diff --git a/core/modules/block_place/js/block_place.es6.js b/core/modules/block_place/js/block_place.es6.js
index 73f1e77555..3509161aaa 100644
--- a/core/modules/block_place/js/block_place.es6.js
+++ b/core/modules/block_place/js/block_place.es6.js
@@ -11,31 +11,30 @@
     isBlockPlaceMode: () => {
       const queryString = decodeURI(window.location.search);
       return (/block-place=1/i.test(queryString) || /block-place-region-sort=/i.test(queryString));
-    }
+    },
   };
 
   Drupal.behaviors.blockPlace = {
-    attach: function (context, settings) {
+    attach(context, settings) {
       // If drupalSettings.block_place is set open open dialog.
       if (drupalSettings.hasOwnProperty('block_place') && drupalSettings.block_place.hasOwnProperty('dialog_url')) {
-        $(window).once('block_sort').each(function () {
+        $(window).once('block_sort').each(() => {
           const blockSort = Drupal.ajax({
             dialog: {},
             dialogType: drupalSettings.block_place.dialog_type,
             selector: '.ckeditor-dialog-loading-link',
             url: drupalSettings.block_place.dialog_url,
-            progress: { type: 'throbber' }
+            progress: { type: 'throbber' },
           });
           blockSort.execute();
         });
       }
-    }
+    },
   };
 
   // Make sure contextual links work with Ajax.
   // Remove in https://www.drupal.org/node/2764931.
-  $(document).once('contextual-ajax').on('drupalContextualLinkAdded', function (event, data) {
+  $(document).once('contextual-ajax').on('drupalContextualLinkAdded', (event, data) => {
     Drupal.attachBehaviors(data.$el[0]);
   });
-
-})(jQuery, window, Drupal, drupalSettings);
+}(jQuery, window, Drupal, drupalSettings));