src/contentScripts/communityConsole/updateHandler/banner/components/index.js

import consoleCommonStyles from '!!raw-loader!../../../../../static/css/common/console.css';
import {msg} from '@lit/localize';
import {MDCBanner} from '@material/banner';
import {css, html, unsafeCSS} from 'lit';
import {createRef, ref} from 'lit/directives/ref.js';

import {I18nLitElement} from '../../../../../common/litI18nUtils.js';
import {SHARED_MD3_STYLES} from '../../../../../common/styles/md3.js';

import {TWPT_UPDATE_BANNER_TAG} from './consts.js';
import mdcStyles from './mdcStyles.scss?string';

export default class TwptUpdateBanner extends I18nLitElement {
  static properties = {
    isinstall: {type: Boolean},
  };

  static styles = [
    css`
    :host {
      position: sticky;
      top: 0;
      z-index: 97;
    }

    .mdc-banner {
      background-color: var(--TWPT-drawer-background, #fff)!important;
    }

    .mdc-banner__graphic {
      color: var(--mdc-theme-on-primary)!important;
      background-color: var(--mdc-theme-primary)!important;
    }

    .mdc-banner__text {
      color: var(--TWPT-primary-text, #000)!important;
    }
    `,
    css`${unsafeCSS(consoleCommonStyles)}`,
    SHARED_MD3_STYLES,
    css`${unsafeCSS(mdcStyles)}`,
  ];

  bannerRef = createRef();

  constructor() {
    super();
    this.isinstall = false;
    this.mdcBanner = null;
  }

  firstUpdated() {
    this.mdcBanner = new MDCBanner(this.bannerRef.value);
    this.mdcBanner.open();
  }

  render() {
    let descriptionMsg;
    if (this.isinstall) {
      descriptionMsg = msg(
          'The TW Power Tools extension has been installed. Please reload this page so that it is activated.',
          {
            desc:
                'Message shown as a banner when the extension has been installed, to let the user know that they should reload the page.'
          });
    } else {
      descriptionMsg = msg(
          'The TW Power Tools extension has been updated. Please reload this page so that it continues to work properly.',
          {
            desc:
                'Message shown as a banner when the extension has been updated, to let the user know that they should reload the page.'
          });
    }
    const reloadMsg =
        msg('Reload', {desc: 'Button which reloads the current page.'});
    return html`
      <div ${ref(this.bannerRef)}
          class="mdc-banner mdc-banner--centered mdc-banner--mobile-stacked"
          role="banner">
        <div class="mdc-banner__content"
             role="alertdialog"
             aria-live="assertive">
          <div class="mdc-banner__graphic-text-wrapper">
            <div
                class="mdc-banner__graphic"
                role="img"
                alt="Update">
              <md-icon class="mdc-banner__icon">update</md-icon>
            </div>
            <div class="mdc-banner__text">
              ${descriptionMsg}
            </div>
          </div>
          <div class="mdc-banner__actions">
            <md-text-button
                class="mdc-banner__primary-action"
                @click=${this._reloadPage}>
              ${reloadMsg}
            </md-text-button>
          </div>
        </div>
      </div>
    `;
  }

  _reloadPage() {
    location.reload();
  }
}
// This element is injected each time an extension is installed/updated, so it
// might already be defined. If it isn't, register it. If there are any breaking
// changes, change TWPT_UPDATE_BANNER_TAG to a higher version.
if (window.customElements.get(TWPT_UPDATE_BANNER_TAG) === undefined) {
import(
      /* webpackMode: "eager" */
      '@material/web/icon/icon.js');
import(
      /* webpackMode: "eager" */
      '@material/web/button/text-button.js');

  window.customElements.define(TWPT_UPDATE_BANNER_TAG, TwptUpdateBanner);
}