_src/elements/issue-detail/metadata/mr-metadata/mr-field-values.js b/static_src/elements/issue-detail/metadata/mr-metadata/mr-field-values.js
new file mode 100644
index 0000000..ba68c39
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-metadata/mr-field-values.js
@@ -0,0 +1,58 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import {fieldTypes, EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import {displayNameToUserRef} from 'shared/convertersV0.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+/**
+ * `<mr-field-values>`
+ *
+ * Takes in a list of field values and a single fieldDef and displays them
+ * according to their type.
+ *
+ */
+export class MrFieldValues extends LitElement {
+  /** @override */
+  static get styles() {
+    return SHARED_STYLES;
+  }
+
+  /** @override */
+  render() {
+    if (!this.values || !this.values.length) {
+      return html`${EMPTY_FIELD_VALUE}`;
+    }
+    switch (this.type) {
+      case fieldTypes.URL_TYPE:
+        return html`${this.values.map((value) => html`
+          <a href=${value} target="_blank" rel="nofollow">${value}</a>
+        `)}`;
+      case fieldTypes.USER_TYPE:
+        return html`${this.values.map((value) => html`
+          <mr-user-link .userRef=${displayNameToUserRef(value)}></mr-user-link>
+        `)}`;
+      default:
+        return html`${this.values.map((value, i) => html`
+          <a href="/p/${this.projectName}/issues/list?q=${this.name}=&quot;${value}&quot;">
+            ${value}</a>${this.values.length - 1 > i ? ', ' : ''}
+        `)}`;
+    }
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      name: {type: String},
+      type: {type: Object},
+      projectName: {type: String},
+      values: {type: Array},
+    };
+  }
+}
+
+customElements.define('mr-field-values', MrFieldValues);
diff --git a/static_src/elements/issue-detail/metadata/mr-metadata/mr-field-values.test.js b/static_src/elements/issue-detail/metadata/mr-metadata/mr-field-values.test.js
new file mode 100644
index 0000000..e334841
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-metadata/mr-field-values.test.js
@@ -0,0 +1,86 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrFieldValues} from './mr-field-values.js';
+
+import {fieldTypes} from 'shared/issue-fields.js';
+
+
+let element;
+
+describe('mr-field-values', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-field-values');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrFieldValues);
+  });
+
+  it('renders empty if no values', async () => {
+    element.values = [];
+
+    await element.updateComplete;
+
+    assert.equal('----', element.shadowRoot.textContent.trim());
+  });
+
+  it('renders user links when type is user', async () => {
+    element.type = fieldTypes.USER_TYPE;
+    element.values = ['test@example.com', 'hello@world.com'];
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('mr-user-link');
+
+    await links.updateComplete;
+
+    assert.equal(2, links.length);
+    assert.include(links[0].shadowRoot.textContent, 'test@example.com');
+    assert.include(links[1].shadowRoot.textContent, 'hello@world.com');
+  });
+
+  it('renders URLs when type is url', async () => {
+    element.type = fieldTypes.URL_TYPE;
+    element.values = ['http://hello.world', 'go/link'];
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('a');
+
+    assert.equal(2, links.length);
+    assert.include(links[0].textContent, 'http://hello.world');
+    assert.include(links[0].href, 'http://hello.world');
+    assert.include(links[1].textContent, 'go/link');
+    assert.include(links[1].href, 'go/link');
+  });
+
+  it('renders generic field when field is string', async () => {
+    element.type = fieldTypes.STR_TYPE;
+    element.values = ['blah', 'random value', 'nothing here'];
+    element.name = 'fieldName';
+    element.projectName = 'project';
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('a');
+
+    assert.equal(3, links.length);
+    assert.include(links[0].textContent, 'blah');
+    assert.include(links[0].href,
+        '/p/project/issues/list?q=fieldName=%22blah%22');
+    assert.include(links[1].textContent, 'random value');
+    assert.include(links[1].href,
+        '/p/project/issues/list?q=fieldName=%22random%20value%22');
+    assert.include(links[2].textContent, 'nothing here');
+    assert.include(links[2].href,
+        '/p/project/issues/list?q=fieldName=%22nothing%20here%22');
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-metadata/mr-issue-metadata.js b/static_src/elements/issue-detail/metadata/mr-metadata/mr-issue-metadata.js
new file mode 100644
index 0000000..60d570c
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-metadata/mr-issue-metadata.js
@@ -0,0 +1,352 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import 'elements/framework/mr-star/mr-issue-star.js';
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import 'elements/framework/links/mr-hotlist-link/mr-hotlist-link.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {pluralize} from 'shared/helpers.js';
+import './mr-metadata.js';
+
+
+/**
+ * `<mr-issue-metadata>`
+ *
+ * The metadata view for a single issue. Contains information such as the owner.
+ *
+ */
+export class MrIssueMetadata extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          box-sizing: border-box;
+          padding: 0.25em 8px;
+          max-width: 100%;
+          display: block;
+        }
+        h3 {
+          display: block;
+          font-size: var(--chops-main-font-size);
+          margin: 0;
+          line-height: 160%;
+          width: 40%;
+          height: 100%;
+          overflow: ellipsis;
+          flex-grow: 0;
+          flex-shrink: 0;
+        }
+        a.label {
+          color: hsl(120, 100%, 25%);
+          text-decoration: none;
+        }
+        a.label[data-derived] {
+          font-style: italic;
+        }
+        button.linkify {
+          display: flex;
+          align-items: center;
+          text-decoration: none;
+          padding: 0.25em 0;
+        }
+        button.linkify i.material-icons {
+          margin-right: 4px;
+          font-size: var(--chops-icon-font-size);
+        }
+        mr-hotlist-link {
+          text-overflow: ellipsis;
+          overflow: hidden;
+          display: block;
+          width: 100%;
+        }
+        .bottom-section-cell, .labels-container {
+          padding: 0.5em 4px;
+          width: 100%;
+          box-sizing: border-box;
+        }
+        .bottom-section-cell {
+          display: flex;
+          flex-direction: row;
+          flex-wrap: nowrap;
+          align-items: flex-start;
+        }
+        .bottom-section-content {
+          max-width: 60%;
+        }
+        .star-line {
+          width: 100%;
+          text-align: center;
+          display: flex;
+          align-items: center;
+          justify-content: center;
+        }
+        mr-issue-star {
+          margin-right: 4px;
+          padding-bottom: 2px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    const hotlistsByRole = this._hotlistsByRole;
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <div class="star-line">
+        <mr-issue-star
+          .issueRef=${this.issueRef}
+        ></mr-issue-star>
+        Starred by ${this.issue.starCount || 0} ${pluralize(this.issue.starCount, 'user')}
+      </div>
+      <mr-metadata
+        aria-label="Issue Metadata"
+        .owner=${this.issue.ownerRef}
+        .cc=${this.issue.ccRefs}
+        .issueStatus=${this.issue.statusRef}
+        .components=${this._components}
+        .fieldDefs=${this._fieldDefs}
+        .mergedInto=${this.mergedInto}
+        .modifiedTimestamp=${this.issue.modifiedTimestamp}
+      ></mr-metadata>
+
+      <div class="labels-container">
+        ${this.issue.labelRefs && this.issue.labelRefs.map((label) => html`
+          <a
+            title="${_labelTitle(this.labelDefMap, label)}"
+            href="/p/${this.issueRef.projectName}/issues/list?q=label:${label.label}"
+            class="label"
+            ?data-derived=${label.isDerived}
+          >${label.label}</a>
+          <br>
+        `)}
+      </div>
+
+      ${this.sortedBlockedOn.length ? html`
+        <div class="bottom-section-cell">
+          <h3>BlockedOn:</h3>
+            <div class="bottom-section-content">
+            ${this.sortedBlockedOn.map((issue) => html`
+              <mr-issue-link
+                .projectName=${this.issueRef.projectName}
+                .issue=${issue}
+              >
+              </mr-issue-link>
+              <br />
+            `)}
+            <button
+              class="linkify"
+              @click=${this.openViewBlockedOn}
+            >
+              <i class="material-icons" role="presentation">list</i>
+              View details
+            </button>
+          </div>
+        </div>
+      `: ''}
+
+      ${this.blocking.length ? html`
+        <div class="bottom-section-cell">
+          <h3>Blocking:</h3>
+          <div class="bottom-section-content">
+            ${this.blocking.map((issue) => html`
+              <mr-issue-link
+                .projectName=${this.issueRef.projectName}
+                .issue=${issue}
+              >
+              </mr-issue-link>
+              <br />
+            `)}
+          </div>
+        </div>
+      `: ''}
+
+      ${this._userId ? html`
+        <div class="bottom-section-cell">
+          <h3>Your Hotlists:</h3>
+          <div class="bottom-section-content" id="user-hotlists">
+            ${this._renderHotlists(hotlistsByRole.user)}
+            <button
+              class="linkify"
+              @click=${this.openUpdateHotlists}
+            >
+              <i class="material-icons" role="presentation">create</i> Update your hotlists
+            </button>
+          </div>
+        </div>
+      `: ''}
+
+      ${hotlistsByRole.participants.length ? html`
+        <div class="bottom-section-cell">
+          <h3>Participant's Hotlists:</h3>
+          <div class="bottom-section-content">
+            ${this._renderHotlists(hotlistsByRole.participants)}
+          </div>
+        </div>
+      ` : ''}
+
+      ${hotlistsByRole.others.length ? html`
+        <div class="bottom-section-cell">
+          <h3>Other Hotlists:</h3>
+          <div class="bottom-section-content">
+            ${this._renderHotlists(hotlistsByRole.others)}
+          </div>
+        </div>
+      ` : ''}
+    `;
+  }
+
+  /**
+   * Helper to render hotlists.
+   * @param {Array<Hotlist>} hotlists
+   * @return {Array<TemplateResult>}
+   * @private
+   */
+  _renderHotlists(hotlists) {
+    return hotlists.map((hotlist) => html`
+      <mr-hotlist-link .hotlist=${hotlist}></mr-hotlist-link>
+    `);
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issue: {type: Object},
+      issueRef: {type: Object},
+      projectConfig: String,
+      user: {type: Object},
+      issueHotlists: {type: Array},
+      blocking: {type: Array},
+      sortedBlockedOn: {type: Array},
+      relatedIssues: {type: Object},
+      labelDefMap: {type: Object},
+      _components: {type: Array},
+      _fieldDefs: {type: Array},
+      _type: {type: String},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.issue = issueV0.viewedIssue(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.user = userV0.currentUser(state);
+    this.projectConfig = projectV0.viewedConfig(state);
+    this.blocking = issueV0.blockingIssues(state);
+    this.sortedBlockedOn = issueV0.sortedBlockedOn(state);
+    this.mergedInto = issueV0.mergedInto(state);
+    this.relatedIssues = issueV0.relatedIssues(state);
+    this.issueHotlists = issueV0.hotlists(state);
+    this.labelDefMap = projectV0.labelDefMap(state);
+    this._components = issueV0.components(state);
+    this._fieldDefs = issueV0.fieldDefs(state);
+    this._type = issueV0.type(state);
+  }
+
+  /**
+   * @return {string|number} The current user's userId.
+   * @private
+   */
+  get _userId() {
+    return this.user && this.user.userId;
+  }
+
+  /**
+   * @return {Object<string, Array<Hotlist>>}
+   * @private
+   */
+  get _hotlistsByRole() {
+    const issueHotlists = this.issueHotlists;
+    const owner = this.issue && this.issue.ownerRef;
+    const cc = this.issue && this.issue.ccRefs;
+
+    const hotlists = {
+      user: [],
+      participants: [],
+      others: [],
+    };
+    (issueHotlists || []).forEach((hotlist) => {
+      if (hotlist.ownerRef.userId === this._userId) {
+        hotlists.user.push(hotlist);
+      } else if (_userIsParticipant(hotlist.ownerRef, owner, cc)) {
+        hotlists.participants.push(hotlist);
+      } else {
+        hotlists.others.push(hotlist);
+      }
+    });
+    return hotlists;
+  }
+
+  /**
+   * Opens dialog for updating ths issue's hotlists.
+   * @fires CustomEvent#open-dialog
+   */
+  openUpdateHotlists() {
+    this.dispatchEvent(new CustomEvent('open-dialog', {
+      bubbles: true,
+      composed: true,
+      detail: {
+        dialogId: 'update-issue-hotlists',
+      },
+    }));
+  }
+
+  /**
+   * Opens dialog with detailed view of blocked on issues.
+   * @fires CustomEvent#open-dialog
+   */
+  openViewBlockedOn() {
+    this.dispatchEvent(new CustomEvent('open-dialog', {
+      bubbles: true,
+      composed: true,
+      detail: {
+        dialogId: 'reorder-related-issues',
+      },
+    }));
+  }
+}
+
+/**
+ * @param {UserRef} user
+ * @param {UserRef} owner
+ * @param {Array<UserRef>} cc
+ * @return {boolean} Whether a given user is a participant of
+ *   a given hotlist attached to an issue. Used to sort hotlists into
+ *   "My hotlists" and "Other hotlists".
+ * @private
+ */
+function _userIsParticipant(user, owner, cc) {
+  if (owner && owner.userId === user.userId) {
+    return true;
+  }
+  return cc && cc.some((ccUser) => ccUser && ccUser.userId === user.userId);
+}
+
+/**
+ * @param {Map.<string, LabelDef>} labelDefMap
+ * @param {LabelDef} label
+ * @return {string} Tooltip shown to the user when hovering over a
+ *   given label.
+ * @private
+ */
+function _labelTitle(labelDefMap, label) {
+  if (!label) return '';
+  let docstring = '';
+  const key = label.label.toLowerCase();
+  if (labelDefMap && labelDefMap.has(key)) {
+    docstring = labelDefMap.get(key).docstring;
+  }
+  return (label.isDerived ? 'Derived: ' : '') + label.label +
+    (docstring ? ` = ${docstring}` : '');
+}
+
+customElements.define('mr-issue-metadata', MrIssueMetadata);
diff --git a/static_src/elements/issue-detail/metadata/mr-metadata/mr-issue-metadata.test.js b/static_src/elements/issue-detail/metadata/mr-metadata/mr-issue-metadata.test.js
new file mode 100644
index 0000000..c328057
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-metadata/mr-issue-metadata.test.js
@@ -0,0 +1,60 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueMetadata} from './mr-issue-metadata.js';
+
+let element;
+
+describe('mr-issue-metadata', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-metadata');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueMetadata);
+  });
+
+  it('labels render', async () => {
+    element.issue = {
+      labelRefs: [
+        {label: 'test'},
+        {label: 'hello-world', isDerived: true},
+      ],
+    };
+
+    element.labelDefMap = new Map([
+      ['test', {label: 'test', docstring: 'this is a docstring'}],
+    ]);
+
+    await element.updateComplete;
+
+    const labels = element.shadowRoot.querySelectorAll('.label');
+
+    assert.equal(labels.length, 2);
+    assert.equal(labels[0].textContent.trim(), 'test');
+    assert.equal(labels[0].getAttribute('title'), 'test = this is a docstring');
+    assert.isUndefined(labels[0].dataset.derived);
+
+    assert.equal(labels[1].textContent.trim(), 'hello-world');
+    assert.equal(labels[1].getAttribute('title'), 'Derived: hello-world');
+    assert.isDefined(labels[1].dataset.derived);
+  });
+
+  it('update hotlist button is shown to users', async () => {
+    element.user = {userId: 1234};
+    await element.updateComplete;
+    assert.isNotNull(element.shadowRoot.querySelector('#user-hotlists'));
+  });
+
+  it('update hotlist button is not shown to anon', async () => {
+    await element.updateComplete;
+    assert.isNull(element.shadowRoot.querySelector('#user-hotlists'));
+  });
+});
diff --git a/static_src/elements/issue-detail/metadata/mr-metadata/mr-metadata.js b/static_src/elements/issue-detail/metadata/mr-metadata/mr-metadata.js
new file mode 100644
index 0000000..0ce172d
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-metadata/mr-metadata.js
@@ -0,0 +1,357 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+import 'elements/framework/links/mr-issue-link/mr-issue-link.js';
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import 'elements/framework/mr-issue-slo/mr-issue-slo.js';
+
+import * as issueV0 from 'reducers/issueV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import * as userV0 from 'reducers/userV0.js';
+import './mr-field-values.js';
+import {isExperimentEnabled, SLO_EXPERIMENT} from 'shared/experiments.js';
+import {EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import {HARDCODED_FIELD_GROUPS, valuesForField, fieldDefsWithGroup,
+  fieldDefsWithoutGroup} from 'shared/metadata-helpers.js';
+import 'shared/typedef.js';
+import {AVAILABLE_CUES, cueNames, specToCueName,
+  cueNameToSpec} from 'elements/help/mr-cue/cue-helpers.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+
+/**
+ * `<mr-metadata>`
+ *
+ * Generalized metadata components, used for either approvals or issues.
+ *
+ */
+export class MrMetadata extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: table;
+          table-layout: fixed;
+          width: 100%;
+        }
+        td, th {
+          padding: 0.5em 4px;
+          vertical-align: top;
+          text-overflow: ellipsis;
+          overflow: hidden;
+        }
+        td {
+          width: 60%;
+        }
+        td.allow-overflow {
+          overflow: visible;
+        }
+        th {
+          text-align: left;
+          width: 40%;
+        }
+        .group-separator {
+          border-top: var(--chops-normal-border);
+        }
+        .group-title {
+          font-weight: normal;
+          font-style: oblique;
+          border-bottom: var(--chops-normal-border);
+          text-align: center;
+        }
+    `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      ${this._renderBuiltInFields()}
+      ${this._renderCustomFieldGroups()}
+    `;
+  }
+
+  /**
+   * Helper for handling the rendering of built in fields.
+   * @return {Array<TemplateResult>}
+   */
+  _renderBuiltInFields() {
+    return this.builtInFieldSpec.map((fieldName) => {
+      const fieldKey = fieldName.toLowerCase();
+
+      // Adding classes to table rows based on field names makes selecting
+      // rows with specific values easier, for example in tests.
+      let className = `row-${fieldKey}`;
+
+      const cueName = specToCueName(fieldKey);
+      if (cueName) {
+        className = `cue-${cueName}`;
+
+        if (!AVAILABLE_CUES.has(cueName)) return '';
+
+        return html`
+          <tr class=${className}>
+            <td colspan="2">
+              <mr-cue cuePrefName=${cueName}></mr-cue>
+            </td>
+          </tr>
+        `;
+      }
+
+      const isApprovalStatus = fieldKey === 'approvalstatus';
+      const isMergedInto = fieldKey === 'mergedinto';
+
+      const fieldValueTemplate = this._renderBuiltInFieldValue(fieldName);
+
+      if (!fieldValueTemplate) return '';
+
+      // Allow overflow to enable the FedRef popup to expand.
+      // TODO(jeffcarp): Look into a more elegant solution.
+      return html`
+        <tr class=${className}>
+          <th>${isApprovalStatus ? 'Status' : fieldName}:</th>
+          <td class=${isMergedInto ? 'allow-overflow' : ''}>
+            ${fieldValueTemplate}
+          </td>
+        </tr>
+      `;
+    });
+  }
+
+  /**
+   * A helper to display a single built-in field.
+   *
+   * @param {string} fieldName The name of the built in field to render.
+   * @return {TemplateResult|undefined} lit-html template for displaying the
+   *   value of the built in field. If undefined, the rendering code assumes
+   *   that the field should be hidden if empty.
+   */
+  _renderBuiltInFieldValue(fieldName) {
+    // TODO(zhangtiff): Merge with code in shared/issue-fields.js for further
+    // de-duplication.
+    switch (fieldName.toLowerCase()) {
+      case 'approvalstatus':
+        return this.approvalStatus || EMPTY_FIELD_VALUE;
+      case 'approvers':
+        return this.approvers && this.approvers.length ?
+          this.approvers.map((approver) => html`
+            <mr-user-link
+              .userRef=${approver}
+              showAvailabilityIcon
+            ></mr-user-link>
+            <br />
+          `) : EMPTY_FIELD_VALUE;
+      case 'setter':
+        return this.setter ? html`
+          <mr-user-link
+            .userRef=${this.setter}
+            showAvailabilityIcon
+          ></mr-user-link>
+          ` : undefined; // Hide the field when empty.
+      case 'owner':
+        return this.owner ? html`
+          <mr-user-link
+            .userRef=${this.owner}
+            showAvailabilityIcon
+            showAvailabilityText
+          ></mr-user-link>
+          ` : EMPTY_FIELD_VALUE;
+      case 'cc':
+        return this.cc && this.cc.length ?
+          this.cc.map((cc) => html`
+            <mr-user-link
+              .userRef=${cc}
+              showAvailabilityIcon
+            ></mr-user-link>
+            <br />
+          `) : EMPTY_FIELD_VALUE;
+      case 'status':
+        return this.issueStatus ? html`
+          ${this.issueStatus.status} <em>${
+            this.issueStatus.meansOpen ? '(Open)' : '(Closed)'}
+          </em>` : EMPTY_FIELD_VALUE;
+      case 'mergedinto':
+        // TODO(zhangtiff): This should use the project config to determine if a
+        // field allows merging rather than used a hard-coded value.
+        return this.issueStatus && this.issueStatus.status === 'Duplicate' ?
+          html`
+            <mr-issue-link
+              .projectName=${this.issueRef.projectName}
+              .issue=${this.mergedInto}
+            ></mr-issue-link>
+          `: undefined; // Hide the field when empty.
+      case 'components':
+        return (this.components && this.components.length) ?
+          this.components.map((comp) => html`
+            <a
+              href="/p/${this.issueRef.projectName
+                }/issues/list?q=component:${comp.path}"
+              title="${comp.path}${comp.docstring ?
+                ' = ' + comp.docstring : ''}"
+            >
+              ${comp.path}</a><br />
+          `) : EMPTY_FIELD_VALUE;
+      case 'modified':
+        return this.modifiedTimestamp ? html`
+            <chops-timestamp
+              .timestamp=${this.modifiedTimestamp}
+              short
+            ></chops-timestamp>
+          ` : EMPTY_FIELD_VALUE;
+      case 'slo':
+        if (isExperimentEnabled(
+            SLO_EXPERIMENT, this.currentUser, this.queryParams)) {
+          return html`<mr-issue-slo .issue=${this.issue}></mr-issue-slo>`;
+        } else {
+          return;
+        }
+    }
+
+    // Non-existent field.
+    return;
+  }
+
+  /**
+   * Helper for handling the rendering of custom fields defined in a project
+   * config.
+   * @return {TemplateResult} lit-html template.
+   */
+  _renderCustomFieldGroups() {
+    const grouped = fieldDefsWithGroup(this.fieldDefs,
+        this.fieldGroups, this.issueType);
+    const ungrouped = fieldDefsWithoutGroup(this.fieldDefs,
+        this.fieldGroups, this.issueType);
+    return html`
+      ${grouped.map((group) => html`
+        <tr>
+          <th class="group-title" colspan="2">
+            ${group.groupName}
+          </th>
+        </tr>
+        ${this._renderCustomFields(group.fieldDefs)}
+        <tr>
+          <th class="group-separator" colspan="2"></th>
+        </tr>
+      `)}
+
+      ${this._renderCustomFields(ungrouped)}
+    `;
+  }
+
+  /**
+   * Helper for handling the rendering of built in fields.
+   *
+   * @param {Array<FieldDef>} fieldDefs Arrays of configurations Objects
+   *   for fields to render.
+   * @return {Array<TemplateResult>} Array of lit-html templates to render, each
+   *   representing a single table row for a custom field.
+   */
+  _renderCustomFields(fieldDefs) {
+    if (!fieldDefs || !fieldDefs.length) return [];
+    return fieldDefs.map((field) => {
+      const fieldValues = valuesForField(
+          this.fieldValueMap, field.fieldRef.fieldName) || [];
+      return html`
+        <tr ?hidden=${field.isNiche && !fieldValues.length}>
+          <th title=${field.docstring}>${field.fieldRef.fieldName}:</th>
+          <td>
+            <mr-field-values
+              .name=${field.fieldRef.fieldName}
+              .type=${field.fieldRef.type}
+              .values=${fieldValues}
+              .projectName=${this.issueRef.projectName}
+            ></mr-field-values>
+          </td>
+        </tr>
+      `;
+    });
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * An Array of Strings to specify which built in fields to display.
+       */
+      builtInFieldSpec: {type: Array},
+      approvalStatus: {type: Array},
+      approvers: {type: Array},
+      setter: {type: Object},
+      cc: {type: Array},
+      components: {type: Array},
+      fieldDefs: {type: Array},
+      fieldGroups: {type: Array},
+      issue: {type: Object},
+      issueStatus: {type: String},
+      issueType: {type: String},
+      mergedInto: {type: Object},
+      modifiedTimestamp: {type: Number},
+      owner: {type: Object},
+      isApproval: {type: Boolean},
+      issueRef: {type: Object},
+      fieldValueMap: {type: Object},
+      currentUser: {type: Object},
+      queryParams: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.isApproval = false;
+    this.fieldGroups = HARDCODED_FIELD_GROUPS;
+    this.issueRef = {};
+
+    // Default built in fields used by issue metadata.
+    this.builtInFieldSpec = [
+      'Owner', 'CC', cueNameToSpec(cueNames.AVAILABILITY_MSGS),
+      'Status', 'MergedInto', 'Components', 'Modified', 'SLO',
+    ];
+    this.fieldValueMap = new Map();
+
+    this.approvalStatus = undefined;
+    this.approvers = undefined;
+    this.setter = undefined;
+    this.cc = undefined;
+    this.components = undefined;
+    this.fieldDefs = undefined;
+    this.issue = undefined;
+    this.issueStatus = undefined;
+    this.issueType = undefined;
+    this.mergedInto = undefined;
+    this.owner = undefined;
+    this.modifiedTimestamp = undefined;
+    this.currentUser = undefined;
+    this.queryParams = {};
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    // This is set for accessibility. Do not override.
+    this.setAttribute('role', 'table');
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.fieldValueMap = issueV0.fieldValueMap(state);
+    this.issue = issueV0.viewedIssue(state);
+    this.issueType = issueV0.type(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.relatedIssues = issueV0.relatedIssues(state);
+    this.currentUser = userV0.currentUser(state);
+    this.queryParams = sitewide.queryParams(state);
+  }
+}
+
+customElements.define('mr-metadata', MrMetadata);
diff --git a/static_src/elements/issue-detail/metadata/mr-metadata/mr-metadata.test.js b/static_src/elements/issue-detail/metadata/mr-metadata/mr-metadata.test.js
new file mode 100644
index 0000000..d9dcd25
--- /dev/null
+++ b/static_src/elements/issue-detail/metadata/mr-metadata/mr-metadata.test.js
@@ -0,0 +1,345 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrMetadata} from './mr-metadata.js';
+
+import {EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+
+let element;
+
+describe('mr-metadata', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-metadata');
+    document.body.appendChild(element);
+
+    element.issueRef = {projectName: 'proj'};
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrMetadata);
+  });
+
+  it('has table role set', () => {
+    assert.equal(element.getAttribute('role'), 'table');
+  });
+
+  describe('default issue fields', () => {
+    it('renders empty Owner', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-owner');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Owner:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders populated Owner', async () => {
+      element.owner = {displayName: 'test@example.com'};
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-owner');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('mr-user-link');
+
+      assert.equal(labelElement.textContent, 'Owner:');
+      assert.include(dataElement.shadowRoot.textContent.trim(),
+          'test@example.com');
+    });
+
+    it('renders empty CC', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-cc');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'CC:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders multiple CCed users', async () => {
+      element.cc = [
+        {displayName: 'test@example.com'},
+        {displayName: 'hello@example.com'},
+      ];
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-cc');
+      const labelElement = tr.querySelector('th');
+      const dataElements = tr.querySelectorAll('mr-user-link');
+
+      assert.equal(labelElement.textContent, 'CC:');
+      assert.include(dataElements[0].shadowRoot.textContent.trim(),
+          'test@example.com');
+      assert.include(dataElements[1].shadowRoot.textContent.trim(),
+          'hello@example.com');
+    });
+
+    it('renders empty Status', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-status');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Status:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders populated Status', async () => {
+      element.issueStatus = {status: 'Fixed', meansOpen: false};
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-status');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Status:');
+      assert.equal(dataElement.textContent.trim(), 'Fixed (Closed)');
+    });
+
+    it('hides empty MergedInto', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-mergedinto');
+      assert.isNull(tr);
+    });
+
+    it('hides MergedInto when Status is not Duplicate', async () => {
+      element.issueStatus = {status: 'test'};
+      element.mergedInto = {projectName: 'chromium', localId: 22};
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-mergedinto');
+      assert.isNull(tr);
+    });
+
+    it('shows MergedInto when Status is Duplicate', async () => {
+      element.issueStatus = {status: 'Duplicate'};
+      element.mergedInto = {projectName: 'chromium', localId: 22};
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-mergedinto');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('mr-issue-link');
+
+      assert.equal(labelElement.textContent, 'MergedInto:');
+      assert.equal(dataElement.shadowRoot.textContent.trim(),
+          'Issue chromium:22');
+    });
+
+    it('renders empty Components', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-components');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Components:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders multiple Components', async () => {
+      element.components = [
+        {path: 'Test', docstring: 'i got docs'},
+        {path: 'Test>Nothing'},
+      ];
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-components');
+      const labelElement = tr.querySelector('th');
+      const dataElements = tr.querySelectorAll('td > a');
+
+      assert.equal(labelElement.textContent, 'Components:');
+
+      assert.equal(dataElements[0].textContent.trim(), 'Test');
+      assert.equal(dataElements[0].title, 'Test = i got docs');
+
+      assert.equal(dataElements[1].textContent.trim(), 'Test>Nothing');
+      assert.equal(dataElements[1].title, 'Test>Nothing');
+    });
+
+    it('renders empty Modified', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-modified');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Modified:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders populated Modified', async () => {
+      element.modifiedTimestamp = 1234;
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-modified');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('chops-timestamp');
+
+      assert.equal(labelElement.textContent, 'Modified:');
+      assert.equal(dataElement.timestamp, 1234);
+    });
+
+    it('does not render SLO if user not in experiment', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-slo');
+      assert.isNull(tr);
+    });
+
+    it('renders SLO if user in experiment', async () => {
+      element.currentUser = {displayName: 'jessan@google.com'};
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-slo');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('mr-issue-slo');
+
+      assert.equal(labelElement.textContent, 'SLO:');
+      assert.equal(dataElement.shadowRoot.textContent.trim(), 'N/A');
+    });
+  });
+
+  describe('approval fields', () => {
+    beforeEach(() => {
+      element.builtInFieldSpec = ['ApprovalStatus', 'Approvers', 'Setter',
+        'cue.availability_msgs'];
+    });
+
+    it('renders empty ApprovalStatus', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-approvalstatus');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Status:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders populated ApprovalStatus', async () => {
+      element.approvalStatus = 'Approved';
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-approvalstatus');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Status:');
+      assert.equal(dataElement.textContent.trim(), 'Approved');
+    });
+
+    it('renders empty Approvers', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-approvers');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'Approvers:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('renders multiple Approvers', async () => {
+      element.approvers = [
+        {displayName: 'test@example.com'},
+        {displayName: 'hello@example.com'},
+      ];
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-approvers');
+      const labelElement = tr.querySelector('th');
+      const dataElements = tr.querySelectorAll('mr-user-link');
+
+      assert.equal(labelElement.textContent, 'Approvers:');
+      assert.include(dataElements[0].shadowRoot.textContent.trim(),
+          'test@example.com');
+      assert.include(dataElements[1].shadowRoot.textContent.trim(),
+          'hello@example.com');
+    });
+
+    it('hides empty Setter', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-setter');
+
+      assert.isNull(tr);
+    });
+
+    it('renders populated Setter', async () => {
+      element.setter = {displayName: 'test@example.com'};
+
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-setter');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('mr-user-link');
+
+      assert.equal(labelElement.textContent, 'Setter:');
+      assert.include(dataElement.shadowRoot.textContent.trim(),
+          'test@example.com');
+    });
+
+    it('renders cue.availability_msgs', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector(
+          'tr.cue-availability_msgs');
+      const cueElement = tr.querySelector('mr-cue');
+
+      assert.isDefined(cueElement);
+    });
+  });
+
+  describe('custom config', () => {
+    beforeEach(() => {
+      element.builtInFieldSpec = ['owner', 'fakefield'];
+    });
+
+    it('owner still renders when lowercase', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-owner');
+      const labelElement = tr.querySelector('th');
+      const dataElement = tr.querySelector('td');
+
+      assert.equal(labelElement.textContent, 'owner:');
+      assert.equal(dataElement.textContent.trim(), EMPTY_FIELD_VALUE);
+    });
+
+    it('fakefield does not render', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.row-fakefield');
+
+      assert.isNull(tr);
+    });
+
+    it('cue.availability_msgs does not render when not configured', async () => {
+      await element.updateComplete;
+
+      const tr = element.shadowRoot.querySelector('tr.cue-availability_msgs');
+
+      assert.isNull(tr);
+    });
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-approval-card/mr-approval-card.js b/static_src/elements/issue-detail/mr-approval-card/mr-approval-card.js
new file mode 100644
index 0000000..2d74c10
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-approval-card/mr-approval-card.js
@@ -0,0 +1,452 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import 'elements/chops/chops-collapse/chops-collapse.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as ui from 'reducers/ui.js';
+import {fieldTypes} from 'shared/issue-fields.js';
+import 'elements/framework/mr-comment-content/mr-description.js';
+import '../mr-comment-list/mr-comment-list.js';
+import 'elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.js';
+import 'elements/issue-detail/metadata/mr-metadata/mr-metadata.js';
+import {APPROVER_RESTRICTED_STATUSES, STATUS_ENUM_TO_TEXT, TEXT_TO_STATUS_ENUM,
+  STATUS_CLASS_MAP, CLASS_ICON_MAP, APPROVAL_STATUSES,
+} from 'shared/consts/approval.js';
+import {commentListToDescriptionList} from 'shared/convertersV0.js';
+import {cueNames, cueNameToSpec} from 'elements/help/mr-cue/cue-helpers.js';
+
+
+/**
+ * @type {Array<string>} The list of built in metadata fields to show on
+ *   issue approvals.
+ */
+const APPROVAL_METADATA_FIELDS = ['ApprovalStatus', 'Approvers', 'Setter',
+  cueNameToSpec(cueNames.AVAILABILITY_MSGS)];
+
+/**
+ * `<mr-approval-card>`
+ *
+ * This element shows a card for a single approval.
+ *
+ */
+export class MrApprovalCard extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <style>
+        mr-approval-card {
+          width: 100%;
+          background-color: var(--chops-white);
+          font-size: var(--chops-main-font-size);
+          border-bottom: var(--chops-normal-border);
+          box-sizing: border-box;
+          display: block;
+          border-left: 4px solid var(--approval-bg-color);
+
+          /* Default styles are for the NotSet/NeedsReview case. */
+          --approval-bg-color: var(--chops-purple-50);
+          --approval-accent-color: var(--chops-purple-700);
+        }
+        mr-approval-card.status-na {
+          --approval-bg-color: hsl(227, 20%, 92%);
+          --approval-accent-color: hsl(227, 80%, 40%);
+        }
+        mr-approval-card.status-approved {
+          --approval-bg-color: hsl(78, 55%, 90%);
+          --approval-accent-color: hsl(78, 100%, 30%);
+        }
+        mr-approval-card.status-pending {
+          --approval-bg-color: hsl(40, 75%, 90%);
+          --approval-accent-color: hsl(33, 100%, 39%);
+        }
+        mr-approval-card.status-rejected {
+          --approval-bg-color: hsl(5, 60%, 92%);
+          --approval-accent-color: hsl(357, 100%, 39%);
+        }
+        mr-approval-card chops-button.edit-survey {
+          border: var(--chops-normal-border);
+          margin: 0;
+        }
+        mr-approval-card h3 {
+          margin: 0;
+          padding: 0;
+          display: inline;
+          font-weight: inherit;
+          font-size: inherit;
+          line-height: inherit;
+        }
+        mr-approval-card mr-description {
+          display: block;
+          margin-bottom: 0.5em;
+        }
+        .approver-notice {
+          padding: 0.25em 0;
+          width: 100%;
+          display: flex;
+          flex-direction: row;
+          align-items: baseline;
+          justify-content: space-between;
+          border-bottom: 1px dotted hsl(0, 0%, 83%);
+        }
+        .card-content {
+          box-sizing: border-box;
+          padding: 0.5em 16px;
+          padding-bottom: 1em;
+        }
+        .expand-icon {
+          display: block;
+          margin-right: 8px;
+          color: hsl(0, 0%, 45%);
+        }
+        mr-approval-card .header {
+          margin: 0;
+          width: 100%;
+          border: 0;
+          font-size: var(--chops-large-font-size);
+          font-weight: normal;
+          box-sizing: border-box;
+          display: flex;
+          align-items: center;
+          flex-direction: row;
+          padding: 0.5em 8px;
+          background-color: var(--approval-bg-color);
+          cursor: pointer;
+        }
+        mr-approval-card .status {
+          font-size: var(--chops-main-font-size);
+          color: var(--approval-accent-color);
+          display: inline-flex;
+          align-items: center;
+          margin-left: 32px;
+        }
+        mr-approval-card .survey {
+          padding: 0.5em 0;
+          max-height: 500px;
+          overflow-y: auto;
+          max-width: 100%;
+          box-sizing: border-box;
+        }
+        mr-approval-card [role="heading"] {
+          display: flex;
+          flex-direction: row;
+          justify-content: space-between;
+          align-items: flex-end;
+        }
+        mr-approval-card .edit-header {
+          margin-top: 40px;
+        }
+      </style>
+      <button
+        class="header"
+        @click=${this.toggleCard}
+        aria-expanded=${(this.opened || false).toString()}
+      >
+        <i class="material-icons expand-icon">
+          ${this.opened ? 'expand_less' : 'expand_more'}
+        </i>
+        <h3>${this.fieldName}</h3>
+        <span class="status">
+          <i class="material-icons status-icon" role="presentation">
+            ${CLASS_ICON_MAP[this._statusClass]}
+          </i>
+          ${this._status}
+        </span>
+      </button>
+      <chops-collapse class="card-content" ?opened=${this.opened}>
+        <div class="approver-notice">
+          ${this._isApprover ? html`
+            You are an approver for this bit.
+          `: ''}
+          ${this.user && this.user.isSiteAdmin ? html`
+            Your site admin privileges give you full access to edit this approval.
+          `: ''}
+        </div>
+        <mr-metadata
+          aria-label="${this.fieldName} Approval Metadata"
+          .approvalStatus=${this._status}
+          .approvers=${this.approvers}
+          .setter=${this.setter}
+          .fieldDefs=${this.fieldDefs}
+          .builtInFieldSpec=${APPROVAL_METADATA_FIELDS}
+          isApproval
+        ></mr-metadata>
+        <h4
+          class="medium-heading"
+          role="heading"
+        >
+          ${this.fieldName} Survey
+          <chops-button class="edit-survey" @click=${this._openSurveyEditor}>
+            Edit responses
+          </chops-button>
+        </h4>
+        <mr-description
+          class="survey"
+          .descriptionList=${this._allSurveys}
+        ></mr-description>
+        <mr-comment-list
+          headingLevel=4
+          .comments=${this.comments}
+        ></mr-comment-list>
+        ${this.issuePermissions.includes('addissuecomment') ? html`
+          <h4 id="edit${this.fieldName}" class="medium-heading edit-header">
+            Editing approval: ${this.phaseName} &gt; ${this.fieldName}
+          </h4>
+          <mr-edit-metadata
+            .formName="${this.phaseName} > ${this.fieldName}"
+            .approvers=${this.approvers}
+            .fieldDefs=${this.fieldDefs}
+            .statuses=${this._availableStatuses}
+            .status=${this._status}
+            .error=${this.updateError && (this.updateError.description || this.updateError.message)}
+            ?saving=${this.updatingApproval}
+            ?hasApproverPrivileges=${this._hasApproverPrivileges}
+            isApproval
+            @save=${this.save}
+            @discard=${this.reset}
+          ></mr-edit-metadata>
+        ` : ''}
+      </chops-collapse>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      fieldName: {type: String},
+      approvers: {type: Array},
+      phaseName: {type: String},
+      setter: {type: Object},
+      fieldDefs: {type: Array},
+      focusId: {type: String},
+      user: {type: Object},
+      issue: {type: Object},
+      issueRef: {type: Object},
+      issuePermissions: {type: Array},
+      projectConfig: {type: Object},
+      comments: {type: String},
+      opened: {
+        type: Boolean,
+        reflect: true,
+      },
+      statusEnum: {type: String},
+      updatingApproval: {type: Boolean},
+      updateError: {type: Object},
+      _allSurveys: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.opened = false;
+    this.comments = [];
+    this.fieldDefs = [];
+    this.issuePermissions = [];
+    this._allSurveys = [];
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    const fieldDefsByApproval = projectV0.fieldDefsByApprovalName(state);
+    if (fieldDefsByApproval && this.fieldName &&
+        fieldDefsByApproval.has(this.fieldName)) {
+      this.fieldDefs = fieldDefsByApproval.get(this.fieldName);
+    }
+    const commentsByApproval = issueV0.commentsByApprovalName(state);
+    if (commentsByApproval && this.fieldName &&
+        commentsByApproval.has(this.fieldName)) {
+      const comments = commentsByApproval.get(this.fieldName);
+      this.comments = comments.slice(1);
+      this._allSurveys = commentListToDescriptionList(comments);
+    }
+    this.focusId = ui.focusId(state);
+    this.user = userV0.currentUser(state);
+    this.issue = issueV0.viewedIssue(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.issuePermissions = issueV0.permissions(state);
+    this.projectConfig = projectV0.viewedConfig(state);
+    this.updatingApproval = issueV0.requests(state).updateApproval.requesting;
+    this.updateError = issueV0.requests(state).updateApproval.error;
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if ((changedProperties.has('comments') ||
+        changedProperties.has('focusId')) && this.comments) {
+      const focused = this.comments.find(
+          (comment) => `c${comment.sequenceNum}` === this.focusId);
+      if (focused) {
+        // Make sure to open the card when a comment is focused.
+        this.opened = true;
+      }
+    }
+    if (changedProperties.has('statusEnum')) {
+      this.setAttribute('class', this._statusClass);
+    }
+    if (changedProperties.has('user') || changedProperties.has('approvers')) {
+      if (this._isApprover) {
+        // Open the card by default if the user is an approver.
+        this.opened = true;
+      }
+    }
+    super.update(changedProperties);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('issue')) {
+      this.reset();
+    }
+  }
+
+  /**
+   * Resets the approval edit form.
+   */
+  reset() {
+    const form = this.querySelector('mr-edit-metadata');
+    if (!form) return;
+    form.reset();
+  }
+
+  /**
+   * Saves the user's changes in the approval update form.
+   */
+  async save() {
+    const form = this.querySelector('mr-edit-metadata');
+    const delta = form.delta;
+
+    if (delta.status) {
+      delta.status = TEXT_TO_STATUS_ENUM[delta.status];
+    }
+
+    // TODO(ehmaldonado): Show snackbar on change, and prevent starring issues
+    // to resetting the form.
+
+    const message = {
+      issueRef: this.issueRef,
+      fieldRef: {
+        type: fieldTypes.APPROVAL_TYPE,
+        fieldName: this.fieldName,
+      },
+      approvalDelta: delta,
+      commentContent: form.getCommentContent(),
+      sendEmail: form.sendEmail,
+    };
+
+    // Add files to message.
+    const uploads = await form.getAttachments();
+
+    if (uploads && uploads.length) {
+      message.uploads = uploads;
+    }
+
+    if (message.commentContent || message.approvalDelta || message.uploads) {
+      store.dispatch(issueV0.updateApproval(message));
+    }
+  }
+
+  /**
+   * Opens and closes the approval card.
+   */
+  toggleCard() {
+    this.opened = !this.opened;
+  }
+
+  /**
+   * @return {string} The CSS class used to style the approval card,
+   *   given its status.
+   * @private
+   */
+  get _statusClass() {
+    return STATUS_CLASS_MAP[this._status];
+  }
+
+  /**
+   * @return {string} The human readable value of an approval status.
+   * @private
+   */
+  get _status() {
+    return STATUS_ENUM_TO_TEXT[this.statusEnum || ''];
+  }
+
+  /**
+   * @return {boolean} Whether the user is an approver or not.
+   * @private
+   */
+  get _isApprover() {
+    // Assumption: Since a user who is an approver should always be a project
+    // member, displayNames should be visible to them if they are an approver.
+    if (!this.approvers || !this.user || !this.user.displayName) return false;
+    const userGroups = this.user.groups || [];
+    return !!this.approvers.find((a) => {
+      return a.displayName === this.user.displayName || userGroups.find(
+          (group) => group.displayName === a.displayName,
+      );
+    });
+  }
+
+  /**
+   * @return {boolean} Whether the user can approver the approval or not.
+   *   Not the same as _isApprover because site admins can approve approvals
+   *   even if they are not approvers.
+   * @private
+   */
+  get _hasApproverPrivileges() {
+    return (this.user && this.user.isSiteAdmin) || this._isApprover;
+  }
+
+  /**
+   * @return {Array<StatusDef>}
+   * @private
+   */
+  get _availableStatuses() {
+    return APPROVAL_STATUSES.filter((s) => {
+      if (s.status === this._status) {
+        // The current status should always appear as an option.
