Issue #3492582 by tom konda, zaryab_drupal, nod_, smustgrave: Replace some of...

    // If there isn't a form, jQuery.ajax() will be used instead, allowing us to

    // bind Ajax to links as well.

    if (this.element && this.element.form) {

    if (this.element?.form) {

      /**

       * @type {jQuery}

       */

      (executionQueue, key) =>

        executionQueue.then(() => {

          const { command } = response[key];

          if (command && ajaxCommands[command]) {

          if (ajaxCommands?.[command]) {

            // When a command returns a promise, the remaining commands will not

            // execute until that promise has been fulfilled. This is typically

            // used to ensure JavaScript files added via the 'add_js' command

      xhr.getResponseHeader('X-Drupal-Ajax-Token') === '1' &&

      // The isInProgress() function might not be defined if the Ajax request

      // was initiated without Drupal.ajax() or new Drupal.Ajax().

      settings.isInProgress &&

      // Until this is false, the Ajax request isn't completely done (the

      // response's commands might still be running).

      settings.isInProgress()

      settings?.isInProgress()

    );

  };

  $.extend(true, $.event.special, {

        }

        // Skip processing upon a form validation error on a non-empty

        // machine name.

        if (

          $target.hasClass('error') &&

          $target[0].value &&

          $target[0].value.trim().length

        ) {

        if ($target.hasClass('error') && $target[0].value?.trim().length) {

          return;

        }

        // Figure out the maximum length for the machine name.

      const response = xhr.response;

      if (!response || response.error) {

        return reject(

          response && response.error && response.error.message

            ? response.error.message

            : genericErrorText,

        );

        return reject(response?.error?.message || genericErrorText);

      }

      // Resolve with the `urls` property and pass the response

      // to allow customizing the behavior of features relying on the upload adapters.