index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>democalendar</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/vue.resource/1.3.1/vue-resource.min.js"></script>
    <script async defer src="https://apis.google.com/js/api.js">
    /* eslint-disable*/
</script>

  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>