+        return true;
+      }
+
+      if (!this._hasApproverPrivileges &&
+          APPROVER_RESTRICTED_STATUSES.has(s.status)) {
+        // If you are not an approver and and this status is restricted,
+        // you can't change to this status.
+        return false;
+      }
+
+      // No one can set statuses to NotSet, not even approvers.
+      return s.status !== 'NotSet';
+    });
+  }
+
+  /**
+   * Launches the description editing dialog for the survey.
+   * @fires CustomEvent#open-dialog
+   * @private
+   */
+  _openSurveyEditor() {
+    this.dispatchEvent(new CustomEvent('open-dialog', {
+      bubbles: true,
+      composed: true,
+      detail: {
+        dialogId: 'edit-description',
+        fieldName: this.fieldName,
+      },
+    }));
+  }
+}
+
+customElements.define('mr-approval-card', MrApprovalCard);
diff --git a/static_src/elements/issue-detail/mr-approval-card/mr-approval-card.test.js b/static_src/elements/issue-detail/mr-approval-card/mr-approval-card.test.js
new file mode 100644
index 0000000..0424c21
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-approval-card/mr-approval-card.test.js
@@ -0,0 +1,245 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrApprovalCard} from './mr-approval-card.js';
+
+let element;
+
+describe('mr-approval-card', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-approval-card');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrApprovalCard);
+  });
+
+  it('_isApprover true when user is an approver', () => {
+    // User not in approver list.
+    element.approvers = [
+      {displayName: 'tester@user.com'},
+      {displayName: 'test@notuser.com'},
+      {displayName: 'hello@world.com'},
+    ];
+    element.user = {displayName: 'test@user.com', groups: []};
+    assert.isFalse(element._isApprover);
+
+    // Use is in approver list.
+    element.approvers = [
+      {displayName: 'tester@user.com'},
+      {displayName: 'test@notuser.com'},
+      {displayName: 'hello@world.com'},
+      {displayName: 'test@user.com'},
+    ];
+    assert.isTrue(element._isApprover);
+
+    // User's group is not in the list.
+    element.approvers = [
+      {displayName: 'tester@user.com'},
+      {displayName: 'nongroup@group.com'},
+      {displayName: 'group@nongroup.com'},
+      {displayName: 'ignore@test.com'},
+    ];
+    element.user = {
+      displayName: 'test@user.com',
+      groups: [
+        {displayName: 'group@group.com'},
+        {displayName: 'test@group.com'},
+        {displayName: 'group@user.com'},
+      ],
+    };
+    assert.isFalse(element._isApprover);
+
+    // User's group is in the list.
+    element.approvers = [
+      {displayName: 'tester@user.com'},
+      {displayName: 'group@group.com'},
+      {displayName: 'test@notuser.com'},
+    ];
+    element.user = {
+      displayName: 'test@user.com',
+      groups: [
+        {displayName: 'group@group.com'},
+      ],
+    };
+    assert.isTrue(element._isApprover);
+  });
+
+  it('approvals change color based on status', async () => {
+    // Initialize dependent CSS property from a stylesheet not included in
+    // our testing environment.
+    element.style.setProperty('--chops-purple-50', '#f3e5f5');
+
+    element.statusEnum = 'NEEDS_REVIEW';
+    await element.updateComplete;
+
+    const header = element.querySelector('button.header');
+
+    // Purple. Note that Chrome uses RGB for computed styles regardless of
+    // underlying CSS.
+    assert.equal(
+      window.getComputedStyle(header).getPropertyValue('background-color'),
+      'rgb(243, 229, 245)');
+
+    element.statusEnum = 'APPROVED';
+    await element.updateComplete;
+
+    // Green.
+    assert.equal(
+      window.getComputedStyle(header).getPropertyValue('background-color'),
+      'rgb(235, 244, 215)');
+  });
+
+  it('site admins have approver privileges', async () => {
+    await element.updateComplete;
+
+    const notice = element.querySelector('.approver-notice');
+    assert.equal(notice.textContent.trim(), '');
+
+    element.user = {isSiteAdmin: true};
+    await element.updateComplete;
+
+    assert.isTrue(element._hasApproverPrivileges);
+
+    assert.equal(notice.textContent.trim(),
+        'Your site admin privileges give you full access to edit this approval.',
+    );
+  });
+
+  it('site admins see all approval statuses except NotSet', () => {
+    element.user = {isSiteAdmin: true};
+
+    assert.isFalse(element._isApprover);
+
+    element.statusEnum = 'NEEDS_REVIEW';
+
+    assert.equal(element._availableStatuses.length, 7);
+    assert.equal(element._availableStatuses[0].status, 'NeedsReview');
+    assert.equal(element._availableStatuses[1].status, 'NA');
+    assert.equal(element._availableStatuses[2].status, 'ReviewRequested');
+    assert.equal(element._availableStatuses[3].status, 'ReviewStarted');
+    assert.equal(element._availableStatuses[4].status, 'NeedInfo');
+    assert.equal(element._availableStatuses[5].status, 'Approved');
+    assert.equal(element._availableStatuses[6].status, 'NotApproved');
+  });
+
+  it('approvers see all approval statuses except NotSet', () => {
+    element.user = {isSiteAdmin: false, displayName: 'test@email.com'};
+    element.approvers = [{displayName: 'test@email.com'}];
+
+    assert.isTrue(element._isApprover);
+
+    element.statusEnum = 'NEEDS_REVIEW';
+
+    assert.equal(element._availableStatuses.length, 7);
+    assert.equal(element._availableStatuses[0].status, 'NeedsReview');
+    assert.equal(element._availableStatuses[1].status, 'NA');
+    assert.equal(element._availableStatuses[2].status, 'ReviewRequested');
+    assert.equal(element._availableStatuses[3].status, 'ReviewStarted');
+    assert.equal(element._availableStatuses[4].status, 'NeedInfo');
+    assert.equal(element._availableStatuses[5].status, 'Approved');
+    assert.equal(element._availableStatuses[6].status, 'NotApproved');
+  });
+
+  it('non-approvers see non-restricted approval statuses', () => {
+    element.user = {isSiteAdmin: false, displayName: 'test@email.com'};
+    element.approvers = [{displayName: 'test@otheremail.com'}];
+
+    assert.isFalse(element._isApprover);
+
+    element.statusEnum = 'NEEDS_REVIEW';
+
+    assert.equal(element._availableStatuses.length, 4);
+    assert.equal(element._availableStatuses[0].status, 'NeedsReview');
+    assert.equal(element._availableStatuses[1].status, 'ReviewRequested');
+    assert.equal(element._availableStatuses[2].status, 'ReviewStarted');
+    assert.equal(element._availableStatuses[3].status, 'NeedInfo');
+  });
+
+  it('non-approvers see restricted approval status when set', () => {
+    element.user = {isSiteAdmin: false, displayName: 'test@email.com'};
+    element.approvers = [{displayName: 'test@otheremail.com'}];
+
+    assert.isFalse(element._isApprover);
+
+    element.statusEnum = 'APPROVED';
+
+    assert.equal(element._availableStatuses.length, 5);
+    assert.equal(element._availableStatuses[0].status, 'NeedsReview');
+    assert.equal(element._availableStatuses[1].status, 'ReviewRequested');
+    assert.equal(element._availableStatuses[2].status, 'ReviewStarted');
+    assert.equal(element._availableStatuses[3].status, 'NeedInfo');
+    assert.equal(element._availableStatuses[4].status, 'Approved');
+  });
+
+  it('expands to show focused comment', async () => {
+    element.focusId = 'c4';
+    element.fieldName = 'field';
+    element.comments = [
+      {
+        sequenceNum: 1,
+        approvalRef: {fieldName: 'other-field'},
+      },
+      {
+        sequenceNum: 2,
+        approvalRef: {fieldName: 'field'},
+      },
+      {
+        sequenceNum: 3,
+      },
+      {
+        sequenceNum: 4,
+        approvalRef: {fieldName: 'field'},
+      },
+    ];
+
+    await element.updateComplete;
+
+    assert.isTrue(element.opened);
+  });
+
+  it('does not expand to show focused comment on other elements', async () => {
+    element.focusId = 'c3';
+    element.comments = [
+      {
+        sequenceNum: 1,
+        approvalRef: {fieldName: 'other-field'},
+      },
+      {
+        sequenceNum: 2,
+        approvalRef: {fieldName: 'field'},
+      },
+      {
+        sequenceNum: 4,
+        approvalRef: {fieldName: 'field'},
+      },
+    ];
+
+    await element.updateComplete;
+
+    assert.isFalse(element.opened);
+  });
+
+  it('mr-edit-metadata is displayed if user has addissuecomment', async () => {
+    element.issuePermissions = ['addissuecomment'];
+
+    await element.updateComplete;
+
+    assert.isNotNull(element.querySelector('mr-edit-metadata'));
+  });
+
+  it('mr-edit-metadata is hidden if user has no addissuecomment', async () => {
+    element.issuePermissions = [];
+
+    await element.updateComplete;
+
+    assert.isNull(element.querySelector('mr-edit-metadata'));
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-comment-list/mr-comment-list.js b/static_src/elements/issue-detail/mr-comment-list/mr-comment-list.js
new file mode 100644
index 0000000..aad9a8a
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-comment-list/mr-comment-list.js
@@ -0,0 +1,163 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {cache} from 'lit-html/directives/cache.js';
+import {LitElement, html, css} from 'lit-element';
+
+import '../../chops/chops-button/chops-button.js';
+import './mr-comment.js';
+import {connectStore} from 'reducers/base.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as ui from 'reducers/ui.js';
+import {userIsMember} from 'shared/helpers.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+/**
+ * `<mr-comment-list>`
+ *
+ * Display a list of Monorail comments.
+ *
+ */
+export class MrCommentList extends connectStore(LitElement) {
+  /** @override */
+  constructor() {
+    super();
+
+    this.commentsShownCount = 2;
+    this.comments = [];
+    this.headingLevel = 4;
+
+    this.focusId = null;
+
+    this.usersProjects = new Map();
+
+    this._hideComments = true;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      commentsShownCount: {type: Number},
+      comments: {type: Array},
+      headingLevel: {type: Number},
+
+      focusId: {type: String},
+
+      usersProjects: {type: Object},
+
+      _hideComments: {type: Boolean},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.focusId = ui.focusId(state);
+    this.usersProjects = userV0.projectsPerUser(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    super.updated(changedProperties);
+
+    if (!this._hideComments) return;
+
+    // If any hidden comment is focused, show all hidden comments.
+    const hiddenCount =
+      _hiddenCount(this.comments.length, this.commentsShownCount);
+    const hiddenComments = this.comments.slice(0, hiddenCount);
+    for (const comment of hiddenComments) {
+      if ('c' + comment.sequenceNum === this.focusId) {
+        this._hideComments = false;
+        break;
+      }
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [SHARED_STYLES, css`
+      button.toggle {
+        background: none;
+        color: var(--chops-link-color);
+        border: 0;
+        border-bottom: var(--chops-normal-border);
+        border-top: var(--chops-normal-border);
+        width: 100%;
+        padding: 0.5em 8px;
+        text-align: left;
+        font-size: var(--chops-main-font-size);
+      }
+      button.toggle:hover {
+        cursor: pointer;
+        text-decoration: underline;
+      }
+      button.toggle[hidden] {
+        display: none;
+      }
+      .edit-slot {
+        margin-top: 3em;
+      }
+    `];
+  }
+
+  /** @override */
+  render() {
+    const hiddenCount =
+      _hiddenCount(this.comments.length, this.commentsShownCount);
+    return html`
+      <button @click=${this._toggleHide}
+          class="toggle"
+          ?hidden=${hiddenCount <= 0}>
+        ${this._hideComments ? 'Show' : 'Hide'}
+        ${hiddenCount}
+        older
+        ${hiddenCount == 1 ? 'comment' : 'comments'}
+      </button>
+      ${cache(this._hideComments ? '' :
+    html`${this.comments.slice(0, hiddenCount).map(
+        this.renderComment.bind(this))}`)}
+      ${this.comments.slice(hiddenCount).map(this.renderComment.bind(this))}
+    `;
+  }
+
+  /**
+   * Helper to render a single comment.
+   * @param {Comment} comment
+   * @return {TemplateResult}
+   */
+  renderComment(comment) {
+    const commenterIsMember = userIsMember(
+        comment.commenter, comment.projectName, this.usersProjects);
+    return html`
+      <mr-comment
+          .comment=${comment}
+          headingLevel=${this.headingLevel}
+          ?highlighted=${'c' + comment.sequenceNum === this.focusId}
+          ?commenterIsMember=${commenterIsMember}
+      ></mr-comment>`;
+  }
+
+  /**
+   * Hides or unhides comments that are hidden by default. For example,
+   * if an issue has 200 comments, the first 100 comments are shown initially,
+   * then the last 100 can be toggled to be shown.
+   * @private
+   */
+  _toggleHide() {
+    this._hideComments = !this._hideComments;
+  }
+}
+
+/**
+ * Computes how many comments the user is able to expand.
+ * @param {number} commentCount Total comments.
+ * @param {number} commentsShownCount The number of comments shown.
+ * @return {number} The number of hidden comments.
+ * @private
+ */
+function _hiddenCount(commentCount, commentsShownCount) {
+  return Math.max(commentCount - commentsShownCount, 0);
+}
+
+customElements.define('mr-comment-list', MrCommentList);
diff --git a/static_src/elements/issue-detail/mr-comment-list/mr-comment-list.test.js b/static_src/elements/issue-detail/mr-comment-list/mr-comment-list.test.js
new file mode 100644
index 0000000..548b7a7
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-comment-list/mr-comment-list.test.js
@@ -0,0 +1,108 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrCommentList} from './mr-comment-list.js';
+
+
+let element;
+
+describe('mr-comment-list', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-comment-list');
+    document.body.appendChild(element);
+    element.comments = [
+      {
+        canFlag: true,
+        localId: 898395,
+        canDelete: true,
+        projectName: 'chromium',
+        commenter: {
+          displayName: 'user@example.com',
+          userId: '12345',
+        },
+        content: 'foo',
+        sequenceNum: 1,
+        timestamp: 1549319989,
+      },
+      {
+        canFlag: true,
+        localId: 898395,
+        canDelete: true,
+        projectName: 'chromium',
+        commenter: {
+          displayName: 'user@example.com',
+          userId: '12345',
+        },
+        content: 'foo',
+        sequenceNum: 2,
+        timestamp: 1549320089,
+      },
+      {
+        canFlag: true,
+        localId: 898395,
+        canDelete: true,
+        projectName: 'chromium',
+        commenter: {
+          displayName: 'user@example.com',
+          userId: '12345',
+        },
+        content: 'foo',
+        sequenceNum: 3,
+        timestamp: 1549320189,
+      },
+    ];
+
+    // Stub RAF to execute immediately.
+    sinon.stub(window, 'requestAnimationFrame').callsFake((func) => func());
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    window.requestAnimationFrame.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrCommentList);
+  });
+
+  it('scrolls to comment', async () => {
+    await element.updateComplete;
+
+    const commentElements = element.shadowRoot.querySelectorAll('mr-comment');
+    const commentElement = commentElements[commentElements.length - 1];
+    sinon.stub(commentElement, 'scrollIntoView');
+
+    element.focusId = 'c3';
+
+    await element.updateComplete;
+
+    assert.isTrue(element._hideComments);
+    assert.isTrue(commentElement.scrollIntoView.calledOnce);
+
+    commentElement.scrollIntoView.restore();
+  });
+
+  it('scrolls to hidden comment', async () => {
+    await element.updateComplete;
+
+    element.focusId = 'c1';
+
+    await element.updateComplete;
+
+    assert.isFalse(element._hideComments);
+    // TODO: Check that the comment has been scrolled into view.
+  });
+
+  it('doesnt scroll to unknown comment', async () => {
+    await element.updateComplete;
+
+    element.focusId = 'c100';
+
+    await element.updateComplete;
+
+    assert.isTrue(element._hideComments);
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-comment-list/mr-comment.js b/static_src/elements/issue-detail/mr-comment-list/mr-comment.js
new file mode 100644
index 0000000..e56bef3
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-comment-list/mr-comment.js
@@ -0,0 +1,416 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {store} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+
+import 'elements/chops/chops-button/chops-button.js';
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+import 'elements/framework/mr-comment-content/mr-comment-content.js';
+import 'elements/framework/mr-comment-content/mr-attachment.js';
+import 'elements/framework/mr-dropdown/mr-dropdown.js';
+import 'elements/framework/links/mr-issue-link/mr-issue-link.js';
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import {issueStringToRef} from 'shared/convertersV0.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import 'shared/typedef.js';
+
+const ISSUE_REF_FIELD_NAMES = [
+  'Blocking',
+  'Blockedon',
+  'Mergedinto',
+];
+
+/**
+ * `<mr-comment>`
+ *
+ * A component for an individual comment.
+ *
+ */
+export class MrComment extends LitElement {
+  /** @override */
+  constructor() {
+    super();
+
+    this._isExpandedIfDeleted = false;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      comment: {type: Object},
+      headingLevel: {type: String},
+      highlighted: {
+        type: Boolean,
+        reflect: true,
+      },
+      commenterIsMember: {type: Boolean},
+      _isExpandedIfDeleted: {type: Boolean},
+      _showOriginalContent: {type: Boolean},
+    };
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    super.updated(changedProperties);
+
+    if (changedProperties.has('highlighted') && this.highlighted) {
+      window.requestAnimationFrame(() => {
+        this.scrollIntoView();
+        // TODO(ehmaldonado): Figure out a way to get the height from the issue
+        // header, and scroll by that amount.
+        window.scrollBy(0, -150);
+      });
+    }
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: block;
+          margin: 1.5em 0 0 0;
+        }
+        :host([highlighted]) {
+          border: 1px solid var(--chops-primary-accent-color);
+          box-shadow: 0 0 4px 4px var(--chops-active-choice-bg);
+        }
+        :host([hidden]) {
+          display: none;
+        }
+        .comment-header {
+          background: var(--chops-card-heading-bg);
+          padding: 3px 1px 1px 8px;
+          width: 100%;
+          display: flex;
+          flex-direction: row;
+          justify-content: space-between;
+          align-items: center;
+          box-sizing: border-box;
+        }
+        .comment-header a {
+          display: inline-flex;
+        }
+        .role-label {
+          background-color: var(--chops-gray-600);
+          border-radius: 3px;
+          color: var(--chops-white);
+          display: inline-block;
+          padding: 2px 4px;
+          font-size: 75%;
+          font-weight: bold;
+          line-height: 14px;
+          vertical-align: text-bottom;
+          margin-left: 16px;
+        }
+        .comment-options {
+          float: right;
+          text-align: right;
+          text-decoration: none;
+        }
+        .comment-body {
+          margin: 4px;
+          box-sizing: border-box;
+        }
+        .deleted-comment-notice {
+          margin-left: 4px;
+        }
+        .issue-diff {
+          background: var(--chops-card-details-bg);
+          display: inline-block;
+          padding: 4px 8px;
+          width: 100%;
+          box-sizing: border-box;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      ${this._renderHeading()}
+      ${_shouldShowComment(this._isExpandedIfDeleted, this.comment) ? html`
+        ${this._renderDiff()}
+        ${this._renderBody()}
+      ` : ''}
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderHeading() {
+    return html`
+      <div
+        role="heading"
+        aria-level=${this.headingLevel}
+        class="comment-header">
+        <div>
+          <a
+            href="?id=${this.comment.localId}#c${this.comment.sequenceNum}"
+            class="comment-link"
+          >Comment ${this.comment.sequenceNum}</a>
+
+          ${this._renderByline()}
+        </div>
+        ${_shouldOfferCommentOptions(this.comment) ? html`
+          <div class="comment-options">
+            <mr-dropdown
+              .items=${this._commentOptions}
+              label="Comment options"
+              icon="more_vert"
+            ></mr-dropdown>
+          </div>
+        ` : ''}
+      </div>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderByline() {
+    if (_shouldShowComment(this._isExpandedIfDeleted, this.comment)) {
+      return html`
+        by
+        <mr-user-link .userRef=${this.comment.commenter}></mr-user-link>
+        on
+        <chops-timestamp
+          .timestamp=${this.comment.timestamp}
+        ></chops-timestamp>
+        ${this.commenterIsMember && !this.comment.isDeleted ? html`
+          <span class="role-label">Project Member</span>` : ''}
+      `;
+    } else {
+      return html`<span class="deleted-comment-notice">Deleted</span>`;
+    }
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderDiff() {
+    if (!(this.comment.descriptionNum || this.comment.amendments)) return '';
+
+    return html`
+      <div class="issue-diff">
+        ${(this.comment.amendments || []).map((delta) => html`
+          <strong>${delta.fieldName}:</strong>
+          ${_issuesForAmendment(delta, this.comment.projectName).map((issueForAmendment) => html`
+            <mr-issue-link
+              projectName=${this.comment.projectName}
+              .issue=${issueForAmendment.issue}
+              text=${issueForAmendment.text}
+            ></mr-issue-link>
+          `)}
+          ${!_amendmentHasIssueRefs(delta.fieldName) ? delta.newOrDeltaValue : ''}
+          ${delta.oldValue ? `(was: ${delta.oldValue})` : ''}
+          <br>
+        `)}
+        ${this.comment.descriptionNum ? 'Description was changed.' : ''}
+      </div><br>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderBody() {
+    const commentContent = this._showOriginalContent ?
+      this.comment.inboundMessage :
+      this.comment.content;
+    return html`
+      <div class="comment-body">
+        <mr-comment-content
+          ?hidden=${this.comment.descriptionNum}
+          .content=${commentContent}
+          .author=${this.comment.commenter.displayName}
+          ?isDeleted=${this.comment.isDeleted}
+        ></mr-comment-content>
+        <div ?hidden=${this.comment.descriptionNum}>
+          ${(this.comment.attachments || []).map((attachment) => html`
+            <mr-attachment
+              .attachment=${attachment}
+              projectName=${this.comment.projectName}
+              localId=${this.comment.localId}
+              sequenceNum=${this.comment.sequenceNum}
+              ?canDelete=${this.comment.canDelete}
+            ></mr-attachment>
+          `)}
+        </div>
+      </div>
+    `;
+  }
+
+  /**
+   * Displays three dot menu options available to the current user for a given
+   * comment.
+   * @return {Array<MenuItem>}
+   */
+  get _commentOptions() {
+    const options = [];
+    if (_canExpandDeletedComment(this.comment)) {
+      const text =
+        (this._isExpandedIfDeleted ? 'Hide' : 'Show') + ' comment content';
+      options.push({
+        text: text,
+        handler: this._toggleHideDeletedComment.bind(this),
+      });
+      options.push({separator: true});
+    }
+    if (this.comment.canDelete) {
+      const text =
+        (this.comment.isDeleted ? 'Undelete' : 'Delete') + ' comment';
+      options.push({
+        text: text,
+        handler: _deleteComment.bind(null, this.comment),
+      });
+    }
+    if (this.comment.canFlag) {
+      const text = (this.comment.isSpam ? 'Unflag' : 'Flag') + ' comment';
+      options.push({
+        text: text,
+        handler: _flagComment.bind(null, this.comment),
+      });
+    }
+    if (this.comment.inboundMessage) {
+      const text =
+        (this._showOriginalContent ? 'Hide' : 'Show') + ' original email';
+      options.push({
+        text: text,
+        handler: this._toggleShowOriginalContent.bind(this),
+      });
+    }
+    return options;
+  }
+
+  /**
+   * Toggles whether the email of the user who deleted the comment should be
+   * shown.
+   */
+  _toggleShowOriginalContent() {
+    this._showOriginalContent = !this._showOriginalContent;
+  }
+
+  /**
+   * Change if deleted content for a comment is shown or not.
+   */
+  _toggleHideDeletedComment() {
+    this._isExpandedIfDeleted = !this._isExpandedIfDeleted;
+  }
+}
+
+/**
+ * Says whether a comment should be shown or not.
+ * @param {boolean} isExpandedIfDeleted If the user has chosen to see the
+ *   deleted comment.
+ * @param {IssueComment} comment
+ * @return {boolean} If the comment should be shown.
+ */
+function _shouldShowComment(isExpandedIfDeleted, comment) {
+  return !comment.isDeleted || isExpandedIfDeleted;
+}
+
+/**
+ * Whether the user can view additional comment options like flagging or
+ * deleting.
+ * @param {IssueComment} comment
+ * @return {boolean}
+ */
+function _shouldOfferCommentOptions(comment) {
+  return comment.canDelete || comment.canFlag;
+}
+
+/**
+ * Whether a user has permission to view a given deleted comment.
+ * @param {IssueComment} comment
+ * @return {boolean}
+ */
+function _canExpandDeletedComment(comment) {
+  return ((comment.isSpam && comment.canFlag) ||
+          (comment.isDeleted && comment.canDelete));
+}
+
+/**
+ * Deletes a given comment or undeletes it if it's already deleted.
+ * @param {IssueComment} comment The comment to delete.
+ */
+async function _deleteComment(comment) {
+  const issueRef = {
+    projectName: comment.projectName,
+    localId: comment.localId,
+  };
+  await prpcClient.call('monorail.Issues', 'DeleteIssueComment', {
+    issueRef,
+    sequenceNum: comment.sequenceNum,
+    delete: comment.isDeleted === undefined,
+  });
+  store.dispatch(issueV0.fetchComments(issueRef));
+}
+
+/**
+ * Sends a request to flag a comment as spam. Flags or unflags based on
+ * the comments existing isSpam state.
+ * @param {IssueComment} comment The comment to flag.
+ */
+async function _flagComment(comment) {
+  const issueRef = {
+    projectName: comment.projectName,
+    localId: comment.localId,
+  };
+  await prpcClient.call('monorail.Issues', 'FlagComment', {
+    issueRef,
+    sequenceNum: comment.sequenceNum,
+    flag: comment.isSpam === undefined,
+  });
+  store.dispatch(issueV0.fetchComments(issueRef));
+}
+
+/**
+ * Finds if a given change in a comment contains issues (ie: for Blocking or
+ * BlockedOn edits), then formats those issues into a list to be rendered by the
+ * frontend.
+ * @param {Amendment} delta
+ * @param {string} projectName The project name the user is currently viewing.
+ * @return {Array<{issue: Issue, text: string}>}
+ */
+function _issuesForAmendment(delta, projectName) {
+  if (!_amendmentHasIssueRefs(delta.fieldName) ||
+      !delta.newOrDeltaValue) {
+    return [];
+  }
+  // TODO(ehmaldonado): Request the issue to check for permissions and display
+  // the issue summary.
+  return delta.newOrDeltaValue.split(' ').map((deltaValue) => {
+    let refString = deltaValue;
+
+    // When an issue is removed, its ID is prepended with a minus sign.
+    if (refString.startsWith('-')) {
+      refString = refString.substr(1);
+    }
+    const issueRef = issueStringToRef(refString, projectName);
+    return {
+      issue: {
+        ...issueRef,
+      },
+      text: deltaValue,
+    };
+  });
+}
+
+/**
+ * Check if a field is one of the field types that accepts issues as input.
+ * @param {string} fieldName
+ * @return {boolean} If the field contains issues.
+ */
+function _amendmentHasIssueRefs(fieldName) {
+  return ISSUE_REF_FIELD_NAMES.includes(fieldName);
+}
+
+customElements.define('mr-comment', MrComment);
diff --git a/static_src/elements/issue-detail/mr-comment-list/mr-comment.test.js b/static_src/elements/issue-detail/mr-comment-list/mr-comment.test.js
new file mode 100644
index 0000000..6933825
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-comment-list/mr-comment.test.js
@@ -0,0 +1,257 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrComment} from './mr-comment.js';
+
+
+let element;
+
+/**
+ * Testing helper to find if an Array of options has an option with some
+ * text.
+ * @param {Array<MenuItem>} options Dropdown options to look through.
+ * @param {string} needle The text to search for.
+ * @return {boolean} Whether the option exists or not.
+ */
+const hasOptionWithText = (options, needle) => {
+  return options.some(({text}) => text === needle);
+};
+
+describe('mr-comment', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-comment');
+    element.comment = {
+      canFlag: true,
+      localId: 898395,
+      canDelete: true,
+      projectName: 'chromium',
+      commenter: {
+        displayName: 'user@example.com',
+        userId: '12345',
+      },
+      content: 'foo',
+      sequenceNum: 3,
+      timestamp: 1549319989,
+    };
+    document.body.appendChild(element);
+
+    // Stub RAF to execute immediately.
+    sinon.stub(window, 'requestAnimationFrame').callsFake((func) => func());
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    window.requestAnimationFrame.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrComment);
+  });
+
+  it('scrolls to comment', async () => {
+    sinon.stub(element, 'scrollIntoView');
+
+    element.highlighted = true;
+    await element.updateComplete;
+
+    assert.isTrue(element.scrollIntoView.calledOnce);
+
+    element.scrollIntoView.restore();
+  });
+
+  it('comment header renders self link to comment', async () => {
+    element.comment = {
+      localId: 1,
+      projectName: 'test',
+      sequenceNum: 2,
+      commenter: {
+        displayName: 'user@example.com',
+        userId: '12345',
+      },
+    };
+
+    await element.updateComplete;
+
+    const link = element.shadowRoot.querySelector('.comment-link');
+
+    assert.equal(link.textContent, 'Comment 2');
+    assert.include(link.href, '?id=1#c2');
+  });
+
+  it('renders issue links for Blockedon issue amendments', async () => {
+    element.comment = {
+      projectName: 'test',
+      amendments: [
+        {
+          fieldName: 'Blockedon',
+          newOrDeltaValue: '-2 3',
+        },
+      ],
+      commenter: {
+        displayName: 'user@example.com',
+        userId: '12345',
+      },
+    };
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('mr-issue-link');
+
+    assert.equal(links.length, 2);
+
+    assert.equal(links[0].text, '-2');
+    assert.deepEqual(links[0].href, '/p/test/issues/detail?id=2');
+
+    assert.equal(links[1].text, '3');
+    assert.deepEqual(links[1].href, '/p/test/issues/detail?id=3');
+  });
+
+  it('renders issue links for Blocking issue amendments', async () => {
+    element.comment = {
+      projectName: 'test',
+      amendments: [
+        {
+          fieldName: 'Blocking',
+          newOrDeltaValue: '-2 3',
+        },
+      ],
+      commenter: {
+        displayName: 'user@example.com',
+        userId: '12345',
+      },
+    };
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('mr-issue-link');
+
+    assert.equal(links.length, 2);
+
+    assert.equal(links[0].text, '-2');
+    assert.deepEqual(links[0].href, '/p/test/issues/detail?id=2');
+
+    assert.equal(links[1].text, '3');
+    assert.deepEqual(links[1].href, '/p/test/issues/detail?id=3');
+  });
+
+  it('renders issue links for Mergedinto issue amendments', async () => {
+    element.comment = {
+      projectName: 'test',
+      amendments: [
+        {
+          fieldName: 'Mergedinto',
+          newOrDeltaValue: '-2 3',
+        },
+      ],
+      commenter: {
+        displayName: 'user@example.com',
+        userId: '12345',
+      },
+    };
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('mr-issue-link');
+
+    assert.equal(links.length, 2);
+
+    assert.equal(links[0].text, '-2');
+    assert.deepEqual(links[0].href, '/p/test/issues/detail?id=2');
+
+    assert.equal(links[1].text, '3');
+    assert.deepEqual(links[1].href, '/p/test/issues/detail?id=3');
+  });
+
+  describe('3-dot menu options', () => {
+    it('allows showing deleted comment content', () => {
+      element._isExpandedIfDeleted = false;
+
+      // The comment is deleted.
+      element.comment = {content: 'test', isDeleted: true, canDelete: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Show comment content'));
+
+      // The comment is spam.
+      element.comment = {content: 'test', isSpam: true, canFlag: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Show comment content'));
+    });
+
+    it('allows hiding deleted comment content', () => {
+      element._isExpandedIfDeleted = true;
+
+      // The comment is deleted.
+      element.comment = {content: 'test', isDeleted: true, canDelete: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Hide comment content'));
+
+      // The comment is spam.
+      element.comment = {content: 'test', isSpam: true, canFlag: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Hide comment content'));
+    });
+
+    it('disallows showing deleted comment content', () => {
+      // The comment is deleted.
+      element.comment = {content: 'test', isDeleted: true, canDelete: false};
+      assert.isFalse(hasOptionWithText(element._commentOptions,
+          'Hide comment content'));
+
+      // The comment is spam.
+      element.comment = {content: 'test', isSpam: true, canFlag: false};
+      assert.isFalse(hasOptionWithText(element._commentOptions,
+          'Hide comment content'));
+    });
+
+    it('allows deleting comment', () => {
+      element.comment = {content: 'test', isDeleted: false, canDelete: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Delete comment'));
+    });
+
+    it('disallows deleting comment', () => {
+      element.comment = {content: 'test', isDeleted: false, canDelete: false};
+      assert.isFalse(hasOptionWithText(element._commentOptions,
+          'Delete comment'));
+    });
+
+    it('allows undeleting comment', () => {
+      element.comment = {content: 'test', isDeleted: true, canDelete: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Undelete comment'));
+    });
+
+    it('disallows undeleting comment', () => {
+      element.comment = {content: 'test', isDeleted: true, canDelete: false};
+      assert.isFalse(hasOptionWithText(element._commentOptions,
+          'Undelete comment'));
+    });
+
+    it('allows flagging comment as spam', () => {
+      element.comment = {content: 'test', isSpam: false, canFlag: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Flag comment'));
+    });
+
+    it('disallows flagging comment as spam', () => {
+      element.comment = {content: 'test', isSpam: false, canFlag: false};
+      assert.isFalse(hasOptionWithText(element._commentOptions,
+          'Flag comment'));
+    });
+
+    it('allows unflagging comment as spam', () => {
+      element.comment = {content: 'test', isSpam: true, canFlag: true};
+      assert.isTrue(hasOptionWithText(element._commentOptions,
+          'Unflag comment'));
+    });
+
+    it('disallows unflagging comment as spam', () => {
+      element.comment = {content: 'test', isSpam: true, canFlag: false};
+      assert.isFalse(hasOptionWithText(element._commentOptions,
+          'Unflag comment'));
+    });
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-flipper/mr-flipper.js b/static_src/elements/issue-detail/mr-flipper/mr-flipper.js
new file mode 100644
index 0000000..8159e01
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-flipper/mr-flipper.js
@@ -0,0 +1,151 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import qs from 'qs';
+import {connectStore} from 'reducers/base.js';
+import * as sitewide from 'reducers/sitewide.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+/**
+ * Class for displaying a single flipper.
+ * @extends {LitElement}
+ */
+export default class MrFlipper extends connectStore(LitElement) {
+  /** @override */
+  static get properties() {
+    return {
+      currentIndex: {type: Number},
+      totalCount: {type: Number},
+      prevUrl: {type: String},
+      nextUrl: {type: String},
+      listUrl: {type: String},
+      queryParams: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.currentIndex = null;
+    this.totalCount = null;
+    this.prevUrl = null;
+    this.nextUrl = null;
+    this.listUrl = null;
+
+    this.queryParams = {};
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.queryParams = sitewide.queryParams(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('queryParams')) {
+      this.fetchFlipperData(qs.stringify(this.queryParams));
+    }
+  }
+
+  // Eventually this should be replaced with pRPC.
+  fetchFlipperData(query) {
+    const options = {
+      credentials: 'include',
+      method: 'GET',
+    };
+    fetch(`detail/flipper?${query}`, options).then(
+        (response) => response.text(),
+    ).then(
+        (responseBody) => {
+          let responseData;
+          try {
+          // Strip XSSI prefix from response.
+            responseData = JSON.parse(responseBody.substr(5));
+          } catch (e) {
+            console.error(`Error parsing JSON response for flipper: ${e}`);
+            return;
+          }
+          this._populateResponseData(responseData);
+        },
+    );
+  }
+
+  _populateResponseData(data) {
+    this.totalCount = data.total_count;
+    this.currentIndex = data.cur_index;
+    this.prevUrl = data.prev_url;
+    this.nextUrl = data.next_url;
+    this.listUrl = data.list_url;
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: flex;
+          justify-content: center;
+          flex-direction: column;
+        }
+        /* Use visibility instead of display:hidden for hiding in order to
+        * avoid popping when elements are made visible. */
+        .row a[hidden], .counts[hidden] {
+          visibility: hidden;
+        }
+        .counts[hidden] {
+          display: block;
+        }
+        .row a {
+          display: block;
+          padding: 0.25em 0;
+        }
+        .row a, .row div {
+          flex: 1;
+          white-space: nowrap;
+          padding: 0 2px;
+        }
+        .row .counts {
+          padding: 0 16px;
+        }
+        .row {
+          display: flex;
+          align-items: baseline;
+          text-align: center;
+          flex-direction: row;
+        }
+        @media (max-width: 960px) {
+          :host {
+            display: inline-block;
+          }
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <div class="row">
+        <a href="${this.prevUrl}" ?hidden="${!this.prevUrl}" title="Prev" class="prev-url">
+          &lsaquo; Prev
+        </a>
+        <div class="counts" ?hidden=${!this.totalCount}>
+          ${this.currentIndex + 1} of ${this.totalCount}
+        </div>
+        <a href="${this.nextUrl}" ?hidden="${!this.nextUrl}" title="Next" class="next-url">
+          Next &rsaquo;
+        </a>
+      </div>
+      <div class="row">
+        <a href="${this.listUrl}" ?hidden="${!this.listUrl}" title="Back to list" class="list-url">
+          Back to list
+        </a>
+      </div>
+    `;
+  }
+}
+
+window.customElements.define('mr-flipper', MrFlipper);
diff --git a/static_src/elements/issue-detail/mr-flipper/mr-flipper.test.js b/static_src/elements/issue-detail/mr-flipper/mr-flipper.test.js
new file mode 100644
index 0000000..183a8d5
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-flipper/mr-flipper.test.js
@@ -0,0 +1,75 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import MrFlipper from './mr-flipper.js';
+import sinon from 'sinon';
+
+const xssiPrefix = ')]}\'';
+
+let element;
+
+describe('mr-flipper', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-flipper');
+    document.body.appendChild(element);
+
+    sinon.stub(window, 'fetch');
+
+    const response = new window.Response(`${xssiPrefix}{"message": "Ok"}`, {
+      status: 201,
+      headers: {
+        'Content-type': 'application/json',
+      },
+    });
+    window.fetch.returns(Promise.resolve(response));
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+
+    window.fetch.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrFlipper);
+  });
+
+  it('renders links', async () => {
+    // Test DOM after properties are updated.
+    element._populateResponseData({
+      cur_index: 4,
+      total_count: 13,
+      prev_url: 'http://prevurl/',
+      next_url: 'http://nexturl/',
+      list_url: 'http://listurl/',
+    });
+
+    await element.updateComplete;
+
+    const prevUrlEl = element.shadowRoot.querySelector('a.prev-url');
+    const nextUrlEl = element.shadowRoot.querySelector('a.next-url');
+    const listUrlEl = element.shadowRoot.querySelector('a.list-url');
+    const countsEl = element.shadowRoot.querySelector('div.counts');
+
+    assert.equal(prevUrlEl.href, 'http://prevurl/');
+    assert.equal(nextUrlEl.href, 'http://nexturl/');
+    assert.equal(listUrlEl.href, 'http://listurl/');
+    assert.include(countsEl.innerText, '5 of 13');
+  });
+
+  it('fetches flipper data when queryParams change', async () => {
+    await element.updateComplete;
+
+    sinon.stub(element, 'fetchFlipperData');
+
+    element.queryParams = {id: 21, q: 'owner:me'};
+
+    sinon.assert.notCalled(element.fetchFlipperData);
+
+    await element.updateComplete;
+
+    sinon.assert.calledWith(element.fetchFlipperData, 'id=21&q=owner%3Ame');
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-issue-details/mr-issue-details.js b/static_src/elements/issue-detail/mr-issue-details/mr-issue-details.js
new file mode 100644
index 0000000..bd88b3f
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-details/mr-issue-details.js
@@ -0,0 +1,162 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as ui from 'reducers/ui.js';
+import 'elements/framework/mr-comment-content/mr-description.js';
+import '../mr-comment-list/mr-comment-list.js';
+import '../metadata/mr-edit-metadata/mr-edit-issue.js';
+import {commentListToDescriptionList} from 'shared/convertersV0.js';
+
+/**
+ * `<mr-issue-details>`
+ *
+ * This is the main details section for a given issue.
+ *
+ */
+export class MrIssueDetails extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    let comments = [];
+    let descriptions = [];
+
+    if (this.commentsByApproval && this.commentsByApproval.has('')) {
+      // Comments without an approval go into the main view.
+      const mainComments = this.commentsByApproval.get('');
+      comments = mainComments.slice(1);
+      descriptions = commentListToDescriptionList(mainComments);
+    }
+
+    return html`
+      <style>
+        mr-issue-details {
+          font-size: var(--chops-main-font-size);
+          background-color: var(--chops-white);
+          padding-bottom: 1em;
+          display: flex;
+          align-items: stretch;
+          justify-content: flex-start;
+          flex-direction: column;
+          margin: 0;
+          box-sizing: border-box;
+        }
+        h3 {
+          margin-top: 1em;
+        }
+        mr-description {
+          margin-bottom: 1em;
+        }
+        mr-edit-issue {
+          margin-top: 40px;
+        }
+      </style>
+      <mr-description .descriptionList=${descriptions}></mr-description>
+      <mr-comment-list
+        headingLevel="2"
+        .comments=${comments}
+        .commentsShownCount=${this.commentsShownCount}
+      ></mr-comment-list>
+      ${this.issuePermissions.includes('addissuecomment') ?
+        html`<mr-edit-issue></mr-edit-issue>` : ''}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      commentsByApproval: {type: Object},
+      commentsShownCount: {type: Number},
+      issuePermissions: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.commentsByApproval = new Map();
+    this.issuePermissions = [];
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.commentsByApproval = issueV0.commentsByApprovalName(state);
+    this.issuePermissions = issueV0.permissions(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    super.updated(changedProperties);
+    this._measureCommentLoadTime(changedProperties);
+  }
+
+  async _measureCommentLoadTime(changedProperties) {
+    if (!changedProperties.has('commentsByApproval')) {
+      return;
+    }
+    if (!this.commentsByApproval || this.commentsByApproval.size === 0) {
+      // For cold loads, if the GetIssue call returns before ListComments,
+      // commentsByApproval is initially set to an empty Map. Filter that out.
+      return;
+    }
+    const fullAppLoad = ui.navigationCount(store.getState()) === 1;
+    if (!(fullAppLoad || changedProperties.get('commentsByApproval'))) {
+      // For hot loads, the previous issue data is still in the Redux store, so
+      // the first update sets the comments to the previous issue's comments.
+      // We need to wait for the following update.
+      return;
+    }
+    const startMark = fullAppLoad ? undefined : 'start load issue detail page';
+    if (startMark && !performance.getEntriesByName(startMark).length) {
+      // Modifying the issue template, description, comments, or attachments
+      // triggers a comment update. We only want to include full issue loads.
+      return;
+    }
+
+    await Promise.all(_subtreeUpdateComplete(this));
+
+    const endMark = 'finish load issue detail comments';
+    performance.mark(endMark);
+
+    const measurementType = fullAppLoad ? 'from outside app' : 'within app';
+    const measurementName = `load issue detail page (${measurementType})`;
+    performance.measure(measurementName, startMark, endMark);
+
+    const measurement =
+      performance.getEntriesByName(measurementName)[0].duration;
+    window.getTSMonClient().recordIssueCommentsLoadTiming(
+        measurement, fullAppLoad);
+
+    // Be sure to clear this mark even on full page navigations.
+    performance.clearMarks('start load issue detail page');
+    performance.clearMarks(endMark);
+    performance.clearMeasures(measurementName);
+  }
+}
+
+/**
+ * Recursively traverses all shadow DOMs in an element subtree and returns an
+ * Array containing the updateComplete Promises for all lit-element nodes.
