<paper-toggle-button>
<paper-toggle-button> provides a ON/OFF switch that user can toggle the state by tapping or by dragging the switch.
See: Documentation, Demo.
Usage
Installation
npm install --save @polymer/paper-toggle-button
In an HTML file
<html>
  <head>
    <script type="module">
      import '@polymer/paper-toggle-button/paper-toggle-button.js';
    </script>
  </head>
  <body>
    <paper-toggle-button checked></paper-toggle-button>
    <paper-toggle-button disabled></paper-toggle-button>
  </body>
</html> 
In a Polymer 3 element
import {PolymerElement} from '@polymer/polymer/polymer-element.js';
import {html} from '@polymer/polymer/lib/utils/html-tag.js';
import '@polymer/paper-toggle-button/paper-toggle-button.js';
class ExampleElement extends PolymerElement {
  static get template() {
    return html`
      <paper-toggle-button checked></paper-toggle-button>
      <paper-toggle-button disabled></paper-toggle-button>
    `;
  }
}
customElements.define('example-element', ExampleElement); 
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-toggle-button
cd paper-toggle-button
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 
 JarCasting
 JarCasting