/**
 * Implements hook_js_settings_alter().
 */
function {{ machine_name }}_js_settings_alter(array &$settings, \Drupal\Core\Asset\AttachedAssetsInterface $assets) {
  // Add settings.
  $settings['user']['uid'] = \Drupal::currentUser();

  // Manipulate settings.
  if (isset($settings['dialog'])) {
    $settings['dialog']['autoResize'] = FALSE;
  }
}