+ * @param {!LitElement} element
+ * @return {!Array<Promise<Boolean>>}
+ */
+function _subtreeUpdateComplete(element) {
+  if (!element.updateComplete) {
+    return [];
+  }
+
+  const context = element.shadowRoot ? element.shadowRoot : element;
+  const children = context.querySelectorAll('*');
+  const childPromises = Array.from(children, (e) => _subtreeUpdateComplete(e));
+  return [element.updateComplete].concat(...childPromises);
+}
+
+customElements.define('mr-issue-details', MrIssueDetails);
diff --git a/static_src/elements/issue-detail/mr-issue-details/mr-issue-details.test.js b/static_src/elements/issue-detail/mr-issue-details/mr-issue-details.test.js
new file mode 100644
index 0000000..3919e15
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-details/mr-issue-details.test.js
@@ -0,0 +1,39 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueDetails} from './mr-issue-details.js';
+
+let element;
+
+describe('mr-issue-details', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-details');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueDetails);
+  });
+
+  it('mr-edit-issue is displayed if user has addissuecomment', async () => {
+    element.issuePermissions = ['addissuecomment'];
+
+    await element.updateComplete;
+
+    assert.isNotNull(element.querySelector('mr-edit-issue'));
+  });
+
+  it('mr-edit-issue is hidden if user has no addissuecomment', async () => {
+    element.issuePermissions = [];
+
+    await element.updateComplete;
+
+    assert.isNull(element.querySelector('mr-edit-issue'));
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-issue-page/mr-issue-header.js b/static_src/elements/issue-detail/mr-issue-page/mr-issue-header.js
new file mode 100644
index 0000000..0d04d32
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-page/mr-issue-header.js
@@ -0,0 +1,379 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import 'elements/issue-detail/mr-flipper/mr-flipper.js';
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import 'elements/chops/chops-timestamp/chops-timestamp.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import {userIsMember} from 'shared/helpers.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import 'elements/framework/links/mr-user-link/mr-user-link.js';
+import 'elements/framework/links/mr-crbug-link/mr-crbug-link.js';
+import 'elements/framework/mr-pref-toggle/mr-pref-toggle.js';
+import 'elements/framework/mr-dropdown/mr-dropdown.js';
+import {ISSUE_EDIT_PERMISSION, ISSUE_DELETE_PERMISSION,
+  ISSUE_FLAGSPAM_PERMISSION} from 'shared/consts/permissions.js';
+import {issueToIssueRef} from 'shared/convertersV0.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import {AVAILABLE_MD_PROJECTS, DEFAULT_MD_PROJECTS} from 'shared/md-helper.js';
+
+const DELETE_ISSUE_CONFIRMATION_NOTICE = `\
+Normally, you would just close issues by setting their status to a closed value.
+Are you sure you want to delete this issue?`;
+
+
+/**
+ * `<mr-issue-header>`
+ *
+ * The header for a given launch issue.
+ *
+ */
+export class MrIssueHeader extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          width: 100%;
+          margin-top: 0;
+          font-size: var(--chops-large-font-size);
+          background-color: var(--monorail-metadata-toggled-bg);
+          border-bottom: var(--chops-normal-border);
+          padding: 0.25em 8px;
+          box-sizing: border-box;
+          display: flex;
+          flex-direction: row;
+          justify-content: space-between;
+          align-items: center;
+        }
+        h1 {
+          font-size: 100%;
+          line-height: 140%;
+          font-weight: bolder;
+          padding: 0;
+          margin: 0;
+        }
+        mr-flipper {
+          border-left: var(--chops-normal-border);
+          padding-left: 8px;
+          margin-left: 4px;
+          font-size: var(--chops-main-font-size);
+        }
+        mr-pref-toggle {
+          margin-right: 2px;
+        }
+        .issue-actions {
+          min-width: fit-content;
+          display: flex;
+          flex-direction: row;
+          align-items: center;
+          font-size: var(--chops-main-font-size);
+        }
+        .issue-actions div {
+          min-width: 70px;
+          display: flex;
+          justify-content: space-between;
+        }
+        .spam-notice {
+          display: inline-flex;
+          align-items: center;
+          justify-content: center;
+          padding: 1px 6px;
+          border-radius: 3px;
+          background: #F44336;
+          color: var(--chops-white);
+          font-weight: bold;
+          font-size: var(--chops-main-font-size);
+          margin-right: 4px;
+        }
+        .byline {
+          display: block;
+          font-size: var(--chops-main-font-size);
+          width: 100%;
+          line-height: 140%;
+          color: var(--chops-primary-font-color);
+        }
+        .role-label {
+          background-color: var(--chops-gray-600);
+          border-radius: 3px;
+          color: var(--chops-white);
+          display: inline-block;
+          padding: 2px 4px;
+          font-size: 75%;
+          font-weight: bold;
+          line-height: 14px;
+          vertical-align: text-bottom;
+          margin-left: 16px;
+        }
+        .main-text-outer {
+          flex-basis: 100%;
+          display: flex;
+          justify-content: flex-start;
+          flex-direction: row;
+          align-items: center;
+        }
+        .main-text {
+          flex-basis: 100%;
+        }
+        @media (max-width: 840px) {
+          :host {
+            flex-wrap: wrap;
+            justify-content: center;
+          }
+          .main-text {
+            width: 100%;
+            margin-bottom: 0.5em;
+          }
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    const reporterIsMember = userIsMember(
+        this.issue.reporterRef, this.issue.projectName, this.usersProjects);
+    const markdownEnabled = AVAILABLE_MD_PROJECTS.has(this.projectName);
+    const markdownDefaultOn = DEFAULT_MD_PROJECTS.has(this.projectName);
+    return html`
+      <div class="main-text-outer">
+        <div class="main-text">
+          <h1>
+            ${this.issue.isSpam ? html`
+              <span class="spam-notice">Spam</span>
+            `: ''}
+            Issue ${this.issue.localId}: ${this.issue.summary}
+          </h1>
+          <small class="byline">
+            Reported by
+            <mr-user-link
+              .userRef=${this.issue.reporterRef}
+              aria-label="issue reporter"
+            ></mr-user-link>
+            on <chops-timestamp .timestamp=${this.issue.openedTimestamp}></chops-timestamp>
+            ${reporterIsMember ? html`
+              <span class="role-label">Project Member</span>` : ''}
+          </small>
+        </div>
+      </div>
+      <div class="issue-actions">
+        <div>
+          <mr-crbug-link .issue=${this.issue}></mr-crbug-link>
+          <mr-pref-toggle
+            .userDisplayName=${this.userDisplayName}
+            label="Code"
+            title="Code font"
+            prefName="code_font"
+          ></mr-pref-toggle>
+          ${markdownEnabled ? html`
+            <mr-pref-toggle
+              .userDisplayName=${this.userDisplayName}
+              initialValue=${markdownDefaultOn}
+              label="Markdown"
+              title="Render in markdown"
+              prefName="render_markdown"
+            ></mr-pref-toggle> ` : ''}
+        </div>
+        ${this._issueOptions.length ? html`
+          <mr-dropdown
+            .items=${this._issueOptions}
+            icon="more_vert"
+            label="Issue options"
+          ></mr-dropdown>
+        ` : ''}
+        <mr-flipper></mr-flipper>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      userDisplayName: {type: String},
+      issue: {type: Object},
+      issuePermissions: {type: Object},
+      isRestricted: {type: Boolean},
+      projectTemplates: {type: Array},
+      projectName: {type: String},
+      usersProjects: {type: Object},
+      _action: {type: String},
+      _targetProjectError: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.issuePermissions = [];
+    this.projectTemplates = [];
+    this.projectName = '';
+    this.issue = {};
+    this.usersProjects = new Map();
+    this.isRestricted = false;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.issue = issueV0.viewedIssue(state);
+    this.issuePermissions = issueV0.permissions(state);
+    this.projectTemplates = projectV0.viewedTemplates(state);
+    this.projectName = projectV0.viewedProjectName(state);
+    this.usersProjects = userV0.projectsPerUser(state);
+
+    const restrictions = issueV0.restrictions(state);
+    this.isRestricted = restrictions && Object.keys(restrictions).length;
+  }
+
+  /**
+   * @return {Array<MenuItem>} Actions the user can take on the issue.
+   * @private
+   */
+  get _issueOptions() {
+    // We create two edit Arrays for the top and bottom half of the menu,
+    // to be separated by a separator in the UI.
+    const editOptions = [];
+    const riskyOptions = [];
+    const isSpam = this.issue.isSpam;
+    const isRestricted = this.isRestricted;
+
+    const permissions = this.issuePermissions;
+    const templates = this.projectTemplates;
+
+
+    if (permissions.includes(ISSUE_EDIT_PERMISSION)) {
+      editOptions.push({
+        text: 'Edit issue description',
+        handler: this._openEditDescription.bind(this),
+      });
+      if (templates.length) {
+        riskyOptions.push({
+          text: 'Convert issue template',
+          handler: this._openConvertIssue.bind(this),
+        });
+      }
+    }
+
+    if (permissions.includes(ISSUE_DELETE_PERMISSION)) {
+      riskyOptions.push({
+        text: 'Delete issue',
+        handler: this._deleteIssue.bind(this),
+      });
+      if (!isRestricted) {
+        editOptions.push({
+          text: 'Move issue',
+          handler: this._openMoveCopyIssue.bind(this, 'Move'),
+        });
+        editOptions.push({
+          text: 'Copy issue',
+          handler: this._openMoveCopyIssue.bind(this, 'Copy'),
+        });
+      }
+    }
+
+    if (permissions.includes(ISSUE_FLAGSPAM_PERMISSION)) {
+      const text = (isSpam ? 'Un-flag' : 'Flag') + ' issue as spam';
+      riskyOptions.push({
+        text,
+        handler: this._markIssue.bind(this),
+      });
+    }
+
+    if (editOptions.length && riskyOptions.length) {
+      editOptions.push({separator: true});
+    }
+    return editOptions.concat(riskyOptions);
+  }
+
+  /**
+   * Marks an issue as either spam or not spam based on whether the issue
+   * was spam.
+   */
+  _markIssue() {
+    prpcClient.call('monorail.Issues', 'FlagIssues', {
+      issueRefs: [{
+        projectName: this.issue.projectName,
+        localId: this.issue.localId,
+      }],
+      flag: !this.issue.isSpam,
+    }).then(() => {
+      store.dispatch(issueV0.fetch({
+        projectName: this.issue.projectName,
+        localId: this.issue.localId,
+      }));
+    });
+  }
+
+  /**
+   * Deletes an issue.
+   */
+  _deleteIssue() {
+    const ok = confirm(DELETE_ISSUE_CONFIRMATION_NOTICE);
+    if (ok) {
+      const issueRef = issueToIssueRef(this.issue);
+      // TODO(crbug.com/monorail/7374): Delete for the v0 -> v3 migration.
+      prpcClient.call('monorail.Issues', 'DeleteIssue', {
+        issueRef,
+        delete: true,
+      }).then(() => {
+        store.dispatch(issueV0.fetch(issueRef));
+      });
+    }
+  }
+
+  /**
+   * Launches the dialog to edit an issue's description.
+   * @fires CustomEvent#open-dialog
+   * @private
+   */
+  _openEditDescription() {
+    this.dispatchEvent(new CustomEvent('open-dialog', {
+      bubbles: true,
+      composed: true,
+      detail: {
+        dialogId: 'edit-description',
+        fieldName: '',
+      },
+    }));
+  }
+
+  /**
+   * Opens dialog to either move or copy an issue.
+   * @param {"move"|"copy"} action
+   * @fires CustomEvent#open-dialog
+   * @private
+   */
+  _openMoveCopyIssue(action) {
+    this.dispatchEvent(new CustomEvent('open-dialog', {
+      bubbles: true,
+      composed: true,
+      detail: {
+        dialogId: 'move-copy-issue',
+        action,
+      },
+    }));
+  }
+
+  /**
+   * Opens dialog for converting an issue.
+   * @fires CustomEvent#open-dialog
+   * @private
+   */
+  _openConvertIssue() {
+    this.dispatchEvent(new CustomEvent('open-dialog', {
+      bubbles: true,
+      composed: true,
+      detail: {
+        dialogId: 'convert-issue',
+      },
+    }));
+  }
+}
+
+customElements.define('mr-issue-header', MrIssueHeader);
diff --git a/static_src/elements/issue-detail/mr-issue-page/mr-issue-header.test.js b/static_src/elements/issue-detail/mr-issue-page/mr-issue-header.test.js
new file mode 100644
index 0000000..25ab0e7
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-page/mr-issue-header.test.js
@@ -0,0 +1,167 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrIssueHeader} from './mr-issue-header.js';
+import {store, resetState} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {ISSUE_EDIT_PERMISSION, ISSUE_DELETE_PERMISSION,
+  ISSUE_FLAGSPAM_PERMISSION} from 'shared/consts/permissions.js';
+
+let element;
+
+describe('mr-issue-header', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+    element = document.createElement('mr-issue-header');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueHeader);
+  });
+
+  it('updating issue id changes header', () => {
+    store.dispatch({type: issueV0.VIEW_ISSUE,
+      issueRef: {localId: 1, projectName: 'test'}});
+    store.dispatch({type: issueV0.FETCH_SUCCESS,
+      issue: {localId: 1, projectName: 'test', summary: 'test'}});
+
+    assert.deepEqual(element.issue, {localId: 1, projectName: 'test',
+      summary: 'test'});
+  });
+
+  it('_issueOptions toggles spam', () => {
+    element.issuePermissions = [ISSUE_FLAGSPAM_PERMISSION];
+    element.issue = {isSpam: false};
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Flag issue as spam'));
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Un-flag issue as spam'));
+
+    element.issue = {isSpam: true};
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Flag issue as spam'));
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Un-flag issue as spam'));
+
+    element.issuePermissions = [];
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Flag issue as spam'));
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Un-flag issue as spam'));
+
+    element.issue = {isSpam: false};
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Flag issue as spam'));
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Un-flag issue as spam'));
+  });
+
+  it('_issueOptions toggles convert issue', () => {
+    element.issuePermissions = [];
+    element.projectTemplates = [];
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Convert issue template'));
+
+    element.projectTemplates = [{templateName: 'test'}];
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Convert issue template'));
+
+    element.issuePermissions = [ISSUE_EDIT_PERMISSION];
+    element.projectTemplates = [];
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Convert issue template'));
+
+    element.projectTemplates = [{templateName: 'test'}];
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Convert issue template'));
+  });
+
+  it('_issueOptions toggles delete', () => {
+    element.issuePermissions = [ISSUE_DELETE_PERMISSION];
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Delete issue'));
+
+    element.issuePermissions = [];
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Delete issue'));
+  });
+
+  it('_issueOptions toggles move and copy', () => {
+    element.issuePermissions = [ISSUE_DELETE_PERMISSION];
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Move issue'));
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Copy issue'));
+
+    element.isRestricted = true;
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Move issue'));
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Copy issue'));
+
+    element.issuePermissions = [];
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Move issue'));
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Copy issue'));
+  });
+
+  it('_issueOptions toggles edit description', () => {
+    element.issuePermissions = [ISSUE_EDIT_PERMISSION];
+    assert.isDefined(findOptionWithText(element._issueOptions,
+        'Edit issue description'));
+
+    element.issuePermissions = [];
+
+    assert.isUndefined(findOptionWithText(element._issueOptions,
+        'Edit issue description'));
+  });
+
+  it('markdown toggle renders on enabled projects', async () => {
+    element.projectName = 'monkeyrail';
+
+    await element.updateComplete;
+
+    // This looks for how many mr-pref-toggle buttons there are,
+    // if there are two then this project also renders on markdown.
+    const chopsToggles = element.shadowRoot.querySelectorAll('mr-pref-toggle');
+    assert.equal(chopsToggles.length, 2);
+
+  });
+
+  it('markdown toggle does not render on disabled projects', async () => {
+    element.projectName = 'moneyrail';
+
+    await element.updateComplete;
+
+    const chopsToggles = element.shadowRoot.querySelectorAll('mr-pref-toggle');
+    assert.equal(chopsToggles.length, 1);
+  });
+
+  it('markdown toggle is on by default on enabled projects', async () => {
+    element.projectName = 'monkeyrail';
+
+    await element.updateComplete;
+    
+    const chopsToggles = element.shadowRoot.querySelectorAll('mr-pref-toggle');
+    const markdownButton = chopsToggles[1];
+    assert.equal("true", markdownButton.getAttribute('initialvalue'));
+  });
+});
+
+function findOptionWithText(issueOptions, text) {
+  return issueOptions.find((option) => option.text === text);
+}
diff --git a/static_src/elements/issue-detail/mr-issue-page/mr-issue-page.js b/static_src/elements/issue-detail/mr-issue-page/mr-issue-page.js
new file mode 100644
index 0000000..a93822b
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-page/mr-issue-page.js
@@ -0,0 +1,393 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import page from 'page';
+import {LitElement, html} from 'lit-element';
+
+import 'elements/chops/chops-button/chops-button.js';
+import './mr-issue-header.js';
+import './mr-restriction-indicator';
+import '../mr-issue-details/mr-issue-details.js';
+import '../metadata/mr-metadata/mr-issue-metadata.js';
+import '../mr-launch-overview/mr-launch-overview.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+
+import {ISSUE_DELETE_PERMISSION} from 'shared/consts/permissions.js';
+
+// eslint-disable-next-line max-len
+import 'elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.js';
+import '../dialogs/mr-edit-description/mr-edit-description.js';
+import '../dialogs/mr-move-copy-issue/mr-move-copy-issue.js';
+import '../dialogs/mr-convert-issue/mr-convert-issue.js';
+import '../dialogs/mr-related-issues/mr-related-issues.js';
+import '../../help/mr-click-throughs/mr-click-throughs.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+const APPROVAL_COMMENT_COUNT = 5;
+const DETAIL_COMMENT_COUNT = 100;
+
+/**
+ * `<mr-issue-page>`
+ *
+ * The main entry point for a Monorail issue detail page.
+ *
+ */
+export class MrIssuePage extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+      <style>
+        mr-issue-page {
+          --mr-issue-page-horizontal-padding: 12px;
+          --mr-toggled-font-family: inherit;
+          --monorail-metadata-toggled-bg: var(--monorail-metadata-open-bg);
+        }
+        mr-issue-page[issueClosed] {
+          --monorail-metadata-toggled-bg: var(--monorail-metadata-closed-bg);
+        }
+        mr-issue-page[codeFont] {
+          --mr-toggled-font-family: Monospace;
+        }
+        .container-issue {
+          width: 100%;
+          flex-direction: column;
+          align-items: stretch;
+          justify-content: flex-start;
+          z-index: 200;
+        }
+        .container-issue-content {
+          padding: 0;
+          flex-grow: 1;
+          display: flex;
+          align-items: stretch;
+          justify-content: space-between;
+          flex-direction: row;
+          flex-wrap: nowrap;
+          box-sizing: border-box;
+          padding-top: 0.5em;
+        }
+        .container-outside {
+          box-sizing: border-box;
+          width: 100%;
+          max-width: 100%;
+          margin: auto;
+          padding: 0;
+          display: flex;
+          align-items: stretch;
+          justify-content: space-between;
+          flex-direction: row;
+          flex-wrap: no-wrap;
+        }
+        .container-no-issue {
+          padding: 0.5em 16px;
+          font-size: var(--chops-large-font-size);
+        }
+        .metadata-container {
+          font-size: var(--chops-main-font-size);
+          background: var(--monorail-metadata-toggled-bg);
+          border-right: var(--chops-normal-border);
+          border-bottom: var(--chops-normal-border);
+          width: 24em;
+          min-width: 256px;
+          flex-grow: 0;
+          flex-shrink: 0;
+          box-sizing: border-box;
+          z-index: 100;
+        }
+        .issue-header-container {
+          z-index: 10;
+          position: sticky;
+          top: var(--monorail-header-height);
+          margin-bottom: 0.25em;
+          width: 100%;
+        }
+        mr-issue-details {
+          min-width: 50%;
+          max-width: 1000px;
+          flex-grow: 1;
+          box-sizing: border-box;
+          min-height: 100%;
+          padding-left: var(--mr-issue-page-horizontal-padding);
+          padding-right: var(--mr-issue-page-horizontal-padding);
+        }
+        mr-issue-metadata {
+          position: sticky;
+          overflow-y: auto;
+          top: var(--monorail-header-height);
+          height: calc(100vh - var(--monorail-header-height));
+        }
+        mr-launch-overview {
+          border-left: var(--chops-normal-border);
+          padding-left: var(--mr-issue-page-horizontal-padding);
+          padding-right: var(--mr-issue-page-horizontal-padding);
+          flex-grow: 0;
+          flex-shrink: 0;
+          width: 50%;
+          box-sizing: border-box;
+          min-height: 100%;
+        }
+        @media (max-width: 1126px) {
+          .container-issue-content {
+            flex-direction: column;
+            padding: 0 var(--mr-issue-page-horizontal-padding);
+          }
+          mr-issue-details, mr-launch-overview {
+            width: 100%;
+            padding: 0;
+            border: 0;
+          }
+        }
+        @media (max-width: 840px) {
+          .container-outside {
+            flex-direction: column;
+          }
+          .metadata-container {
+            width: 100%;
+            height: auto;
+            border: 0;
+            border-bottom: var(--chops-normal-border);
+          }
+          mr-issue-metadata {
+            min-width: auto;
+            max-width: auto;
+            width: 100%;
+            padding: 0;
+            min-height: 0;
+            border: 0;
+          }
+          mr-issue-metadata, .issue-header-container {
+            position: static;
+          }
+        }
+      </style>
+      <mr-click-throughs
+         .userDisplayName=${this.userDisplayName}></mr-click-throughs>
+      ${this._renderIssue()}
+    `;
+  }
+
+  /**
+   * Render the issue.
+   * @return {TemplateResult}
+   */
+  _renderIssue() {
+    const issueIsEmpty = !this.issue || !this.issue.localId;
+    const movedToRef = this.issue.movedToRef;
+    const commentShown = this.issue.approvalValues ? APPROVAL_COMMENT_COUNT :
+      DETAIL_COMMENT_COUNT;
+
+    if (this.fetchIssueError) {
+      return html`
+        <div class="container-no-issue" id="fetch-error">
+          ${this.fetchIssueError.description}
+        </div>
+      `;
+    }
+
+    if (this.fetchingIssue && issueIsEmpty) {
+      return html`
+        <div class="container-no-issue" id="loading">
+          Loading...
+        </div>
+      `;
+    }
+
+    if (this.issue.isDeleted) {
+      return html`
+        <div class="container-no-issue" id="deleted">
+          <p>Issue ${this.issueRef.localId} has been deleted.</p>
+          ${this.issuePermissions.includes(ISSUE_DELETE_PERMISSION) ? html`
+            <chops-button
+              @click=${this._undeleteIssue}
+              class="undelete emphasized"
+            >
+              Undelete Issue
+            </chops-button>
+          `: ''}
+        </div>
+      `;
+    }
+
+    if (movedToRef && movedToRef.localId) {
+      return html`
+        <div class="container-no-issue" id="moved">
+          <h2>Issue has moved.</h2>
+          <p>
+            This issue was moved to ${movedToRef.projectName}.
+            <a
+              class="new-location"
+              href="/p/${movedToRef.projectName}/issues/detail?id=${movedToRef.localId}"
+            >
+              Go to issue</a>.
+          </p>
+        </div>
+      `;
+    }
+
+    if (!issueIsEmpty) {
+      return html`
+        <div
+          class="container-outside"
+          @open-dialog=${this._openDialog}
+          id="issue"
+        >
+          <aside class="metadata-container">
+            <mr-issue-metadata></mr-issue-metadata>
+          </aside>
+          <div class="container-issue">
+            <div class="issue-header-container">
+              <mr-issue-header
+                .userDisplayName=${this.userDisplayName}
+              ></mr-issue-header>
+              <mr-restriction-indicator></mr-restriction-indicator>
+            </div>
+            <div class="container-issue-content">
+              <mr-issue-details
+                class="main-item"
+                .commentsShownCount=${commentShown}
+              ></mr-issue-details>
+              <mr-launch-overview class="main-item"></mr-launch-overview>
+            </div>
+          </div>
+        </div>
+        <mr-edit-description id="edit-description"></mr-edit-description>
+        <mr-move-copy-issue id="move-copy-issue"></mr-move-copy-issue>
+        <mr-convert-issue id="convert-issue"></mr-convert-issue>
+        <mr-related-issues id="reorder-related-issues"></mr-related-issues>
+        <mr-update-issue-hotlists-dialog
+          id="update-issue-hotlists"
+          .issueRefs=${[this.issueRef]}
+          .issueHotlists=${this.issueHotlists}
+        ></mr-update-issue-hotlists-dialog>
+      `;
+    }
+
+    return '';
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      userDisplayName: {type: String},
+      // Redux state.
+      fetchIssueError: {type: String},
+      fetchingIssue: {type: Boolean},
+      fetchingProjectConfig: {type: Boolean},
+      issue: {type: Object},
+      issueHotlists: {type: Array},
+      issueClosed: {
+        type: Boolean,
+        reflect: true,
+      },
+      codeFont: {
+        type: Boolean,
+        reflect: true,
+      },
+      issuePermissions: {type: Object},
+      issueRef: {type: Object},
+      prefs: {type: Object},
+      loginUrl: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.issue = {};
+    this.issueRef = {};
+    this.issuePermissions = [];
+    this.prefs = {};
+    this.codeFont = false;
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.projectName = projectV0.viewedProjectName(state);
+    this.issue = issueV0.viewedIssue(state);
+    this.issueHotlists = issueV0.hotlists(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.fetchIssueError = issueV0.requests(state).fetch.error;
+    this.fetchingIssue = issueV0.requests(state).fetch.requesting;
+    this.fetchingProjectConfig = projectV0.fetchingConfig(state);
+    this.issueClosed = !issueV0.isOpen(state);
+    this.issuePermissions = issueV0.permissions(state);
+    this.prefs = userV0.prefs(state);
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('prefs')) {
+      this.codeFont = !!this.prefs.get('code_font');
+    }
+    if (changedProperties.has('fetchIssueError') &&
+      !this.userDisplayName && this.fetchIssueError &&
+      this.fetchIssueError.codeName === 'PERMISSION_DENIED') {
+      page(this.loginUrl);
+    }
+    super.update(changedProperties);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('issueRef') || changedProperties.has('issue')) {
+      const title = this._pageTitle(this.issueRef, this.issue);
+      store.dispatch(sitewide.setPageTitle(title));
+    }
+  }
+
+  /**
+   * Generates a title for the currently viewed page based on issue data.
+   * @param {IssueRef} issueRef
+   * @param {Issue} issue
+   * @return {string}
+   */
+  _pageTitle(issueRef, issue) {
+    const titlePieces = [];
+    if (issueRef.localId) {
+      titlePieces.push(issueRef.localId);
+    }
+    if (!issue || !issue.localId) {
+      // Issue is not loaded.
+      titlePieces.push('Loading issue...');
+    } else {
+      if (issue.isDeleted) {
+        titlePieces.push('Deleted issue');
+      } else if (issue.summary) {
+        titlePieces.push(issue.summary);
+      }
+    }
+    return titlePieces.join(' - ');
+  }
+
+  /**
+   * Opens a dialog with a specific ID based on an Event.
+   * @param {CustomEvent} e
+   */
+  _openDialog(e) {
+    this.querySelector('#' + e.detail.dialogId).open(e);
+  }
+
+  /**
+   * Undeletes the current issue.
+   */
+  _undeleteIssue() {
+    prpcClient.call('monorail.Issues', 'DeleteIssue', {
+      issueRef: this.issueRef,
+      delete: false,
+    }).then(() => {
+      store.dispatch(issueV0.fetchIssuePageData(this.issueRef));
+    });
+  }
+}
+
+customElements.define('mr-issue-page', MrIssuePage);
diff --git a/static_src/elements/issue-detail/mr-issue-page/mr-issue-page.test.js b/static_src/elements/issue-detail/mr-issue-page/mr-issue-page.test.js
new file mode 100644
index 0000000..31edd4c
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-page/mr-issue-page.test.js
@@ -0,0 +1,272 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrIssuePage} from './mr-issue-page.js';
+import {store, resetState} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+let element;
+let loadingElement;
+let fetchErrorElement;
+let deletedElement;
+let movedElement;
+let issueElement;
+
+function populateElementReferences() {
+  loadingElement = element.querySelector('#loading');
+  fetchErrorElement = element.querySelector('#fetch-error');
+  deletedElement = element.querySelector('#deleted');
+  movedElement = element.querySelector('#moved');
+  issueElement = element.querySelector('#issue');
+}
+
+describe('mr-issue-page', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+    element = document.createElement('mr-issue-page');
+    document.body.appendChild(element);
+    sinon.stub(prpcClient, 'call');
+    // TODO(ehmaldonado): Remove once the old autocomplete code is deprecated.
+    window.TKR_populateAutocomplete = () => {};
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    prpcClient.call.restore();
+    // TODO(ehmaldonado): Remove once the old autocomplete code is deprecated.
+    window.TKR_populateAutocomplete = undefined;
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssuePage);
+  });
+
+  describe('_pageTitle', () => {
+    it('displays loading when no issue', () => {
+      assert.equal(element._pageTitle({}, {}), 'Loading issue...');
+    });
+
+    it('display issue ID when available', () => {
+      assert.equal(element._pageTitle({projectName: 'test', localId: 1}, {}),
+          '1 - Loading issue...');
+    });
+
+    it('display deleted issues', () => {
+      assert.equal(element._pageTitle({projectName: 'test', localId: 1},
+          {projectName: 'test', localId: 1, isDeleted: true},
+      ), '1 - Deleted issue');
+    });
+
+    it('displays loaded issue', () => {
+      assert.equal(element._pageTitle({projectName: 'test', localId: 2},
+          {projectName: 'test', localId: 2, summary: 'test'}), '2 - test');
+    });
+  });
+
+  it('issue not loaded yet', async () => {
+    // Prevent unrelated Redux changes from affecting this test.
+    // TODO(zhangtiff): Find a more canonical way to test components
+    // in and out of Redux.
+    sinon.stub(store, 'dispatch');
+
+    element.fetchingIssue = true;
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNotNull(loadingElement);
+    assert.isNull(fetchErrorElement);
+    assert.isNull(deletedElement);
+    assert.isNull(issueElement);
+
+    store.dispatch.restore();
+  });
+
+  it('no loading on future issue fetches', async () => {
+    element.issue = {localId: 222};
+    element.fetchingIssue = true;
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNull(loadingElement);
+    assert.isNull(fetchErrorElement);
+    assert.isNull(deletedElement);
+    assert.isNotNull(issueElement);
+  });
+
+  it('fetch error', async () => {
+    element.fetchingIssue = false;
+    element.fetchIssueError = 'error';
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNull(loadingElement);
+    assert.isNotNull(fetchErrorElement);
+    assert.isNull(deletedElement);
+    assert.isNull(issueElement);
+  });
+
+  it('deleted issue', async () => {
+    element.fetchingIssue = false;
+    element.issue = {isDeleted: true};
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNull(loadingElement);
+    assert.isNull(fetchErrorElement);
+    assert.isNotNull(deletedElement);
+    assert.isNull(issueElement);
+  });
+
+  it('normal issue', async () => {
+    element.fetchingIssue = false;
+    element.issue = {localId: 111};
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNull(loadingElement);
+    assert.isNull(fetchErrorElement);
+    assert.isNull(deletedElement);
+    assert.isNotNull(issueElement);
+  });
+
+  it('code font pref toggles attribute', async () => {
+    await element.updateComplete;
+
+    assert.isFalse(element.hasAttribute('codeFont'));
+
+    element.prefs = new Map([['code_font', true]]);
+    await element.updateComplete;
+
+    assert.isTrue(element.hasAttribute('codeFont'));
+
+    element.prefs = new Map([['code_font', false]]);
+    await element.updateComplete;
+
+    assert.isFalse(element.hasAttribute('codeFont'));
+  });
+
+  it('undeleting issue only shown if you have permissions', async () => {
+    sinon.stub(store, 'dispatch');
+
+    element.issue = {isDeleted: true};
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNotNull(deletedElement);
+
+    let button = element.querySelector('.undelete');
+    assert.isNull(button);
+
+    element.issuePermissions = ['deleteissue'];
+    await element.updateComplete;
+
+    button = element.querySelector('.undelete');
+    assert.isNotNull(button);
+
+    store.dispatch.restore();
+  });
+
+  it('undeleting issue updates page with issue', async () => {
+    const issueRef = {localId: 111, projectName: 'test'};
+    const deletedIssuePromise = Promise.resolve({
+      issue: {isDeleted: true},
+    });
+    const issuePromise = Promise.resolve({
+      issue: {localId: 111, projectName: 'test'},
+    });
+    const deletePromise = Promise.resolve({});
+
+    sinon.spy(element, '_undeleteIssue');
+
+    prpcClient.call.withArgs('monorail.Issues', 'GetIssue', {issueRef})
+        .onFirstCall().returns(deletedIssuePromise)
+        .onSecondCall().returns(issuePromise);
+    prpcClient.call.withArgs('monorail.Issues', 'DeleteIssue',
+        {delete: false, issueRef}).returns(deletePromise);
+
+    store.dispatch(issueV0.viewIssue(issueRef));
+    store.dispatch(issueV0.fetchIssuePageData(issueRef));
+
+    await deletedIssuePromise;
+    await element.updateComplete;
+
+    populateElementReferences();
+
+    assert.deepEqual(element.issue,
+        {isDeleted: true, localId: 111, projectName: 'test'});
+    assert.isNull(issueElement);
+    assert.isNotNull(deletedElement);
+
+    // Make undelete button visible. This must be after deletedIssuePromise
+    // resolves since issuePermissions are cleared by Redux after that promise.
+    element.issuePermissions = ['deleteissue'];
+    await element.updateComplete;
+
+    const button = element.querySelector('.undelete');
+    button.click();
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Issues', 'GetIssue',
+        {issueRef});
+    sinon.assert.calledWith(prpcClient.call, 'monorail.Issues', 'DeleteIssue',
+        {delete: false, issueRef});
+
+    await deletePromise;
+    await issuePromise;
+    await element.updateComplete;
+
+    assert.isTrue(element._undeleteIssue.calledOnce);
+
+    assert.deepEqual(element.issue, {localId: 111, projectName: 'test'});
+
+    await element.updateComplete;
+
+    populateElementReferences();
+    assert.isNotNull(issueElement);
+
+    element._undeleteIssue.restore();
+  });
+
+  it('issue has moved', async () => {
+    element.fetchingIssue = false;
+    element.issue = {movedToRef: {projectName: 'hello', localId: 10}};
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNull(issueElement);
+    assert.isNull(deletedElement);
+    assert.isNotNull(movedElement);
+
+    const link = movedElement.querySelector('.new-location');
+    assert.equal(link.getAttribute('href'), '/p/hello/issues/detail?id=10');
+  });
+
+  it('moving to a restricted issue', async () => {
+    element.fetchingIssue = false;
+    element.issue = {localId: 111};
+
+    await element.updateComplete;
+
+    element.issue = {localId: 222};
+    element.fetchIssueError = 'error';
+
+    await element.updateComplete;
+    populateElementReferences();
+
+    assert.isNull(loadingElement);
+    assert.isNotNull(fetchErrorElement);
+    assert.isNull(deletedElement);
+    assert.isNull(movedElement);
+    assert.isNull(issueElement);
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-issue-page/mr-restriction-indicator.js b/static_src/elements/issue-detail/mr-issue-page/mr-restriction-indicator.js
new file mode 100644
index 0000000..af558a4
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-page/mr-restriction-indicator.js
@@ -0,0 +1,178 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import {arrayToEnglish} from 'shared/helpers.js';
+
+
+/**
+ * `<mr-restriction-indicator>`
+ *
+ * Display for showing whether an issue is restricted.
+ *
+ */
+export class MrRestrictionIndicator extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        width: 100%;
+        margin-top: 0;
+        background-color: var(--monorail-metadata-toggled-bg);
+        border-bottom: var(--chops-normal-border);
+        font-size: var(--chops-main-font-size);
+        padding: 0.25em 8px;
+        box-sizing: border-box;
+        display: flex;
+        flex-direction: row;
+        justify-content: flex-start;
+        align-items: center;
+      }
+      :host([showWarning]) {
+        background-color: var(--chops-red-700);
+        color: var(--chops-white);
+        font-weight: bold;
+      }
+      :host([showWarning]) i {
+        color: var(--chops-white);
+      }
+      :host([hidden]) {
+        display: none;
+      }
+      i.material-icons {
+        color: var(--chops-primary-icon-color);
+        font-size: var(--chops-icon-font-size);
+      }
+      .lock-icon {
+        margin-right: 4px;
+      }
+      i.warning-icon {
+        margin-right: 4px;
+      }
+      i[hidden] {
+        display: none;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <i
+        class="lock-icon material-icons"
+        icon="lock"
+        ?hidden=${!this._restrictionText}
+        title=${this._restrictionText}
+      >
+        lock
+      </i>
+      <i
+        class="warning-icon material-icons"
+        icon="warning"
+        ?hidden=${!this.showWarning}
+        title=${this._warningText}
+      >
+        warning
+      </i>
+      ${this._combinedText}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      restrictions: Object,
+      prefs: Object,
+      hidden: {
+        type: Boolean,
+        reflect: true,
+      },
+      showWarning: {
+        type: Boolean,
+        reflect: true,
+      },
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.hidden = true;
+    this.showWarning = false;
+    this.prefs = {};
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.restrictions = issueV0.restrictions(state);
+    this.prefs = userV0.prefs(state);
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('prefs') ||
+        changedProperties.has('restrictions')) {
+      this.hidden = !this._combinedText;
+
+      this.showWarning = !!this._warningText;
+    }
+
+    super.update(changedProperties);
+  }
+
+  /**
+   * Checks if the user should see a corp mode warning about an issue being
+   * public.
+   * @return {string}
+   */
+  get _warningText() {
+    const {restrictions, prefs} = this;
+    if (!prefs) return '';
+    if (!restrictions) return '';
+    if ('view' in restrictions && restrictions['view'].length) return '';
+    if (prefs.get('public_issue_notice')) {
+      return 'Public issue: Please do not post confidential information.';
+    }
+    return '';
+  }
+
+  /**
+   * Gets either corp mode or restricted issue text depending on which
+   * is relevant to the issue.
+   * @return {string}
+   */
+  get _combinedText() {
+    if (this._warningText) return this._warningText;
+    return this._restrictionText;
+  }
+
+  /**
+   * Computes the text to show users on a restricted issue.
+   * @return {string}
+   */
+  get _restrictionText() {
+    const {restrictions} = this;
+    if (!restrictions) return;
+    if ('view' in restrictions && restrictions['view'].length) {
+      return `Only users with ${arrayToEnglish(restrictions['view'])
+      } permission or issue reporter may view.`;
+    } else if ('edit' in restrictions && restrictions['edit'].length) {
+      return `Only users with ${arrayToEnglish(restrictions['edit'])
+      } permission may edit.`;
+    } else if ('comment' in restrictions && restrictions['comment'].length) {
+      return `Only users with ${arrayToEnglish(restrictions['comment'])
+      } permission or issue reporter may comment.`;
+    }
+    return '';
+  }
+}
+
+customElements.define('mr-restriction-indicator', MrRestrictionIndicator);
diff --git a/static_src/elements/issue-detail/mr-issue-page/mr-restriction-indicator.test.js b/static_src/elements/issue-detail/mr-issue-page/mr-restriction-indicator.test.js
new file mode 100644
index 0000000..3afbbcb
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-issue-page/mr-restriction-indicator.test.js
@@ -0,0 +1,130 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrRestrictionIndicator} from './mr-restriction-indicator.js';
+
+let element;
+
+describe('mr-restriction-indicator', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-restriction-indicator');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrRestrictionIndicator);
+  });
+
+  it('shows element only when restricted or showWarning', async () => {
+    await element.updateComplete;
+
+    assert.isTrue(element.hasAttribute('hidden'));
+
+    element.restrictions = {view: ['Google']};
+    await element.updateComplete;
+
+    assert.isFalse(element.hasAttribute('hidden'));
+
+    element.restrictions = {};
+    await element.updateComplete;
+
+    assert.isTrue(element.hasAttribute('hidden'));
+
+    element.prefs = new Map([['public_issue_notice', true]]);
+    await element.updateComplete;
+
+    assert.isFalse(element.hasAttribute('hidden'));
+
+    element.prefs = new Map([['public_issue_notice', false]]);
+    await element.updateComplete;
+
+    assert.isTrue(element.hasAttribute('hidden'));
+
+    element.prefs = new Map([]);
+    await element.updateComplete;
+
+    assert.isTrue(element.hasAttribute('hidden'));
+
+    // It is possible to have an edit or comment restriction on
+    // a public issue when the user is opted in to public issue notices.
+    // In that case, the lock icon is shown, plus a warning icon and the
+    // public issue notice.
+    element.restrictions = new Map([['edit', ['Google']]]);
+    element.prefs = new Map([['public_issue_notice', true]]);
+    await element.updateComplete;
+
+    assert.isFalse(element.hasAttribute('hidden'));
+  });
+
+  it('displays view restrictions', async () => {
+    element.restrictions = {
+      view: ['Google', 'hello'],
+      edit: ['Editor', 'world'],
+      comment: ['commentor'],
+    };
+
+    await element.updateComplete;
+
+    const restrictString =
+      'Only users with Google and hello permission or issue reporter may view.';
+    assert.equal(element._restrictionText, restrictString);
+
+    assert.include(element.shadowRoot.textContent, restrictString);
+  });
+
+  it('displays edit restrictions', async () => {
+    element.restrictions = {
+      view: [],
+      edit: ['Editor', 'world'],
+      comment: ['commentor'],
+    };
+
+    await element.updateComplete;
+
+    const restrictString =
+      'Only users with Editor and world permission may edit.';
+    assert.equal(element._restrictionText, restrictString);
+
+    assert.include(element.shadowRoot.textContent, restrictString);
+  });
+
+  it('displays comment restrictions', async () => {
+    element.restrictions = {
+      view: [],
+      edit: [],
+      comment: ['commentor'],
+    };
+
+    await element.updateComplete;
+
+    const restrictString =
+      'Only users with commentor permission or issue reporter may comment.';
+    assert.equal(element._restrictionText, restrictString);
+
+    assert.include(element.shadowRoot.textContent, restrictString);
+  });
+
+  it('displays public issue notice, if the user has that pref', async () => {
+    element.restrictions = {};
+
+    element.prefs = new Map();
+    assert.equal(element._restrictionText, '');
+    assert.include(element.shadowRoot.textContent, '');
+
+    element.prefs = new Map([['public_issue_notice', true]]);
+
+    await element.updateComplete;
+
+    const noticeString =
+      'Public issue: Please do not post confidential information.';
+    assert.equal(element._warningText, noticeString);
+
+    assert.include(element.shadowRoot.textContent, noticeString);
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-launch-overview/mr-launch-overview.js b/static_src/elements/issue-detail/mr-launch-overview/mr-launch-overview.js
new file mode 100644
index 0000000..741baaa
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-launch-overview/mr-launch-overview.js
@@ -0,0 +1,102 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import './mr-phase.js';
+
+/**
+ * `<mr-launch-overview>`
+ *
+ * This is a shorthand view of the phases for a user to see a quick overview.
+ *
+ */
+export class MrLaunchOverview extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
+            rel="stylesheet">
+      <style>
+        mr-launch-overview {
+          max-width: 100%;
+          display: flex;
+          flex-flow: column;
+          justify-content: flex-start;
+          align-items: stretch;
+        }
+        mr-launch-overview[hidden] {
+          display: none;
+        }
+        mr-phase {
+          margin-bottom: 0.75em;
+        }
+      </style>
+      ${this.phases.map((phase) => html`
+        <mr-phase
+          .phaseName=${phase.phaseRef.phaseName}
+          .approvals=${this._approvalsForPhase(this.approvals, phase.phaseRef.phaseName)}
+        ></mr-phase>
+      `)}
+      ${this._phaselessApprovals.length ? html`
+        <mr-phase .approvals=${this._phaselessApprovals}></mr-phase>
+      `: ''}
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      approvals: {type: Array},
+      phases: {type: Array},
+      hidden: {
+        type: Boolean,
+        reflect: true,
+      },
+    };
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.approvals = [];
+    this.phases = [];
+    this.hidden = true;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    if (!issueV0.viewedIssue(state)) return;
+
+    this.approvals = issueV0.viewedIssue(state).approvalValues || [];
+    this.phases = issueV0.viewedIssue(state).phases || [];
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('phases') || changedProperties.has('approvals')) {
+      this.hidden = !this.phases.length && !this.approvals.length;
+    }
+    super.update(changedProperties);
+  }
+
+  get _phaselessApprovals() {
+    return this._approvalsForPhase(this.approvals);
+  }
+
+  _approvalsForPhase(approvals, phaseName) {
+    return (approvals || []).filter((a) => {
+      // We can assume phase names will be unique.
+      return a.phaseRef.phaseName == phaseName;
+    });
+  }
+}
+customElements.define('mr-launch-overview', MrLaunchOverview);
diff --git a/static_src/elements/issue-detail/mr-launch-overview/mr-launch-overview.test.js b/static_src/elements/issue-detail/mr-launch-overview/mr-launch-overview.test.js
new file mode 100644
index 0000000..3e2ff46
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-launch-overview/mr-launch-overview.test.js
@@ -0,0 +1,24 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {MrLaunchOverview} from './mr-launch-overview.js';
+
+
+let element;
+
+describe('mr-launch-overview', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-launch-overview');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrLaunchOverview);
+  });
+});
diff --git a/static_src/elements/issue-detail/mr-launch-overview/mr-phase.js b/static_src/elements/issue-detail/mr-launch-overview/mr-phase.js
new file mode 100644
index 0000000..a81be65
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-launch-overview/mr-phase.js
@@ -0,0 +1,460 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+
+import 'elements/chops/chops-dialog/chops-dialog.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import '../mr-approval-card/mr-approval-card.js';
+import {valueForField, valuesForField} from 'shared/metadata-helpers.js';
+import 'elements/issue-detail/metadata/mr-edit-metadata/mr-edit-metadata.js';
+import 'elements/issue-detail/metadata/mr-metadata/mr-field-values.js';
+
+const TARGET_PHASE_MILESTONE_MAP = {
+  'Beta': 'feature_freeze',
+  'Stable-Exp': 'final_beta_cut',
+  'Stable': 'stable_cut',
+  'Stable-Full': 'stable_cut',
+};
+
+const APPROVED_PHASE_MILESTONE_MAP = {
+  'Beta': 'earliest_beta',
+  'Stable-Exp': 'final_beta',
+  'Stable': 'stable_date',
+  'Stable-Full': 'stable_date',
+};
+
+// The following milestones are unique to ios.
