Fix javascript error "window" is not an element.

We could add:

        if (!(window instanceof Element)) {
          return;
        }

But window will never be an element, meaning this whole js seems kind of useless?

(function ($, Drupal) {
  Drupal.behaviors.drowl_admin_core_dialog_enhancements = {
    attach: function (context, settings) {
      // Add body classes if a modal is currently opened or not.
      // We use them in drowl_admin.theme_overrides.gin.scss to block
      // disturbing body scrolling while a modal is opened.
      if ($(".webform-ajax-form-wrapper").length == 0) {
        // Exclude webform from this, they do weird things we wont support here.
        $(once("drowl-admin-core-dialog-enhancements", window)) // THIS ALWAYS FAILS
          .on("dialog:beforecreate", function () {
            $("body:first").addClass("drowl-admin--core-dialog-open");
          })

(The code in question "drowl_admin.core_dialog_enhancements.js")

The once functions take 2 parameters, a string id without spaces and an array-like object. The recommended way to use it is to call it with the string you would use in a querySelectorAll() call. You can only use once with objects that are instances of Element, which means you can not use it with the document or window object. If you need a page-level element please use 'html' or 'body' as the selector used in the once call: once('my-global-once', 'html').

https://www.drupal.org/node/3158256 →

@thomas.frobieter please test if this works.

It seems that GIN (or the core dialog.js) already prevents scrolling when the dialogue is open. Therefore, this fix is no longer required.

I will remove the Javascript file and the corresponding CSS code.

Done. I'll create a new release.