Issue #3432850 by Steve Hanson: Cannot seem to make this work right. Follow up...

Issue #3432850 by Steve Hanson: Cannot seem to make this work right. Follow up Remove jQuery dependency from the once feature (https://www.drupal.org/node/3158256)

js/dynamic-loading.js

-(function ($, Drupal) {
+(function ($, Drupal, once) {
   // Ajax command to trigger event to notify loading of a component aka block in the layout.
   Drupal.AjaxCommands.prototype.rlbTriggerLoadedEvent = function (ajax, response, status) {
     $('[data-component-uuid=' + response.component_uuid + ']').parent().trigger('rlb:component-loaded');
@@ -51,7 +51,7 @@
   };
   Drupal.behaviors.rlbBehavior = {
     attach: function (context, settings) {
-      $('body', context).once('rlb').each(function () {
+      $(once('rlb', 'body', context)).each(function () {
         // Loop over all component elements requiring dynamic loading.
         $('*[data-rlb-to-be-loaded]').each(function(){
           $component = $(this);
@@ -93,4 +93,4 @@
       });
     }
   };
-})(jQuery, Drupal);
+})(jQuery, Drupal, once);