+const IOS_APPROVED_PHASE_MILESTONE_MAP = {
+  'Beta': 'earliest_beta_ios',
+};
+
+// See monorail:4692 and the use of PHASES_WITH_MILESTONES
+// in tracker/issueentry.py
+const PHASES_WITH_MILESTONES = ['Beta', 'Stable', 'Stable-Exp', 'Stable-Full'];
+
+/**
+ * `<mr-phase>`
+ *
+ * This is the component for a single phase.
+ *
+ */
+export class MrPhase extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    const isPhaseWithMilestone = PHASES_WITH_MILESTONES.includes(
+        this.phaseName);
+    const noApprovals = !this.approvals || !this.approvals.length;
+    return html`
+      <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+      <style>
+        mr-phase {
+          display: block;
+        }
+        mr-phase chops-dialog {
+          --chops-dialog-theme: {
+            width: 500px;
+            max-width: 100%;
+          };
+        }
+        mr-phase h2 {
+          margin: 0;
+          font-size: var(--chops-large-font-size);
+          font-weight: normal;
+          padding: 0.5em 8px;
+          box-sizing: border-box;
+          display: flex;
+          align-items: center;
+          flex-direction: row;
+          justify-content: space-between;
+        }
+        mr-phase h2 em {
+          margin-left: 16px;
+          font-size: var(--chops-main-font-size);
+        }
+        mr-phase .chip {
+          display: inline-block;
+          font-size: var(--chops-main-font-size);
+          padding: 0.25em 8px;
+          margin: 0 2px;
+          border-radius: 16px;
+          background: var(--chops-blue-gray-50);
+        }
+        .phase-edit {
+          padding: 0.1em 8px;
+        }
+      </style>
+      <h2>
+        <div>
+          Approvals<span ?hidden=${!this.phaseName || !this.phaseName.length}>:
+            ${this.phaseName}
+          </span>
+          ${isPhaseWithMilestone ? html`${this.fieldDefs &&
+              this.fieldDefs.map((field) => this._renderPhaseField(field))}
+            <em ?hidden=${!this._nextDate}>
+              ${this._dateDescriptor}
+              <chops-timestamp .timestamp=${this._nextDate}></chops-timestamp>
+            </em>
+            <em ?hidden=${!this._nextUniqueiOSDate}>
+              <b>iOS</b> ${this._dateDescriptor}
+              <chops-timestamp .timestamp=${this._nextUniqueiOSDate}
+              ></chops-timestamp>
+            </em>
+          `: ''}
+        </div>
+        ${isPhaseWithMilestone ? html`
+          <chops-button @click=${this.edit} class="de-emphasized phase-edit">
+            <i class="material-icons" role="presentation">create</i>
+            Edit
+          </chops-button>
+        `: ''}
+      </h2>
+      ${this.approvals && this.approvals.map((approval) => html`
+        <mr-approval-card
+          .approvers=${approval.approverRefs}
+          .setter=${approval.setterRef}
+          .fieldName=${approval.fieldRef.fieldName}
+          .phaseName=${this.phaseName}
+          .statusEnum=${approval.status}
+          .survey=${approval.survey}
+          .surveyTemplate=${approval.surveyTemplate}
+          .urls=${approval.urls}
+          .labels=${approval.labels}
+          .users=${approval.users}
+        ></mr-approval-card>
+      `)}
+      ${noApprovals ? html`No tasks for this phase.` : ''}
+      <!-- TODO(ehmaldonado): Move to /issue-detail/dialogs -->
+      <chops-dialog id="editPhase" aria-labelledby="phaseDialogTitle">
+        <h3 id="phaseDialogTitle" class="medium-heading">
+          Editing phase: ${this.phaseName}
+        </h3>
+        <mr-edit-metadata
+          id="metadataForm"
+          class="edit-actions-right"
+          .formName=${this.phaseName}
+          .fieldDefs=${this.fieldDefs}
+          .phaseName=${this.phaseName}
+          ?disabled=${this._updatingIssue}
+          .error=${this._updateIssueError && this._updateIssueError.description}
+          @save=${this.save}
+          @discard=${this.cancel}
+          isApproval
+          disableAttachments
+        ></mr-edit-metadata>
+      </chops-dialog>
+    `;
+  }
+
+  /**
+   *
+   * @param {FieldDef} field The field to be rendered.
+   * @return {TemplateResult}
+   * @private
+   */
+  _renderPhaseField(field) {
+    const values = valuesForField(this._fieldValueMap, field.fieldRef.fieldName,
+        this.phaseName);
+    return html`
+      <div class="chip">
+        ${field.fieldRef.fieldName}:
+        <mr-field-values
+          .name=${field.fieldRef.fieldName}
+          .type=${field.fieldRef.type}
+          .values=${values}
+          .projectName=${this.issueRef.projectName}
+        ></mr-field-values>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issue: {type: Object},
+      issueRef: {type: Object},
+      phaseName: {type: String},
+      approvals: {type: Array},
+      fieldDefs: {type: Array},
+
+      _updatingIssue: {type: Boolean},
+      _updateIssueError: {type: Object},
+      _fieldValueMap: {type: Object},
+      _milestoneData: {type: Object},
+      _isFetchingMilestone: {type: Boolean},
+      _fetchedMilestone: {type: String},
+    };
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.issue = {};
+    this.issueRef = {};
+    this.phaseName = '';
+    this.approvals = [];
+    this.fieldDefs = [];
+
+    this._updatingIssue = false;
+    this._updateIssueError = undefined;
+
+    // A response Object from
+    // https://chromiumdash.appspot.com/fetch_milestone_schedule?mstone=xx
+    this._milestoneData = {};
+    this._isFetchingMilestone = false;
+    this._fetchedMilestone = undefined;
+    /**
+     * @type {Promise} Used for testing to allow waiting for milestone
+     *   fetch operations to finish.
+     */
+    this._fetchMilestoneComplete = undefined;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.issue = issueV0.viewedIssue(state);
+    this.issueRef = issueV0.viewedIssueRef(state);
+    this.fieldDefs = projectV0.fieldDefsForPhases(state);
+    this._updatingIssue = issueV0.requests(state).update.requesting;
+    this._updateIssueError = issueV0.requests(state).update.error;
+    this._fieldValueMap = issueV0.fieldValueMap(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('issue')) {
+      this.reset();
+    }
+    if (changedProperties.has('_updatingIssue')) {
+      if (!this._updatingIssue && !this._updateIssueError) {
+        // Close phase edit modal only after a request finishes without errors.
+        this.cancel();
+      }
+    }
+
+    if (!this._isFetchingMilestone) {
+      const milestoneToFetch = this._milestoneToFetch;
+      if (milestoneToFetch && this._fetchedMilestone !== milestoneToFetch) {
+        this._fetchMilestoneComplete = this.fetchMilestoneData(
+            milestoneToFetch);
+      }
+    }
+  }
+
+  /**
+   * Makes an XHR request to Chromium Dash to find Chrome-specific launch data.
+   * eg. when certain Chrome milestones are planned for release.
+   * @param {string} milestone A string containing a Chrome milestone number.
+   * @return {Promise<void>}
+   */
+  async fetchMilestoneData(milestone) {
+    this._isFetchingMilestone = true;
+
+    try {
+      const resp = await window.fetch(
+          `https://chromiumdash.appspot.com/fetch_milestone_schedule?mstone=${
+            milestone}`);
+      this._milestoneData = await resp.json();
+    } catch (error) {
+      console.error(`Error when fetching milestone data: ${error}`);
+    }
+    this._fetchedMilestone = milestone;
+    this._isFetchingMilestone = false;
+  }
+
+  /**
+   * Opens the phase editing dialog when the user clicks the edit button.
+   */
+  edit() {
+    this.reset();
+    this.querySelector('#editPhase').open();
+  }
+
+  /**
+   * Stops editing the phase.
+   */
+  cancel() {
+    this.querySelector('#editPhase').close();
+    this.reset();
+  }
+
+  /**
+   * Resets the edit form to its default values.
+   */
+  reset() {
+    const form = this.querySelector('#metadataForm');
+    form.reset();
+  }
+
+  /**
+   * Saves the changes the user has made.
+   */
+  save() {
+    const form = this.querySelector('#metadataForm');
+    const delta = form.delta;
+
+    if (delta.fieldValsAdd) {
+      delta.fieldValsAdd = delta.fieldValsAdd.map(
+          (fv) => Object.assign({phaseRef: {phaseName: this.phaseName}}, fv));
+    }
+    if (delta.fieldValsRemove) {
+      delta.fieldValsRemove = delta.fieldValsRemove.map(
+          (fv) => Object.assign({phaseRef: {phaseName: this.phaseName}}, fv));
+    }
+
+    const message = {
+      issueRef: this.issueRef,
+      delta: delta,
+      sendEmail: form.sendEmail,
+      commentContent: form.getCommentContent(),
+    };
+
+    if (message.commentContent || message.delta) {
+      store.dispatch(issueV0.update(message));
+    }
+  }
+
+  /**
+   * Shows the next relevant Chrome Milestone date for this phase. Depending
+   * on the M-Target, M-Approved, or M-Launched values, this date means
+   * different things.
+   * @return {number} Unix timestamp in seconds.
+   * @private
+   */
+  get _nextDate() {
+    const phaseName = this.phaseName;
+    const status = this._status;
+    let data = this._milestoneData && this._milestoneData.mstones;
+    // Data pulled from https://chromiumdash.appspot.com/fetch_milestone_schedule?mstone=xx
+    if (!phaseName || !status || !data || !data.length) return 0;
+    data = data[0];
+
+    let key = TARGET_PHASE_MILESTONE_MAP[phaseName];
+    if (['Approved', 'Launched'].includes(status)) {
+      const osValues = this._fieldValueMap.get('OS');
+      // If iOS is the only OS and the phase is one where iOS has unique
+      // milestones, the only date we show should be this._nextUniqueiOSDate.
+      if (osValues && osValues.every((os) => {
+        return os === 'iOS';
+      }) && phaseName in IOS_APPROVED_PHASE_MILESTONE_MAP) {
+        return 0;
+      }
+      key = APPROVED_PHASE_MILESTONE_MAP[phaseName];
+    }
+    if (!key || !(key in data)) return 0;
+    return Math.floor((new Date(data[key])).getTime() / 1000);
+  }
+
+  /**
+   * For issues where iOS is the OS, this function finds the relevant iOS
+   * launch date.
+   * @return {number} Unix timestamp in seconds.
+   * @private
+   */
+  get _nextUniqueiOSDate() {
+    const phaseName = this.phaseName;
+    const status = this._status;
+    let data = this._milestoneData && this._milestoneData.mstones;
+    // Data pull from https://chromiumdash.appspot.com/fetch_milestone_schedule?mstone=xx
+    if (!phaseName || !status || !data || !data.length) return 0;
+    data = data[0];
+
+    const osValues = this._fieldValueMap.get('OS');
+    if (['Approved', 'Launched'].includes(status) &&
+        osValues && osValues.includes('iOS')) {
+      const key = IOS_APPROVED_PHASE_MILESTONE_MAP[phaseName];
+      if (key) {
+        return Math.floor((new Date(data[key])).getTime() / 1000);
+      }
+    }
+    return 0;
+  }
+
+  /**
+   * Depending on what kind of date we're showing, we want to include
+   * different text to describe the date.
+   * @return {string}
+   * @private
+   */
+  get _dateDescriptor() {
+    const status = this._status;
+    if (status === 'Approved') {
+      return 'Launching on ';
+    } else if (status === 'Launched') {
+      return 'Launched on ';
+    }
+    return 'Due by ';
+  }
+
+  /**
+   * The Chrome-specific status of a gate, computed from M-Approved,
+   * M-Launched, and M-Target fields.
+   * @return {string}
+   * @private
+   */
+  get _status() {
+    const target = this._targetMilestone;
+    const approved = this._approvedMilestone;
+    const launched = this._launchedMilestone;
+    if (approved >= target) {
+      if (launched >= approved) {
+        return 'Launched';
+      }
+      return 'Approved';
+    }
+    return 'Target';
+  }
+
+  /**
+   * The Chrome Milestone that this phase was approved for.
+   * @return {string}
+   * @private
+   */
+  get _approvedMilestone() {
+    return valueForField(this._fieldValueMap, 'M-Approved', this.phaseName);
+  }
+
+  /**
+   * The Chrome Milestone that this phase was launched on.
+   * @return {string}
+   * @private
+   */
+  get _launchedMilestone() {
+    return valueForField(this._fieldValueMap, 'M-Launched', this.phaseName);
+  }
+
+  /**
+   * The Chrome Milestone that this phase is targeting.
+   * @return {string}
+   * @private
+   */
+  get _targetMilestone() {
+    return valueForField(this._fieldValueMap, 'M-Target', this.phaseName);
+  }
+
+  /**
+   * The Chrome Milestone that's used to decide what date to show the user.
+   * @return {string}
+   * @private
+   */
+  get _milestoneToFetch() {
+    const target = Number.parseInt(this._targetMilestone) || 0;
+    const approved = Number.parseInt(this._approvedMilestone) || 0;
+    const launched = Number.parseInt(this._launchedMilestone) || 0;
+
+    const latestMilestone = Math.max(target, approved, launched);
+    return latestMilestone > 0 ? `${latestMilestone}` : '';
+  }
+}
+
+
+customElements.define('mr-phase', MrPhase);
diff --git a/static_src/elements/issue-detail/mr-launch-overview/mr-phase.test.js b/static_src/elements/issue-detail/mr-launch-overview/mr-phase.test.js
new file mode 100644
index 0000000..d55897e
--- /dev/null
+++ b/static_src/elements/issue-detail/mr-launch-overview/mr-phase.test.js
@@ -0,0 +1,209 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import {MrPhase} from './mr-phase.js';
+
+
+let element;
+
+describe('mr-phase', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-phase');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrPhase);
+  });
+
+  it('clicking edit button opens edit dialog', async () => {
+    element.phaseName = 'Beta';
+
+    await element.updateComplete;
+
+    const editDialog = element.querySelector('#editPhase');
+    assert.isFalse(editDialog.opened);
+
+    element.querySelector('.phase-edit').click();
+
+    await element.updateComplete;
+
+    assert.isTrue(editDialog.opened);
+  });
+
+  it('discarding form changes closes dialog', async () => {
+    await element.updateComplete;
+
+    // Open the edit dialog.
+    element.edit();
+    const editDialog = element.querySelector('#editPhase');
+    const editForm = element.querySelector('#metadataForm');
+
+    await element.updateComplete;
+
+    assert.isTrue(editDialog.opened);
+    editForm.discard();
+
+    await element.updateComplete;
+
+    assert.isFalse(editDialog.opened);
+  });
+
+  describe('milestone fetching', () => {
+    beforeEach(() => {
+      sinon.stub(element, 'fetchMilestoneData');
+    });
+
+    it('_launchedMilestone extracts M-Launched for phase', () => {
+      element._fieldValueMap = new Map([['m-launched beta', ['87']]]);
+      element.phaseName = 'Beta';
+
+      assert.equal(element._launchedMilestone, '87');
+      assert.equal(element._approvedMilestone, undefined);
+      assert.equal(element._targetMilestone, undefined);
+    });
+
+    it('_approvedMilestone extracts M-Approved for phase', () => {
+      element._fieldValueMap = new Map([['m-approved beta', ['86']]]);
+      element.phaseName = 'Beta';
+
+      assert.equal(element._launchedMilestone, undefined);
+      assert.equal(element._approvedMilestone, '86');
+      assert.equal(element._targetMilestone, undefined);
+    });
+
+    it('_targetMilestone extracts M-Target for phase', () => {
+      element._fieldValueMap = new Map([['m-target beta', ['85']]]);
+      element.phaseName = 'Beta';
+
+      assert.equal(element._launchedMilestone, undefined);
+      assert.equal(element._approvedMilestone, undefined);
+      assert.equal(element._targetMilestone, '85');
+    });
+
+    it('_milestoneToFetch returns empty when no relevant milestone', () => {
+      element._fieldValueMap = new Map([['m-target beta', ['85']]]);
+      element.phaseName = 'Stable';
+
+      assert.equal(element._milestoneToFetch, '');
+    });
+
+    it('_milestoneToFetch selects highest milestone', () => {
+      element._fieldValueMap = new Map([
+        ['m-target beta', ['84']],
+        ['m-approved beta', ['85']],
+        ['m-launched beta', ['86']]]);
+      element.phaseName = 'Beta';
+
+      assert.equal(element._milestoneToFetch, '86');
+    });
+
+    it('does not fetch when no milestones specified', async () => {
+      element.issue = {projectName: 'chromium', localId: 12};
+
+      await element.updateComplete;
+
+      sinon.assert.notCalled(element.fetchMilestoneData);
+    });
+
+    it('does not fetch when milestone to fetch is unchanged', async () => {
+      element._fetchedMilestone = '86';
+      element._fieldValueMap = new Map([['m-target beta', ['86']]]);
+      element.phaseName = 'Beta';
+
+      await element.updateComplete;
+
+      sinon.assert.notCalled(element.fetchMilestoneData);
+    });
+
+    it('fetches when milestone found', async () => {
+      element._fetchedMilestone = undefined;
+      element._fieldValueMap = new Map([['m-target beta', ['86']]]);
+      element.phaseName = 'Beta';
+
+      await element.updateComplete;
+
+      sinon.assert.calledWith(element.fetchMilestoneData, '86');
+    });
+
+    it('re-fetches when new milestone found', async () => {
+      element._fetchedMilestone = '86';
+      element._fieldValueMap = new Map([
+        ['m-target beta', ['86']],
+        ['m-launched beta', ['87']]]);
+      element.phaseName = 'Beta';
+
+      await element.updateComplete;
+
+      sinon.assert.calledWith(element.fetchMilestoneData, '87');
+    });
+
+    it('re-fetches only after last stale fetch finishes', async () => {
+      element._fetchedMilestone = '84';
+      element._fieldValueMap = new Map([['m-target beta', ['86']]]);
+      element.phaseName = 'Beta';
+      element._isFetchingMilestone = true;
+
+      await element.updateComplete;
+
+      sinon.assert.notCalled(element.fetchMilestoneData);
+
+      // Previous in flight fetch finishes.
+      element._fetchedMilestone = '85';
+      element._isFetchingMilestone = false;
+
+      await element.updateComplete;
+
+      sinon.assert.calledWith(element.fetchMilestoneData, '86');
+    });
+  });
+
+  describe('milestone fetching with fake server responses', () => {
+    beforeEach(() => {
+      sinon.stub(window, 'fetch');
+      sinon.spy(element, 'fetchMilestoneData');
+    });
+
+    afterEach(() => {
+      window.fetch.restore();
+    });
+
+    it('does not refetch when server response finishes', async () => {
+      const response = new window.Response('{"mstones": [{"mstone": 86}]}', {
+        status: 200,
+        headers: {
+          'Content-type': 'application/json',
+        },
+      });
+
+      window.fetch.returns(Promise.resolve(response));
+
+      element._fieldValueMap = new Map([['m-target beta', ['86']]]);
+      element.phaseName = 'Beta';
+
+      await element.updateComplete;
+
+      sinon.assert.calledWith(element.fetchMilestoneData, '86');
+
+      assert.isTrue(element._isFetchingMilestone);
+
+      await element._fetchMilestoneComplete;
+
+      assert.deepEqual(element._milestoneData, {'mstones': [{'mstone': 86}]});
+      assert.equal(element._fetchedMilestone, '86');
+      assert.isFalse(element._isFetchingMilestone);
+
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(element.fetchMilestoneData);
+    });
+  });
+});
diff --git a/static_src/elements/issue-entry/mr-issue-entry-page.js b/static_src/elements/issue-entry/mr-issue-entry-page.js
new file mode 100644
index 0000000..b1cc2ef
--- /dev/null
+++ b/static_src/elements/issue-entry/mr-issue-entry-page.js
@@ -0,0 +1,56 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import page from 'page';
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<mr-issue-entry-page>`
+ *
+ * This is the main details section for a given issue.
+ *
+ */
+export class MrIssueEntryPage extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        margin: 0;
+      }
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      userDisplayName: {type: String},
+      loginUrl: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    /* dependency injection for testing purpose */
+    this._page = page;
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+    if (!this.userDisplayName) {
+      this._page(this.loginUrl);
+    }
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <div>SPA issue entry page place holder</div>
+    `;
+  }
+}
+
+customElements.define('mr-issue-entry-page', MrIssueEntryPage);
diff --git a/static_src/elements/issue-entry/mr-issue-entry-page.test.js b/static_src/elements/issue-entry/mr-issue-entry-page.test.js
new file mode 100644
index 0000000..013a3a4
--- /dev/null
+++ b/static_src/elements/issue-entry/mr-issue-entry-page.test.js
@@ -0,0 +1,58 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrIssueEntryPage} from './mr-issue-entry-page.js';
+
+let element;
+
+describe('mr-issue-entry-page', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-issue-entry-page');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrIssueEntryPage);
+  });
+
+  describe('requires user to be logged in', () => {
+    it('redirects to loginUrl if not logged in', async () => {
+      document.body.removeChild(element);
+      element = document.createElement('mr-issue-entry-page');
+      assert.isUndefined(element.userDisplayName);
+
+      const EXPECTED = 'abc';
+      element.loginUrl = EXPECTED;
+
+      const pageStub = sinon.stub(element, '_page');
+      document.body.appendChild(element);
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(pageStub);
+      sinon.assert.calledWith(pageStub, EXPECTED);
+    });
+
+    it('renders when user is logged in', async () => {
+      document.body.removeChild(element);
+      element = document.createElement('mr-issue-entry-page');
+
+      element.loginUrl = 'abc';
+      element.userDisplayName = 'not_undefined';
+
+      const pageStub = sinon.stub(element, '_page');
+      const renderSpy = sinon.spy(element, 'render');
+      document.body.appendChild(element);
+      await element.updateComplete;
+
+      sinon.assert.notCalled(pageStub);
+      sinon.assert.calledOnce(renderSpy);
+    });
+  });
+});
diff --git a/static_src/elements/issue-list/mr-chart-page/mr-chart-page.js b/static_src/elements/issue-list/mr-chart-page/mr-chart-page.js
new file mode 100644
index 0000000..06ff7a4
--- /dev/null
+++ b/static_src/elements/issue-list/mr-chart-page/mr-chart-page.js
@@ -0,0 +1,100 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {connectStore} from 'reducers/base.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import '../mr-mode-selector/mr-mode-selector.js';
+import '../mr-chart/mr-chart.js';
+
+/**
+ * <mr-chart-page>
+ *
+ * Chart page view containing mr-mode-selector and mr-chart.
+ * @extends {LitElement}
+ */
+export class MrChartPage extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+        box-sizing: border-box;
+        width: 100%;
+        padding: 0.5em 8px;
+      }
+      h2 {
+        font-size: 1.2em;
+        margin: 0 0 0.5em;
+      }
+      .list-controls {
+        display: flex;
+        align-items: center;
+        justify-content: flex-end;
+        width: 100%;
+        padding: 0.5em 0;
+        height: 32px;
+      }
+      .help {
+        padding: 1em;
+        background-color: rgb(227, 242, 253);
+        width: 44em;
+        font-size: 92%;
+        margin: 5px;
+        padding: 6px;
+        border-radius: 6px;
+      }
+      .monospace {
+        font-family: monospace;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <div class="list-controls">
+        <mr-mode-selector
+          .projectName=${this._projectName}
+          .queryParams=${this._queryParams}
+          .value=${'chart'}
+        ></mr-mode-selector>
+      </div>
+      <mr-chart
+        .projectName=${this._projectName}
+        .queryParams=${this._queryParams}
+      ></mr-chart>
+
+      <div>
+        <div class="help">
+          <h2>Supported query parameters:</h2>
+          <span class="monospace">
+            cc, component, hotlist, label, owner, reporter, status
+          </span>
+          <br /><br />
+          <a href="https://bugs.chromium.org/p/monorail/issues/entry?labels=Feature-Charts">
+            Please file feedback here.
+          </a>
+        </div>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      _projectName: {type: String},
+      /** @private {Object} */
+      _queryParams: {type: Object},
+    };
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._projectName = projectV0.viewedProjectName(state);
+    this._queryParams = sitewide.queryParams(state);
+  }
+};
+customElements.define('mr-chart-page', MrChartPage);
diff --git a/static_src/elements/issue-list/mr-chart/chops-chart.js b/static_src/elements/issue-list/mr-chart/chops-chart.js
new file mode 100644
index 0000000..a74255a
--- /dev/null
+++ b/static_src/elements/issue-list/mr-chart/chops-chart.js
@@ -0,0 +1,94 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+
+/**
+ * `<chops-chart>`
+ *
+ * Web components wrapper around Chart.js.
+ *
+ */
+export class ChopsChart extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+      }
+    `;
+  }
+
+  /** @override */
+  render() {
+    return html`
+      <canvas></canvas>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      type: {type: String},
+      data: {type: Object},
+      options: {type: Object},
+      _chart: {type: Object},
+      _chartConstructor: {type: Object},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.type = 'line';
+    this.data = {};
+    this.options = {};
+  }
+
+  /**
+   * Dynamically chartJs to reduce single EZT bundle size
+   * Move to static import once EZT is deprecated
+   */
+  async connectedCallback() {
+    super.connectedCallback();
+    /* eslint-disable max-len */
+    const {default: Chart} = await import(
+        /* webpackChunkName: "chartjs" */ 'chart.js/dist/Chart.bundle.min.js');
+    this._chartConstructor = Chart;
+  }
+
+  /**
+   * Refetch and rerender chart after property changes
+   * @override
+   * @param {Map} changedProperties
+   */
+  updated(changedProperties) {
+    // Make sure chartJS has loaded before attempting to create a chart
+    if (this._chartConstructor) {
+      if (!this._chart) {
+        const {type, data, options} = this;
+        const ctx = this.shadowRoot.querySelector('canvas').getContext('2d');
+        this._chart = new this._chartConstructor(ctx, {type, data, options});
+      } else if (
+        changedProperties.has('type') ||
+        changedProperties.has('data') ||
+        changedProperties.has('options')) {
+        this._updateChart();
+      }
+    }
+  }
+
+  /**
+   * Sets chartJs options and calls update
+   */
+  _updateChart() {
+    this._chart.type = this.type;
+    this._chart.data = this.data;
+    this._chart.options = this.options;
+
+    this._chart.update();
+  }
+}
+
+customElements.define('chops-chart', ChopsChart);
diff --git a/static_src/elements/issue-list/mr-chart/chops-chart.test.js b/static_src/elements/issue-list/mr-chart/chops-chart.test.js
new file mode 100644
index 0000000..bf05012
--- /dev/null
+++ b/static_src/elements/issue-list/mr-chart/chops-chart.test.js
@@ -0,0 +1,24 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {ChopsChart} from './chops-chart.js';
+
+
+let element;
+
+describe('chops-chart', () => {
+  beforeEach(() => {
+    element = document.createElement('chops-chart');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, ChopsChart);
+  });
+});
diff --git a/static_src/elements/issue-list/mr-chart/mr-chart.js b/static_src/elements/issue-list/mr-chart/mr-chart.js
new file mode 100644
index 0000000..a4c4189
--- /dev/null
+++ b/static_src/elements/issue-list/mr-chart/mr-chart.js
@@ -0,0 +1,1041 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import qs from 'qs';
+import page from 'page';
+
+import {prpcClient} from 'prpc-client-instance.js';
+import {linearRegression} from 'shared/math.js';
+import './chops-chart.js';
+import {urlWithNewParams, createObjectComparisonFunc} from 'shared/helpers.js';
+
+const DEFAULT_NUM_DAYS = 90;
+const SECONDS_IN_DAY = 24 * 60 * 60;
+const MAX_QUERY_SIZE = 90;
+const MAX_DISPLAY_LINES = 10;
+const predRangeType = Object.freeze({
+  NEXT_MONTH: 0,
+  NEXT_QUARTER: 1,
+  NEXT_50: 2,
+  HIDE: 3,
+});
+const CHART_OPTIONS = {
+  animation: false,
+  responsive: true,
+  title: {
+    display: true,
+    text: 'Issues over time',
+  },
+  tooltips: {
+    mode: 'x',
+    intersect: false,
+  },
+  hover: {
+    mode: 'x',
+    intersect: false,
+  },
+  legend: {
+    display: true,
+    labels: {
+      boxWidth: 15,
+    },
+  },
+  scales: {
+    xAxes: [{
+      display: true,
+      type: 'time',
+      time: {parser: 'MM/DD/YYYY', tooltipFormat: 'll'},
+      scaleLabel: {
+        display: true,
+        labelString: 'Day',
+      },
+    }],
+    yAxes: [{
+      display: true,
+      ticks: {
+        beginAtZero: true,
+      },
+      scaleLabel: {
+        display: true,
+        labelString: 'Value',
+      },
+    }],
+  },
+};
+const COLOR_CHOICES = ['#00838F', '#B71C1C', '#2E7D32', '#00659C',
+  '#5D4037', '#558B2F', '#FF6F00', '#6A1B9A', '#880E4F', '#827717'];
+const BG_COLOR_CHOICES = ['#B2EBF2', '#EF9A9A', '#C8E6C9', '#B2DFDB',
+  '#D7CCC8', '#DCEDC8', '#FFECB3', '#E1BEE7', '#F8BBD0', '#E6EE9C'];
+
+/**
+ * Set of serialized state this element should update for.
+ * mr-app lowercases all query parameters before putting into store.
+ * @type {Set<string>}
+ */
+export const subscribedQuery = new Set([
+  'start-date',
+  'end-date',
+  'groupby',
+  'labelprefix',
+  'q',
+  'can',
+]);
+
+const queryParamsHaveChanged = createObjectComparisonFunc(subscribedQuery);
+
+/**
+ * Mapping between query param's groupby value and chart application data.
+ * @type {Object}
+ */
+const groupByMapping = {
+  'open': {display: 'Is open', value: 'open'},
+  'owner': {display: 'Owner', value: 'owner'},
+  'comonent': {display: 'Component', value: 'component'},
+  'status': {display: 'Status', value: 'status'},
+};
+
+/**
+ * `<mr-chart>`
+ *
+ * Component rendering the chart view
+ *
+ */
+export default class MrChart extends LitElement {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+        max-width: 800px;
+        margin: 0 auto;
+      }
+      chops-chart {
+        max-width: 100%;
+      }
+      div#options {
+        max-width: 720px;
+        margin: 2em auto;
+        text-align: center;
+      }
+      div#options #unsupported-fields {
+        font-weight: bold;
+        color: orange;
+      }
+      div.align {
+        display: flex;
+      }
+      div.align #frequency, div.align #groupBy {
+        display: inline-block;
+        width: 40%;
+      }
+      div.align #frequency #two-toggle {
+        font-size: 95%;
+        text-align: center;
+        margin-bottom: 5px;
+      }
+      div.align #time, div.align #prediction {
+        display: inline-block;
+        width: 60%;
+      }
+      #dropdown {
+        height: 50%;
+      }
+      div.section {
+        display: inline-block;
+        text-align: center;
+      }
+      div.section.input {
+        padding: 4px 10px;
+      }
+      .menu {
+        min-width: 50%;
+        text-align: left;
+        font-size: 12px;
+        box-sizing: border-box;
+        text-decoration: none;
+        white-space: nowrap;
+        padding: 0.25em 8px;
+        transition: 0.2s background ease-in-out;
+        cursor: pointer;
+        color: var(--chops-link-color);
+      }
+      .menu:hover {
+        background: hsl(0, 0%, 90%);
+      }
+      .choice.transparent {
+        background: var(--chops-white);
+        border-color: var(--chops-choice-color);
+        border-radius: 4px;
+      }
+      .choice.shown {
+        background: var(--chops-active-choice-bg);
+      }
+      .choice {
+        padding: 4px 10px;
+        background: var(--chops-choice-bg);
+        color: var(--chops-choice-color);
+        text-decoration: none;
+        display: inline-block;
+      }
+      .choice.checked {
+        background: var(--chops-active-choice-bg);
+      }
+      p .warning-message {
+        display: none;
+        font-size: 1.25em;
+        padding: 0.25em;
+        background-color: var(--chops-orange-50);
+      }
+      progress {
+        background-color: var(--chops-white);
+        border: 1px solid var(--chops-gray-500);
+        margin: 0 0 1em;
+        width: 100%;
+        visibility: visible;
+      }
+      ::-webkit-progress-bar {
+        background-color: var(--chops-white);
+      }
+      progress::-webkit-progress-value {
+        transition: width 1s;
+        background-color: #00838F;
+      }
+    `;
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('queryParams')) {
+      this._setPropsFromQueryParams();
+      this._fetchData();
+    }
+  }
+
+  /** @override */
+  render() {
+    const doneLoading = this.progress === 1;
+    return html`
+      <chops-chart
+        type="line"
+        .options=${CHART_OPTIONS}
+        .data=${this._chartData(this.indices, this.values)}
+      ></chops-chart>
+      <div id="options">
+        <p id="unsupported-fields">
+          ${this.unsupportedFields.length ? `
+            Unsupported fields: ${this.unsupportedFields.join(', ')}`: ''}
+        </p>
+        <progress
+          value=${this.progress}
+          ?hidden=${doneLoading}
+        >Loading chart...</progress>
+        <p class="warning-message" ?hidden=${!this.searchLimitReached}>
+          Note: Some results are not being counted.
+          Please narrow your query.
+        </p>
+        <p class="warning-message" ?hidden=${!this.maxQuerySizeReached}>
+          Your query is too long.
+          Showing ${MAX_QUERY_SIZE} weeks from end date.
+        </p>
+        <p class="warning-message" ?hidden=${!this.dateRangeNotLegal}>
+          Your requested date range does not exist.
+          Showing ${MAX_QUERY_SIZE} days from end date.
+        </p>
+        <p class="warning-message" ?hidden=${!this.cannedQueryOpen}>
+          Your query scope prevents closed issues from showing.
+        </p>
+        <div class="align">
+          <div id="frequency">
+            <label for="two-toggle">Choose date range:</label>
+            <div id="two-toggle">
+              <chops-button @click="${this._setDateRange.bind(this, 180)}"
+                class="${this.dateRange === 180 ? 'choice checked': 'choice'}">
+                180 Days
+              </chops-button>
+              <chops-button @click="${this._setDateRange.bind(this, 90)}"
+                class="${this.dateRange === 90 ? 'choice checked': 'choice'}">
+                90 Days
+              </chops-button>
+              <chops-button @click="${this._setDateRange.bind(this, 30)}"
+                class="${this.dateRange === 30 ? 'choice checked': 'choice'}">
+                30 Days
+              </chops-button>
+            </div>
+          </div>
+          <div id="time">
+            <label for="start-date">Choose start and end date:</label>
+            <br />
+            <input
+              type="date"
+              id="start-date"
+              name="start-date"
+              .value=${this.startDate && this.startDate.toISOString().substr(0, 10)}
+              ?disabled=${!doneLoading}
+              @change=${(e) => this.startDate = MrChart.dateStringToDate(e.target.value)}
+            />
+            <input
+              type="date"
+              id="end-date"
+              name="end-date"
+              .value=${this.endDate && this.endDate.toISOString().substr(0, 10)}
+              ?disabled=${!doneLoading}
+              @change=${(e) => this.endDate = MrChart.dateStringToDate(e.target.value)}
+            />
+            <chops-button @click="${this._onDateChanged}" class=choice>
+              Apply
+            </chops-button>
+          </div>
+        </div>
+        <div class="align">
+          <div id="prediction">
+          <label for="two-toggle">Choose prediction range:</label>
+          <div id="two-toggle">
+            ${this._renderPredictChoice('Future Month', predRangeType.NEXT_MONTH)}
+            ${this._renderPredictChoice('Future Quarter', predRangeType.NEXT_QUARTER)}
+            ${this._renderPredictChoice('Future 50%', predRangeType.NEXT_50)}
+            ${this._renderPredictChoice('Hide', predRangeType.HIDE)}
+          </div>
+        </div>
+          <div id="groupBy">
+            <label for="dropdown">Choose group by:</label>
+            <mr-dropdown
+              id="dropdown"
+              ?disabled=${!doneLoading}
+              .text=${this.groupBy.display}
+            >
+              ${this.dropdownHTML}
+            </mr-dropdown>
+          </div>
+        </div>
+      </div>
+    `;
+  }
+
+  /**
+   * Renders a single prediction button.
+   * @param {string} choiceName The text displayed on the button.
+   * @param {number} rangeType An enum-like number specifying which range
+   *   to use.
+   * @return {TemplateResult}
+   */
+  _renderPredictChoice(choiceName, rangeType) {
+    const changePrediction = (_e) => {
+      this.predRange = rangeType;
+      this._fetchData();
+    };
+    return html`
+      <chops-button
+        @click=${changePrediction}
+        class="${this.predRange === rangeType ? 'checked': ''} choice">
+        ${choiceName}
+      </chops-button>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      progress: {type: Number},
+      projectName: {type: String},
+      hotlistId: {type: Number},
+      indices: {type: Array},
+      values: {type: Array},
+      unsupportedFields: {type: Array},
+      dateRangeNotLegal: {type: Boolean},
+      dateRange: {type: Number},
+      frequency: {type: Number},
+      queryParams: {
+        type: Object,
+        hasChanged: queryParamsHaveChanged,
+      },
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.progress = 0.05;
+    this.values = [];
+    this.indices = [];
+    this.unsupportedFields = [];
+    this.predRange = predRangeType.HIDE;
+    this._page = page;
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    if (!this.projectName && !this.hotlistId) {
+      throw new Error('Attribute `projectName` or `hotlistId` required.');
+    }
+    this._setPropsFromQueryParams();
+    this._constructDropdownMenu();
+  }
+
+  /**
+   * Initialize queryParams and set properties from the queryParams.
+   * Since this page exists in both the SPA and ezt they initialize mr-chart
+   * differently, ie in ezt, this.queryParams will be undefined during
+   * connectedCallback. Until ezt is deleted, initialize props here.
+   */
+  _setPropsFromQueryParams() {
+    if (!this.queryParams) {
+      const params = qs.parse(document.location.search.substring(1));
+      // ezt pages used querystring as source of truth
+      // and 'labelPrefix'in query param, but SPA uses
+      // redux store's sitewide.queryParams as source of truth
+      // and lowercases all keys in sitewide.queryParams
+      if (params.hasOwnProperty('labelPrefix')) {
+        const labelPrefixValue = params['labelPrefix'];
+        params['labelprefix'] = labelPrefixValue;
+        delete params['labelPrefix'];
+      }
+      this.queryParams = params;
+    }
+    this.endDate = MrChart.getEndDate(this.queryParams['end-date']);
+    this.startDate = MrChart.getStartDate(
+        this.queryParams['start-date'],
+        this.endDate, DEFAULT_NUM_DAYS);
+    this.groupBy = MrChart.getGroupByFromQuery(this.queryParams);
+  }
+
+  /**
+   * Set dropdown options menu in HTML.
+   */
+  async _constructDropdownMenu() {
+    const response = await this._getLabelPrefixes();
+    let dropdownOptions = ['None', 'Component', 'Is open', 'Status', 'Owner'];
+    dropdownOptions = dropdownOptions.concat(response);
+    const dropdownHTML = dropdownOptions.map((str) => html`
+      <option class='menu' @click=${this._setGroupBy}>
+        ${str}</option>`);
+    this.dropdownHTML = html`${dropdownHTML}`;
+  }
+
+  /**
+   * Call global page.js to change frontend route based on new parameters
+   * @param {Object<string, string>} newParams
+   */
+  _changeUrlParams(newParams) {
+    const newUrl = urlWithNewParams(`/p/${this.projectName}/issues/list`,
+        this.queryParams, newParams);
+    this._page(newUrl);
+  }
+
+  /**
+   * Set start date and end date and trigger url action
+   */
+  _onDateChanged() {
+    const newParams = {
+      'start-date': this.startDate.toISOString().substr(0, 10),
+      'end-date': this.endDate.toISOString().substr(0, 10),
+    };
+    this._changeUrlParams(newParams);
+  }
+
+  /**
+   * Fetch data required to render chart
+   * @fires Event#allDataLoaded
+   */
+  async _fetchData() {
+    this.dateRange = Math.ceil(
+        (this.endDate - this.startDate) / (1000 * SECONDS_IN_DAY));
+
+    // Coordinate different params and flags, protect against illegal queries
+    // Case for start date greater than end date.
+    if (this.dateRange <= 0) {
+      this.frequency = 7;
+      this.dateRangeNotLegal = true;
+      this.maxQuerySizeReached = false;
+      this.dateRange = MAX_QUERY_SIZE;
+    } else {
+      this.dateRangeNotLegal = false;
+      if (this.dateRange >= MAX_QUERY_SIZE * 7) {
+        // Case for date range too long, requires >= MAX_QUERY_SIZE queries.
+        this.frequency = 7;
+        this.maxQuerySizeReached = true;
+        this.dateRange = MAX_QUERY_SIZE * 7;
+      } else {
+        this.maxQuerySizeReached = false;
+        if (this.dateRange < MAX_QUERY_SIZE) {
+          // Case for small date range, displayed in daily frequency.
+          this.frequency = 1;
+        } else {
+          // Case for medium date range, displayed in weekly frequency.
+          this.frequency = 7;
+        }
+      }
+    }
+    // Set canned query flag.
+    this.cannedQueryOpen = (this.queryParams.can === '2' &&
+      this.groupBy.value === 'open');
+
+    // Reset chart variables except indices.
+    this.progress = 0.05;
+
+    let numTimestampsLoaded = 0;
+    const timestampsChronological = MrChart.makeTimestamps(this.endDate,
+        this.frequency, this.dateRange);
+    const tsToIndexMap = new Map(timestampsChronological.map((ts, idx) => (
+      [ts, idx]
+    )));
+    this.indices = MrChart.makeIndices(timestampsChronological);
+    const timestamps = MrChart.sortInBisectOrder(timestampsChronological);
+    this.values = new Array(timestamps.length).fill(undefined);
+
+    const fetchPromises = timestamps.map(async (ts) => {
+      const data = await this._fetchDataAtTimestamp(ts);
+      const index = tsToIndexMap.get(ts);
+      this.values[index] = data.issues;
+      numTimestampsLoaded += 1;
+      const progressValue = numTimestampsLoaded / timestamps.length;
+      this.progress = progressValue;
+
+      return data;
+    });
+
+    const chartData = await Promise.all(fetchPromises);
+
+    // This is purely for testing purposes
+    this.dispatchEvent(new Event('allDataLoaded'));
+
+    // Check if the query includes any field values that are not supported.
+    const flatUnsupportedFields = chartData.reduce((acc, datum) => {
+      if (datum.unsupportedField) {
+        acc = acc.concat(datum.unsupportedField);
+      }
+      return acc;
+    }, []);
+    this.unsupportedFields = Array.from(new Set(flatUnsupportedFields));
+
+    this.searchLimitReached = chartData.some((d) => d.searchLimitReached);
+  }
+
+  /**
+   * fetch data at timestamp
+   * @param {number} timestamp
+   * @return {{date: number, issues: Array<Map.<string, number>>,
+   *   unsupportedField: string, searchLimitReached: string}}
+   */
+  async _fetchDataAtTimestamp(timestamp) {
+    const query = this.queryParams.q;
+    const cannedQuery = this.queryParams.can;
+    const message = {
+      timestamp: timestamp,
+      projectName: this.projectName,
+      query: query,
+      cannedQuery: cannedQuery,
+      hotlistId: this.hotlistId,
+      groupBy: undefined,
+    };
+    if (this.groupBy.value !== '') {
+      message['groupBy'] = this.groupBy.value;
+      if (this.groupBy.value === 'label') {
+        message['labelPrefix'] = this.groupBy.labelPrefix;
+      }
+    }
+    const response = await prpcClient.call('monorail.Issues',
+        'IssueSnapshot', message);
+
+    let issues;
+    if (response.snapshotCount) {
+      issues = response.snapshotCount.reduce((map, curr) => {
+        if (curr.dimension !== undefined) {
+          if (this.groupBy.value === '') {
+            map.set('Issue Count', curr.count);
+          } else {
+            map.set(curr.dimension, curr.count);
+          }
+        }
+        return map;
+      }, new Map());
+    } else {
+      issues = new Map();
+    }
+    return {
+      date: timestamp * 1000,
+      issues: issues,
+      unsupportedField: response.unsupportedField,
+      searchLimitReached: response.searchLimitReached,
+    };
+  }
+
+  /**
+   * Get prefixes from the set of labels.
+   */
+  async _getLabelPrefixes() {
+    // If no project (i.e. viewing a hotlist), return empty list.
