Update to Drupal 8.0.0-beta15. For more information, see: https://www.drupal.org/node/2563023

core/modules/contextual/js/toolbar/views/AuralView.js

@@ -24,6 +24,7 @@
      * @augments Backbone.View
      *
      * @param {object} options
+     *   Options for the view.
      */
     initialize: function (options) {
       this.options = options;
@@ -38,6 +39,7 @@
      * @inheritdoc
      *
      * @return {Drupal.contextualToolbar.AuralView}
+     *   The current contextual toolbar aural view.
      */
     render: function () {
       // Render the state.
@@ -80,6 +82,7 @@
      * Responds to esc and tab key press events.
      *
      * @param {jQuery.Event} event
+     *   The keypress event.
      */
     onKeypress: function (event) {
       // The first tab key press is tracked so that an annoucement about tabbing

core/modules/contextual/js/toolbar/views/VisualView.js

@@ -10,7 +10,10 @@
   Drupal.contextualToolbar.VisualView = Backbone.View.extend(/** @lends Drupal.contextualToolbar.VisualView# */{
 
     /**
+     * Events for the Backbone view.
+     *
      * @return {object}
+     *   A mapping of events to be used in the view.
      */
     events: function () {
       // Prevents delay and simulated mouse events.
@@ -20,10 +23,10 @@
       };
 
       return {
-        'click': function () {
+        click: function () {
           this.model.set('isViewing', !this.model.get('isViewing'));
         },
-        'touchend': touchEndToClick
+        touchend: touchEndToClick
       };
     },
 
@@ -45,6 +48,7 @@
      * @inheritdoc
      *
      * @return {Drupal.contextualToolbar.VisualView}
+     *   The current contextual toolbar visual view.
      */
     render: function () {
       // Render the visibility.