<paper-slider>
Material design: Sliders
paper-slider allows user to select a value from a range of values by moving the slider thumb. The interactive nature of the slider makes it a great choice for settings that reflect intensity levels, such as volume, brightness, or color saturation.
See: Documentation, Demo.
Usage
Installation
npm install --save @polymer/paper-slider
 
In an html file
<html>
  <head>
    <script type="module">
      import '@polymer/paper-slider/paper-slider.js';
    </script>
  </head>
  <body>
    <paper-slider
        value="183"
        max="255"
        secondary-progress="200"
        editable>
    </paper-slider>
  </body>
</html> 
In a Polymer 3 element
import {PolymerElement, html} from '@polymer/polymer';
import '@polymer/paper-slider/paper-slider.js';
class SampleElement extends PolymerElement {
  static get template() {
    return html`
      <paper-slider
        value="183"
        max="255"
        secondary-progress="200"
        editable>
    </paper-slider>
    `;
  }
}
customElements.define('sample-element', SampleElement); 
Contributing
If you want to send a PR to this element, here are the instructions for running the tests and demo locally:
Installation
git clone https://github.com/PolymerElements/paper-slider
cd paper-slider
npm install
npm install -g polymer-cli 
Running the demo locally
polymer serve --npm
open http://127.0.0.1:<port>/demo/ 
Running the tests
polymer test --npm