+    if (!this.projectName) {
+      return [];
+    }
+
+    const projectRequestMessage = {
+      project_name: this.projectName};
+    const labelsResponse = await prpcClient.call(
+        'monorail.Projects', 'GetLabelOptions', projectRequestMessage);
+    const labelPrefixes = new Set();
+    for (let i = 0; i < labelsResponse.labelOptions.length; i++) {
+      const label = labelsResponse.labelOptions[i].label;
+      if (label.includes('-')) {
+        labelPrefixes.add(label.split('-')[0]);
+      }
+    }
+    return Array.from(labelPrefixes);
+  }
+
+  /**
+   * construct chart data
+   * @param {Array} indices
+   * @param {Array} values
+   * @return {Object} chart data and options
+   */
+  _chartData(indices, values) {
+    // Generate a map of each data line {dimension:string, value:array}
+    const mapValues = new Map();
+    for (let i = 0; i < values.length; i++) {
+      if (values[i] !== undefined) {
+        values[i].forEach((value, key, map) => mapValues.set(key, []));
+      }
+    }
+    // Count the number of 0 or undefined data points.
+    let count = 0;
+    for (let i = 0; i < values.length; i++) {
+      if (values[i] !== undefined) {
+        if (values[i].size === 0) {
+          count++;
+        }
+        // Set none-existing data points 0.
+        mapValues.forEach((value, key, map) => {
+          mapValues.set(key, value.concat([values[i].get(key) || 0]));
+        });
+      } else {
+        count++;
+      }
+    }
+    // Legend display set back to default.
+    CHART_OPTIONS.legend.display = true;
+    // Check if any positive valued data exist, if not, draw an array of zeros.
+    if (count === values.length) {
+      return {
+        type: 'line',
+        labels: indices,
+        datasets: [{
+          label: this.groupBy.labelPrefix,
+          data: Array(indices.length).fill(0),
+          backgroundColor: COLOR_CHOICES[0],
+          borderColor: COLOR_CHOICES[0],
+          showLine: true,
+          fill: false,
+        }],
+      };
+    }
+    // Convert map to a dataset of lines.
+    let arrayValues = [];
+    mapValues.forEach((value, key, map) => {
+      arrayValues.push({
+        label: key,
+        data: value,
+        backgroundColor: COLOR_CHOICES[arrayValues.length %
+          COLOR_CHOICES.length],
+        borderColor: COLOR_CHOICES[arrayValues.length % COLOR_CHOICES.length],
+        showLine: true,
+        fill: false,
+      });
+    });
+    arrayValues = MrChart.getSortedLines(arrayValues, MAX_DISPLAY_LINES);
+    if (this.predRange === predRangeType.HIDE) {
+      return {
+        type: 'line',
+        labels: indices,
+        datasets: arrayValues,
+      };
+    }
+
+    let predictedValues = [];
+    let originalData;
+    let predictedData;
+    let maxData;
+    let minData;
+    let currColor;
+    let currBGColor;
+    // Check if displayed values > MAX_DISPLAY_LINES, hide legend.
+    if (arrayValues.length * 4 > MAX_DISPLAY_LINES) {
+      CHART_OPTIONS.legend.display = false;
+    } else {
+      CHART_OPTIONS.legend.display = true;
+    }
+    for (let i = 0; i < arrayValues.length; i++) {
+      [originalData, predictedData, maxData, minData] =
+        MrChart.getAllData(indices, arrayValues[i]['data'], this.dateRange,
+            this.predRange, this.frequency, this.endDate);
+      currColor = COLOR_CHOICES[i % COLOR_CHOICES.length];
+      currBGColor = BG_COLOR_CHOICES[i % COLOR_CHOICES.length];
+      predictedValues = predictedValues.concat([{
+        label: arrayValues[i]['label'],
+        backgroundColor: currColor,
+        borderColor: currColor,
+        data: originalData,
+        showLine: true,
+        fill: false,
+      }, {
+        label: arrayValues[i]['label'].concat(' prediction'),
+        backgroundColor: currColor,
+        borderColor: currColor,
+        borderDash: [5, 5],
+        data: predictedData,
+        pointRadius: 0,
+        showLine: true,
+        fill: false,
+      }, {
+        label: arrayValues[i]['label'].concat(' lower error'),
+        backgroundColor: currBGColor,
+        borderColor: currBGColor,
+        borderDash: [5, 5],
+        data: minData,
+        pointRadius: 0,
+        showLine: true,
+        hidden: true,
+        fill: false,
+      }, {
+        label: arrayValues[i]['label'].concat(' upper error'),
+        backgroundColor: currBGColor,
+        borderColor: currBGColor,
+        borderDash: [5, 5],
+        data: maxData,
+        pointRadius: 0,
+        showLine: true,
+        hidden: true,
+        fill: '-1',
+      }]);
+    }
+    return {
+      type: 'scatter',
+      datasets: predictedValues,
+    };
+  }
+
+  /**
+   * Change group by based on dropdown menu selection.
+   * @param {Event} e
+   */
+  _setGroupBy(e) {
+    switch (e.target.text) {
+      case 'None':
+        this.groupBy = {value: undefined};
+        break;
+      case 'Is open':
+        this.groupBy = {value: 'open'};
+        break;
+      case 'Owner':
+      case 'Component':
+      case 'Status':
+        this.groupBy = {value: e.target.text.toLowerCase()};
+        break;
+      default:
+        this.groupBy = {value: 'label', labelPrefix: e.target.text};
+    }
+    this.groupBy['display'] = e.target.text;
+    this.shadowRoot.querySelector('#dropdown').text = e.target.text;
+    this.shadowRoot.querySelector('#dropdown').close();
+
+    const newParams = {
+      'groupby': this.groupBy.value,
+      'labelprefix': this.groupBy.labelPrefix,
+    };
+
+    this._changeUrlParams(newParams);
+  }
+
+  /**
+   * Change date range and frequency based on button clicked.
+   * @param {number} dateRange Number of days in date range
+   */
+  _setDateRange(dateRange) {
+    if (this.dateRange !== dateRange) {
+      this.startDate = new Date(
+          this.endDate.getTime() - 1000 * SECONDS_IN_DAY * dateRange);
+      this._onDateChanged();
+      window.getTSMonClient().recordDateRangeChange(dateRange);
+    }
+  }
+
+  /**
+   * Move first, last, and median to the beginning of the array, recursively.
+   * @param  {Array} timestamps
+   * @return {Array}
+   */
+  static sortInBisectOrder(timestamps) {
+    const arr = [];
+    if (timestamps.length === 0) {
+      return arr;
+    } else if (timestamps.length <= 2) {
+      return timestamps;
+    } else {
+      const beginTs = timestamps.shift();
+      const endTs = timestamps.pop();
+      const medianTs = timestamps.splice(timestamps.length / 2, 1)[0];
+      return [beginTs, endTs, medianTs].concat(
+          MrChart.sortInBisectOrder(timestamps));
+    }
+  }
+
+  /**
+   * Populate array of timestamps we want to fetch.
+   * @param {Date} endDate
+   * @param {number} frequency
+   * @param {number} numDays
+   * @return {Array}
+   */
+  static makeTimestamps(endDate, frequency, numDays=DEFAULT_NUM_DAYS) {
+    if (!endDate) {
+      throw new Error('endDate required');
+    }
+    const endTimeSeconds = Math.round(endDate.getTime() / 1000);
+    const timestampsChronological = [];
+    for (let i = 0; i < numDays; i += frequency) {
+      timestampsChronological.unshift(endTimeSeconds - (SECONDS_IN_DAY * i));
+    }
+    return timestampsChronological;
+  }
+
+  /**
+   * Convert a string '2018-11-03' to a Date object.
+   * @param  {string} dateString
+   * @return {Date}
+   */
+  static dateStringToDate(dateString) {
+    if (!dateString) {
+      return null;
+    }
+    const splitDate = dateString.split('-');
+    const year = Number.parseInt(splitDate[0]);
+    // Month is 0-indexed, so subtract one.
+    const month = Number.parseInt(splitDate[1]) - 1;
+    const day = Number.parseInt(splitDate[2]);
+    return new Date(Date.UTC(year, month, day, 23, 59, 59));
+  }
+
+  /**
+   * Returns a Date parsed from string input, defaults to current date.
+   * @param {string} input
+   * @return {Date}
+   */
+  static getEndDate(input) {
+    if (input) {
+      const date = MrChart.dateStringToDate(input);
+      if (date) {
+        return date;
+      }
+    }
+    const today = new Date();
+    today.setHours(23);
+    today.setMinutes(59);
+    today.setSeconds(59);
+    return today;
+  }
+
+  /**
+   * Return a Date parsed from string input
+   * defaults to diff days befores endDate
+   * @param {string} input
+   * @param {Date} endDate
+   * @param {number} diff
+   * @return {Date}
+   */
+  static getStartDate(input, endDate, diff) {
+    if (input) {
+      const date = MrChart.dateStringToDate(input);
+      if (date) {
+        return date;
+      }
+    }
+    return new Date(endDate.getTime() - 1000 * SECONDS_IN_DAY * diff);
+  }
+
+  /**
+   * Make indices
+   * @param {Array} timestamps
+   * @return {Array}
+   */
+  static makeIndices(timestamps) {
+    const dateFormat = {year: 'numeric', month: 'numeric', day: 'numeric'};
+    return timestamps.map((ts) => (
+      (new Date(ts * 1000)).toLocaleDateString('en-US', dateFormat)
+    ));
+  }
+
+  /**
+   * Generate predicted future data based on previous data.
+   * @param {Array} values
+   * @param {number} dateRange
+   * @param {number} interval
+   * @param {number} frequency
+   * @param {Date} inputEndDate
+   * @return {Array}
+   */
+  static getPredictedData(
+      values, dateRange, interval, frequency, inputEndDate) {
+    // TODO(weihanl): changes to support frequencies other than 1 and 7.
+    let n;
+    let endDateRange;
+    if (frequency === 1) {
+      // Display in daily.
+      n = values.length;
+      endDateRange = interval;
+    } else {
+      // Display in weekly.
+      n = Math.floor((DEFAULT_NUM_DAYS + 1) / 7);
+      endDateRange = interval * 7 - 1;
+    }
+    const [slope, intercept] = linearRegression(values, n);
+    const endDate = new Date(inputEndDate.getTime() +
+        1000 * SECONDS_IN_DAY * (1 + endDateRange));
+    const timestampsChronological = MrChart.makeTimestamps(
+        endDate, frequency, endDateRange);
+    const predictedIndices = MrChart.makeIndices(timestampsChronological);
+
+    // Obtain future data and past data on the generated line.
+    const predictedValues = [];
+    const generatedValues = [];
+    for (let i = 0; i < interval; i++) {
+      predictedValues.push(Math.round(100*((i + n) * slope + intercept)) / 100);
+    }
+    for (let i = 0; i < n; i++) {
+      generatedValues.push(Math.round(100*(i * slope + intercept)) / 100);
+    }
+    return [predictedIndices, predictedValues, generatedValues];
+  }
+
+  /**
+   * Generate error range lines using +/- standard error
+   * on intercept to original line.
+   * @param {Array} generatedValues
+   * @param {Array} values
+   * @param {Array} predictedValues
+   * @return {Array}
+   */
+  static getErrorData(generatedValues, values, predictedValues) {
+    const diffs = [];
+    for (let i = 0; i < generatedValues.length; i++) {
+      diffs.push(values[values.length - generatedValues.length + i] -
+          generatedValues[i]);
+    }
+    const sqDiffs = diffs.map((v) => v * v);
+    const stdDev = sqDiffs.reduce((sum, v) => sum + v) / values.length;
+    const maxValues = predictedValues.map(
+        (x) => Math.round(100 * (x + stdDev)) / 100);
+    const minValues = predictedValues.map(
+        (x) => Math.round(100 * (x - stdDev)) / 100);
+    return [maxValues, minValues];
+  }
+
+  /**
+   * Format all data using scattered dot representation for a single chart line.
+   * @param {Array} indices
+   * @param {Array} values
+   * @param {humber} dateRange
+   * @param {number} predRange
+   * @param {number} frequency
+   * @param {Date} endDate
+   * @return {Array}
+   */
+  static getAllData(indices, values, dateRange, predRange, frequency, endDate) {
+    // Set the number of data points that needs to be generated based on
+    // future time range and frequency.
+    let interval;
+    switch (predRange) {
+      case predRangeType.NEXT_MONTH:
+        interval = frequency === 1 ? 30 : 4;
+        break;
+      case predRangeType.NEXT_QUARTER:
+        interval = frequency === 1 ? 90 : 13;
+        break;
+      case predRangeType.NEXT_50:
+        interval = Math.floor((dateRange + 1) / (frequency * 2));
+        break;
+    }
+
+    const [predictedIndices, predictedValues, generatedValues] =
+      MrChart.getPredictedData(values, dateRange, interval, frequency, endDate);
+    const [maxValues, minValues] =
+      MrChart.getErrorData(generatedValues, values, predictedValues);
+    const n = generatedValues.length;
+
+    // Format data into an array of {x:"MM/DD/YYYY", y:1.00} to draw chart.
+    const originalData = [];
+    const predictedData = [];
+    const maxData = [{
+      x: indices[values.length - 1],
+      y: generatedValues[n - 1],
+    }];
+    const minData = [{
+      x: indices[values.length - 1],
+      y: generatedValues[n - 1],
+    }];
+    for (let i = 0; i < values.length; i++) {
+      originalData.push({x: indices[i], y: values[i]});
+    }
+    for (let i = 0; i < n; i++) {
+      predictedData.push({x: indices[values.length - n + i],
+        y: Math.max(Math.round(100 * generatedValues[i]) / 100, 0)});
+    }
+    for (let i = 0; i < predictedValues.length; i++) {
+      predictedData.push({
+        x: predictedIndices[i],
+        y: Math.max(predictedValues[i], 0),
+      });
+      maxData.push({x: predictedIndices[i], y: Math.max(maxValues[i], 0)});
+      minData.push({x: predictedIndices[i], y: Math.max(minValues[i], 0)});
+    }
+    return [originalData, predictedData, maxData, minData];
+  }
+
+  /**
+   * Sort lines by data in reversed chronological order and
+   * return top n lines with most issues.
+   * @param {Array} arrayValues
+   * @param {number} index
+   * @return {Array}
+   */
+  static getSortedLines(arrayValues, index) {
+    if (index >= arrayValues.length) {
+      return arrayValues;
+    }
+    // Convert data by reversing and starting from last digit and sort
+    // according to the resulting value. e.g. [4,2,0] => 24, [0,4,3] => 340
+    const sortedValues = arrayValues.slice().sort((arrX, arrY) => {
+      const intX = parseInt(
+          arrX.data.map((i) => i.toString()).reverse().join(''));
+      const intY = parseInt(
+          arrY.data.map((i) => i.toString()).reverse().join(''));
+      return intY - intX;
+    });
+    return sortedValues.slice(0, index);
+  }
+
+  /**
+   * Parses queryParams for groupBy property
+   * @param {Object<string, string>} queryParams
+   * @return {Object<string, string>}
+   */
+  static getGroupByFromQuery(queryParams) {
+    const defaultValue = {display: 'None', value: ''};
+
+    const labelMapping = {
+      'label': {
+        display: queryParams.labelprefix,
+        value: 'label',
+        labelPrefix: queryParams.labelprefix,
+      },
+    };
+
+    return groupByMapping[queryParams.groupby] ||
+        labelMapping[queryParams.groupby] ||
+        defaultValue;
+  }
+}
+
+customElements.define('mr-chart', MrChart);
diff --git a/static_src/elements/issue-list/mr-chart/mr-chart.test.js b/static_src/elements/issue-list/mr-chart/mr-chart.test.js
new file mode 100644
index 0000000..8c079fd
--- /dev/null
+++ b/static_src/elements/issue-list/mr-chart/mr-chart.test.js
@@ -0,0 +1,524 @@
+import {assert} from 'chai';
+import sinon from 'sinon';
+
+import MrChart, {
+  subscribedQuery,
+} from 'elements/issue-list/mr-chart/mr-chart.js';
+import {prpcClient} from 'prpc-client-instance.js';
+
+let element;
+let dataLoadedPromise;
+
+const beforeEachElement = () => {
+  if (element && document.body.contains(element)) {
+    // Avoid setting up multiple versions of the same element.
+    document.body.removeChild(element);
+    element = null;
+  }
+  const el = document.createElement('mr-chart');
+  el.setAttribute('projectName', 'rutabaga');
+  dataLoadedPromise = new Promise((resolve) => {
+    el.addEventListener('allDataLoaded', resolve);
+  });
+
+  document.body.appendChild(el);
+  return el;
+};
+
+describe('mr-chart', () => {
+  beforeEach(() => {
+    window.CS_env = {
+      token: 'rutabaga-token',
+      tokenExpiresSec: 0,
+      app_version: 'rutabaga-version',
+    };
+    sinon.stub(prpcClient, 'call').callsFake(async () => {
+      return {
+        snapshotCount: [{count: 8}],
+        unsupportedField: [],
+        searchLimitReached: false,
+      };
+    });
+
+    element = beforeEachElement();
+  });
+
+  afterEach(async () => {
+    // _fetchData is always called when the element is connected, so we have to
+    // wait until all data has been loaded.
+    // Otherwise prpcClient.call will be restored and we will make actual XHR
+    // calls.
+    await dataLoadedPromise;
+
+    document.body.removeChild(element);
+
+    prpcClient.call.restore();
+  });
+
+  describe('initializes', () => {
+    it('renders', () => {
+      assert.instanceOf(element, MrChart);
+    });
+
+    it('sets this.projectname', () => {
+      assert.equal(element.projectName, 'rutabaga');
+    });
+  });
+
+  describe('data loading', () => {
+    beforeEach(() => {
+      // Stub MrChart.makeTimestamps to return 6, not 30 data points.
+      const originalMakeTimestamps = MrChart.makeTimestamps;
+      sinon.stub(MrChart, 'makeTimestamps').callsFake((endDate) => {
+        return originalMakeTimestamps(endDate, 1, 6);
+      });
+      sinon.stub(MrChart, 'getEndDate').callsFake(() => {
+        return new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+      });
+
+      // Re-instantiate element after stubs.
+      element = beforeEachElement();
+    });
+
+    afterEach(() => {
+      MrChart.makeTimestamps.restore();
+      MrChart.getEndDate.restore();
+    });
+
+    it('makes a series of XHR calls', async () => {
+      await dataLoadedPromise;
+      for (let i = 0; i < 6; i++) {
+        assert.deepEqual(element.values[i], new Map());
+      }
+    });
+
+    it('sets indices and correctly re-orders values', async () => {
+      await dataLoadedPromise;
+
+      const timestampMap = new Map([
+        [1540857599, 0], [1540943999, 1], [1541030399, 2], [1541116799, 3],
+        [1541203199, 4], [1541289599, 5],
+      ]);
+      sinon.stub(MrChart.prototype, '_fetchDataAtTimestamp').callsFake(
+          async (ts) => ({issues: {'Issue Count': timestampMap.get(ts)}}));
+
+      element.endDate = new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+      await element._fetchData();
+
+      assert.deepEqual(element.indices, [
+        '10/29/2018', '10/30/2018', '10/31/2018',
+        '11/1/2018', '11/2/2018', '11/3/2018',
+      ]);
+      for (let i = 0; i < 6; i++) {
+        assert.deepEqual(element.values[i], {'Issue Count': i});
+      }
+      MrChart.prototype._fetchDataAtTimestamp.restore();
+    });
+
+    it('if issue count is null, defaults to 0', async () => {
+      prpcClient.call.restore();
+      sinon.stub(prpcClient, 'call').callsFake(async () => {
+        return {snapshotCount: [{}]};
+      });
+      MrChart.makeTimestamps.restore();
+      sinon.stub(MrChart, 'makeTimestamps').callsFake((endDate) => {
+        return [1234567, 2345678, 3456789];
+      });
+
+      await element._fetchData(new Date());
+      assert.deepEqual(element.values[0], new Map());
+    });
+
+    it('Retrieve data under groupby feature', async () => {
+      const data = new Map([['Type-1', 0], ['Type-2', 1]]);
+      sinon.stub(MrChart.prototype, '_fetchDataAtTimestamp').callsFake(
+          () => ({issues: data}));
+
+      element = beforeEachElement();
+
+      await element._fetchData(new Date());
+      for (let i = 0; i < 3; i++) {
+        assert.deepEqual(element.values[i], data);
+      }
+      MrChart.prototype._fetchDataAtTimestamp.restore();
+    });
+
+    it('_fetchDataAtTimestamp has no default query or can', async () => {
+      await element._fetchData();
+
+      sinon.assert.calledWith(
+          prpcClient.call,
+          'monorail.Issues',
+          'IssueSnapshot',
+          {
+            cannedQuery: undefined,
+            groupBy: undefined,
+            hotlistId: undefined,
+            query: undefined,
+            projectName: 'rutabaga',
+            timestamp: 1540857599,
+          });
+    });
+  });
+
+  describe('start date change detection', () => {
+    it('illegal query: start-date is greater than end-date', async () => {
+      await element.updateComplete;
+
+      element.startDate = new Date('2199-11-06');
+      element._fetchData();
+
+      assert.equal(element.dateRange, 90);
+      assert.equal(element.frequency, 7);
+      assert.equal(element.dateRangeNotLegal, true);
+    });
+
+    it('illegal query: end_date - start_date requires more than 90 queries',
+        async () => {
+          await element.updateComplete;
+
+          element.startDate = new Date('2016-10-03');
+          element._fetchData();
+
+          assert.equal(element.dateRange, 90 * 7);
+          assert.equal(element.frequency, 7);
+          assert.equal(element.maxQuerySizeReached, true);
+        });
+  });
+
+  describe('date change behavior', () => {
+    it('pushes to history API via pageJS', async () => {
+      sinon.stub(element, '_page');
+      sinon.spy(element, '_setDateRange');
+      sinon.spy(element, '_onDateChanged');
+      sinon.spy(element, '_changeUrlParams');
+
+      await element.updateComplete;
+
+      const thirtyButton = element.shadowRoot
+          .querySelector('#two-toggle').children[2];
+      thirtyButton.click();
+
+      sinon.assert.calledOnce(element._setDateRange);
+      sinon.assert.calledOnce(element._onDateChanged);
+      sinon.assert.calledOnce(element._changeUrlParams);
+      sinon.assert.calledOnce(element._page);
+
+      element._page.restore();
+      element._setDateRange.restore();
+      element._onDateChanged.restore();
+      element._changeUrlParams.restore();
+    });
+  });
+
+  describe('progress bar', () => {
+    it('visible based on loading progress', async () => {
+      // Check for visible progress bar and hidden input after initial render
+      await element.updateComplete;
+      const progressBar = element.shadowRoot.querySelector('progress');
+      const endDateInput = element.shadowRoot.querySelector('#end-date');
+      assert.isFalse(progressBar.hasAttribute('hidden'));
+      assert.isTrue(endDateInput.disabled);
+
+      // Check for hidden progress bar and enabled input after fetch and render
+      await dataLoadedPromise;
+      await element.updateComplete;
+      assert.isTrue(progressBar.hasAttribute('hidden'));
+      assert.isFalse(endDateInput.disabled);
+
+      // Trigger another data fetch and render, but prior to fetch complete
+      // Check progress bar is visible again
+      element.queryParams['start-date'] = '2012-01-01';
+      await element.requestUpdate('queryParams');
+      await element.updateComplete;
+      assert.isFalse(progressBar.hasAttribute('hidden'));
+
+      await dataLoadedPromise;
+      await element.updateComplete;
+      assert.isTrue(progressBar.hasAttribute('hidden'));
+    });
+  });
+
+  describe('static methods', () => {
+    describe('sortInBisectOrder', () => {
+      it('orders first, last, median recursively', () => {
+        assert.deepEqual(MrChart.sortInBisectOrder([]), []);
+        assert.deepEqual(MrChart.sortInBisectOrder([9]), [9]);
+        assert.deepEqual(MrChart.sortInBisectOrder([8, 9]), [8, 9]);
+        assert.deepEqual(MrChart.sortInBisectOrder([7, 8, 9]), [7, 9, 8]);
+        assert.deepEqual(
+            MrChart.sortInBisectOrder([1, 2, 3, 4, 5]), [1, 5, 3, 2, 4]);
+      });
+    });
+
+    describe('makeTimestamps', () => {
+      it('throws an error if endDate not passed', () => {
+        assert.throws(() => {
+          MrChart.makeTimestamps();
+        }, 'endDate required');
+      });
+      it('returns an array of in seconds', () => {
+        const endDate = new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+        const secondsInDay = 24 * 60 * 60;
+
+        assert.deepEqual(MrChart.makeTimestamps(endDate, 1, 6), [
+          1541289599 - (secondsInDay * 5), 1541289599 - (secondsInDay * 4),
+          1541289599 - (secondsInDay * 3), 1541289599 - (secondsInDay * 2),
+          1541289599 - (secondsInDay * 1), 1541289599 - (secondsInDay * 0),
+        ]);
+      });
+      it('tests frequency greater than 1', () => {
+        const endDate = new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+        const secondsInDay = 24 * 60 * 60;
+
+        assert.deepEqual(MrChart.makeTimestamps(endDate, 2, 6), [
+          1541289599 - (secondsInDay * 4),
+          1541289599 - (secondsInDay * 2),
+          1541289599 - (secondsInDay * 0),
+        ]);
+      });
+      it('tests frequency greater than 1', () => {
+        const endDate = new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+        const secondsInDay = 24 * 60 * 60;
+
+        assert.deepEqual(MrChart.makeTimestamps(endDate, 2, 7), [
+          1541289599 - (secondsInDay * 6),
+          1541289599 - (secondsInDay * 4),
+          1541289599 - (secondsInDay * 2),
+          1541289599 - (secondsInDay * 0),
+        ]);
+      });
+    });
+
+    describe('dateStringToDate', () => {
+      it('returns null if no input', () => {
+        assert.isNull(MrChart.dateStringToDate());
+      });
+
+      it('returns a new Date at EOD UTC', () => {
+        const actualDate = MrChart.dateStringToDate('2018-11-03');
+        const expectedDate = new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+        assert.equal(expectedDate.getTime(), 1541289599000, 'Sanity check.');
+
+        assert.equal(actualDate.getTime(), expectedDate.getTime());
+      });
+    });
+
+    describe('getEndDate', () => {
+      let clock;
+
+      beforeEach(() => {
+        clock = sinon.useFakeTimers(10000);
+      });
+
+      afterEach(() => {
+        clock.restore();
+      });
+
+      it('returns parsed input date', () => {
+        const input = '2018-11-03';
+
+        const expectedDate = new Date(Date.UTC(2018, 10, 3, 23, 59, 59));
+        // Time sanity check.
+        assert.equal(Math.round(expectedDate.getTime() / 1e3), 1541289599);
+
+        const actual = MrChart.getEndDate(input);
+        assert.equal(actual.getTime(), expectedDate.getTime());
+      });
+
+      it('returns EOD of current date by default', () => {
+        const expectedDate = new Date();
+        expectedDate.setHours(23);
+        expectedDate.setMinutes(59);
+        expectedDate.setSeconds(59);
+
+        assert.equal(MrChart.getEndDate().getTime(),
+            expectedDate.getTime());
+      });
+    });
+
+    describe('getStartDate', () => {
+      let clock;
+
+      beforeEach(() => {
+        clock = sinon.useFakeTimers(10000);
+      });
+
+      afterEach(() => {
+        clock.restore();
+      });
+
+      it('returns parsed input date', () => {
+        const input = '2018-07-03';
+
+        const expectedDate = new Date(Date.UTC(2018, 6, 3, 23, 59, 59));
+        // Time sanity check.
+        assert.equal(Math.round(expectedDate.getTime() / 1e3), 1530662399);
+
+        const actual = MrChart.getStartDate(input);
+        assert.equal(actual.getTime(), expectedDate.getTime());
+      });
+
+      it('returns EOD of current date by default', () => {
+        const today = new Date();
+        today.setHours(23);
+        today.setMinutes(59);
+        today.setSeconds(59);
+
+        const secondsInDay = 24 * 60 * 60;
+        const expectedDate = new Date(today.getTime() -
+            1000 * 90 * secondsInDay);
+        assert.equal(MrChart.getStartDate(undefined, today, 90).getTime(),
+            expectedDate.getTime());
+      });
+    });
+
+    describe('makeIndices', () => {
+      it('returns dates in mm/dd/yyy format', () => {
+        const timestamps = [
+          1540857599, 1540943999, 1541030399,
+          1541116799, 1541203199, 1541289599,
+        ];
+        assert.deepEqual(MrChart.makeIndices(timestamps), [
+          '10/29/2018', '10/30/2018', '10/31/2018',
+          '11/1/2018', '11/2/2018', '11/3/2018',
+        ]);
+      });
+    });
+
+    describe('getPredictedData', () => {
+      it('get predicted data shown in daily', () => {
+        const values = [0, 1, 2, 3, 4, 5, 6];
+        const result = MrChart.getPredictedData(
+            values, values.length, 3, 1, new Date('10-02-2017'));
+        assert.deepEqual(result[0], ['10/4/2017', '10/5/2017', '10/6/2017']);
+        assert.deepEqual(result[1], [7, 8, 9]);
+        assert.deepEqual(result[2], [0, 1, 2, 3, 4, 5, 6]);
+      });
+
+      it('get predicted data shown in weekly', () => {
+        const values = [0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84];
+        const result = MrChart.getPredictedData(
+            values, 91, 13, 7, new Date('10-02-2017'));
+        assert.deepEqual(result[1], values.map((x) => x+91));
+        assert.deepEqual(result[2], values);
+      });
+    });
+
+    describe('getErrorData', () => {
+      it('get error data with perfect regression', () => {
+        const values = [0, 1, 2, 3, 4, 5, 6];
+        const result = MrChart.getErrorData(values, values, [7, 8, 9]);
+        assert.deepEqual(result[0], [7, 8, 9]);
+        assert.deepEqual(result[1], [7, 8, 9]);
+      });
+
+      it('get error data with nonperfect regression', () => {
+        const values = [0, 1, 3, 4, 6, 6, 7];
+        const result = MrChart.getPredictedData(
+            values, values.length, 3, 1, new Date('10-02-2017'));
+        const error = MrChart.getErrorData(result[2], values, result[1]);
+        assert.isTrue(error[0][0] > result[1][0]);
+        assert.isTrue(error[1][0] < result[1][0]);
+      });
+    });
+
+    describe('getSortedLines', () => {
+      it('return all lines for less than n lines', () => {
+        const arrayValues = [
+          {label: 'line1', data: [0, 0, 1]},
+          {label: 'line2', data: [0, 1, 2]},
+          {label: 'line3', data: [0, 1, 0]},
+          {label: 'line4', data: [4, 0, 3]},
+        ];
+        const expectedValues = [
+          {label: 'line1', data: [0, 0, 1]},
+          {label: 'line2', data: [0, 1, 2]},
+          {label: 'line3', data: [0, 1, 0]},
+          {label: 'line4', data: [4, 0, 3]},
+        ];
+        const actualValues = MrChart.getSortedLines(arrayValues, 4);
+        for (let i = 0; i < 4; i++) {
+          assert.deepEqual(expectedValues[i], actualValues[i]);
+        }
+      });
+
+      it('return top n lines in sorted order for more than n lines',
+          () => {
+            const arrayValues = [
+              {label: 'line1', data: [0, 0, 1]},
+              {label: 'line2', data: [0, 1, 2]},
+              {label: 'line3', data: [0, 4, 0]},
+              {label: 'line4', data: [4, 0, 3]},
+              {label: 'line5', data: [0, 2, 3]},
+            ];
+            const expectedValues = [
+              {label: 'line5', data: [0, 2, 3]},
+              {label: 'line4', data: [4, 0, 3]},
+              {label: 'line2', data: [0, 1, 2]},
+            ];
+            const actualValues = MrChart.getSortedLines(arrayValues, 3);
+            for (let i = 0; i < 3; i++) {
+              assert.deepEqual(expectedValues[i], actualValues[i]);
+            }
+          });
+    });
+
+    describe('getGroupByFromQuery', () => {
+      it('get group by label object from URL', () => {
+        const input = {'groupby': 'label', 'labelprefix': 'Type'};
+
+        const expectedGroupBy = {
+          value: 'label',
+          labelPrefix: 'Type',
+          display: 'Type',
+        };
+        assert.deepEqual(MrChart.getGroupByFromQuery(input), expectedGroupBy);
+      });
+
+      it('get group by is open object from URL', () => {
+        const input = {'groupby': 'open'};
+
+        const expectedGroupBy = {value: 'open', display: 'Is open'};
+        assert.deepEqual(MrChart.getGroupByFromQuery(input), expectedGroupBy);
+      });
+
+      it('get group by none object from URL', () => {
+        const input = {'groupby': ''};
+
+        const expectedGroupBy = {value: '', display: 'None'};
+        assert.deepEqual(MrChart.getGroupByFromQuery(input), expectedGroupBy);
+      });
+
+      it('only returns valid groupBy values', () => {
+        const invalidKeys = ['pri', 'reporter', 'stars'];
+
+        const queryParams = {groupBy: ''};
+
+        invalidKeys.forEach((key) => {
+          queryParams.groupBy = key;
+          const expected = {value: '', display: 'None'};
+          const result = MrChart.getGroupByFromQuery(queryParams);
+          assert.deepEqual(result, expected);
+        });
+      });
+    });
+  });
+
+  describe('subscribedQuery', () => {
+    it('includes start and end date', () => {
+      assert.isTrue(subscribedQuery.has('start-date'));
+      assert.isTrue(subscribedQuery.has('start-date'));
+    });
+
+    it('includes groupby and labelprefix', () => {
+      assert.isTrue(subscribedQuery.has('groupby'));
+      assert.isTrue(subscribedQuery.has('labelprefix'));
+    });
+
+    it('includes q and can', () => {
+      assert.isTrue(subscribedQuery.has('q'));
+      assert.isTrue(subscribedQuery.has('can'));
+    });
+  });
+});
diff --git a/static_src/elements/issue-list/mr-grid-page/extract-grid-data.js b/static_src/elements/issue-list/mr-grid-page/extract-grid-data.js
new file mode 100644
index 0000000..ebfa510
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/extract-grid-data.js
@@ -0,0 +1,203 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {EMPTY_FIELD_VALUE, fieldTypes} from 'shared/issue-fields.js';
+import 'shared/typedef.js';
+
+
+const DEFAULT_HEADER_VALUE = 'All';
+
+// Sort headings functions
+// TODO(zhangtiff): Find some way to restructure this code to allow
+// sorting functions to sort with raw types instead of stringified values.
+
+/**
+ * Used as an optional 'compareFunction' for Array.sort().
+ * @param {string} strA
+ * @param {string} strB
+ * @return {number}
+ */
+function intStrComparator(strA, strB) {
+  return parseInt(strA) - parseInt(strB);
+}
+
+/**
+ * Used as an optional 'compareFunction' for Array.sort()
+ * @param {string} issueRefStrA
+ * @param {string} issueRefStrB
+ * @return {number}
+ */
+function issueRefComparator(issueRefStrA, issueRefStrB) {
+  const issueRefA = issueRefStrA.split(':');
+  const issueRefB = issueRefStrB.split(':');
+  if (issueRefA[0] != issueRefB[0]) {
+    return issueRefStrA.localeCompare(issueRefStrB);
+  } else {
+    return parseInt(issueRefA[1]) - parseInt(issueRefB[1]);
+  }
+}
+
+/**
+ * Returns a comparator for strings representing statuses using the ordering
+ * provided in statusDefs.
+ * Any status not found in statusDefs will be sorted to the end.
+ * @param {!Array<StatusDef>=} statusDefs
+ * @return {function(string, string): number}
+ */
+function getStatusDefComparator(statusDefs = []) {
+  return (statusStrA, statusStrB) => {
+    // Traverse statusDefs to determine which status is first.
+    for (const statusDef of statusDefs) {
+      if (statusDef.status == statusStrA) {
+        return -1;
+      } else if (statusDef.status == statusStrB) {
+        return 1;
+      }
+    }
+    return 0;
+  };
+}
+
+/**
+ * @param {!Set<string>} headingSet The headers found for the field.
+ * @param {string} fieldName The field on which we're sorting.
+ * @param {function(string): string=} extractTypeForFieldName
+ * @param {!Array<StatusDef>=} statusDefs
+ * @return {!Array<string>}
+ */
+function sortHeadings(headingSet, fieldName, extractTypeForFieldName,
+    statusDefs = []) {
+  let sorter;
+  if (extractTypeForFieldName) {
+    const type = extractTypeForFieldName(fieldName);
+    if (type === fieldTypes.ISSUE_TYPE) {
+      sorter = issueRefComparator;
+    } else if (type === fieldTypes.INT_TYPE) {
+      sorter = intStrComparator;
+    } else if (type === fieldTypes.STATUS_TYPE) {
+      sorter = getStatusDefComparator(statusDefs);
+    }
+  }
+
+  // Track whether EMPTY_FIELD_VALUE is present, and ensure that
+  // it is sorted to the first position of custom fields.
+  // TODO(jessan): although convenient, it is bad practice to mutate parameters.
+  const hasEmptyFieldValue = headingSet.delete(EMPTY_FIELD_VALUE);
+  const headingsList = [...headingSet];
+
+  headingsList.sort(sorter);
+
+  if (hasEmptyFieldValue) {
+    headingsList.unshift(EMPTY_FIELD_VALUE);
+  }
+  return headingsList;
+}
+
+/**
+ * @param {string} x Header value.
+ * @param {string} y Header value.
+ * @return {string} The key for the groupedIssue map.
+ * TODO(jessan): Make a GridData class, which avoids exposing this logic.
+ */
+export function makeGridCellKey(x, y) {
+  // Note: Some possible x and y values contain ':', '-', and other
+  // non-word characters making delimiter options limited.
+  return x + ' + ' + y;
+}
+
+/**
+ * @param {Issue} issue The issue for which we're preparing grid headings.
+ * @param {string} fieldName The field on which we're grouping.
+ * @param {function(Issue, string): Array<string>} extractFieldValuesFromIssue
+ * @return {!Array<string>} The headings the issue should be grouped into.
+ */
+function prepareHeadings(
+    issue, fieldName, extractFieldValuesFromIssue) {
+  const values = extractFieldValuesFromIssue(issue, fieldName);
+
+  return values.length == 0 ?
+     [EMPTY_FIELD_VALUE] :
+     values;
+}
+
+/**
+ * Groups issues by their values for the given fields.
+ * @param {Array<Issue>} required.issues The issues we are grouping
+ * @param {function(Issue, string): Array<string>}
+ *     required.extractFieldValuesFromIssue
+ * @param {string=} options.xFieldName name of the field for grouping columns
+ * @param {string=} options.yFieldName name of the field for grouping rows
+ * @param {function(string): string=} options.extractTypeForFieldName
+ * @param {Array=} options.statusDefs
+ * @param {Map=} options.labelPrefixValueMap
+ * @return {!Object} Grid data
+ *   - groupedIssues: A map of issues grouped by thir xField and yField values.
+ *   - xHeadings: sorted headings for columns.
+ *   - yHeadings: sorted headings for rows.
+ */
+export function extractGridData({issues, extractFieldValuesFromIssue}, {
+  xFieldName = '',
+  yFieldName = '',
+  extractTypeForFieldName = undefined,
+  statusDefs = [],
+  labelPrefixValueMap = new Map(),
+} = {}) {
+  const xHeadingsPredefinedSet = new Set();
+  const xHeadingsAdHocSet = new Set();
+  const yHeadingsSet = new Set();
+  const groupedIssues = new Map();
+  for (const issue of issues) {
+    const xHeadings = !xFieldName ?
+        [DEFAULT_HEADER_VALUE] :
+        prepareHeadings(
+            issue, xFieldName, extractFieldValuesFromIssue);
+    const yHeadings = !yFieldName ?
+        [DEFAULT_HEADER_VALUE] :
+        prepareHeadings(
+            issue, yFieldName, extractFieldValuesFromIssue);
+
+    // Find every combo of 'xValue yValue' that the issue belongs to
+    // and add it into that cell. Also record each header used.
