index.html

<!DOCTYPE HTML>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Elm • Polymer</title>

        <!-- Chrome does not need the following polyfill, but when I try a conditional load per
             https://www.polymer-project.org/1.0/docs/browsers and then vulcanize this file,
             the result does not work in Firefox. So load it unconditionally. -->
        <script src="bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>

        <!-- Load the data-picker component definition -->
        <link rel="import" href="bower_components/paper-date-picker/paper-date-picker.html">
    </head>
    <body>
        <script type="text/javascript" src="elm.js"></script>
        <script type="text/javascript">
         var app = Elm.Main.fullscreen();
        </script>
    </body>
</html>