annotate core/modules/toolbar/js/views/MenuVisualView.es6.js @ 9:1fc0ff908d1f

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/**
 * @file
 * A Backbone view for the collapsible menus.
 */

(function ($, Backbone, Drupal) {
  Drupal.toolbar.MenuVisualView = Backbone.View.extend(/** @lends Drupal.toolbar.MenuVisualView# */{

    /**
     * Backbone View for collapsible menus.
     *
     * @constructs
     *
     * @augments Backbone.View
     */
    initialize() {
      this.listenTo(this.model, 'change:subtrees', this.render);
    },

    /**
     * @inheritdoc
     */
    render() {
      const subtrees = this.model.get('subtrees');
      // Add subtrees.
      for (const id in subtrees) {
        if (subtrees.hasOwnProperty(id)) {
          this.$el
            .find(`#toolbar-link-${id}`)
            .once('toolbar-subtrees')
            .after(subtrees[id]);
        }
      }
      // Render the main menu as a nested, collapsible accordion.
      if ('drupalToolbarMenu' in $.fn) {
        this.$el
          .children('.toolbar-menu')
          .drupalToolbarMenu();
      }
    },
  });
}(jQuery, Backbone, Drupal));