+    for (const xHeading of xHeadings) {
+      if (labelPrefixValueMap.has(xFieldName) &&
+          labelPrefixValueMap.get(xFieldName).has(xHeading)) {
+        xHeadingsPredefinedSet.add(xHeading);
+      } else {
+        xHeadingsAdHocSet.add(xHeading);
+      }
+      for (const yHeading of yHeadings) {
+        yHeadingsSet.add(yHeading);
+        const cellKey = makeGridCellKey(xHeading, yHeading);
+        if (groupedIssues.has(cellKey)) {
+          groupedIssues.get(cellKey).push(issue);
+        } else {
+          groupedIssues.set(cellKey, [issue]);
+        }
+      }
+    }
+  }
+
+  // Predefined labels to be ordered in front of ad hoc labels
+  const xHeadings = [
+    ...sortHeadings(
+        xHeadingsPredefinedSet,
+        xFieldName,
+        extractTypeForFieldName,
+        statusDefs,
+    ),
+    ...sortHeadings(
+        xHeadingsAdHocSet,
+        xFieldName,
+        extractTypeForFieldName,
+        statusDefs,
+    ),
+  ];
+
+  return {
+    groupedIssues,
+    xHeadings,
+    yHeadings: sortHeadings(yHeadingsSet, yFieldName, extractTypeForFieldName,
+        statusDefs),
+  };
+}
diff --git a/static_src/elements/issue-list/mr-grid-page/extract-grid-data.test.js b/static_src/elements/issue-list/mr-grid-page/extract-grid-data.test.js
new file mode 100644
index 0000000..41d5c70
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/extract-grid-data.test.js
@@ -0,0 +1,289 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {extractGridData} from './extract-grid-data.js';
+import {extractFieldValuesFromIssue as fieldExtractor,
+  extractTypeForFieldName as typeExtractor} from 'reducers/projectV0.js';
+
+const extractFieldValuesFromIssue = fieldExtractor({});
+const extractTypeForFieldName = typeExtractor({});
+
+
+describe('extract headings from x and y attributes', () => {
+  it('no attributes set', () => {
+    const issues = [
+      {'localId': 1, 'projectName': 'test'},
+      {'localId': 2, 'projectName': 'test'},
+    ];
+
+    const data = extractGridData({
+      issues,
+      extractFieldValuesFromIssue,
+    });
+
+    const expectedIssues = new Map([
+      ['All + All', [
+        {'localId': 1, 'projectName': 'test'},
+        {'localId': 2, 'projectName': 'test'},
+      ]],
+    ]);
+
+    assert.deepEqual(data.xHeadings, ['All']);
+    assert.deepEqual(data.yHeadings, ['All']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Attachments attribute', () => {
+    const issues = [
+      {'attachmentCount': 1}, {'attachmentCount': 0},
+      {'attachmentCount': 1},
+    ];
+
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'Attachments'});
+
+    const expectedIssues = new Map([
+      ['0 + All', [{'attachmentCount': 0}]],
+      ['1 + All', [{'attachmentCount': 1}, {'attachmentCount': 1}]],
+    ]);
+
+    assert.deepEqual(data.xHeadings, ['0', '1']);
+    assert.deepEqual(data.yHeadings, ['All']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Blocked attribute', () => {
+    const issues = [
+      {'blockedOnIssueRefs': [{'localId': 21}]},
+      {'otherIssueProperty': 'issueProperty'},
+    ];
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'Blocked', yFieldName: ''});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('Yes + All',
+        [{'blockedOnIssueRefs': [{'localId': 21}]}]);
+    expectedIssues.set('No + All', [{'otherIssueProperty': 'issueProperty'}]);
+
+    assert.deepEqual(data.xHeadings, ['No', 'Yes']);
+    assert.deepEqual(data.yHeadings, ['All']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from BlockedOn attribute', () => {
+    const issues = [
+      {'otherIssueProperty': 'issueProperty'},
+      {'blockedOnIssueRefs': [
+        {'localId': 3, 'projectName': 'test-projectB'}]},
+      {'blockedOnIssueRefs': [
+        {'localId': 3, 'projectName': 'test-projectA'}]},
+      {'blockedOnIssueRefs': [
+        {'localId': 3, 'projectName': 'test-projectA'}]},
+      {'blockedOnIssueRefs': [
+        {'localId': 1, 'projectName': 'test-projectA'}]},
+    ];
+
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'BlockedOn', yFieldName: ''});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('test-projectB:3 + All', [{'blockedOnIssueRefs':
+      [{'localId': 3, 'projectName': 'test-projectB'}]}]);
+    expectedIssues.set('test-projectA:3 + All', [{'blockedOnIssueRefs':
+      [{'localId': 3, 'projectName': 'test-projectA'}]},
+    {'blockedOnIssueRefs':
+      [{'localId': 3, 'projectName': 'test-projectA'}]}]);
+    expectedIssues.set('test-projectA:1 + All', [{'blockedOnIssueRefs':
+      [{'localId': 1, 'projectName': 'test-projectA'}]}]);
+    expectedIssues.set('---- + All', [{'otherIssueProperty': 'issueProperty'}]);
+
+    assert.deepEqual(data.xHeadings, ['----', 'test-projectA:1',
+      'test-projectA:3', 'test-projectB:3']);
+    assert.deepEqual(data.yHeadings, ['All']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Blocking attribute', () => {
+    const issues = [
+      {'otherIssueProperty': 'issueProperty'},
+      {'blockingIssueRefs': [
+        {'localId': 1, 'projectName': 'test-projectA'}]},
+      {'blockingIssueRefs': [
+        {'localId': 1, 'projectName': 'test-projectA'}]},
+      {'blockingIssueRefs': [
+        {'localId': 3, 'projectName': 'test-projectA'}]},
+      {'blockingIssueRefs': [
+        {'localId': 3, 'projectName': 'test-projectB'}]},
+    ];
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'Blocking', yFieldName: ''});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('test-projectA:1 + All', [{'blockingIssueRefs':
+      [{'localId': 1, 'projectName': 'test-projectA'}]},
+    {'blockingIssueRefs':
+      [{'localId': 1, 'projectName': 'test-projectA'}]}]);
+    expectedIssues.set('test-projectA:3 + All', [{'blockingIssueRefs':
+      [{'localId': 3, 'projectName': 'test-projectA'}]}]);
+    expectedIssues.set('test-projectB:3 + All', [{'blockingIssueRefs':
+      [{'localId': 3, 'projectName': 'test-projectB'}]}]);
+    expectedIssues.set('---- + All', [{'otherIssueProperty': 'issueProperty'}]);
+
+    assert.deepEqual(data.xHeadings, ['----', 'test-projectA:1',
+      'test-projectA:3', 'test-projectB:3']);
+    assert.deepEqual(data.yHeadings, ['All']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Component attribute', () => {
+    const issues = [
+      {'otherIssueProperty': 'issueProperty'},
+      {'componentRefs': [{'path': 'UI'}]},
+      {'componentRefs': [{'path': 'API'}]},
+      {'componentRefs': [{'path': 'UI'}]},
+    ];
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'Component', yFieldName: ''});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('UI + All', [{'componentRefs': [{'path': 'UI'}]},
+      {'componentRefs': [{'path': 'UI'}]}]);
+    expectedIssues.set('API + All', [{'componentRefs': [{'path': 'API'}]}]);
+    expectedIssues.set('---- + All', [{'otherIssueProperty': 'issueProperty'}]);
+
+    assert.deepEqual(data.xHeadings, ['----', 'API', 'UI']);
+    assert.deepEqual(data.yHeadings, ['All']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Reporter attribute', () => {
+    const issues = [
+      {'reporterRef': {'displayName': 'testA@google.com'}},
+      {'reporterRef': {'displayName': 'testB@google.com'}},
+    ];
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: '', yFieldName: 'Reporter'});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('All + testA@google.com',
+        [{'reporterRef': {'displayName': 'testA@google.com'}}]);
+    expectedIssues.set('All + testB@google.com',
+        [{'reporterRef': {'displayName': 'testB@google.com'}}]);
+
+    assert.deepEqual(data.xHeadings, ['All']);
+    assert.deepEqual(data.yHeadings, ['testA@google.com', 'testB@google.com']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Stars attribute', () => {
+    const issues = [
+      {'starCount': 1}, {'starCount': 6}, {'starCount': 1},
+    ];
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: '', yFieldName: 'Stars'});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('All + 1', [{'starCount': 1}, {'starCount': 1}]);
+    expectedIssues.set('All + 6', [{'starCount': 6}]);
+
+    assert.deepEqual(data.xHeadings, ['All']);
+    assert.deepEqual(data.yHeadings, ['1', '6']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from Status in order of statusDefs provided', () => {
+    const issues = [
+      {'statusRef': {'status': 'New'}},
+      {'statusRef': {'status': '1Unknown'}},
+      {'statusRef': {'status': 'Accepted'}},
+      {'statusRef': {'status': 'New'}},
+      {'statusRef': {'status': 'UltraNew'}},
+    ];
+    const statusDefs = [
+      {status: 'UltraNew'}, {status: 'New'}, {status: 'Unused'},
+      {status: 'Accepted'},
+    ];
+
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {yFieldName: 'Status', extractTypeForFieldName, statusDefs});
+
+    const expectedIssues = new Map();
+    expectedIssues.set(
+        'All + Accepted', [{'statusRef': {'status': 'Accepted'}}]);
+    expectedIssues.set(
+        'All + New',
+        [{'statusRef': {'status': 'New'}}, {'statusRef': {'status': 'New'}}]);
+    expectedIssues.set(
+        'All + UltraNew', [{'statusRef': {'status': 'UltraNew'}}]);
+    expectedIssues.set(
+        'All + 1Unknown', [{'statusRef': {'status': '1Unknown'}}]);
+    assert.deepEqual(data.xHeadings, ['All']);
+    assert.deepEqual(
+        data.yHeadings, ['UltraNew', 'New', 'Accepted', '1Unknown']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('extract headings from the Type attribute', () => {
+    const issues = [
+      {'labelRefs': [{'label': 'Pri-2'}, {'label': 'Milestone-2000Q1'}]},
+      {'labelRefs': [{'label': 'Type-Defect'}]},
+      {'labelRefs': [{'label': 'Type-Defect'}]},
+      {'labelRefs': [{'label': 'Type-Enhancement'}]},
+    ];
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {yFieldName: 'Type'});
+
+    const expectedIssues = new Map();
+    expectedIssues.set('All + Defect', [
+      {'labelRefs': [{'label': 'Type-Defect'}]},
+      {'labelRefs': [{'label': 'Type-Defect'}]},
+    ]);
+    expectedIssues.set('All + Enhancement', [{'labelRefs':
+      [{'label': 'Type-Enhancement'}]}]);
+    expectedIssues.set('All + ----', [{'labelRefs':
+      [{'label': 'Pri-2'}, {'label': 'Milestone-2000Q1'}]}]);
+
+    assert.deepEqual(data.xHeadings, ['All']);
+    assert.deepEqual(data.yHeadings, ['----', 'Defect', 'Enhancement']);
+    assert.deepEqual(data.groupedIssues, expectedIssues);
+  });
+
+  it('puts predefined labels ahead of ad hoc labels', () => {
+    const issues = [
+      {'labelRefs': [{'label': 'Pri-2'}, {'label': 'Type-Defect'}]},
+      {'labelRefs': [{'label': 'Type-Defect'}]},
+      {'labelRefs': [{'label': 'Type-Enhancement'}]},
+      {'labelRefs': [{'label': 'Type-AAA'}]},
+    ];
+    const labelPrefixValueMap = new Map([
+      ['Pri', new Set(['2'])],
+      ['Type', new Set(['Defect', 'Enhancement'])],
+    ]);
+
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'Type', yFieldName: 'Pri', labelPrefixValueMap});
+
+    assert.deepEqual(data.xHeadings, ['Defect', 'Enhancement', 'AAA']);
+    assert.deepEqual(data.yHeadings, ['----', '2']);
+  });
+
+  it('has priority order of predefined, empty, then ad hoc labels', () => {
+    const issues = [
+      {'labelRefs': [{'label': 'Pri-2'}, {'label': 'Milestone-2000Q1'}]},
+      {'labelRefs': [{'label': 'Type-Defect'}]},
+      {'labelRefs': [{'label': 'Type-Enhancement'}]},
+      {'labelRefs': [{'label': 'Type-AAA'}]},
+    ];
+    const labelPrefixValueMap = new Map([
+      ['Pri', new Set(['2'])],
+      ['Type', new Set(['Defect', 'Enhancement'])],
+    ]);
+
+    const data = extractGridData({issues, extractFieldValuesFromIssue},
+        {xFieldName: 'Type', yFieldName: 'Pri', labelPrefixValueMap});
+
+    assert.deepEqual(data.xHeadings, ['Defect', 'Enhancement', '----', 'AAA']);
+  });
+});
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-controls.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-controls.js
new file mode 100644
index 0000000..2fe01ea
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-controls.js
@@ -0,0 +1,255 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import page from 'page';
+import {connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import 'elements/chops/chops-choice-buttons/chops-choice-buttons.js';
+import '../mr-mode-selector/mr-mode-selector.js';
+import './mr-grid-dropdown.js';
+import {SERVER_LIST_ISSUES_LIMIT} from 'shared/consts/index.js';
+import {urlWithNewParams} from 'shared/helpers.js';
+import {fieldsForIssue} from 'shared/issue-fields.js';
+
+// A list of the valid default field names available in an issue grid.
+// High cardinality fields must be excluded, so the grid only includes a subset
+// of AVAILABLE FIELDS.
+export const DEFAULT_GRID_FIELDS = Object.freeze([
+  'Project',
+  'Attachments',
+  'Blocked',
+  'BlockedOn',
+  'Blocking',
+  'Component',
+  'MergedInto',
+  'Reporter',
+  'Stars',
+  'Status',
+  'Type',
+  'Owner',
+]);
+
+/**
+ * Component for displaying the controls shown on the Monorail issue grid page.
+ * @extends {LitElement}
+ */
+export class MrGridControls extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        box-sizing: border-box;
+        margin: 0.5em 0;
+        height: 32px;
+      }
+      mr-grid-dropdown {
+        padding-right: 20px;
+      }
+      .left-controls {
+        display: flex;
+        align-items: center;
+        justify-content: flex-start;
+        flex-grow: 0;
+      }
+      .right-controls {
+        display: flex;
+        align-items: center;
+        flex-grow: 0;
+      }
+      .issue-count {
+        display: inline-block;
+        padding-right: 20px;
+      }
+    `;
+  };
+
+  /** @override */
+  render() {
+    const hideCounts = this.totalIssues === 0;
+    return html`
+      <div class="left-controls">
+        <mr-grid-dropdown
+          class="row-selector"
+          .text=${'Rows'}
+          .items=${this.gridOptions}
+          .selection=${this.queryParams.y}
+          @change=${this._rowChanged}>
+        </mr-grid-dropdown>
+        <mr-grid-dropdown
+          class="col-selector"
+          .text=${'Cols'}
+          .items=${this.gridOptions}
+          .selection=${this.queryParams.x}
+          @change=${this._colChanged}>
+        </mr-grid-dropdown>
+        <chops-choice-buttons
+          class="cell-selector"
+          .options=${this.cellOptions}
+          .value=${this.cellType}>
+        </chops-choice-buttons>
+      </div>
+      <div class="right-controls">
+        ${hideCounts ? '' : html`
+          <div class="issue-count">
+            ${this.issueCount}
+            of
+            ${this.totalIssuesDisplay}
+          </div>
+        `}
+        <mr-mode-selector
+          .projectName=${this.projectName}
+          .queryParams=${this.queryParams}
+          value="grid"
+        ></mr-mode-selector>
+      </div>
+    `;
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.gridOptions = this._computeGridOptions([]);
+    this.queryParams = {};
+
+    this.totalIssues = 0;
+
+    this._page = page;
+  };
+
+  /** @override */
+  static get properties() {
+    return {
+      gridOptions: {type: Array},
+      projectName: {tupe: String},
+      queryParams: {type: Object},
+      issueCount: {type: Number},
+      totalIssues: {type: Number},
+      _issues: {type: Array},
+    };
+  };
+
+  /** @override */
+  stateChanged(state) {
+    this.totalIssues = issueV0.totalIssues(state) || 0;
+    this._issues = issueV0.issueList(state) || [];
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('_issues')) {
+      this.gridOptions = this._computeGridOptions(this._issues);
+    }
+    super.update(changedProperties);
+  }
+
+  /**
+   * Gets what issue filtering options exist on the grid view.
+   * @param {Array<Issue>} issues The issues to find values on.
+   * @param {Array<string>=} defaultFields Available built in fields.
+   * @return {Array<string>} Array of names of fields you can filter by.
+   */
+  _computeGridOptions(issues, defaultFields = DEFAULT_GRID_FIELDS) {
+    const availableFields = new Set(defaultFields);
+    issues.forEach((issue) => {
+      fieldsForIssue(issue, true).forEach((field) => {
+        availableFields.add(field);
+      });
+    });
+    const options = [...availableFields].sort();
+    options.unshift('None');
+    return options;
+  }
+
+  /**
+   * @return {string} Display text of total issue number.
+   */
+  get totalIssuesDisplay() {
+    if (this.issueCount === 1) {
+      return `${this.issueCount} issue shown`;
+    } else if (this.issueCount === SERVER_LIST_ISSUES_LIMIT) {
+      // Server has hard limit up to 100,000 list results
+      return `100,000+ issues shown`;
+    }
+    return `${this.issueCount} issues shown`;
+  }
+
+  /**
+   * @return {string} What cell mode the user has selected.
+   * ie: Tiles, IDs, Counts
+   */
+  get cellType() {
+    const cells = this.queryParams.cells;
+    return cells || 'tiles';
+  }
+
+  /**
+   * @return {Array<Object>} Cell options available to the user, formatted for
+   *   <mr-mode-selector>
+   */
+  get cellOptions() {
+    return [
+      {text: 'Tile', value: 'tiles',
+        url: this._updatedGridViewUrl({}, ['cells'])},
+      {text: 'IDs', value: 'ids',
+        url: this._updatedGridViewUrl({cells: 'ids'})},
+      {text: 'Counts', value: 'counts',
+        url: this._updatedGridViewUrl({cells: 'counts'})},
+    ];
+  }
+
+  /**
+   * Changes the URL parameters on the page in response to a user changing
+   * their row setting.
+   * @param {Event} e 'change' event fired by <mr-grid-dropdown>
+   */
+  _rowChanged(e) {
+    const y = e.target.selection;
+    let deletedParams;
+    if (y === 'None') {
+      deletedParams = ['y'];
+    }
+    this._changeUrlParams({y}, deletedParams);
+  }
+
+  /**
+   * Changes the URL parameters on the page in response to a user changing
+   * their col setting.
+   * @param {Event} e 'change' event fired by <mr-grid-dropdown>
+   */
+  _colChanged(e) {
+    const x = e.target.selection;
+    let deletedParams;
+    if (x === 'None') {
+      deletedParams = ['x'];
+    }
+    this._changeUrlParams({x}, deletedParams);
+  }
+
+  /**
+   * Helper method to update URL params with a new grid view URL.
+   * @param {Array<Object>} newParams
+   * @param {Array<string>} deletedParams
+   */
+  _changeUrlParams(newParams, deletedParams) {
+    const newUrl = this._updatedGridViewUrl(newParams, deletedParams);
+    this._page(newUrl);
+  }
+
+  /**
+   * Helper to generate a new grid view URL given a set of params.
+   * @param {Array<Object>} newParams
+   * @param {Array<string>} deletedParams
+   * @return {string} The generated URL.
+   */
+  _updatedGridViewUrl(newParams, deletedParams) {
+    return urlWithNewParams(`/p/${this.projectName}/issues/list`,
+        this.queryParams, newParams, deletedParams);
+  }
+};
+
+customElements.define('mr-grid-controls', MrGridControls);
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-controls.test.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-controls.test.js
new file mode 100644
index 0000000..d6d7fbf
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-controls.test.js
@@ -0,0 +1,111 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import sinon from 'sinon';
+import {assert} from 'chai';
+import {MrGridControls} from './mr-grid-controls.js';
+import {SERVER_LIST_ISSUES_LIMIT} from 'shared/consts/index.js';
+
+let element;
+
+describe('mr-grid-controls', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-grid-controls');
+    document.body.appendChild(element);
+
+    element._page = sinon.stub();
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrGridControls);
+  });
+
+  it('selecting row updates y param', async () => {
+    const stub = sinon.stub(element, '_changeUrlParams');
+
+    await element.updateComplete;
+
+    const dropdownRows = element.shadowRoot.querySelector('.row-selector');
+
+    dropdownRows.selection = 'Status';
+    dropdownRows.dispatchEvent(new Event('change'));
+    sinon.assert.calledWith(stub, {y: 'Status'});
+  });
+
+  it('setting row to None deletes y param', async () => {
+    element.queryParams = {y: 'Remove', x: 'Keep'};
+    element.projectName = 'chromium';
+
+    await element.updateComplete;
+
+    const dropdownRows = element.shadowRoot.querySelector('.row-selector');
+
+    dropdownRows.selection = 'None';
+    dropdownRows.dispatchEvent(new Event('change'));
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?x=Keep');
+  });
+
+  it('selecting col updates x param', async () => {
+    const stub = sinon.stub(element, '_changeUrlParams');
+    await element.updateComplete;
+
+    const dropdownCols = element.shadowRoot.querySelector('.col-selector');
+
+    dropdownCols.selection = 'Blocking';
+    dropdownCols.dispatchEvent(new Event('change'));
+    sinon.assert.calledWith(stub, {x: 'Blocking'});
+  });
+
+  it('setting col to None deletes x param', async () => {
+    element.queryParams = {y: 'Keep', x: 'Remove'};
+    element.projectName = 'chromium';
+
+    await element.updateComplete;
+
+    const dropdownCols = element.shadowRoot.querySelector('.col-selector');
+
+    dropdownCols.selection = 'None';
+    dropdownCols.dispatchEvent(new Event('change'));
+
+    sinon.assert.calledWith(element._page,
+        '/p/chromium/issues/list?y=Keep');
+  });
+
+  it('cellOptions computes URLs with queryParams and projectName', async () => {
+    element.projectName = 'chromium';
+    element.queryParams = {q: 'hello-world'};
+
+    assert.deepEqual(element.cellOptions, [
+      {text: 'Tile', value: 'tiles',
+        url: '/p/chromium/issues/list?q=hello-world'},
+      {text: 'IDs', value: 'ids',
+        url: '/p/chromium/issues/list?q=hello-world&cells=ids'},
+      {text: 'Counts', value: 'counts',
+        url: '/p/chromium/issues/list?q=hello-world&cells=counts'},
+    ]);
+  });
+
+  describe('displays appropriate messaging for issue count', () => {
+    it('for one issue', () => {
+      element.issueCount = 1;
+      assert.equal(element.totalIssuesDisplay, '1 issue shown');
+    });
+
+    it('for less than 100,000 issues', () => {
+      element.issueCount = 50;
+      assert.equal(element.totalIssuesDisplay, '50 issues shown');
+    });
+
+    it('for 100,000 issues or more', () => {
+      element.issueCount = SERVER_LIST_ISSUES_LIMIT;
+      assert.equal(element.totalIssuesDisplay, '100,000+ issues shown');
+    });
+  });
+});
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-dropdown.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-dropdown.js
new file mode 100644
index 0000000..2fc05b6
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-dropdown.js
@@ -0,0 +1,72 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {equalsIgnoreCase} from 'shared/helpers.js';
+
+/**
+ * `<mr-grid-dropdown>`
+ *
+ * Component used by the user to select what grid options to use.
+ */
+export class MrGridDropdown extends LitElement {
+  /** @override */
+  render() {
+    return html`
+      ${this.text}:
+      <select
+        class="drop-down"
+        @change=${this._optionChanged}
+      >
+        ${(this.items).map((item) => html`
+          <option .selected=${equalsIgnoreCase(item, this.selection)}>
+            ${item}
+          </option>
+        `)}
+      </select>
+      `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      text: {type: String},
+      items: {type: Array},
+      selection: {type: String},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+    this.items = [];
+    this.selection = 'None';
+  };
+
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        font-size: var(--chops-large-font-size);
+      }
+      .drop-down {
+        font-size: var(--chops-large-font-size);
+      }
+    `;
+  };
+
+  /**
+   * Syncs values when the user updates their selection.
+   * @param {Event} e
+   * @fires CustomEvent#change
+   * @private
+   */
+  _optionChanged(e) {
+    this.selection = e.target.value;
+    this.dispatchEvent(new CustomEvent('change'));
+  };
+};
+
+customElements.define('mr-grid-dropdown', MrGridDropdown);
+
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-dropdown.test.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-dropdown.test.js
new file mode 100644
index 0000000..fcd480d
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-dropdown.test.js
@@ -0,0 +1,22 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {assert} from 'chai';
+import {MrGridDropdown} from './mr-grid-dropdown.js';
+
+let element;
+
+describe('mr-grid-dropdown', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-grid-dropdown');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrGridDropdown);
+  });
+});
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-page.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-page.js
new file mode 100644
index 0000000..d96e566
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-page.js
@@ -0,0 +1,180 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// TODO(juliacordero): Handle pRPC errors with a FE page
+
+import {LitElement, html, css} from 'lit-element';
+import {store, connectStore} from 'reducers/base.js';
+import {shouldWaitForDefaultQuery} from 'shared/helpers.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import 'elements/framework/links/mr-issue-link/mr-issue-link.js';
+import './mr-grid-controls.js';
+import './mr-grid.js';
+
+/**
+ * <mr-grid-page>
+ *
+ * Grid page view containing mr-grid and mr-grid-controls.
+ * @extends {LitElement}
+ */
+export class MrGridPage extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    const displayedProgress = this.progress || 0.02;
+    const doneLoading = this.progress === 1;
+    const noMatches = this.totalIssues === 0 && doneLoading;
+    return html`
+      <div id="grid-area">
+        <mr-grid-controls
+          .projectName=${this.projectName}
+          .queryParams=${this._queryParams}
+          .issueCount=${this.issues.length}>
+        </mr-grid-controls>
+        ${noMatches ? html`
+          <div class="empty-search">
+            Your search did not generate any results.
+          </div>` : html`
+          <progress
+            title="${Math.round(displayedProgress * 100)}%"
+            value=${displayedProgress}
+            ?hidden=${doneLoading}
+          ></progress>`}
+        <br>
+        <mr-grid
+          .issues=${this.issues}
+          .xField=${this._queryParams.x}
+          .yField=${this._queryParams.y}
+          .cellMode=${this._queryParams.cells ? this._queryParams.cells : 'tiles'}
+          .queryParams=${this._queryParams}
+          .projectName=${this.projectName}
+        ></mr-grid>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      projectName: {type: String},
+      _queryParams: {type: Object},
+      userDisplayName: {type: String},
+      issues: {type: Array},
+      fields: {type: Array},
+      progress: {type: Number},
+      totalIssues: {type: Number},
+      _presentationConfigLoaded: {type: Boolean},
+      /**
+       * The current search string the user is querying for.
+       * Project default if not specified.
+       */
+      _currentQuery: {type: String},
+      /**
+       * The current canned query the user is searching for.
+       * Project default if not specified.
+       */
+      _currentCan: {type: String},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+    this.issues = [];
+    this.progress = 0;
+    /** @type {string} */
+    this.projectName;
+    this._queryParams = {};
+    this._presentationConfigLoaded = false;
+  };
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('userDisplayName')) {
+      store.dispatch(issueV0.fetchStarredIssues());
+    }
+    // TODO(zosha): Abort sets of calls to ListIssues when
+    // queryParams.q is changed.
+    if (this._shouldFetchMatchingIssues(changedProperties)) {
+      this._fetchMatchingIssues();
+    }
+  }
+
+  /**
+   * Computes whether to fetch matching issues based on changedProperties
+   * @param {Map} changedProperties
+   * @return {boolean}
+   */
+  _shouldFetchMatchingIssues(changedProperties) {
+    const wait = shouldWaitForDefaultQuery(this._queryParams);
+    if (wait && !this._presentationConfigLoaded) {
+      return false;
+    } else if (wait && this._presentationConfigLoaded &&
+        changedProperties.has('_presentationConfigLoaded')) {
+      return true;
+    } else if (changedProperties.has('projectName') ||
+        changedProperties.has('_currentQuery') ||
+        changedProperties.has('_currentCan')) {
+      return true;
+    }
+    return false;
+  }
+
+  /** @private */
+  _fetchMatchingIssues() {
+    store.dispatch(issueV0.fetchIssueList(this.projectName, {
+      ...this._queryParams,
+      q: this._currentQuery,
+      can: this._currentCan,
+      maxItems: 500, // 500 items * 12 calls = max of 6,000 issues.
+      maxCalls: 12,
+    }));
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.projectName = projectV0.viewedProjectName(state);
+    this.issues = (issueV0.issueList(state) || []);
+    this.progress = (issueV0.issueListProgress(state) || 0);
+    this.totalIssues = (issueV0.totalIssues(state) || 0);
+    this._queryParams = sitewide.queryParams(state);
+    this._currentQuery = sitewide.currentQuery(state);
+    this._currentCan = sitewide.currentCan(state);
+    this._presentationConfigLoaded =
+      projectV0.viewedPresentationConfigLoaded(state);
+  }
+
+  /** @override */
+  static get styles() {
+    return css `
+      :host {
+        display: block;
+        box-sizing: border-box;
+        width: 100%;
+        padding: 0.5em 8px;
+      }
+      progress {
+        background-color: var(--chops-white);
+        border: 1px solid var(--chops-gray-500);
+        width: 40%;
+        margin-left: 1%;
+        margin-top: 0.5em;
+        visibility: visible;
+      }
+      ::-webkit-progress-bar {
+        background-color: var(--chops-white);
+      }
+      progress::-webkit-progress-value {
+        transition: width 1s;
+        background-color: var(--chops-blue-700);
+      }
+      .empty-search {
+        text-align: center;
+        padding-top: 2em;
+      }
+    `;
+  }
+};
+customElements.define('mr-grid-page', MrGridPage);
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-page.test.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-page.test.js
new file mode 100644
index 0000000..241091b
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-page.test.js
@@ -0,0 +1,126 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrGridPage} from './mr-grid-page.js';
+
+let element;
+
+describe('mr-grid-page', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-grid-page');
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrGridPage);
+  });
+
+  it('progress bar updates properly', async () => {
+    await element.updateComplete;
+    element.progress = .2499;
+    await element.updateComplete;
+    const title =
+      element.shadowRoot.querySelector('progress').getAttribute('title');
+    assert.equal(title, '25%');
+  });
+
+  it('displays error when no issues match query', async () => {
+    await element.updateComplete;
+    element.progress = 1;
+    element.totalIssues = 0;
+    await element.updateComplete;
+    const error =
+      element.shadowRoot.querySelector('.empty-search').textContent;
+    assert.equal(error.trim(), 'Your search did not generate any results.');
+  });
+
+  it('calls to fetchIssueList made when _currentQuery changes', async () => {
+    await element.updateComplete;
+    const issueListCall = sinon.stub(element, '_fetchMatchingIssues');
+    element._queryParams = {x: 'Blocked'};
+    await element.updateComplete;
+    sinon.assert.notCalled(issueListCall);
+
+    element._presentationConfigLoaded = true;
+    element._currentQuery = 'cc:me';
+    await element.updateComplete;
+    sinon.assert.calledOnce(issueListCall);
+  });
+
+  it('calls to fetchIssueList made when _currentCan changes', async () => {
+    await element.updateComplete;
+    const issueListCall = sinon.stub(element, '_fetchMatchingIssues');
+    element._queryParams = {y: 'Blocked'};
+    await element.updateComplete;
+    sinon.assert.notCalled(issueListCall);
+
+    element._presentationConfigLoaded = true;
+    element._currentCan = 1;
+    await element.updateComplete;
+    sinon.assert.calledOnce(issueListCall);
+  });
+
+  describe('_shouldFetchMatchingIssues', () => {
+    it('default returns false', () => {
+      const result = element._shouldFetchMatchingIssues(new Map());
+      assert.isFalse(result);
+    });
+
+    it('returns true for projectName', () => {
+      element._queryParams = {q: ''};
+      const changedProps = new Map();
+      changedProps.set('projectName', 'anything');
+      const result = element._shouldFetchMatchingIssues(changedProps);
+      assert.isTrue(result);
+    });
+
+    it('returns true when _currentQuery changes', () => {
+      element._presentationConfigLoaded = true;
+
+      element._currentQuery = 'owner:me';
+      const changedProps = new Map();
+      changedProps.set('_currentQuery', '');
+
+      const result = element._shouldFetchMatchingIssues(changedProps);
+      assert.isTrue(result);
+    });
+
+    it('returns true when _currentCan changes', () => {
+      element._presentationConfigLoaded = true;
+
+      element._currentCan = 1;
+      const changedProps = new Map();
+      changedProps.set('_currentCan', 2);
+
+      const result = element._shouldFetchMatchingIssues(changedProps);
+      assert.isTrue(result);
+    });
+
+    it('returns false when presentation config not loaded', () => {
+      element._presentationConfigLoaded = false;
+
+      const changedProps = new Map();
+      changedProps.set('projectName', 'anything');
+      const result = element._shouldFetchMatchingIssues(changedProps);
+
+      assert.isFalse(result);
+    });
+
+    it('returns true when presentationConfig fetch completes', () => {
+      element._presentationConfigLoaded = true;
+
+      const changedProps = new Map();
+      changedProps.set('_presentationConfigLoaded', false);
+      const result = element._shouldFetchMatchingIssues(changedProps);
+
+      assert.isTrue(result);
+    });
+  });
+});
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-tile.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-tile.js
new file mode 100644
index 0000000..57ee474
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-tile.js
@@ -0,0 +1,114 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {issueRefToUrl, issueToIssueRef} from 'shared/convertersV0.js';
+import '../../framework/mr-star/mr-issue-star.js';
+
+/**
+ * Element for rendering a single tile in the grid view.
+ */
+export class MrGridTile extends LitElement {
+  /** @override */
+  render() {
+    return html`
+      <div class="tile-header">
+        <mr-issue-star
+          .issueRef=${this.issueRef}
+        ></mr-issue-star>
+        <a class="issue-id" href=${issueRefToUrl(this.issue, this.queryParams)}>
+          ${this.issue.localId}
+        </a>
+        <div class="status">
+          ${this.issue.statusRef ? this.issue.statusRef.status : ''}
+        </div>
+      </div>
+      <div class="summary">
+        ${this.issue.summary || ''}
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issue: {type: Object},
+      issueRef: {type: Object},
+      queryParams: {type: Object},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+    this.issue = {};
+    this.queryParams = '';
+  };
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('issue')) {
+      this.issueRef = issueToIssueRef(this.issue);
+    }
+    super.update(changedProperties);
+  }
+
+  /** @override */
+  static get styles() {
+    return css`
+      :host {
+        display: block;
+        border: 2px solid var(--chops-gray-200);
+        border-radius: 6px;
+        padding: 1px;
+        margin: 3px;
+        background: var(--chops-white);
+        width: 10em;
+        height: 5em;
+        float: left;
+        table-layout: fixed;
+        overflow: hidden;
+      }
+      :host(:hover) {
+        border-color: var(--chops-blue-100);
+      }
+      .tile-header {
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        width: 100%;
+        margin-bottom: 0.1em;
+      }
+      mr-issue-star {
+        --mr-star-size: 16px;
+      }
+      a.issue-id {
+        font-weight: 500;
+        text-decoration: none;
+        display: inline-block;
+        padding-left: .25em;
+        color: var(--chops-blue-700);
+      }
+      .status {
+        display: inline-block;
+        font-size: 90%;
+        max-width: 30%;
+        white-space: nowrap;
+        padding-left: 4px;
+      }
+      .summary {
+        height: 3.7em;
+        font-size: 90%;
+        line-height: 94%;
+        padding: .05px .25em .05px .25em;
+        position: relative;
+      }
+      a:hover {
+        text-decoration: underline;
+      }
+    `;
+  };
+};
+
+customElements.define('mr-grid-tile', MrGridTile);
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid-tile.test.js b/static_src/elements/issue-list/mr-grid-page/mr-grid-tile.test.js
new file mode 100644
index 0000000..c9577c6
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid-tile.test.js
@@ -0,0 +1,56 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {assert} from 'chai';
+import {MrGridTile} from './mr-grid-tile.js';
+
+let element;
+const summary = 'Testing summary of an issue.';
+const testIssue = {
+  projectName: 'Monorail',
+  localId: '2345',
+  summary: summary,
+};
+
+describe('mr-grid-tile', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-grid-tile');
+    element.issue = testIssue;
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrGridTile);
+  });
+
+  it('properly links', async () => {
+    await element.updateComplete;
+    const tileLink = element.shadowRoot.querySelector('a').getAttribute('href');
+    assert.equal(tileLink, `/p/Monorail/issues/detail?id=2345`);
+  });
+
+  it('summary displays', async () => {
+    await element.updateComplete;
+    const tileSummary =
+      element.shadowRoot.querySelector('.summary').textContent;
+    assert.equal(tileSummary.trim(), summary);
+  });
+
+  it('status displays', async () => {
+    await element.updateComplete;
+    const tileStatus =
+      element.shadowRoot.querySelector('.status').textContent;
+    assert.equal(tileStatus.trim(), '');
+  });
+
+  it('id displays', async () => {
+    await element.updateComplete;
+    const tileId =
+      element.shadowRoot.querySelector('.issue-id').textContent;
+    assert.equal(tileId.trim(), '2345');
+  });
+});
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid.js b/static_src/elements/issue-list/mr-grid-page/mr-grid.js
new file mode 100644
index 0000000..f459489
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid.js
@@ -0,0 +1,291 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import './mr-grid-tile.js';
+
+import {css, html, LitElement} from 'lit-element';
+import qs from 'qs';
+import {connectStore} from 'reducers/base.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import {issueRefToUrl} from 'shared/convertersV0.js';
+import {setHasAny} from 'shared/helpers.js';
+import {EMPTY_FIELD_VALUE} from 'shared/issue-fields.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+import {extractGridData, makeGridCellKey} from './extract-grid-data.js';
+
+const PROPERTIES_TRIGGERING_GROUPING = Object.freeze([
+  'xField',
+  'yField',
+  'issues',
+  '_extractFieldValuesFromIssue',
+  '_extractTypeForFieldName',
+  '_statusDefs',
+]);
+
+/**
+ * <mr-grid>
+ *
+ * A grid of issues grouped optionally horizontally and vertically.
+ *
+ * Throughout the file 'x' corresponds to column headers and 'y' corresponds to
+ * row headers.
+ *
+ * @extends {LitElement}
+ */
+export class MrGrid extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    return html`
+      <table>
+        <tr>
+          <th>&nbsp</th>
+          ${this._xHeadings.map((heading) => html`
+              <th>${heading}</th>`)}
+        </tr>
+        ${this._yHeadings.map((yHeading) => html`
+          <tr>
+            <th>${yHeading}</th>
+            ${this._xHeadings.map((xHeading) => html`
+                ${this._renderCell(xHeading, yHeading)}`)}
+          </tr>
+        `)}
+      </table>
+    `;
+  }
+  /**
+   *
+   * @param {string} xHeading
+   * @param {string} yHeading
+   * @return {TemplateResult}
+   */
+  _renderCell(xHeading, yHeading) {
+    const cell = this._groupedIssues.get(makeGridCellKey(xHeading, yHeading));
+    if (!cell) {
+      return html`<td></td>`;
+    }
+
+    const cellMode = this.cellMode.toLowerCase();
+    let content;
+    if (cellMode === 'ids') {
+      content = html`
+        ${cell.map((issue) => html`
+          <mr-issue-link
+            .projectName=${this.projectName}
+            .issue=${issue}
+            .text=${issue.localId}
+            .queryParams=${this.queryParams}
+          ></mr-issue-link>
+        `)}
+      `;
+    } else if (cellMode === 'counts') {
+      const itemCount = cell.length;
+      if (itemCount === 1) {
+        const issue = cell[0];
+        content = html`
+          <a href=${issueRefToUrl(issue, this.queryParams)} class="counts">
+            1 item
+          </a>
+        `;
+      } else {
+        content = html`
+          <a href=${this._formatListUrl(xHeading, yHeading)} class="counts">
+            ${itemCount} items
+          </a>
+        `;
+      }
+    } else {
+      // Default to tiles.
+      content = html`
+        ${cell.map((issue) => html`
+          <mr-grid-tile
+            .issue=${issue}
+            .queryParams=${this.queryParams}
+          ></mr-grid-tile>
+          `)}
+        `;
+    }
+    return html`<td>${content}</td>`;
+  }
+
+  /**
+   * Creates a URL to the list view for the group of issues corresponding to
+   * the given headings.
+   *
+   * @param {string} xHeading
+   * @param {string} yHeading
+   * @return {string}
+   */
+  _formatListUrl(xHeading, yHeading) {
+    let url = 'list?';
+    const params = Object.assign({}, this.queryParams);
+    params.mode = '';
+
+    params.q = this._addHeadingToQuery(params.q, xHeading, this.xField);
+    params.q = this._addHeadingToQuery(params.q, yHeading, this.yField);
+
+    url += qs.stringify(params);
+
+    return url;
+  }
+
+  /**
+   * @param {string} query
+   * @param {string} heading The value of field for the current group.
+   * @param {string} field Field on which we're grouping the issue.
+   * @return {string} The query with an additional clause if needed.
+   */
+  _addHeadingToQuery(query, heading, field) {
+    if (field && field !== 'None') {
+      if (heading === EMPTY_FIELD_VALUE) {
+        query += ' -has:' + field;
+      // The following two cases are to handle grouping issues by Blocked
+      } else if (heading === 'No') {
+        query += ' -is:' + field;
+      } else if (heading === 'Yes') {
+        query += ' is:' + field;
+      } else {
+        query += ' ' + field + '=' + heading;
+      }
+    }
+    return query;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      xField: {type: String},
+      yField: {type: String},
+      issues: {type: Array},
+      cellMode: {type: String},
+      queryParams: {type: Object},
+      projectName: {type: String},
+      _extractFieldValuesFromIssue: {type: Object},
+      _extractTypeForFieldName: {type: Object},
+      _statusDefs: {type: Array},
+      _labelPrefixValueMap: {type: Map},
+    };
+  }
+
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        table {
+          table-layout: auto;
+          border-collapse: collapse;
+          width: 98%;
+          margin: 0.5em 1%;
+          text-align: left;
+        }
+        th {
+          border: 1px solid white;
+          padding: 5px;
+          background-color: var(--chops-table-header-bg);
+          white-space: nowrap;
+        }
+        td {
+          border: var(--chops-table-divider);
+          padding-left: 0.3em;
+          background-color: var(--chops-white);
+          vertical-align: top;
+        }
+        mr-issue-link {
+          display: inline-block;
+          margin-right: 8px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    /** @type {string} */
+    this.cellMode = 'tiles';
+    /** @type {Array<Issue>} */
+    this.issues = [];
+    /** @type {string} */
+    this.projectName;
+    this.queryParams = {};
+
+    /** @type {string} The issue field on which to group columns. */
+    this.xField;
+
+    /** @type {string} The issue field on which to group rows. */
+    this.yField;
+
+    /**
+     * Grid cell key mapped to issues associated with that cell.
+     * @type {Map.<string, Array<Issue>>}
+     */
+    this._groupedIssues = new Map();
+
+    /** @type {Array<string>} */
+    this._xHeadings = [];
+
+    /** @type {Array<string>} */
+    this._yHeadings = [];
+
+    /**
+     * Method for extracting values from an issue for a given
+     * project config.
+     * @type {function(Issue, string): Array<string>}
+     */
+    this._extractFieldValuesFromIssue = undefined;
+
+    /**
+     * Method for finding the types of fields based on their names.
+     * @type {function(string): string}
+     */
+    this._extractTypeForFieldName = undefined;
+
+    /**
+     * Note: no default assigned here: it can be undefined in stateChanged.
+     * @type {Array<StatusDef>}
+     */
+    this._statusDefs;
+
+    /**
+     * Mapping predefined label prefix to set of values
+     * @type {Map}
+     */
+    this._labelPrefixValueMap = new Map();
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._extractFieldValuesFromIssue =
+      projectV0.extractFieldValuesFromIssue(state);
+    this._extractTypeForFieldName = projectV0.extractTypeForFieldName(state);
+    this._statusDefs = projectV0.viewedConfig(state).statusDefs;
+    this._labelPrefixValueMap = projectV0.labelPrefixValueMap(state);
+  }
+
+  /** @override */
+  update(changedProperties) {
+    if (setHasAny(changedProperties, PROPERTIES_TRIGGERING_GROUPING)) {
+      if (this._extractFieldValuesFromIssue) {
+        const gridData = extractGridData({
+          issues: this.issues,
+          extractFieldValuesFromIssue: this._extractFieldValuesFromIssue,
+        }, {
+          xFieldName: this.xField,
+          yFieldName: this.yField,
+          extractTypeForFieldName: this._extractTypeForFieldName,
+          statusDefs: this._statusDefs,
+          labelPrefixValueMap: this._labelPrefixValueMap,
+        });
+
+        this._xHeadings = gridData.xHeadings;
+        this._yHeadings = gridData.yHeadings;
+        this._groupedIssues = gridData.groupedIssues;
+      }
+    }
+
+    super.update(changedProperties);
+  }
+};
+customElements.define('mr-grid', MrGrid);
diff --git a/static_src/elements/issue-list/mr-grid-page/mr-grid.test.js b/static_src/elements/issue-list/mr-grid-page/mr-grid.test.js
new file mode 100644
index 0000000..eb430de
--- /dev/null
+++ b/static_src/elements/issue-list/mr-grid-page/mr-grid.test.js
@@ -0,0 +1,214 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import {assert} from 'chai';
+import {MrGrid} from './mr-grid.js';
+import {MrIssueLink} from
+  'elements/framework/links/mr-issue-link/mr-issue-link.js';
+
+let element;
+
+describe('mr-grid', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-grid');
+    element.queryParams = {x: '', y: ''};
+    element.issues = [{localId: 1, projectName: 'monorail'}];
+    element.projectName = 'monorail';
+    document.body.appendChild(element);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrGrid);
+  });
+
+  it('renders issues in ID mode', async () => {
+    element.cellMode = 'IDs';
+
+    await element.updateComplete;
+
+    assert.instanceOf(element.shadowRoot.querySelector(
+        'mr-issue-link'), MrIssueLink);
+  });
+
+  it('renders one issue in counts mode', async () => {
+    element.cellMode = 'Counts';
+
+    await element.updateComplete;
+
+    const href = element.shadowRoot.querySelector('.counts').href;
+    assert.include(href, '/p/monorail/issues/detail?id=1&x=&y=');
+  });
+
+  it('renders as tiles when invalid cell mode set', async () => {
+    element.cellMode = 'InvalidCells';
+
+    await element.updateComplete;
+
+    const tile = element.shadowRoot.querySelector('mr-grid-tile');
+    assert.isDefined(tile);
+    assert.deepEqual(tile.issue, {localId: 1, projectName: 'monorail'});
+  });
+
+  it('groups issues before rendering', async () => {
+    const testIssue = {
+      localId: 1,
+      projectName: 'monorail',
+      starCount: 2,
+      blockedOnIssueRefs: [{localId: 22, projectName: 'chromium'}],
+    };
+
+    element.cellMode = 'Tiles';
+
+    element.issues = [testIssue];
+    element.xField = 'Stars';
+    element.yField = 'Blocked';
+
+    await element.updateComplete;
+
+    assert.deepEqual(element._groupedIssues, new Map([
+      ['2 + Yes', [testIssue]],
+    ]));
+
+    const rows = element.shadowRoot.querySelectorAll('tr');
+
+    const colHeader = rows[0].querySelectorAll('th')[1];
+    assert.equal(colHeader.textContent.trim(), '2');
+
+    const rowHeader = rows[1].querySelector('th');
+    assert.equal(rowHeader.textContent.trim(), 'Yes');
+
+    const issueCell = rows[1].querySelector('td');
+    const tile = issueCell.querySelector('mr-grid-tile');
+
+    assert.isDefined(tile);
+    assert.deepEqual(tile.issue, testIssue);
+  });
+
+  it('renders status groups in statusDef order', async () => {
+    element._statusDefs = [
+      {status: 'UltraNew'},
+      {status: 'New'},
+      {status: 'Accepted'},
+    ];
+
+    element.issues = [
+      {localId: 2, projectName: 'monorail', statusRef: {status: 'New'}},
+      {localId: 4, projectName: 'monorail', statusRef: {status: 'Accepted'}},
+      {localId: 3, projectName: 'monorail', statusRef: {status: 'New'}},
+      {localId: 1, projectName: 'monorail', statusRef: {status: 'UltraNew'}},
+    ];
+
+    element.cellMode = 'IDs';
+    element.xField = 'Status';
+    element.yField = '';
+
+    await element.updateComplete;
+
+    const rows = element.shadowRoot.querySelectorAll('tr');
+
+    const colHeaders = rows[0].querySelectorAll('th');
+    assert.equal(colHeaders[1].textContent.trim(), 'UltraNew');
+    assert.equal(colHeaders[2].textContent.trim(), 'New');
+    assert.equal(colHeaders[3].textContent.trim(), 'Accepted');
+
+    const issueCells = rows[1].querySelectorAll('td');
+
+    const ultraNewIssues = issueCells[0].querySelectorAll('mr-issue-link');
+    assert.equal(ultraNewIssues.length, 1);
+
+    const newIssues = issueCells[1].querySelectorAll('mr-issue-link');
+    assert.equal(newIssues.length, 2);
+
+    const acceptedIssues = issueCells[2].querySelectorAll('mr-issue-link');
+    assert.equal(acceptedIssues.length, 1);
+  });
+
+  it('computes href for multiple items in counts mode', async () => {
+    element.cellMode = 'Counts';
+
+    element.issues = [
+      {localId: 1, projectName: 'monorail'},
+      {localId: 2, projectName: 'monorail'},
+    ];
+
+    await element.updateComplete;
+
+    const href = element.shadowRoot.querySelector('.counts').href;
+    assert.include(href, '/list?x=&y=&mode=');
+  });
+
+  it('computes list link when grouped by row in counts mode', async () => {
+    await element.updateComplete;
+
+    element.cellMode = 'Counts';
+    element.queryParams = {x: 'Type', y: '', q: 'Type:Defect'};
+    element._xHeadings = ['All', 'Defect'];
+    element._yHeadings = ['All'];
+    element._groupedIssues = new Map([
+      ['All + All', [{'localId': 1, 'projectName': 'monorail'}]],
+      ['Defect + All', [
+        {localId: 2, projectName: 'monorail',
+          labelRefs: [{label: 'Type-Defect'}]},
+        {localId: 3, projectName: 'monorail',
+          labelRefs: [{label: 'Type-Defect'}]},
+      ]],
+    ]);
+
+    await element.updateComplete;
+
+    const href = element.shadowRoot.querySelectorAll('.counts')[1].href;
+    assert.include(href, '/list?x=Type&y=&q=Type%3ADefect&mode=');
+  });
+
+  it('computes list link when grouped by col in counts mode', async () => {
+    await element.updateComplete;
+
+    element.cellMode = 'Counts';
+    element.queryParams = {x: '', y: 'Type', q: 'Type:Defect'};
+    element._xHeadings = ['All'];
+    element._yHeadings = ['All', 'Defect'];
+    element._groupedIssues = new Map([
+      ['All + All', [{'localId': 1, 'projectName': 'monorail'}]],
+      ['All + Defect', [
+        {localId: 2, projectName: 'monorail',
+          labelRefs: [{label: 'Type-Defect'}]},
+        {localId: 3, projectName: 'monorail',
+          labelRefs: [{label: 'Type-Defect'}]},
+      ]],
+    ]);
+
+    await element.updateComplete;
+
+    const href = element.shadowRoot.querySelectorAll('.counts')[1].href;
+    assert.include(href, '/list?x=&y=Type&q=Type%3ADefect&mode=');
+  });
+
+  it('computes list link when grouped by row, col in counts mode', async () => {
+    await element.updateComplete;
+
+    element.cellMode = 'Counts';
+    element.queryParams = {x: 'Stars', y: 'Type',
+      q: 'Type:Defect Stars=2'};
+    element._xHeadings = ['All', '2'];
+    element._yHeadings = ['All', 'Defect'];
+    element._groupedIssues = new Map([
+      ['All + All', [{'localId': 1, 'projectName': 'monorail'}]],
+      ['2 + Defect', [
+        {localId: 2, projectName: 'monorail',
+          labelRefs: [{label: 'Type-Defect'}], starCount: 2},
+        {localId: 3, projectName: 'monorail',
+          labelRefs: [{label: 'Type-Defect'}], starCount: 2},
+      ]],
+    ]);
+
+    await element.updateComplete;
+
+    const href = element.shadowRoot.querySelectorAll('.counts')[1].href;
+    assert.include(href,
+        '/list?x=Stars&y=Type&q=Type%3ADefect%20Stars%3D2&mode=');
+  });
+});
diff --git a/static_src/elements/issue-list/mr-list-page/mr-list-page.js b/static_src/elements/issue-list/mr-list-page/mr-list-page.js
new file mode 100644
index 0000000..809c3fc
--- /dev/null
+++ b/static_src/elements/issue-list/mr-list-page/mr-list-page.js
@@ -0,0 +1,662 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import page from 'page';
+import qs from 'qs';
+import {store, connectStore} from 'reducers/base.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import * as userV0 from 'reducers/userV0.js';
+import * as sitewide from 'reducers/sitewide.js';
+import * as ui from 'reducers/ui.js';
+import {prpcClient} from 'prpc-client-instance.js';
+import {SERVER_LIST_ISSUES_LIMIT} from 'shared/consts/index.js';
+import {DEFAULT_ISSUE_FIELD_LIST, parseColSpec} from 'shared/issue-fields.js';
+import {
+  shouldWaitForDefaultQuery,
+  urlWithNewParams,
+  userIsMember,
+} from 'shared/helpers.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import 'elements/framework/dialogs/mr-change-columns/mr-change-columns.js';
+// eslint-disable-next-line max-len
+import 'elements/framework/dialogs/mr-issue-hotlists-action/mr-update-issue-hotlists-dialog.js';
+import 'elements/framework/mr-button-bar/mr-button-bar.js';
+import 'elements/framework/mr-dropdown/mr-dropdown.js';
+import 'elements/framework/mr-issue-list/mr-issue-list.js';
+import '../mr-mode-selector/mr-mode-selector.js';
+
+export const DEFAULT_ISSUES_PER_PAGE = 100;
+const PARAMS_THAT_TRIGGER_REFRESH = ['sort', 'groupby', 'num',
+  'start'];
+const SNACKBAR_LOADING = 'Loading issues...';
+
+/**
+ * `<mr-list-page>`
+ *
+ * Container page for the list view
+ */
+export class MrListPage extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          display: block;
+          box-sizing: border-box;
+          width: 100%;
+          padding: 0.5em 8px;
+        }
+        .container-loading,
+        .container-no-issues {
+          width: 100%;
+          box-sizing: border-box;
+          padding: 0 8px;
+          font-size: var(--chops-main-font-size);
+        }
+        .container-no-issues {
+          display: flex;
+          flex-direction: column;
+          align-items: center;
+          justify-content: center;
+        }
+        .container-no-issues p {
+          margin: 0.5em;
+        }
+        .no-issues-block {
+          display: block;
+          padding: 1em 16px;
+          margin-top: 1em;
+          flex-grow: 1;
+          width: 300px;
+          max-width: 100%;
+          text-align: center;
+          background: var(--chops-primary-accent-bg);
+          border-radius: 8px;
+          border-bottom: var(--chops-normal-border);
+        }
+        .no-issues-block[hidden] {
+          display: none;
+        }
+        .list-controls {
+          display: flex;
+          align-items: center;
+          justify-content: space-between;
+          width: 100%;
+          padding: 0.5em 0;
+        }
+        .right-controls {
+          flex-grow: 0;
+          display: flex;
+          align-items: center;
+          justify-content: flex-end;
+        }
+        .next-link, .prev-link {
+          display: inline-block;
+          margin: 0 8px;
+        }
+        mr-mode-selector {
+          margin-left: 8px;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    const selectedRefs = this.selectedIssues.map(
+        ({localId, projectName}) => ({localId, projectName}));
+
+    return html`
+      ${this._renderControls()}
+      ${this._renderListBody()}
+      <mr-update-issue-hotlists-dialog
+        .issueRefs=${selectedRefs}
+        @saveSuccess=${this._showHotlistSaveSnackbar}
+      ></mr-update-issue-hotlists-dialog>
+      <mr-change-columns
+        .columns=${this.columns}
+        .queryParams=${this._queryParams}
+      ></mr-change-columns>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderListBody() {
+    if (!this._issueListLoaded) {
+      return html`
+        <div class="container-loading">
+          Loading...
