Update to Drupal 8.1.0. For more information, see https://www.drupal.org/drupal-8.1.0-release-notes

core/misc/dialog/dialog.ajax.js

@@ -11,6 +11,9 @@
    * Initialize dialogs for Ajax purposes.
    *
    * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attaches the behaviors for dialog ajax functionality.
    */
   Drupal.behaviors.dialog = {
     attach: function (context, settings) {
@@ -90,10 +93,14 @@
    * Command to open a dialog.
    *
    * @param {Drupal.Ajax} ajax
+   *   The Drupal Ajax object.
    * @param {object} response
+   *   Object holding the server response.
    * @param {number} [status]
+   *   The HTTP status code.
    *
    * @return {bool|undefined}
+   *   Returns false if there was no selector property in the response object.
    */
   Drupal.AjaxCommands.prototype.openDialog = function (ajax, response, status) {
     if (!response.selector) {
@@ -146,10 +153,15 @@
    * If no selector is given, it defaults to trying to close the modal.
    *
    * @param {Drupal.Ajax} [ajax]
+   *   The ajax object.
    * @param {object} response
+   *   Object holding the server response.
    * @param {string} response.selector
+   *   The selector of the dialog.
    * @param {bool} response.persist
+   *   Whether to persist the dialog element or not.
    * @param {number} [status]
+   *   The HTTP status code.
    */
   Drupal.AjaxCommands.prototype.closeDialog = function (ajax, response, status) {
     var $dialog = $(response.selector);
@@ -170,11 +182,17 @@
    * JQuery UI specific way of setting dialog options.
    *
    * @param {Drupal.Ajax} [ajax]
+   *   The Drupal Ajax object.
    * @param {object} response
+   *   Object holding the server response.
    * @param {string} response.selector
+   *   Selector for the dialog element.
    * @param {string} response.optionsName
+   *   Name of a key to set.
    * @param {string} response.optionValue
+   *   Value to set.
    * @param {number} [status]
+   *   The HTTP status code.
    */
   Drupal.AjaxCommands.prototype.setDialogOption = function (ajax, response, status) {
     var $dialog = $(response.selector);
@@ -187,9 +205,13 @@
    * Binds a listener on dialog creation to handle the cancel link.
    *
    * @param {jQuery.Event} e
+   *   The event triggered.
    * @param {Drupal.dialog~dialogDefinition} dialog
+   *   The dialog instance.
    * @param {jQuery} $element
-   * @param {object} settings
+   *   The jQuery collection of the dialog element.
+   * @param {object} [settings]
+   *   Dialog settings.
    */
   $(window).on('dialog:aftercreate', function (e, dialog, $element, settings) {
     $element.on('click.dialog', '.dialog-cancel', function (e) {
@@ -203,8 +225,11 @@
    * Removes all 'dialog' listeners.
    *
    * @param {jQuery.Event} e
+   *   The event triggered.
    * @param {Drupal.dialog~dialogDefinition} dialog
+   *   The dialog instance.
    * @param {jQuery} $element
+   *   jQuery collection of the dialog element.
    */
   $(window).on('dialog:beforeclose', function (e, dialog, $element) {
     $element.off('.dialog');

core/misc/dialog/dialog.js

@@ -55,10 +55,12 @@
    * Polyfill HTML5 dialog element with jQueryUI.
    *
    * @param {HTMLElement} element
+   *   The element that holds the dialog.
    * @param {object} options
    *   jQuery UI options to be passed to the dialog.
    *
    * @return {Drupal.dialog~dialogDefinition}
+   *   The dialog instance.
    */
   Drupal.dialog = function (element, options) {
     var undef;

core/misc/dialog/dialog.position.js

@@ -27,6 +27,7 @@
    * @function Drupal.dialog~resetSize
    *
    * @param {jQuery.Event} event
+   *   The event triggered.
    *
    * @fires event:dialogContentResize
    */
@@ -67,8 +68,10 @@
    * @function Drupal.dialog~resetPosition
    *
    * @param {object} options
+   *   Options object.
    *
    * @return {object}
+   *   Altered options object.
    */
   function resetPosition(options) {
     var offsets = displace.offsets;