Issue #3440676 by Utkarsh_33, smustgrave, catch, bnjmnm, nod_: Trigger a...

    function openDialog(settings) {

      settings = $.extend({}, drupalSettings.dialog, options, settings);

      if (settings.dialogClass) {

        Drupal.deprecationError({

          message:

            'dialogClass is deprecated in drupal:10.4.x and will be removed from drupal:12.0.0.',

        });

      }

      // Trigger a global event to allow scripts to bind events to the dialog.

      const event = new DrupalDialogEvent('beforecreate', dialog, settings);

      domElement.dispatchEvent(event);