+        </div>
+      `;
+    } else if (!this.totalIssues) {
+      return html`
+        <div class="container-no-issues">
+          <p>
+            The search query:
+          </p>
+          <strong>${this._queryParams.q}</strong>
+          <p>
+            did not generate any results.
+          </p>
+          <div class="no-issues-block">
+            Type a new query in the search box above
+          </div>
+          <a
+            href=${this._urlWithNewParams({can: 2, q: ''})}
+            class="no-issues-block view-all-open"
+          >
+            View all open issues
+          </a>
+          <a
+            href=${this._urlWithNewParams({can: 1})}
+            class="no-issues-block consider-closed"
+            ?hidden=${this._queryParams.can === '1'}
+          >
+            Consider closed issues
+          </a>
+        </div>
+      `;
+    }
+
+    return html`
+      <mr-issue-list
+        .issues=${this.issues}
+        .projectName=${this.projectName}
+        .queryParams=${this._queryParams}
+        .initialCursor=${this._queryParams.cursor}
+        .currentQuery=${this.currentQuery}
+        .currentCan=${this.currentCan}
+        .columns=${this.columns}
+        .defaultFields=${DEFAULT_ISSUE_FIELD_LIST}
+        .extractFieldValues=${this._extractFieldValues}
+        .groups=${this.groups}
+        .userDisplayName=${this.userDisplayName}
+        ?selectionEnabled=${this.editingEnabled}
+        ?sortingAndGroupingEnabled=${true}
+        ?starringEnabled=${this.starringEnabled}
+        @selectionChange=${this._setSelectedIssues}
+      ></mr-issue-list>
+    `;
+  }
+
+  /**
+   * @return {TemplateResult}
+   */
+  _renderControls() {
+    const maxItems = this.maxItems;
+    const startIndex = this.startIndex;
+    const end = Math.min(startIndex + maxItems, this.totalIssues);
+    const hasNext = end < this.totalIssues;
+    const hasPrev = startIndex > 0;
+
+    return html`
+      <div class="list-controls">
+        <div>
+          ${this.editingEnabled ? html`
+            <mr-button-bar .items=${this._actions}></mr-button-bar>
+          ` : ''}
+        </div>
+
+        <div class="right-controls">
+          ${hasPrev ? html`
+            <a
+              href=${this._urlWithNewParams({start: startIndex - maxItems})}
+              class="prev-link"
+            >
+              &lsaquo; Prev
+            </a>
+          ` : ''}
+          <div class="issue-count" ?hidden=${!this.totalIssues}>
+            ${startIndex + 1} - ${end} of ${this.totalIssuesDisplay}
+          </div>
+          ${hasNext ? html`
+            <a
+              href=${this._urlWithNewParams({start: startIndex + maxItems})}
+              class="next-link"
+            >
+              Next &rsaquo;
+            </a>
+          ` : ''}
+          <mr-mode-selector
+            .projectName=${this.projectName}
+            .queryParams=${this._queryParams}
+            value="list"
+          ></mr-mode-selector>
+        </div>
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      issues: {type: Array},
+      totalIssues: {type: Number},
+      /** @private {Object} */
+      _queryParams: {type: Object},
+      projectName: {type: String},
+      _fetchingIssueList: {type: Boolean},
+      _issueListLoaded: {type: Boolean},
+      selectedIssues: {type: Array},
+      columns: {type: Array},
+      userDisplayName: {type: String},
+      /**
+       * The current search string the user is querying for.
+       */
+      currentQuery: {type: String},
+      /**
+       * The current canned query the user is searching for.
+       */
+      currentCan: {type: String},
+      /**
+       * A function that takes in an issue and a field name and returns the
+       * value for that field in the issue. This function accepts custom fields,
+       * built in fields, and ad hoc fields computed from label prefixes.
+       */
+      _extractFieldValues: {type: Object},
+      _isLoggedIn: {type: Boolean},
+      _currentUser: {type: Object},
+      _usersProjects: {type: Object},
+      _fetchIssueListError: {type: String},
+      _presentationConfigLoaded: {type: Boolean},
+    };
+  };
+
+  /** @override */
+  constructor() {
+    super();
+    this.issues = [];
+    this._fetchingIssueList = false;
+    this._issueListLoaded = false;
+    this.selectedIssues = [];
+    this._queryParams = {};
+    this.columns = [];
+    this._usersProjects = new Map();
+    this._presentationConfigLoaded = false;
+
+    this._boundRefresh = this.refresh.bind(this);
+
+    this._actions = [
+      {icon: 'edit', text: 'Bulk edit', handler: this.bulkEdit.bind(this)},
+      {
+        icon: 'add', text: 'Add to hotlist',
+        handler: this.addToHotlist.bind(this),
+      },
+      {
+        icon: 'table_chart', text: 'Change columns',
+        handler: this.openColumnsDialog.bind(this),
+      },
+      {icon: 'more_vert', text: 'More actions...', items: [
+        {text: 'Flag as spam', handler: () => this._flagIssues(true)},
+        {text: 'Un-flag as spam', handler: () => this._flagIssues(false)},
+      ]},
+    ];
+
+    /**
+     * @param {Issue} _issue
+     * @param {string} _fieldName
+     * @return {Array<string>}
+     */
+    this._extractFieldValues = (_issue, _fieldName) => [];
+
+    // Expose page.js for test stubbing.
+    this.page = page;
+  };
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    window.addEventListener('refreshList', this._boundRefresh);
+
+    // TODO(zhangtiff): Consider if we can make this page title more useful for
+    // the list view.
+    store.dispatch(sitewide.setPageTitle('Issues'));
+  }
+
+  /** @override */
+  disconnectedCallback() {
+    super.disconnectedCallback();
+
+    window.removeEventListener('refreshList', this._boundRefresh);
+
+    this._hideIssueLoadingSnackbar();
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    this._measureIssueListLoadTime(changedProperties);
+
+    if (changedProperties.has('_fetchingIssueList')) {
+      const wasFetching = changedProperties.get('_fetchingIssueList');
+      const isFetching = this._fetchingIssueList;
+      // Show a snackbar if waiting for issues to load but only when there's
+      // already a different, non-empty issue list loaded. This approach avoids
+      // clearing the issue list for a loading screen.
+      if (isFetching && this.totalIssues > 0) {
+        this._showIssueLoadingSnackbar();
+      }
+      if (wasFetching && !isFetching) {
+        this._hideIssueLoadingSnackbar();
+      }
+    }
+
+    if (changedProperties.has('userDisplayName')) {
+      store.dispatch(issueV0.fetchStarredIssues());
+    }
+
+    if (changedProperties.has('_fetchIssueListError') &&
+        this._fetchIssueListError) {
+      this._showIssueErrorSnackbar(this._fetchIssueListError);
+    }
+
+    const shouldRefresh = this._shouldRefresh(changedProperties);
+    if (shouldRefresh) this.refresh();
+  }
+
+  /**
+   * Tracks the start and end times of an issues list render and
+   * records an issue list load time.
+   * @param {Map} changedProperties
+  */
+  async _measureIssueListLoadTime(changedProperties) {
+    if (!changedProperties.has('issues')) {
+      return;
+    }
+
+    if (!changedProperties.get('issues')) {
+      // Ignore initial initialization from the constructer where
+      // 'issues' is set from undefined to an empty array.
+      return;
+    }
+
+    const fullAppLoad = ui.navigationCount(store.getState()) == 1;
+    const startMark = fullAppLoad ? undefined : 'start load issue list page';
+
+    await Promise.all(_subtreeUpdateComplete(this));
+
+    const endMark = 'finish load list of issues';
+    performance.mark(endMark);
+
+    const measurementType = fullAppLoad ? 'from outside app' : 'within app';
+    const measurementName = `load list of issues (${measurementType})`;
+    performance.measure(measurementName, startMark, endMark);
+
+    const measurement = performance.getEntriesByName(
+        measurementName)[0].duration;
+    window.getTSMonClient().recordIssueListLoadTiming(measurement, fullAppLoad);
+
+    // Be sure to clear this mark even on full page navigation.
+    performance.clearMarks('start load issue list page');
+    performance.clearMarks(endMark);
+    performance.clearMeasures(measurementName);
+  }
+
+  /**
+   * Considers if list-page should fetch ListIssues
+   * @param {Map} changedProperties
+   * @return {boolean}
+   */
+  _shouldRefresh(changedProperties) {
+    const wait = shouldWaitForDefaultQuery(this._queryParams);
+    if (wait && !this._presentationConfigLoaded) {
+      return false;
+    } else if (wait && this._presentationConfigLoaded &&
+        changedProperties.has('_presentationConfigLoaded')) {
+      return true;
+    } else if (changedProperties.has('projectName') ||
+          changedProperties.has('currentQuery') ||
+          changedProperties.has('currentCan')) {
+      return true;
+    } else if (changedProperties.has('_queryParams')) {
+      const oldParams = changedProperties.get('_queryParams') || {};
+
+      const shouldRefresh = PARAMS_THAT_TRIGGER_REFRESH.some((param) => {
+        const oldValue = oldParams[param];
+        const newValue = this._queryParams[param];
+        return oldValue !== newValue;
+      });
+      return shouldRefresh;
+    }
+    return false;
+  }
+
+  // TODO(crbug.com/monorail/6933): Remove the need for this wrapper.
+  /** Dispatches a Redux action to show an issues loading snackbar.  */
+  _showIssueLoadingSnackbar() {
+    store.dispatch(ui.showSnackbar(ui.snackbarNames.FETCH_ISSUE_LIST,
+        SNACKBAR_LOADING, 0));
+  }
+
+  /** Dispatches a Redux action to hide the issue loading snackbar.  */
+  _hideIssueLoadingSnackbar() {
+    store.dispatch(ui.hideSnackbar(ui.snackbarNames.FETCH_ISSUE_LIST));
+  }
+
+  /**
+   * Shows a snackbar telling the user their issue loading failed.
+   * @param {string} error The error to display.
+   */
+  _showIssueErrorSnackbar(error) {
+    store.dispatch(ui.showSnackbar(ui.snackbarNames.FETCH_ISSUE_LIST_ERROR,
+        error));
+  }
+
+  /**
+   * Refreshes the list of issues show.
+   */
+  refresh() {
+    store.dispatch(issueV0.fetchIssueList(this.projectName, {
+      ...this._queryParams,
+      q: this.currentQuery,
+      can: this.currentCan,
+      maxItems: this.maxItems,
+      start: this.startIndex,
+    }));
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.projectName = projectV0.viewedProjectName(state);
+    this._isLoggedIn = userV0.isLoggedIn(state);
+    this._currentUser = userV0.currentUser(state);
+    this._usersProjects = userV0.projectsPerUser(state);
+
+    this.issues = issueV0.issueList(state) || [];
+    this.totalIssues = issueV0.totalIssues(state) || 0;
+    this._fetchingIssueList = issueV0.requests(state).fetchIssueList.requesting;
+    this._issueListLoaded = issueV0.issueListLoaded(state);
+
+    const error = issueV0.requests(state).fetchIssueList.error;
+    this._fetchIssueListError = error ? error.message : '';
+
+    this.currentQuery = sitewide.currentQuery(state);
+    this.currentCan = sitewide.currentCan(state);
+    this.columns =
+        sitewide.currentColumns(state) || projectV0.defaultColumns(state);
+
+    this._queryParams = sitewide.queryParams(state);
+
+    this._extractFieldValues = projectV0.extractFieldValuesFromIssue(state);
+    this._presentationConfigLoaded =
+      projectV0.viewedPresentationConfigLoaded(state);
+  }
+
+  /**
+   * @return {string} Display text of total issue number.
+   */
+  get totalIssuesDisplay() {
+    if (this.totalIssues === 1) {
+      return `${this.totalIssues}`;
+    } else if (this.totalIssues === SERVER_LIST_ISSUES_LIMIT) {
+      // Server has hard limit up to 100,000 list results
+      return `100,000+`;
+    }
+    return `${this.totalIssues}`;
+  }
+
+  /**
+   * @return {boolean} Whether the user is able to star the issues in the list.
+   */
+  get starringEnabled() {
+    return this._isLoggedIn;
+  }
+
+  /**
+   * @return {boolean} Whether the user has permissions to edit the issues in
+   *   the list.
+   */
+  get editingEnabled() {
+    return this._isLoggedIn && (userIsMember(this._currentUser,
+        this.projectName, this._usersProjects) ||
+        this._currentUser.isSiteAdmin);
+  }
+
+  /**
+   * @return {Array<string>} Array of columns to group by.
+   */
+  get groups() {
+    return parseColSpec(this._queryParams.groupby);
+  }
+
+  /**
+   * @return {number} Maximum number of issues to load for this query.
+   */
+  get maxItems() {
+    return Number.parseInt(this._queryParams.num) || DEFAULT_ISSUES_PER_PAGE;
+  }
+
+  /**
+   * @return {number} Number of issues to offset by, based on pagination.
+   */
+  get startIndex() {
+    const num = Number.parseInt(this._queryParams.start) || 0;
+    return Math.max(0, num);
+  }
+
+  /**
+   * Computes the current URL of the page with updated queryParams.
+   *
+   * @param {Object} newParams keys and values to override existing parameters.
+   * @return {string} the new URL.
+   */
+  _urlWithNewParams(newParams) {
+    const baseUrl = `/p/${this.projectName}/issues/list`;
+    return urlWithNewParams(baseUrl, this._queryParams, newParams);
+  }
+
+  /**
+   * Shows the user an alert telling them their action won't work.
+   * @param {string} action Text describing what you're trying to do.
+   */
+  noneSelectedAlert(action) {
+    // TODO(zhangtiff): Replace this with a modal for a more modern feel.
+    alert(`Please select some issues to ${action}.`);
+  }
+
+  /**
+   * Opens the the column selector.
+   */
+  openColumnsDialog() {
+    this.shadowRoot.querySelector('mr-change-columns').open();
+  }
+
+  /**
+   * Opens a modal to add the selected issues to a hotlist.
+   */
+  addToHotlist() {
+    const issues = this.selectedIssues;
+    if (!issues || !issues.length) {
+      this.noneSelectedAlert('add to hotlists');
+      return;
+    }
+    this.shadowRoot.querySelector('mr-update-issue-hotlists-dialog').open();
+  }
+
+  /**
+   * Redirects the user to the bulk edit page for the issues they've selected.
+   */
+  bulkEdit() {
+    const issues = this.selectedIssues;
+    if (!issues || !issues.length) {
+      this.noneSelectedAlert('edit');
+      return;
+    }
+    const params = {
+      ids: issues.map((issue) => issue.localId).join(','),
+      q: this._queryParams && this._queryParams.q,
+    };
+    this.page(`/p/${this.projectName}/issues/bulkedit?${qs.stringify(params)}`);
+  }
+
+  /** Shows user confirmation that their hotlist changes were saved. */
+  _showHotlistSaveSnackbar() {
+    store.dispatch(ui.showSnackbar(ui.snackbarNames.UPDATE_HOTLISTS_SUCCESS,
+        'Hotlists updated.'));
+  }
+
+  /**
+   * Flags the selected issues as spam.
+   * @param {boolean} flagAsSpam If true, flag as spam. If false, unflag
+   *   as spam.
+   */
+  async _flagIssues(flagAsSpam = true) {
+    const issues = this.selectedIssues;
+    if (!issues || !issues.length) {
+      return this.noneSelectedAlert(
+          `${flagAsSpam ? 'flag' : 'un-flag'} as spam`);
+    }
+    const refs = issues.map((issue) => ({
+      localId: issue.localId,
+      projectName: issue.projectName,
+    }));
+
+    // TODO(zhangtiff): Refactor this into a shared action creator and
+    // display the error on the frontend.
+    try {
+      await prpcClient.call('monorail.Issues', 'FlagIssues', {
+        issueRefs: refs,
+        flag: flagAsSpam,
+      });
+      this.refresh();
+    } catch (e) {
+      console.error(e);
+    }
+  }
+
+  /**
+   * Syncs this component's selected issues with the child component's selected
+   * issues.
+   */
+  _setSelectedIssues() {
+    const issueListRef = this.shadowRoot.querySelector('mr-issue-list');
+    if (!issueListRef) return;
+
+    this.selectedIssues = issueListRef.selectedIssues;
+  }
+};
+
+
+/**
+ * Recursively traverses all shadow DOMs in an element subtree and returns an
+ * Array containing the updateComplete Promises for all lit-element nodes.
+ * @param {!LitElement} element
+ * @return {!Array<Promise<Boolean>>}
+ */
+function _subtreeUpdateComplete(element) {
+  if (!(element.shadowRoot && element.updateComplete)) {
+    return [];
+  }
+
+  const children = element.shadowRoot.querySelectorAll('*');
+  const childPromises = Array.from(children, (e) => _subtreeUpdateComplete(e));
+  return [element.updateComplete].concat(...childPromises);
+}
+
+customElements.define('mr-list-page', MrListPage);
diff --git a/static_src/elements/issue-list/mr-list-page/mr-list-page.test.js b/static_src/elements/issue-list/mr-list-page/mr-list-page.test.js
new file mode 100644
index 0000000..0f1d4ac
--- /dev/null
+++ b/static_src/elements/issue-list/mr-list-page/mr-list-page.test.js
@@ -0,0 +1,615 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import sinon from 'sinon';
+import {assert} from 'chai';
+import {prpcClient} from 'prpc-client-instance.js';
+import {MrListPage, DEFAULT_ISSUES_PER_PAGE} from './mr-list-page.js';
+import {SERVER_LIST_ISSUES_LIMIT} from 'shared/consts/index.js';
+import {store, resetState} from 'reducers/base.js';
+
+let element;
+
+describe('mr-list-page', () => {
+  beforeEach(() => {
+    store.dispatch(resetState());
+    element = document.createElement('mr-list-page');
+    document.body.appendChild(element);
+    sinon.stub(prpcClient, 'call');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+    prpcClient.call.restore();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrListPage);
+  });
+
+  it('shows loading page when issues not loaded yet', async () => {
+    element._issueListLoaded = false;
+
+    await element.updateComplete;
+
+    const loading = element.shadowRoot.querySelector('.container-loading');
+    const noIssues = element.shadowRoot.querySelector('.container-no-issues');
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+
+    assert.equal(loading.textContent.trim(), 'Loading...');
+    assert.isNull(noIssues);
+    assert.isNull(issueList);
+  });
+
+  it('does not clear existing issue list when loading new issues', async () => {
+    element._fetchingIssueList = true;
+    element._issueListLoaded = true;
+
+    element.totalIssues = 1;
+    element.issues = [{localId: 1, projectName: 'chromium'}];
+
+    await element.updateComplete;
+
+    const loading = element.shadowRoot.querySelector('.container-loading');
+    const noIssues = element.shadowRoot.querySelector('.container-no-issues');
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+
+    assert.isNull(loading);
+    assert.isNull(noIssues);
+    assert.isNotNull(issueList);
+    // TODO(crbug.com/monorail/6560): We intend for the snackbar to be shown,
+    // but it is hidden because the store thinks we have 0 total issues.
+  });
+
+  it('shows list when done loading', async () => {
+    element._fetchingIssueList = false;
+    element._issueListLoaded = true;
+
+    element.totalIssues = 100;
+
+    await element.updateComplete;
+
+    const loading = element.shadowRoot.querySelector('.container-loading');
+    const noIssues = element.shadowRoot.querySelector('.container-no-issues');
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+
+    assert.isNull(loading);
+    assert.isNull(noIssues);
+    assert.isNotNull(issueList);
+  });
+
+  describe('issue loading snackbar', () => {
+    beforeEach(() => {
+      sinon.spy(store, 'dispatch');
+    });
+
+    afterEach(() => {
+      store.dispatch.restore();
+    });
+
+    it('shows snackbar when loading new list of issues', async () => {
+      sinon.stub(element, 'stateChanged');
+      sinon.stub(element, '_showIssueLoadingSnackbar');
+
+      element._fetchingIssueList = true;
+      element.totalIssues = 1;
+      element.issues = [{localId: 1, projectName: 'chromium'}];
+
+      await element.updateComplete;
+
+      sinon.assert.calledOnce(element._showIssueLoadingSnackbar);
+    });
+
+    it('hides snackbar when issues are done loading', async () => {
+      element._fetchingIssueList = true;
+      element.totalIssues = 1;
+      element.issues = [{localId: 1, projectName: 'chromium'}];
+
+      await element.updateComplete;
+
+      sinon.assert.neverCalledWith(store.dispatch,
+          {type: 'HIDE_SNACKBAR', id: 'FETCH_ISSUE_LIST'});
+
+      element._fetchingIssueList = false;
+
+      await element.updateComplete;
+
+      sinon.assert.calledWith(store.dispatch,
+          {type: 'HIDE_SNACKBAR', id: 'FETCH_ISSUE_LIST'});
+    });
+
+    it('hides snackbar when <mr-list-page> disconnects', async () => {
+      document.body.removeChild(element);
+
+      sinon.assert.calledWith(store.dispatch,
+          {type: 'HIDE_SNACKBAR', id: 'FETCH_ISSUE_LIST'});
+
+      document.body.appendChild(element);
+    });
+
+    it('shows snackbar on issue loading error', async () => {
+      sinon.stub(element, 'stateChanged');
+      sinon.stub(element, '_showIssueErrorSnackbar');
+
+      element._fetchIssueListError = 'Something went wrong';
+
+      await element.updateComplete;
+
+      sinon.assert.calledWith(element._showIssueErrorSnackbar,
+          'Something went wrong');
+    });
+  });
+
+  it('shows no issues when no search results', async () => {
+    element._fetchingIssueList = false;
+    element._issueListLoaded = true;
+
+    element.totalIssues = 0;
+    element._queryParams = {q: 'owner:me'};
+
+    await element.updateComplete;
+
+    const loading = element.shadowRoot.querySelector('.container-loading');
+    const noIssues = element.shadowRoot.querySelector('.container-no-issues');
+    const issueList = element.shadowRoot.querySelector('mr-issue-list');
+
+    assert.isNull(loading);
+    assert.isNotNull(noIssues);
+    assert.isNull(issueList);
+
+    assert.equal(noIssues.querySelector('strong').textContent.trim(),
+        'owner:me');
+  });
+
+  it('offers consider closed issues when no open results', async () => {
+    element._fetchingIssueList = false;
+    element._issueListLoaded = true;
+
+    element.totalIssues = 0;
+    element._queryParams = {q: 'owner:me', can: '2'};
+
+    await element.updateComplete;
+
+    const considerClosed = element.shadowRoot.querySelector('.consider-closed');
+
+    assert.isFalse(considerClosed.hidden);
+
+    element._queryParams = {q: 'owner:me', can: '1'};
+    element._fetchingIssueList = false;
+    element._issueListLoaded = true;
+
+    await element.updateComplete;
+
+    assert.isTrue(considerClosed.hidden);
+  });
+
+  it('refreshes when _queryParams.sort changes', async () => {
+    sinon.stub(element, 'refresh');
+
+    element._queryParams = {q: ''};
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 1);
+
+    element._queryParams = {q: '', colspec: 'Summary+ID'};
+
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 1);
+
+    element._queryParams = {q: '', sort: '-Summary'};
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 2);
+
+    element.refresh.restore();
+  });
+
+  it('refreshes when currentQuery changes', async () => {
+    sinon.stub(element, 'refresh');
+
+    element._queryParams = {q: ''};
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 1);
+
+    element.currentQuery = 'some query term';
+
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 2);
+
+    element.refresh.restore();
+  });
+
+  it('does not refresh when presentation config not fetched', async () => {
+    sinon.stub(element, 'refresh');
+
+    element._presentationConfigLoaded = false;
+    element.currentQuery = 'some query term';
+
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 0);
+
+    element.refresh.restore();
+  });
+
+  it('refreshes if presentation config fetch finishes last', async () => {
+    sinon.stub(element, 'refresh');
+
+    element._presentationConfigLoaded = false;
+
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 0);
+
+    element._presentationConfigLoaded = true;
+    element.currentQuery = 'some query term';
+
+    await element.updateComplete;
+    sinon.assert.callCount(element.refresh, 1);
+
+    element.refresh.restore();
+  });
+
+  it('startIndex parses _queryParams for value', () => {
+    // Default value.
+    element._queryParams = {};
+    assert.equal(element.startIndex, 0);
+
+    // Int.
+    element._queryParams = {start: 2};
+    assert.equal(element.startIndex, 2);
+
+    // String.
+    element._queryParams = {start: '5'};
+    assert.equal(element.startIndex, 5);
+
+    // Negative value.
+    element._queryParams = {start: -5};
+    assert.equal(element.startIndex, 0);
+
+    // NaN
+    element._queryParams = {start: 'lol'};
+    assert.equal(element.startIndex, 0);
+  });
+
+  it('maxItems parses _queryParams for value', () => {
+    // Default value.
+    element._queryParams = {};
+    assert.equal(element.maxItems, DEFAULT_ISSUES_PER_PAGE);
+
+    // Int.
+    element._queryParams = {num: 50};
+    assert.equal(element.maxItems, 50);
+
+    // String.
+    element._queryParams = {num: '33'};
+    assert.equal(element.maxItems, 33);
+
+    // NaN
+    element._queryParams = {num: 'lol'};
+    assert.equal(element.maxItems, DEFAULT_ISSUES_PER_PAGE);
+  });
+
+  it('parses groupby parameter correctly', () => {
+    element._queryParams = {groupby: 'Priority+Status'};
+
+    assert.deepEqual(element.groups,
+        ['Priority', 'Status']);
+  });
+
+  it('groupby parsing preserves dashed parameters', () => {
+    element._queryParams = {groupby: 'Priority+Custom-Status'};
+
+    assert.deepEqual(element.groups,
+        ['Priority', 'Custom-Status']);
+  });
+
+  describe('pagination', () => {
+    beforeEach(() => {
+      // Stop Redux from overriding values being tested.
+      sinon.stub(element, 'stateChanged');
+    });
+
+    it('issue count hidden when no issues', async () => {
+      element._queryParams = {num: 10, start: 0};
+      element.totalIssues = 0;
+
+      await element.updateComplete;
+
+      const count = element.shadowRoot.querySelector('.issue-count');
+
+      assert.isTrue(count.hidden);
+    });
+
+    it('issue count renders on first page', async () => {
+      element._queryParams = {num: 10, start: 0};
+      element.totalIssues = 100;
+
+      await element.updateComplete;
+
+      const count = element.shadowRoot.querySelector('.issue-count');
+
+      assert.equal(count.textContent.trim(), '1 - 10 of 100');
+    });
+
+    it('issue count renders on middle page', async () => {
+      element._queryParams = {num: 10, start: 50};
+      element.totalIssues = 100;
+
+      await element.updateComplete;
+
+      const count = element.shadowRoot.querySelector('.issue-count');
+
+      assert.equal(count.textContent.trim(), '51 - 60 of 100');
+    });
+
+    it('issue count renders on last page', async () => {
+      element._queryParams = {num: 10, start: 95};
+      element.totalIssues = 100;
+
+      await element.updateComplete;
+
+      const count = element.shadowRoot.querySelector('.issue-count');
+
+      assert.equal(count.textContent.trim(), '96 - 100 of 100');
+    });
+
+    it('issue count renders on single page', async () => {
+      element._queryParams = {num: 100, start: 0};
+      element.totalIssues = 33;
+
+      await element.updateComplete;
+
+      const count = element.shadowRoot.querySelector('.issue-count');
+
+      assert.equal(count.textContent.trim(), '1 - 33 of 33');
+    });
+
+    it('total issue count shows backend limit of 100,000', () => {
+      element.totalIssues = SERVER_LIST_ISSUES_LIMIT;
+      assert.equal(element.totalIssuesDisplay, '100,000+');
+    });
+
+    it('next and prev hidden on single page', async () => {
+      element._queryParams = {num: 500, start: 0};
+      element.totalIssues = 10;
+
+      await element.updateComplete;
+
+      const next = element.shadowRoot.querySelector('.next-link');
+      const prev = element.shadowRoot.querySelector('.prev-link');
+
+      assert.isNull(next);
+      assert.isNull(prev);
+    });
+
+    it('prev hidden on first page', async () => {
+      element._queryParams = {num: 10, start: 0};
+      element.totalIssues = 30;
+
+      await element.updateComplete;
+
+      const next = element.shadowRoot.querySelector('.next-link');
+      const prev = element.shadowRoot.querySelector('.prev-link');
+
+      assert.isNotNull(next);
+      assert.isNull(prev);
+    });
+
+    it('next hidden on last page', async () => {
+      element._queryParams = {num: 10, start: 9};
+      element.totalIssues = 5;
+
+      await element.updateComplete;
+
+      const next = element.shadowRoot.querySelector('.next-link');
+      const prev = element.shadowRoot.querySelector('.prev-link');
+
+      assert.isNull(next);
+      assert.isNotNull(prev);
+    });
+
+    it('next and prev shown on middle page', async () => {
+      element._queryParams = {num: 10, start: 50};
+      element.totalIssues = 100;
+
+      await element.updateComplete;
+
+      const next = element.shadowRoot.querySelector('.next-link');
+      const prev = element.shadowRoot.querySelector('.prev-link');
+
+      assert.isNotNull(next);
+      assert.isNotNull(prev);
+    });
+  });
+
+  describe('edit actions', () => {
+    beforeEach(() => {
+      sinon.stub(window, 'alert');
+
+      // Give the test user edit privileges.
+      element._isLoggedIn = true;
+      element._currentUser = {isSiteAdmin: true};
+    });
+
+    afterEach(() => {
+      window.alert.restore();
+    });
+
+    it('edit actions hidden when user is logged out', async () => {
+      element._isLoggedIn = false;
+
+      await element.updateComplete;
+
+      assert.isNull(element.shadowRoot.querySelector('mr-button-bar'));
+    });
+
+    it('edit actions hidden when user is not a project member', async () => {
+      element._isLoggedIn = true;
+      element._currentUser = {displayName: 'regular@user.com'};
+
+      await element.updateComplete;
+
+      assert.isNull(element.shadowRoot.querySelector('mr-button-bar'));
+    });
+
+    it('edit actions shown when user is a project member', async () => {
+      element.projectName = 'chromium';
+      element._isLoggedIn = true;
+      element._currentUser = {isSiteAdmin: false, userId: '123'};
+      element._usersProjects = new Map([['123', {ownerOf: ['chromium']}]]);
+
+      await element.updateComplete;
+
+      assert.isNotNull(element.shadowRoot.querySelector('mr-button-bar'));
+
+      element.projectName = 'nonmember-project';
+      await element.updateComplete;
+
+      assert.isNull(element.shadowRoot.querySelector('mr-button-bar'));
+    });
+
+    it('edit actions shown when user is a site admin', async () => {
+      element._isLoggedIn = true;
+      element._currentUser = {isSiteAdmin: true};
+
+      await element.updateComplete;
+
+      assert.isNotNull(element.shadowRoot.querySelector('mr-button-bar'));
+    });
+
+    it('bulk edit stops when no issues selected', () => {
+      element.selectedIssues = [];
+      element.projectName = 'test';
+
+      element.bulkEdit();
+
+      sinon.assert.calledWith(window.alert,
+          'Please select some issues to edit.');
+    });
+
+    it('bulk edit redirects to bulk edit page', () => {
+      element.page = sinon.stub();
+      element.selectedIssues = [
+        {localId: 1},
+        {localId: 2},
+      ];
+      element.projectName = 'test';
+
+      element.bulkEdit();
+
+      sinon.assert.calledWith(element.page,
+          '/p/test/issues/bulkedit?ids=1%2C2');
+    });
+
+    it('flag issue as spam stops when no issues selected', () => {
+      element.selectedIssues = [];
+
+      element._flagIssues(true);
+
+      sinon.assert.calledWith(window.alert,
+          'Please select some issues to flag as spam.');
+    });
+
+    it('un-flag issue as spam stops when no issues selected', () => {
+      element.selectedIssues = [];
+
+      element._flagIssues(false);
+
+      sinon.assert.calledWith(window.alert,
+          'Please select some issues to un-flag as spam.');
+    });
+
+    it('flagging issues as spam sends pRPC request', async () => {
+      element.page = sinon.stub();
+      element.selectedIssues = [
+        {localId: 1, projectName: 'test'},
+        {localId: 2, projectName: 'test'},
+      ];
+
+      await element._flagIssues(true);
+
+      sinon.assert.calledWith(prpcClient.call, 'monorail.Issues',
+          'FlagIssues', {
+            issueRefs: [
+              {localId: 1, projectName: 'test'},
+              {localId: 2, projectName: 'test'},
+            ],
+            flag: true,
+          });
+    });
+
+    it('un-flagging issues as spam sends pRPC request', async () => {
+      element.page = sinon.stub();
+      element.selectedIssues = [
+        {localId: 1, projectName: 'test'},
+        {localId: 2, projectName: 'test'},
+      ];
+
+      await element._flagIssues(false);
+
+      sinon.assert.calledWith(prpcClient.call, 'monorail.Issues',
+          'FlagIssues', {
+            issueRefs: [
+              {localId: 1, projectName: 'test'},
+              {localId: 2, projectName: 'test'},
+            ],
+            flag: false,
+          });
+    });
+
+    it('clicking change columns opens dialog', async () => {
+      await element.updateComplete;
+      const dialog = element.shadowRoot.querySelector('mr-change-columns');
+      sinon.stub(dialog, 'open');
+
+      element.openColumnsDialog();
+
+      sinon.assert.calledOnce(dialog.open);
+    });
+
+    it('add to hotlist stops when no issues selected', () => {
+      element.selectedIssues = [];
+      element.projectName = 'test';
+
+      element.addToHotlist();
+
+      sinon.assert.calledWith(window.alert,
+          'Please select some issues to add to hotlists.');
+    });
+
+    it('add to hotlist dialog opens', async () => {
+      element.selectedIssues = [
+        {localId: 1, projectName: 'test'},
+        {localId: 2, projectName: 'test'},
+      ];
+      element.projectName = 'test';
+
+      await element.updateComplete;
+
+      const dialog = element.shadowRoot.querySelector(
+          'mr-update-issue-hotlists-dialog');
+
+      sinon.stub(dialog, 'open');
+
+      element.addToHotlist();
+
+      sinon.assert.calledOnce(dialog.open);
+    });
+
+    it('hotlist update triggers snackbar', async () => {
+      element.selectedIssues = [
+        {localId: 1, projectName: 'test'},
+        {localId: 2, projectName: 'test'},
+      ];
+      element.projectName = 'test';
+      sinon.stub(element, '_showHotlistSaveSnackbar');
+
+      await element.updateComplete;
+
+      const dialog = element.shadowRoot.querySelector(
+          'mr-update-issue-hotlists-dialog');
+
+      element.addToHotlist();
+      dialog.dispatchEvent(new Event('saveSuccess'));
+
+      sinon.assert.calledOnce(element._showHotlistSaveSnackbar);
+    });
+  });
+});
diff --git a/static_src/elements/issue-list/mr-mode-selector/mr-mode-selector.js b/static_src/elements/issue-list/mr-mode-selector/mr-mode-selector.js
new file mode 100644
index 0000000..8876402
--- /dev/null
+++ b/static_src/elements/issue-list/mr-mode-selector/mr-mode-selector.js
@@ -0,0 +1,54 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+import page from 'page';
+import {ChopsChoiceButtons} from
+  'elements/chops/chops-choice-buttons/chops-choice-buttons.js';
+import {urlWithNewParams} from 'shared/helpers.js';
+
+/**
+ * Component for showing the chips to switch between List, Grid, and Chart modes
+ * on the Monorail issue list page.
+ * @extends {ChopsChoiceButtons}
+ */
+export class MrModeSelector extends ChopsChoiceButtons {
+  /** @override */
+  static get properties() {
+    return {
+      ...ChopsChoiceButtons.properties,
+      queryParams: {type: Object},
+      projectName: {type: String},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+
+    this.queryParams = {};
+    this.projectName = '';
+
+    this._page = page;
+  };
+
+  /** @override */
+  update(changedProperties) {
+    if (changedProperties.has('queryParams') ||
+        changedProperties.has('projectName')) {
+      this.options = [
+        {text: 'List', value: 'list', url: this._newListViewPath()},
+        {text: 'Grid', value: 'grid', url: this._newListViewPath('grid')},
+        {text: 'Chart', value: 'chart', url: this._newListViewPath('chart')},
+      ];
+    }
+    super.update(changedProperties);
+  }
+
+  _newListViewPath(mode) {
+    const basePath = `/p/${this.projectName}/issues/list`;
+    const deletedParams = mode ? undefined : ['mode'];
+    return urlWithNewParams(basePath, this.queryParams, {mode}, deletedParams);
+  }
+};
+
+customElements.define('mr-mode-selector', MrModeSelector);
diff --git a/static_src/elements/issue-list/mr-mode-selector/mr-mode-selector.test.js b/static_src/elements/issue-list/mr-mode-selector/mr-mode-selector.test.js
new file mode 100644
index 0000000..07166d6
--- /dev/null
+++ b/static_src/elements/issue-list/mr-mode-selector/mr-mode-selector.test.js
@@ -0,0 +1,42 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import sinon from 'sinon';
+import {assert} from 'chai';
+import {MrModeSelector} from './mr-mode-selector.js';
+
+let element;
+
+describe('mr-mode-selector', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-mode-selector');
+    document.body.appendChild(element);
+
+    element._page = sinon.stub();
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrModeSelector);
+  });
+
+  it('renders links with projectName and queryParams', async () => {
+    element.value = 'list';
+    element.projectName = 'chromium';
+    element.queryParams = {q: 'hello-world'};
+
+    await element.updateComplete;
+
+    const links = element.shadowRoot.querySelectorAll('a');
+
+    assert.include(links[0].href, '/p/chromium/issues/list?q=hello-world');
+    assert.include(links[1].href,
+        '/p/chromium/issues/list?q=hello-world&mode=grid');
+    assert.include(links[2].href,
+        '/p/chromium/issues/list?q=hello-world&mode=chart');
+  });
+});
diff --git a/static_src/elements/mr-app/mr-app.js b/static_src/elements/mr-app/mr-app.js
new file mode 100644
index 0000000..a48d40f
--- /dev/null
+++ b/static_src/elements/mr-app/mr-app.js
@@ -0,0 +1,587 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html} from 'lit-element';
+import {repeat} from 'lit-html/directives/repeat';
+import page from 'page';
+import qs from 'qs';
+
+import {getServerStatusCron} from 'shared/cron.js';
+import 'elements/framework/mr-site-banner/mr-site-banner.js';
+import {store, connectStore} from 'reducers/base.js';
+import * as projectV0 from 'reducers/projectV0.js';
+import {hotlists} from 'reducers/hotlists.js';
+import * as issueV0 from 'reducers/issueV0.js';
+import * as permissions from 'reducers/permissions.js';
+import * as users from 'reducers/users.js';
+import * as userv0 from 'reducers/userV0.js';
+import * as ui from 'reducers/ui.js';
+import * as sitewide from 'reducers/sitewide.js';
+import {arrayToEnglish} from 'shared/helpers.js';
+import {trackPageChange} from 'shared/ga-helpers.js';
+import 'elements/chops/chops-announcement/chops-announcement.js';
+import 'elements/issue-list/mr-list-page/mr-list-page.js';
+import 'elements/issue-entry/mr-issue-entry-page.js';
+import 'elements/framework/mr-header/mr-header.js';
+import 'elements/help/mr-cue/mr-cue.js';
+import {cueNames} from 'elements/help/mr-cue/cue-helpers.js';
+import 'elements/chops/chops-snackbar/chops-snackbar.js';
+
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+
+const QUERY_PARAMS_THAT_RESET_SCROLL = ['q', 'mode', 'id'];
+
+/**
+ * `<mr-app>`
+ *
+ * The container component for all pages under the Monorail SPA.
