drupal/core/modules/toolbar/js/models/ToolbarModel.js

/**
* DO NOT EDIT THIS FILE.
* See the following change record for more information,
* https://www.drupal.org/node/2815083
* @preserve
**/

(function (Backbone, Drupal) {
  Drupal.toolbar.ToolbarModel = Backbone.Model.extend({
    defaults: {
      activeTab: null,
      activeTray: null,
      isOriented: false,
      isFixed: false,
      areSubtreesLoaded: false,
      isViewportOverflowConstrained: false,
      orientation: 'horizontal',
      locked: false,
      isTrayToggleVisible: true,
      height: null,
      offsets: {
        top: 0,
        right: 0,
        bottom: 0,
        left: 0
      }
    },
    validate: function validate(attributes, options) {
      if (attributes.orientation === 'horizontal' && this.get('locked') && !options.override) {
        return Drupal.t('The toolbar cannot be set to a horizontal orientation when it is locked.');
      }
    }
  });
})(Backbone, Drupal);