systrace/catapult/third_party/polymer/components/google-apis/google-js-api.html

<!--
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at https://polymer.github.io/LICENSE.txt
The complete set of authors may be found at https://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at https://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at https://polymer.github.io/PATENTS.txt
-->

<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../iron-jsonp-library/iron-jsonp-library.html">

<!--
Dynamically loads Google JavaScript API `gapi`, firing the `js-api-load` event when ready.

Any number of components can use `<google-js-api>` elements, and the library will only be loaded once.

##### Example

    <google-js-api></google-js-api>
    <script>
      var api = document.querySelector('google-js-api');
      api.addEventListener('js-api-load', function(e) {
        console.log('API loaded', gapi);
      });
    </script>
-->
<script>
  Polymer({

    is: 'google-js-api',

    behaviors: [
      Polymer.IronJsonpLibraryBehavior
    ],

    properties: {

      /** @private */
      libraryUrl: {
        type: String,
        value: 'https://apis.google.com/js/api.js?onload=%%callback%%'
      },

      /**
       * Fired when the API library is loaded and available.
       * @event js-api-load
       */
      /**
       * Name of event fired when library is loaded and available.
       */
      notifyEvent: {
        type: String,
        value: 'js-api-load'
      },
    },

    get api() {
      return gapi;
    }

  });
</script>