index.html

<!doctype html>
<!--
Copyright (c) 2016-17 Felix Edelmann. 
The project is distributed under the MIT License, so you can use or modify the code as you like, you only need to name the author (e. g. by adding a link to the GitHub repository).

Source code: https://github.com/fxedel/toggle-icon
Component page / demo: http://fxedel.github.io/toggle-icon/
-->

<html>
  <head>
    <title>toggle-icon</title>
    <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1, user-scalable=yes">
    <script type="module">
      import '@polymer/iron-component-page/iron-component-page.js';
    </script>
  </head>
  <body>
    <iron-component-page></iron-component-page>
  </body>
</html>