Source: modules/quickedit/js/models/AppModel.es6.js

/**
 * @file
 * A Backbone Model for the state of the in-place editing application.
 *
 * @see Drupal.quickedit.AppView
 */

(function (Backbone, Drupal) {
  /**
   * @constructor
   *
   * @augments Backbone.Model
   */
  Drupal.quickedit.AppModel = Backbone.Model.extend(
    /** @lends Drupal.quickedit.AppModel# */ {
      /**
       * @type {object}
       *
       * @prop {Drupal.quickedit.FieldModel} highlightedField
       * @prop {Drupal.quickedit.FieldModel} activeField
       * @prop {Drupal.dialog~dialogDefinition} activeModal
       */
      defaults: /** @lends Drupal.quickedit.AppModel# */ {
        /**
         * The currently state='highlighted' Drupal.quickedit.FieldModel, if any.
         *
         * @type {Drupal.quickedit.FieldModel}
         *
         * @see Drupal.quickedit.FieldModel.states
         */
        highlightedField: null,

        /**
         * The currently state = 'active' Drupal.quickedit.FieldModel, if any.
         *
         * @type {Drupal.quickedit.FieldModel}
         *
         * @see Drupal.quickedit.FieldModel.states
         */
        activeField: null,

        /**
         * Reference to a {@link Drupal.dialog} instance if a state change
         * requires confirmation.
         *
         * @type {Drupal.dialog~dialogDefinition}
         */
        activeModal: null,
      },
    },
  );
})(Backbone, Drupal);