1 files changed, 12 insertions, 45 deletions

diff --git a/core/modules/system/js/system.js b/core/modules/system/js/system.js
index 82f0de66871b..56c29f433d79 100644
--- a/core/modules/system/js/system.js
+++ b/core/modules/system/js/system.js
@@ -1,81 +1,48 @@
 /**
- * @file
- * System behaviors.
- */
+* DO NOT EDIT THIS FILE.
+* All changes should be applied to ./modules/system/js/system.es6.js
+* See the following change record for more information,
+* https://www.drupal.org/node/2873849
+* @preserve
+**/
 
 (function ($, Drupal, drupalSettings) {
 
   'use strict';
 
-  // Cache IDs in an array for ease of use.
   var ids = [];
 
-  /**
-   * Attaches field copy behavior from input fields to other input fields.
-   *
-   * When a field is filled out, apply its value to other fields that will
-   * likely use the same value. In the installer this is used to populate the
-   * administrator email address with the same value as the site email address.
-   *
-   * @type {Drupal~behavior}
-   *
-   * @prop {Drupal~behaviorAttach} attach
-   *   Attaches the field copy behavior to an input field.
-   */
   Drupal.behaviors.copyFieldValue = {
-    attach: function (context) {
-      // List of fields IDs on which to bind the event listener.
-      // Create an array of IDs to use with jQuery.
+    attach: function attach(context) {
       for (var sourceId in drupalSettings.copyFieldValue) {
         if (drupalSettings.copyFieldValue.hasOwnProperty(sourceId)) {
           ids.push(sourceId);
         }
       }
       if (ids.length) {
-        // Listen to value:copy events on all dependent fields.
-        // We have to use body and not document because of the way jQuery events
-        // bubble up the DOM tree.
         $('body').once('copy-field-values').on('value:copy', this.valueTargetCopyHandler);
-        // Listen on all source elements.
+
         $('#' + ids.join(', #')).once('copy-field-values').on('blur', this.valueSourceBlurHandler);
       }
     },
-    detach: function (context, settings, trigger) {
+    detach: function detach(context, settings, trigger) {
       if (trigger === 'unload' && ids.length) {
         $('body').removeOnce('copy-field-values').off('value:copy');
         $('#' + ids.join(', #')).removeOnce('copy-field-values').off('blur');
       }
     },
 
-    /**
-     * Event handler that fill the target element with the specified value.
-     *
-     * @param {jQuery.Event} e
-     *   Event object.
-     * @param {string} value
-     *   Custom value from jQuery trigger.
-     */
-    valueTargetCopyHandler: function (e, value) {
+    valueTargetCopyHandler: function valueTargetCopyHandler(e, value) {
       var $target = $(e.target);
       if ($target.val() === '') {
         $target.val(value);
       }
     },
 
-    /**
-     * Handler for a Blur event on a source field.
-     *
-     * This event handler will trigger a 'value:copy' event on all dependent
-     * fields.
-     *
-     * @param {jQuery.Event} e
-     *   The event triggered.
-     */
-    valueSourceBlurHandler: function (e) {
+    valueSourceBlurHandler: function valueSourceBlurHandler(e) {
       var value = $(e.target).val();
       var targetIds = drupalSettings.copyFieldValue[e.target.id];
       $('#' + targetIds.join(', #')).trigger('value:copy', value);
     }
   };
-
-})(jQuery, Drupal, drupalSettings);
+})(jQuery, Drupal, drupalSettings);
\ No newline at end of file