How to get my button in a dialog click?
for me that submits the node:

(function (window, Drupal, $) {
  Drupal.behaviors.drafter = {
    attach: function attach(context) {
      var button = $('#edit-submit');
      var newbutton = button.clone().prop('id', 'edit-submit-drafter');
      var confirmationDialog = Drupal.dialog('#drafter-elements', {
        resizable: false,
        closeOnEscape: false,
        create: function () {
          $(this).append(newbutton);
        },
        beforeClose: false,
        close: function (event) {
          $(event.target).remove();
        }
      });
      newbutton.click(function (e) {
        button.click();
        confirmationDialog.close();
        return true;
      });
      button.click(function () {
        if (!confirmationDialog.open) {
          confirmationDialog.showModal();
          return false;
        }
      });
    }
  }
})(window, Drupal, jQuery);