Drupal → Добавить в хлебные крошки заголовок текущей страницы

use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 
/**
 * Preprocess function for breadcrumb.html.twig.
 */
function THEMENAME_preprocess_breadcrumb(&$variables) {
  if ($variables['breadcrumb']) {
    $request = \Drupal::request();
    $route = $request->attributes->get(RouteObjectInterface::ROUTE_OBJECT);
    $page_title = \Drupal::service('title_resolver')->getTitle($request, $route);
 
    $variables['breadcrumb'][] = ['text' => $page_title];
    $variables['#cache']['contexts'][] = 'url';
  }
}

use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 
/**
 * Preprocess function for breadcrumb.html.twig.
 */
function THEMENAME_preprocess_breadcrumb(&$vars) {
  if ($vars['breadcrumb']) {
    $vars['breadcrumb'][] = [
      'text' => [
        '#lazy_builder' => ['THEMENAME_breadcrumb_page_title', []],
        '#create_placeholder' => TRUE,
      ]
    ];
  }
}
 
/**
 * Breadcrumb page title lazy builder.
 */
function THEMENAME_breadcrumb_page_title() {
  $request = \Drupal::request();
  $route = $request->attributes->get(RouteObjectInterface::ROUTE_OBJECT);
  $page_title = \Drupal::service('title_resolver')->getTitle($request, $route);
  return ['#markup' => $page_title];
}