node_modules/material-design-lite/src/slider/snippets/demo.html

  <div class="demo-preview-block">
    <p>
      <input class="mdl-slider mdl-js-slider" type="range"
        min="0" max="100" value="0" tabindex="0">
    </p>
    <p>
      <input class="mdl-slider mdl-js-slider" type="range"
        min="0" max="100" value="10" tabindex="0">
    </p>
  </div>