<paper-button>
Material design: Buttons
paper-button is a button. When the user touches the button, a ripple effect emanates from the point of contact. It may be flat or raised. A raised button is styled with a shadow.
See: Documentation, Demo.
Usage
Installation
npm install --save @polymer/paper-button
 
In an html file
<html>
  <head>
    <script type="module">
      import '@polymer/paper-button/paper-button.js';
    </script>
  </head>
  <body>
    <paper-button class="pink">link</paper-button>
    <paper-button raised class="indigo">raised</paper-button>
    <paper-button toggles raised class="green">toggles</paper-button>
    <paper-button disabled class="disabled">disabled</paper-button>
  </body>
</html> 
In a Polymer 3 element
import {PolymerElement, html} from '@polymer/polymer';
import '@polymer/paper-button/paper-button.js';
class SampleElement extends PolymerElement {
  static get template() {
    return html`
      <paper-button class="pink">link</paper-button>
      <paper-button raised class="indigo">raised</paper-button>
      <paper-button toggles raised class="green">toggles</paper-button>
      <paper-button disabled class="disabled">disabled</paper-button>
    `;
  }
}
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-button
cd paper-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