getAsset.js

(function() {

  return {

    requests: {

      /**
       * Load a script file from the asset directory of the app
       *
       * @param asset String name of the JavaScript file to load
       */
      getScript: function(asset){
        return {
          url: this.assetURL(asset),
          dataType: 'script',
          cors: true,
          crossDomain: true
        }
      }
   },

    events: {
      'app.activated':'onAppActivated'
    },

    onAppActivated: function(e) {
      if (!e.firstLoad) return;

      var scripts = [];

      scripts.push(this.ajax('getScript', 'another.js'));
      scripts.push(this.ajax('getScript', 'comment_lib.js'));

      var self = this;

      // wait until all promises are done
      this.when.apply(this, scripts).done(function(data){
        console.log('all scripts loaded');

        // the app is loaded here

      }).fail(function(data){
        console.log(data);
      });
    },
  };
}());