Same name and namespace in other branches
  1. 7.x modules/system/system.api.php \hook_ajax_render_alter()
  2. 8.9.x core/lib/Drupal/Core/Form/form.api.php \hook_ajax_render_alter()
  3. 9 core/lib/Drupal/Core/Form/form.api.php \hook_ajax_render_alter()

Alter the Ajax command data that is sent to the client.

Parameters

\Drupal\Core\Ajax\CommandInterface[] $data: An array of all the rendered commands that will be sent to the client.

Related topics

Hooks
Define functions that alter the behavior of Drupal core.

File

core/lib/Drupal/Core/Form/form.api.php, line 156
Callbacks and hooks related to form system.

Code

function hook_ajax_render_alter(array &$data) {

  // Inject any new status messages into the content area.
  $status_messages = [
    '#type' => 'status_messages',
  ];
  $command = new \Drupal\Core\Ajax\PrependCommand('#block-system-main .content', \Drupal::service('renderer')
    ->renderRoot($status_messages));
  $data[] = $command
    ->render();
}