

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">

  <title>app-header-layout demo</title>

  <script src="https://unpkg.com/@webcomponents/webcomponentsjs@^2.0.0/webcomponents-loader.js"></script>

  <script type="module">
    import '@polymer/font-roboto/roboto.js';
    import '@polymer/iron-icons/iron-icons.js';
    import '@polymer/paper-icon-button/paper-icon-button.js';
    // Import e