+ *
+ */
+export class MrApp extends connectStore(LitElement) {
+  /** @override */
+  render() {
+    if (this.page === 'wizard') {
+      return html`<div id="reactMount"></div>`;
+    }
+
+    return html`
+      <style>
+        ${SHARED_STYLES}
+        mr-app {
+          display: block;
+          padding-top: var(--monorail-header-height);
+          margin-top: -1px; /* Prevent a double border from showing up. */
+
+          /* From shared-styles.js. */
+          --mr-edit-field-padding: 0.125em 4px;
+          --mr-edit-field-width: 90%;
+          --mr-input-grid-gap: 6px;
+          font-family: var(--chops-font-family);
+          color: var(--chops-primary-font-color);
+          font-size: var(--chops-main-font-size);
+        }
+        main {
+          border-top: var(--chops-normal-border);
+        }
+        .snackbar-container {
+          position: fixed;
+          bottom: 1em;
+          left: 1em;
+          display: flex;
+          flex-direction: column;
+          align-items: flex-start;
+          z-index: 1000;
+        }
+        /** Unfix <chops-snackbar> to allow stacking. */
+        chops-snackbar {
+          position: static;
+          margin-top: 0.5em;
+        }
+      </style>
+      <mr-header
+        .userDisplayName=${this.userDisplayName}
+        .loginUrl=${this.loginUrl}
+        .logoutUrl=${this.logoutUrl}
+      ></mr-header>
+      <chops-announcement service="monorail"></chops-announcement>
+      <mr-site-banner></mr-site-banner>
+      <mr-cue
+        cuePrefName=${cueNames.SWITCH_TO_PARENT_ACCOUNT}
+        .loginUrl=${this.loginUrl}
+        centered
+        nondismissible
+      ></mr-cue>
+      <mr-cue
+        cuePrefName=${cueNames.SEARCH_FOR_NUMBERS}
+        centered
+      ></mr-cue>
+      <main>${this._renderPage()}</main>
+      <div class="snackbar-container" aria-live="polite">
+        ${repeat(this._snackbars, (snackbar) => html`
+          <chops-snackbar
+            @close=${this._closeSnackbar.bind(this, snackbar.id)}
+          >${snackbar.text}</chops-snackbar>
+        `)}
+      </div>
+    `;
+  }
+
+  /**
+   * @param {string} id The name of the snackbar to close.
+   */
+  _closeSnackbar(id) {
+    store.dispatch(ui.hideSnackbar(id));
+  }
+
+  /**
+   * Helper for determiing which page component to render.
+   * @return {TemplateResult}
+   */
+  _renderPage() {
+    switch (this.page) {
+      case 'detail':
+        return html`
+          <mr-issue-page
+            .userDisplayName=${this.userDisplayName}
+            .loginUrl=${this.loginUrl}
+          ></mr-issue-page>
+        `;
+      case 'entry':
+        return html`
+          <mr-issue-entry-page
+            .userDisplayName=${this.userDisplayName}
+            .loginUrl=${this.loginUrl}
+          ></mr-issue-entry-page>
+        `;
+      case 'grid':
+        return html`
+          <mr-grid-page
+            .userDisplayName=${this.userDisplayName}
+          ></mr-grid-page>
+        `;
+      case 'list':
+        return html`
+          <mr-list-page
+            .userDisplayName=${this.userDisplayName}
+          ></mr-list-page>
+        `;
+      case 'chart':
+        return html`<mr-chart-page></mr-chart-page>`;
+      case 'projects':
+        return html`<mr-projects-page></mr-projects-page>`;
+      case 'hotlist-issues':
+        return html`<mr-hotlist-issues-page></mr-hotlist-issues-page>`;
+      case 'hotlist-people':
+        return html`<mr-hotlist-people-page></mr-hotlist-people-page>`;
+      case 'hotlist-settings':
+        return html`<mr-hotlist-settings-page></mr-hotlist-settings-page>`;
+      default:
+        return;
+    }
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      /**
+       * Backend-generated URL for the page the user is directed to for login.
+       */
+      loginUrl: {type: String},
+      /**
+       * Backend-generated URL for the page the user is directed to for logout.
+       */
+      logoutUrl: {type: String},
+      /**
+       * The display name of the currently logged in user.
+       */
+      userDisplayName: {type: String},
+      /**
+       * The search parameters in the user's current URL.
+       */
+      queryParams: {type: Object},
+      /**
+       * A list of forms to check for "dirty" values when the user navigates
+       * across pages.
+       */
+      dirtyForms: {type: Array},
+      /**
+       * App Engine ID for the current version being viewed.
+       */
+      versionBase: {type: String},
+      /**
+       * A String identifier for the page that the user is viewing.
+       */
+      page: {type: String},
+      /**
+       * A String for the title of the page that the user will see in their
+       * browser tab. ie: equivalent to the <title> tag.
+       */
+      pageTitle: {type: String},
+      /**
+       * Array of snackbar objects to render.
+       */
+      _snackbars: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    this.queryParams = {};
+    this.dirtyForms = [];
+    this.userDisplayName = '';
+
+    /**
+     * @type {PageJS.Context}
+     * The context of the page. This should not be a LitElement property
+     * because we don't want to re-render when updating this.
+     */
+    this._lastContext = undefined;
+  }
+
+  /** @override */
+  createRenderRoot() {
+    return this;
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this.dirtyForms = ui.dirtyForms(state);
+    this.queryParams = sitewide.queryParams(state);
+    this.pageTitle = sitewide.pageTitle(state);
+    this._snackbars = ui.snackbars(state);
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('userDisplayName') && this.userDisplayName) {
+      // TODO(https://crbug.com/monorail/7238): Migrate userv0 calls to v3 API.
+      store.dispatch(userv0.fetch(this.userDisplayName));
+
+      // Typically we would prefer 'users/<userId>' instead.
+      store.dispatch(users.fetch(`users/${this.userDisplayName}`));
+    }
+
+    if (changedProperties.has('pageTitle')) {
+      // To ensure that changes to the page title are easy to reason about,
+      // we want to sync the current pageTitle in the Redux state to
+      // document.title in only one place in the code.
+      document.title = this.pageTitle;
+    }
+    if (changedProperties.has('page')) {
+      trackPageChange(this.page, this.userDisplayName);
+    }
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+
+    // TODO(zhangtiff): Figure out some way to save Redux state between
+    // page loads.
+
+    // page doesn't handle users reloading the page or closing a tab.
+    window.onbeforeunload = this._confirmDiscardMessage.bind(this);
+
+    // Start a cron task to periodically request the status from the server.
+    getServerStatusCron.start();
+
+    const postRouteHandler = this._postRouteHandler.bind(this);
+
+    // Populate the project route parameter before _preRouteHandler runs.
+    page('/p/:project/*', (_ctx, next) => next());
+    page('*', this._preRouteHandler.bind(this));
+
+    page('/hotlists/:hotlist', (ctx) => {
+      page.redirect(`/hotlists/${ctx.params.hotlist}/issues`);
+    });
+    page('/hotlists/:hotlist/*', this._selectHotlist);
+    page('/hotlists/:hotlist/issues',
+        this._loadHotlistIssuesPage.bind(this), postRouteHandler);
+    page('/hotlists/:hotlist/people',
+        this._loadHotlistPeoplePage.bind(this), postRouteHandler);
+    page('/hotlists/:hotlist/settings',
+        this._loadHotlistSettingsPage.bind(this), postRouteHandler);
+
+    // Handle Monorail's landing page.
+    page('/p', '/');
+    page('/projects', '/');
+    page('/hosting', '/');
+    page('/', this._loadProjectsPage.bind(this), postRouteHandler);
+
+    page('/p/:project/issues/list', this._loadListPage.bind(this),
+        postRouteHandler);
+    page('/p/:project/issues/detail', this._loadIssuePage.bind(this),
+        postRouteHandler);
+    page('/p/:project/issues/entry_new', this._loadEntryPage.bind(this),
+        postRouteHandler);
+    page('/p/:project/issues/wizard', this._loadWizardPage.bind(this),
+        postRouteHandler);
+
+    // Redirects from old hotlist pages to SPA hotlist pages.
+    const hotlistRedirect = (pageName) => async (ctx) => {
+      const name =
+          await hotlists.getHotlistName(ctx.params.user, ctx.params.hotlist);
+      page.redirect(`/${name}/${pageName}`);
+    };
+    page('/users/:user/hotlists/:hotlist', hotlistRedirect('issues'));
+    page('/users/:user/hotlists/:hotlist/people', hotlistRedirect('people'));
+    page('/users/:user/hotlists/:hotlist/details', hotlistRedirect('settings'));
+
+    page();
+  }
+
+  /**
+   * Handler that runs on every single route change, before the new page has
+   * loaded. This function should not use store.dispatch() or assign properties
+   * on this because running these actions causes extra re-renders to happen.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  _preRouteHandler(ctx, next) {
+    // We're not really navigating anywhere, so don't do anything.
+    if (this._lastContext && this._lastContext.path &&
+      ctx.path === this._lastContext.path) {
+      Object.assign(ctx, this._lastContext);
+      // Set ctx.handled to false, so we don't push the state to browser's
+      // history.
+      ctx.handled = false;
+      return;
+    }
+
+    // Check if there were forms with unsaved data before loading the next
+    // page.
+    const discardMessage = this._confirmDiscardMessage();
+    if (discardMessage && !confirm(discardMessage)) {
+      Object.assign(ctx, this._lastContext);
+      // Set ctx.handled to false, so we don't push the state to browser's
+      // history.
+      ctx.handled = false;
+      // We don't call next to avoid loading whatever page was supposed to
+      // load next.
+      return;
+    }
+
+    // Run query string parsing on all routes. Query params must be parsed
+    // before routes are loaded because some routes use them to conditionally
+    // load bundles.
+    // Based on: https://visionmedia.github.io/page.js/#plugins
+    const params = qs.parse(ctx.querystring);
+
+    // Make sure queryParams are not case sensitive.
+    const lowerCaseParams = {};
+    Object.keys(params).forEach((key) => {
+      lowerCaseParams[key.toLowerCase()] = params[key];
+    });
+    ctx.queryParams = lowerCaseParams;
+
+    this._selectProject(ctx.params.project);
+
+    next();
+  }
+
+  /**
+   * Handler that runs on every single route change, after the new page has
+   * loaded.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  _postRouteHandler(ctx, next) {
+    // Scroll to the requested element if a hash is present.
+    if (ctx.hash) {
+      store.dispatch(ui.setFocusId(ctx.hash));
+    }
+
+    // Sync queryParams to Redux after the route has loaded, rather than before,
+    // to avoid having extra queryParams update on the previously loaded
+    // component.
+    store.dispatch(sitewide.setQueryParams(ctx.queryParams));
+
+    // Increment the count of navigations in the Redux store.
+    store.dispatch(ui.incrementNavigationCount());
+
+    // Clear dirty forms when entering a new page.
+    store.dispatch(ui.clearDirtyForms());
+
+
+    if (!this._lastContext || this._lastContext.pathname !== ctx.pathname ||
+        this._hasReleventParamChanges(ctx.queryParams,
+            this._lastContext.queryParams)) {
+      // Reset the scroll position after a new page has rendered.
+      window.scrollTo(0, 0);
+    }
+
+    // Save the context of this page to be compared to later.
+    this._lastContext = ctx;
+  }
+
+  /**
+   * Finds if a route change changed query params in a way that should cause
+   * scrolling to reset.
+   * @param {Object} currentParams
+   * @param {Object} oldParams
+   * @param {Array<string>=} paramsToCompare Which params to check.
+   * @return {boolean} Whether any of the relevant query params changed.
+   */
+  _hasReleventParamChanges(currentParams, oldParams,
+      paramsToCompare = QUERY_PARAMS_THAT_RESET_SCROLL) {
+    return paramsToCompare.some((paramName) => {
+      return currentParams[paramName] !== oldParams[paramName];
+    });
+  }
+
+  /**
+   * Helper to manage syncing project route state to Redux.
+   * @param {string=} project displayName for a referenced project.
+   *   Defaults to null for consistency with Redux.
+   */
+  _selectProject(project = null) {
+    if (projectV0.viewedProjectName(store.getState()) !== project) {
+      // Note: We want to update the project even if the new project
+      // is null.
+      store.dispatch(projectV0.select(project));
+      if (project) {
+        store.dispatch(projectV0.fetch(project));
+      }
+    }
+  }
+
+  /**
+   * Loads and triggers rendering for the list of all projects.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadProjectsPage(ctx, next) {
+    await import(/* webpackChunkName: "mr-projects-page" */
+        '../projects/mr-projects-page/mr-projects-page.js');
+    this.page = 'projects';
+    next();
+  }
+
+  /**
+   * Loads and triggers render for the issue detail page.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadIssuePage(ctx, next) {
+    performance.clearMarks('start load issue detail page');
+    performance.mark('start load issue detail page');
+
+    await import(/* webpackChunkName: "mr-issue-page" */
+        '../issue-detail/mr-issue-page/mr-issue-page.js');
+
+    const issueRef = {
+      localId: Number.parseInt(ctx.queryParams.id),
+      projectName: ctx.params.project,
+    };
+    store.dispatch(issueV0.viewIssue(issueRef));
+    store.dispatch(issueV0.fetchIssuePageData(issueRef));
+    this.page = 'detail';
+    next();
+  }
+
+  /**
+   * Loads and triggers render for the issue list page, including the list,
+   * grid, and chart modes.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadListPage(ctx, next) {
+    performance.clearMarks('start load issue list page');
+    performance.mark('start load issue list page');
+    switch (ctx.queryParams && ctx.queryParams.mode &&
+        ctx.queryParams.mode.toLowerCase()) {
+      case 'grid':
+        await import(/* webpackChunkName: "mr-grid-page" */
+            '../issue-list/mr-grid-page/mr-grid-page.js');
+        this.page = 'grid';
+        break;
+      case 'chart':
+        await import(/* webpackChunkName: "mr-chart-page" */
+            '../issue-list/mr-chart-page/mr-chart-page.js');
+        this.page = 'chart';
+        break;
+      default:
+        this.page = 'list';
+        break;
+    }
+    next();
+  }
+
+  /**
+   * Load the issue entry page
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  _loadEntryPage(ctx, next) {
+    this.page = 'entry';
+    next();
+  }
+
+  /**
+   * Load the issue wizard
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadWizardPage(ctx, next) {
+    const {renderWizard} = await import(
+        /* webpackChunkName: "IssueWizard" */ '../../react/IssueWizard.tsx');
+
+    this.page = 'wizard';
+    next();
+
+    await this.updateComplete;
+
+    const mount = document.getElementById('reactMount');
+
+    renderWizard(mount);
+  }
+
+  /**
+   * Gets the currently viewed HotlistRef from the URL, selects
+   * it in the Redux store, and fetches the Hotlist data.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  _selectHotlist(ctx, next) {
+    const name = 'hotlists/' + ctx.params.hotlist;
+    store.dispatch(hotlists.select(name));
+    store.dispatch(hotlists.fetch(name));
+    store.dispatch(hotlists.fetchItems(name));
+    store.dispatch(permissions.batchGet([name]));
+    next();
+  }
+
+  /**
+   * Loads mr-hotlist-issues-page.js and makes it the currently viewed page.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadHotlistIssuesPage(ctx, next) {
+    await import(/* webpackChunkName: "mr-hotlist-issues-page" */
+        `../hotlist/mr-hotlist-issues-page/mr-hotlist-issues-page.js`);
+    this.page = 'hotlist-issues';
+    next();
+  }
+
+  /**
+   * Loads mr-hotlist-people-page.js and makes it the currently viewed page.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadHotlistPeoplePage(ctx, next) {
+    await import(/* webpackChunkName: "mr-hotlist-people-page" */
+        `../hotlist/mr-hotlist-people-page/mr-hotlist-people-page.js`);
+    this.page = 'hotlist-people';
+    next();
+  }
+
+  /**
+   * Loads mr-hotlist-settings-page.js and makes it the currently viewed page.
+   * @param {PageJS.Context} ctx A page.js Context containing routing state.
+   * @param {function} next Passes execution on to the next registered callback.
+   */
+  async _loadHotlistSettingsPage(ctx, next) {
+    await import(/* webpackChunkName: "mr-hotlist-settings-page" */
+        `../hotlist/mr-hotlist-settings-page/mr-hotlist-settings-page.js`);
+    this.page = 'hotlist-settings';
+    next();
+  }
+
+  /**
+   * Constructs a message to warn users about dirty forms when they navigate
+   * away from a page, to prevent them from loasing data.
+   * @return {string} Message shown to users to warn about in flight form
+   *   changes.
+   */
+  _confirmDiscardMessage() {
+    if (!this.dirtyForms.length) return null;
+    const dirtyFormsMessage =
+      'Discard your changes in the following forms?\n' +
+      arrayToEnglish(this.dirtyForms);
+    return dirtyFormsMessage;
+  }
+}
+
+customElements.define('mr-app', MrApp);
diff --git a/static_src/elements/mr-app/mr-app.test.js b/static_src/elements/mr-app/mr-app.test.js
new file mode 100644
index 0000000..47b953b
--- /dev/null
+++ b/static_src/elements/mr-app/mr-app.test.js
@@ -0,0 +1,300 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {MrApp} from './mr-app.js';
+import {store, resetState} from 'reducers/base.js';
+import {select} from 'reducers/projectV0.js';
+
+let element;
+let next;
+
+window.CS_env = {
+  token: 'foo-token',
+};
+
+describe('mr-app', () => {
+  beforeEach(() => {
+    global.ga = sinon.spy();
+    store.dispatch(resetState());
+    element = document.createElement('mr-app');
+    document.body.appendChild(element);
+    element.formsToCheck = [];
+
+    next = sinon.stub();
+  });
+
+  afterEach(() => {
+    global.ga.resetHistory();
+    document.body.removeChild(element);
+    next.reset();
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrApp);
+  });
+
+  describe('snackbar handling', () => {
+    beforeEach(() => {
+      sinon.spy(store, 'dispatch');
+    });
+
+    afterEach(() => {
+      store.dispatch.restore();
+    });
+
+    it('renders no snackbars', async () => {
+      element._snackbars = [];
+
+      await element.updateComplete;
+
+      const snackbars = element.querySelectorAll('chops-snackbar');
+
+      assert.equal(snackbars.length, 0);
+    });
+
+    it('renders multiple snackbars', async () => {
+      element._snackbars = [
+        {text: 'Snackbar one', id: 'one'},
+        {text: 'Snackbar two', id: 'two'},
+        {text: 'Snackbar three', id: 'thre'},
+      ];
+
+      await element.updateComplete;
+
+      const snackbars = element.querySelectorAll('chops-snackbar');
+
+      assert.equal(snackbars.length, 3);
+
+      assert.include(snackbars[0].textContent, 'Snackbar one');
+      assert.include(snackbars[1].textContent, 'Snackbar two');
+      assert.include(snackbars[2].textContent, 'Snackbar three');
+    });
+
+    it('closing snackbar hides snackbar', async () => {
+      element._snackbars = [
+        {text: 'Snackbar', id: 'one'},
+      ];
+
+      await element.updateComplete;
+
+      const snackbar = element.querySelector('chops-snackbar');
+
+      snackbar.close();
+
+      sinon.assert.calledWith(store.dispatch,
+          {type: 'HIDE_SNACKBAR', id: 'one'});
+    });
+  });
+
+  it('_preRouteHandler calls next()', () => {
+    const ctx = {params: {}};
+
+    element._preRouteHandler(ctx, next);
+
+    sinon.assert.calledOnce(next);
+  });
+
+  it('_preRouteHandler does not call next() on same page nav', () => {
+    element._lastContext = {path: '123'};
+    const ctx = {params: {}, path: '123'};
+
+    element._preRouteHandler(ctx, next);
+
+    assert.isFalse(ctx.handled);
+    sinon.assert.notCalled(next);
+  });
+
+  it('_preRouteHandler parses queryParams', () => {
+    const ctx = {params: {}, querystring: 'q=owner:me&colspec=Summary'};
+    element._preRouteHandler(ctx, next);
+
+    assert.deepEqual(ctx.queryParams, {q: 'owner:me', colspec: 'Summary'});
+  });
+
+  it('_preRouteHandler ignores case for queryParams keys', () => {
+    const ctx = {params: {},
+      querystring: 'Q=owner:me&ColSpeC=Summary&x=owner'};
+    element._preRouteHandler(ctx, next);
+
+    assert.deepEqual(ctx.queryParams, {q: 'owner:me', colspec: 'Summary',
+      x: 'owner'});
+  });
+
+  it('_preRouteHandler ignores case for queryParams keys', () => {
+    const ctx = {params: {},
+      querystring: 'Q=owner:me&ColSpeC=Summary&x=owner'};
+    element._preRouteHandler(ctx, next);
+
+    assert.deepEqual(ctx.queryParams, {q: 'owner:me', colspec: 'Summary',
+      x: 'owner'});
+  });
+
+  it('_postRouteHandler saves ctx.queryParams to Redux', () => {
+    const ctx = {queryParams: {q: '1234'}};
+    element._postRouteHandler(ctx, next);
+
+    assert.deepEqual(element.queryParams, {q: '1234'});
+  });
+
+  it('_postRouteHandler saves ctx to this._lastContext', () => {
+    const ctx = {path: '1234'};
+    element._postRouteHandler(ctx, next);
+
+    assert.deepEqual(element._lastContext, {path: '1234'});
+  });
+
+  describe('scroll to the top on page changes', () => {
+    beforeEach(() => {
+      sinon.stub(window, 'scrollTo');
+    });
+
+    afterEach(() => {
+      window.scrollTo.restore();
+    });
+
+    it('scrolls page to top on initial load', () => {
+      element._lastContext = null;
+      const ctx = {params: {}, path: '1234'};
+      element._postRouteHandler(ctx, next);
+
+      sinon.assert.calledWith(window.scrollTo, 0, 0);
+    });
+
+    it('scrolls page to top on parh change', () => {
+      element._lastContext = {params: {}, pathname: '/list',
+        path: '/list?q=123', querystring: '?q=123', queryParams: {q: '123'}};
+      const ctx = {params: {}, pathname: '/other',
+        path: '/other?q=123', querystring: '?q=123', queryParams: {q: '123'}};
+
+      element._postRouteHandler(ctx, next);
+
+      sinon.assert.calledWith(window.scrollTo, 0, 0);
+    });
+
+    it('does not scroll to top when on the same path', () => {
+      element._lastContext = {pathname: '/list', path: '/list?q=123',
+        querystring: '?a=123', queryParams: {a: '123'}};
+      const ctx = {pathname: '/list', path: '/list?q=456',
+        querystring: '?a=456', queryParams: {a: '456'}};
+
+      element._postRouteHandler(ctx, next);
+
+      sinon.assert.notCalled(window.scrollTo);
+    });
+
+    it('scrolls to the top on same path when q param changes', () => {
+      element._lastContext = {pathname: '/list', path: '/list?q=123',
+        querystring: '?q=123', queryParams: {q: '123'}};
+      const ctx = {pathname: '/list', path: '/list?q=456',
+        querystring: '?q=456', queryParams: {q: '456'}};
+
+      element._postRouteHandler(ctx, next);
+
+      sinon.assert.calledWith(window.scrollTo, 0, 0);
+    });
+  });
+
+
+  it('_postRouteHandler does not call next', () => {
+    const ctx = {path: '1234'};
+    element._postRouteHandler(ctx, next);
+
+    sinon.assert.notCalled(next);
+  });
+
+  it('_loadIssuePage loads issue page', async () => {
+    await element._loadIssuePage({
+      queryParams: {id: '234'},
+      params: {project: 'chromium'},
+    }, next);
+    await element.updateComplete;
+
+    // Check that only one page element is rendering at a time.
+    const main = element.querySelector('main');
+    assert.equal(main.children.length, 1);
+
+    const issuePage = element.querySelector('mr-issue-page');
+    assert.isDefined(issuePage, 'issue page is defined');
+    assert.equal(issuePage.issueRef.projectName, 'chromium');
+    assert.equal(issuePage.issueRef.localId, 234);
+  });
+
+  it('_loadListPage loads list page', async () => {
+    await element._loadListPage({
+      params: {project: 'chromium'},
+    }, next);
+    await element.updateComplete;
+
+    // Check that only one page element is rendering at a time.
+    const main = element.querySelector('main');
+    assert.equal(main.children.length, 1);
+
+    const listPage = element.querySelector('mr-list-page');
+    assert.isDefined(listPage, 'list page is defined');
+  });
+
+  it('_loadListPage loads grid page', async () => {
+    element.queryParams = {mode: 'grid'};
+    await element._loadListPage({
+      params: {project: 'chromium'},
+    }, next);
+    await element.updateComplete;
+
+    // Check that only one page element is rendering at a time.
+    const main = element.querySelector('main');
+    assert.equal(main.children.length, 1);
+
+    const gridPage = element.querySelector('mr-grid-page');
+    assert.isDefined(gridPage, 'grid page is defined');
+  });
+
+  describe('_selectProject', () => {
+    beforeEach(() => {
+      sinon.spy(store, 'dispatch');
+    });
+
+    afterEach(() => {
+      store.dispatch.restore();
+    });
+
+    it('selects and fetches project', () => {
+      const projectName = 'chromium';
+      assert.notEqual(store.getState().projectV0.name, projectName);
+
+      element._selectProject(projectName);
+
+      sinon.assert.calledTwice(store.dispatch);
+    });
+
+    it('skips selecting and fetching when project isn\'t changing', () => {
+      const projectName = 'chromium';
+
+      store.dispatch.restore();
+      store.dispatch(select(projectName));
+      sinon.spy(store, 'dispatch');
+
+      assert.equal(store.getState().projectV0.name, projectName);
+
+      element._selectProject(projectName);
+
+      sinon.assert.notCalled(store.dispatch);
+    });
+
+    it('selects without fetching when transitioning to null', () => {
+      const projectName = 'chromium';
+
+      store.dispatch.restore();
+      store.dispatch(select(projectName));
+      sinon.spy(store, 'dispatch');
+
+      assert.equal(store.getState().projectV0.name, projectName);
+
+      element._selectProject(null);
+
+      sinon.assert.calledOnce(store.dispatch);
+    });
+  });
+});
diff --git a/static_src/elements/projects/mr-projects-page/helpers.js b/static_src/elements/projects/mr-projects-page/helpers.js
new file mode 100644
index 0000000..5c12ae8
--- /dev/null
+++ b/static_src/elements/projects/mr-projects-page/helpers.js
@@ -0,0 +1,30 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {projectMemberToProjectName} from 'shared/converters.js';
+
+// TODO(crbug.com/monorail/7910): Dedupe this with the similar "projectRoles"
+// constant in <mr-header>.
+const projectRoles = Object.freeze({
+  PROJECT_ROLE_UNSPECIFIED: '',
+  OWNER: 'Owner',
+  COMMITTER: 'Committer',
+  CONTRIBUTOR: 'Contributor',
+});
+
+/**
+ * Creates a mapping of project names to the user's role in that project.
+ * @param {Array<ProjectMember>} projectMembers Project memebrships
+ *   for a given user.
+ * @return {Object<ProjectName, string>} Mapping of a user's roles,
+ *   by project name.
+ */
+export function computeRoleByProjectName(projectMembers) {
+  const mapping = {};
+  if (!projectMembers) return mapping;
+  projectMembers.forEach(({name, role}) => {
+    mapping[projectMemberToProjectName(name)] = projectRoles[role];
+  });
+  return mapping;
+}
diff --git a/static_src/elements/projects/mr-projects-page/helpers.test.js b/static_src/elements/projects/mr-projects-page/helpers.test.js
new file mode 100644
index 0000000..9e3c5a2
--- /dev/null
+++ b/static_src/elements/projects/mr-projects-page/helpers.test.js
@@ -0,0 +1,24 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {computeRoleByProjectName} from './helpers.js';
+
+describe('computeRoleByProjectName', () => {
+  it('handles empty project memberships', () => {
+    assert.deepEqual(computeRoleByProjectName(undefined), {});
+    assert.deepEqual(computeRoleByProjectName([]), {});
+  });
+
+  it('creates mapping', () => {
+    const projectMembers = [
+      {role: 'OWNER', name: 'projects/project-name/members/1234'},
+      {role: 'COMMITTER', name: 'projects/test/members/1234'},
+    ];
+    assert.deepEqual(computeRoleByProjectName(projectMembers), {
+      'projects/project-name': 'Owner',
+      'projects/test': 'Committer',
+    });
+  });
+});
diff --git a/static_src/elements/projects/mr-projects-page/mr-projects-page.js b/static_src/elements/projects/mr-projects-page/mr-projects-page.js
new file mode 100644
index 0000000..1124ef0
--- /dev/null
+++ b/static_src/elements/projects/mr-projects-page/mr-projects-page.js
@@ -0,0 +1,297 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {LitElement, html, css} from 'lit-element';
+import {store, connectStore} from 'reducers/base.js';
+import {SHARED_STYLES} from 'shared/shared-styles.js';
+import 'elements/framework/mr-star/mr-project-star.js';
+import 'shared/typedef.js';
+import 'elements/chops/chops-chip/chops-chip.js';
+
+import * as projects from 'reducers/projects.js';
+import {users} from 'reducers/users.js';
+import {stars} from 'reducers/stars.js';
+import {computeRoleByProjectName} from './helpers.js';
+
+
+/**
+ * `<mr-projects-page>`
+ *
+ * Displays list of all projects.
+ *
+ */
+export class MrProjectsPage extends connectStore(LitElement) {
+  /** @override */
+  static get styles() {
+    return [
+      SHARED_STYLES,
+      css`
+        :host {
+          box-sizing: border-box;
+          display: block;
+          padding: 1em 8px;
+          padding-left: 40px; /** 32px + 8px */
+          margin: auto;
+          max-width: 1280px;
+          width: 100%;
+        }
+        :host::after {
+          content: "";
+          background-image: url('/static/images/chromium.svg');
+          background-repeat: no-repeat;
+          background-position: right -100px bottom -150px;
+          background-size: 700px;
+          opacity: 0.09;
+          width: 100%;
+          height: 100%;
+          bottom: 0;
+          right: 0;
+          position: fixed;
+          z-index: -1;
+        }
+        h2 {
+          font-size: 20px;
+          letter-spacing: 0.1px;
+          font-weight: 500;
+          margin-top: 1em;
+        }
+        .project-header {
+          display: flex;
+          align-items: flex-start;
+          flex-direction: row;
+          justify-content: space-between;
+          font-size: 16px;
+          line-height: 24px;
+          margin: 0;
+          margin-bottom: 16px;
+          padding-top: 0.1em;
+          padding-bottom: 16px;
+          letter-spacing: 0.1px;
+          font-weight: 500;
+          width: 100%;
+          border-bottom: var(--chops-normal-border);
+          border-color: var(--chops-gray-400);
+        }
+        .project-title {
+          display: flex;
+          flex-direction: column;
+        }
+        h3 {
+          margin: 0;
+          padding: 0;
+          font-weight: inherit;
+          font-size: inherit;
+          transition: color var(--chops-transition-time) ease-in-out;
+        }
+        h3:hover {
+          color: var(--chops-link-color);
+        }
+        .subtitle {
+          color: var(--chops-gray-700);
+          font-size: var(--chops-main-font-size);
+          line-height: 100%;
+          font-weight: normal;
+        }
+        .project-container {
+          display: flex;
+          align-items: stretch;
+          flex-wrap: wrap;
+          width: 100%;
+          padding: 0.5em 0;
+          margin-bottom: 3em;
+        }
+        .project {
+          background: var(--chops-white);
+          width: 220px;
+          margin-right: 32px;
+          margin-bottom: 32px;
+          display: flex;
+          flex-direction: column;
+          align-items: flex-start;
+          justify-content: flex-start;
+          border-radius: 4px;
+          border: var(--chops-normal-border);
+          padding: 16px;
+          color: var(--chops-primary-font-color);
+          font-weight: normal;
+          line-height: 16px;
+          transition: all var(--chops-transition-time) ease-in-out;
+        }
+        .project:hover {
+          text-decoration: none;
+          cursor: pointer;
+          box-shadow: 0 2px 6px hsla(0,0%,0%,0.12),
+            0 1px 3px hsla(0,0%,0%,0.24);
+        }
+        .project > p {
+          margin: 0;
+          margin-bottom: 32px;
+          flex-grow: 1;
+        }
+        .view-project-link {
+          text-transform: uppercase;
+          margin: 0;
+          font-weight: 600;
+          flex-grow: 0;
+        }
+        .view-project-link:hover {
+          text-decoration: underline;
+        }
+      `,
+    ];
+  }
+
+  /** @override */
+  render() {
+    const myProjects = this.myProjects;
+    const otherProjects = this.otherProjects;
+    const noProjects = !myProjects.length && !otherProjects.length;
+
+    if (this._isFetchingProjects && noProjects) {
+      return html`Loading...`;
+    }
+
+    if (noProjects) {
+      return html`No projects found.`;
+    }
+
+    if (!myProjects.length) {
+      // Skip sorting projects into different sections if the user
+      // has no projects.
+      return html`
+        <h2>All projects</h2>
+        <div class="project-container all-projects">
+          ${otherProjects.map((project) => this._renderProject(project))}
+        </div>
+      `;
+    }
+
+    const myProjectsTemplate = myProjects.map((project) => this._renderProject(
+        project, this._roleByProjectName[project.name]));
+
+    return html`
+      <h2>My projects</h2>
+      <div class="project-container my-projects">
+        ${myProjectsTemplate}
+      </div>
+
+      <h2>Other projects</h2>
+      <div class="project-container other-projects">
+        ${otherProjects.map((project) => this._renderProject(project))}
+      </div>
+    `;
+  }
+
+  /** @override */
+  static get properties() {
+    return {
+      _projects: {type: Array},
+      _isFetchingProjects: {type: Boolean},
+      _currentUser: {type: String},
+      _roleByProjectName: {type: Array},
+    };
+  }
+
+  /** @override */
+  constructor() {
+    super();
+    /**
+     * @type {Array<Project>}
+     */
+    this._projects = [];
+    /**
+     * @type {boolean}
+     */
+    this._isFetchingProjects = false;
+    /**
+     * @type {string}
+     */
+    this._currentUser = undefined;
+    /**
+     * @type {Object<ProjectName, string>}
+     */
+    this._roleByProjectName = {};
+  }
+
+  /** @override */
+  connectedCallback() {
+    super.connectedCallback();
+    store.dispatch(projects.list());
+  }
+
+  /** @override */
+  updated(changedProperties) {
+    if (changedProperties.has('_currentUser') && this._currentUser) {
+      const userName = this._currentUser;
+      store.dispatch(users.gatherProjectMemberships(userName));
+      store.dispatch(stars.listProjects(userName));
+    }
+  }
+
+  /** @override */
+  stateChanged(state) {
+    this._projects = projects.all(state);
+    this._isFetchingProjects = projects.requests(state).list.requesting;
+    this._currentUser = users.currentUserName(state);
+    const allProjectMemberships = users.projectMemberships(state);
+    this._roleByProjectName = computeRoleByProjectName(
+        allProjectMemberships[this._currentUser]);
+  }
+
+  /**
+   * @param {Project} project
+   * @param {string=} role
+   * @return {TemplateResult}
+   */
+  _renderProject(project, role) {
+    return html`
+      <a href="/p/${project.displayName}/issues/list" class="project">
+        <div class="project-header">
+          <span class="project-title">
+            <h3>${project.displayName}</h3>
+            <span class="subtitle" ?hidden=${!role} title="My role: ${role}">
+              Role: ${role}
+            </span>
+          </span>
+
+          <mr-project-star .name=${project.name}></mr-project-star>
+        </div>
+        <p>
+          ${project.summary}
+        </p>
+        <button class="view-project-link linkify">
+          View project
+        </button>
+      </a>
+    `;
+  }
+
+  /**
+   * Projects the currently logged in user is a member of.
+   * @return {Array<Project>}
+   */
+  get myProjects() {
+    return this._projects.filter(
+        ({name}) => this._userIsMemberOfProject(name));
+  }
+
+  /**
+   * Projects the currently logged in user is not a member of.
+   * @return {Array<Project>}
+   */
+  get otherProjects() {
+    return this._projects.filter(
+        ({name}) => !this._userIsMemberOfProject(name));
+  }
+
+  /**
+   * Helper to check if a user is a member of a project.
+   * @param {ProjectName} project Resource name of a project.
+   * @return {boolean} Whether the user a member of the given project.
+   */
+  _userIsMemberOfProject(project) {
+    return project in this._roleByProjectName;
+  }
+}
+customElements.define('mr-projects-page', MrProjectsPage);
diff --git a/static_src/elements/projects/mr-projects-page/mr-projects-page.test.js b/static_src/elements/projects/mr-projects-page/mr-projects-page.test.js
new file mode 100644
index 0000000..1a9a1e4
--- /dev/null
+++ b/static_src/elements/projects/mr-projects-page/mr-projects-page.test.js
@@ -0,0 +1,248 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {prpcClient} from 'prpc-client-instance.js';
+import {stateUpdated} from 'reducers/base.js';
+import {users} from 'reducers/users.js';
+import {stars} from 'reducers/stars.js';
+import {MrProjectsPage} from './mr-projects-page.js';
+
+let element;
+
+describe('mr-projects-page', () => {
+  beforeEach(() => {
+    element = document.createElement('mr-projects-page');
+    document.body.appendChild(element);
+
+    sinon.stub(element, 'stateChanged');
+  });
+
+  afterEach(() => {
+    document.body.removeChild(element);
+  });
+
+  it('initializes', () => {
+    assert.instanceOf(element, MrProjectsPage);
+  });
+
+  it('renders loading', async () => {
+    element._isFetchingProjects = true;
+
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.textContent.trim(), 'Loading...');
+  });
+
+  it('renders projects when refetching projects', async () => {
+    element._isFetchingProjects = true;
+    element._projects = [
+      {name: 'projects/chromium', displayName: 'chromium',
+        summary: 'Best project ever'},
+    ];
+
+    await element.updateComplete;
+
+    const headers = element.shadowRoot.querySelectorAll('h2');
+
+    assert.equal(headers.length, 1);
+    assert.equal(headers[0].textContent.trim(), 'All projects');
+
+    const projects = element.shadowRoot.querySelectorAll(
+        '.all-projects > .project');
+    assert.equal(projects.length, 1);
+
+    assert.include(projects[0].querySelector('h3').textContent, 'chromium');
+    assert.include(projects[0].textContent, 'Best project ever');
+  });
+
+  it('renders all projects when no user projects', async () => {
+    element._isFetchingProjects = false;
+    element._projects = [
+      {name: 'projects/chromium', displayName: 'chromium',
+        summary: 'Best project ever'},
+      {name: 'projects/infra', displayName: 'infra',
+        summary: 'Make it work'},
+    ];
+
+    await element.updateComplete;
+
+    const headers = element.shadowRoot.querySelectorAll('h2');
+
+    assert.equal(headers.length, 1);
+    assert.equal(headers[0].textContent.trim(), 'All projects');
+
+    const projects = element.shadowRoot.querySelectorAll(
+        '.all-projects > .project');
+    assert.equal(projects.length, 2);
+
+    assert.include(projects[0].querySelector('h3').textContent, 'chromium');
+    assert.include(projects[0].textContent, 'Best project ever');
+
+    assert.include(projects[1].querySelector('h3').textContent, 'infra');
+    assert.include(projects[1].textContent, 'Make it work');
+  });
+
+  it('renders no projects found', async () => {
+    element._isFetchingProjects = false;
+    sinon.stub(element, 'myProjects').get(() => []);
+    sinon.stub(element, 'otherProjects').get(() => []);
+
+    await element.updateComplete;
+
+    assert.equal(element.shadowRoot.textContent.trim(), 'No projects found.');
+  });
+
+  describe('project grouping', () => {
+    beforeEach(() => {
+      element._projects = [
+        {name: 'projects/chromium', displayName: 'chromium',
+          summary: 'Best project ever'},
+        {name: 'projects/infra', displayName: 'infra',
+          summary: 'Make it work'},
+        {name: 'projects/test', displayName: 'test',
+          summary: 'Hmm'},
+        {name: 'projects/a-project', displayName: 'a-project',
+          summary: 'I am Monkeyrail'},
+      ];
+      element._roleByProjectName = {
+        'projects/chromium': 'Owner',
+        'projects/infra': 'Committer',
+      };
+      element._isFetchingProjects = false;
+    });
+
+    it('myProjects filters out non-member projects', () => {
+      assert.deepEqual(element.myProjects, [
+        {name: 'projects/chromium', displayName: 'chromium',
+          summary: 'Best project ever'},
+        {name: 'projects/infra', displayName: 'infra',
+          summary: 'Make it work'},
+      ]);
+    });
+
+    it('otherProjects filters out member projects', () => {
+      assert.deepEqual(element.otherProjects, [
+        {name: 'projects/test', displayName: 'test',
+          summary: 'Hmm'},
+        {name: 'projects/a-project', displayName: 'a-project',
+          summary: 'I am Monkeyrail'},
+      ]);
+    });
+
+    it('renders user projects', async () => {
+      await element.updateComplete;
+
+      const projects = element.shadowRoot.querySelectorAll(
+          '.my-projects > .project');
+
+      assert.equal(projects.length, 2);
+      assert.include(projects[0].querySelector('h3').textContent, 'chromium');
+      assert.include(projects[0].textContent, 'Best project ever');
+      assert.include(projects[0].querySelector('.subtitle').textContent,
+          'Owner');
+
+      assert.include(projects[1].querySelector('h3').textContent, 'infra');
+      assert.include(projects[1].textContent, 'Make it work');
+      assert.include(projects[1].querySelector('.subtitle').textContent,
+          'Committer');
+    });
+
+    it('renders other projects', async () => {
+      await element.updateComplete;
+
+      const projects = element.shadowRoot.querySelectorAll(
+          '.other-projects > .project');
+
+      assert.equal(projects.length, 2);
+      assert.include(projects[0].querySelector('h3').textContent, 'test');
+      assert.include(projects[0].textContent, 'Hmm');
+
+      assert.include(projects[1].querySelector('h3').textContent, 'a-project');
+      assert.include(projects[1].textContent, 'I am Monkeyrail');
+    });
+  });
+});
+
+describe('mr-projects-page (connected)', () => {
+  beforeEach(() => {
+    sinon.stub(prpcClient, 'call');
+    sinon.spy(users, 'gatherProjectMemberships');
+    sinon.spy(stars, 'listProjects');
+
+    element = document.createElement('mr-projects-page');
+  });
+
+  afterEach(() => {
+    if (document.body.contains(element)) {
+      document.body.removeChild(element);
+    }
+
+    prpcClient.call.restore();
+    users.gatherProjectMemberships.restore();
+    stars.listProjects.restore();
+  });
+
+  it('fetches projects when connected', async () => {
+    const promise = Promise.resolve({
+      projects: [{name: 'projects/proj', displayName: 'proj',
+        summary: 'test'}],
+    });
+    prpcClient.call.returns(promise);
+
+    assert.isFalse(element._isFetchingProjects);
+    sinon.assert.notCalled(prpcClient.call);
+
+    // Trigger connectedCallback().
+    document.body.appendChild(element);
+    await stateUpdated, element.updateComplete;
+
+    sinon.assert.calledWith(prpcClient.call, 'monorail.v3.Projects',
+        'ListProjects', {});
+
+    assert.isFalse(element._isFetchingProjects);
+    assert.deepEqual(element._projects,
+        [{name: 'projects/proj', displayName: 'proj',
+          summary: 'test'}]);
+  });
+
+  it('does not gather projects when user is logged out', async () => {
+    document.body.appendChild(element);
+    element._currentUser = '';
+
+    await element.updateComplete;
+
+    sinon.assert.notCalled(users.gatherProjectMemberships);
+  });
+
+  it('gathers user projects when user is logged in', async () => {
+    document.body.appendChild(element);
+    element._currentUser = 'users/1234';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(users.gatherProjectMemberships);
+    sinon.assert.calledWith(users.gatherProjectMemberships, 'users/1234');
+  });
+
+  it('does not fetch stars user is logged out', async () => {
+    document.body.appendChild(element);
+    element._currentUser = '';
+
+    await element.updateComplete;
+
+    sinon.assert.notCalled(stars.listProjects);
+  });
+
+  it('fetches stars when user is logged in', async () => {
+    document.body.appendChild(element);
+    element._currentUser = 'users/1234';
+
+    await element.updateComplete;
+
+    sinon.assert.calledOnce(stars.listProjects);
+    sinon.assert.calledWith(stars.listProjects, 'users/1234');
+  });
+});