Get the route name of the current page

Question

The route name of the current page is available in page.html.twig? The page is generated by the default feedback form.

Answer 1

To get the current route name, use:

$route_name = \Drupal::routeMatch()->getRouteName();

You can add the current page's route name as a variable in your theme's ".theme" file. Add a _preprocess_page function like this, and clear the drupal cache.

/**
 * Implements hook_preprocess_page().
 *
 */
function mytheme_preprocess_page(&$variables) {
  $variables['route_name'] = \Drupal::routeMatch()->getRouteName();
}

Then you can access in page.html.twig like this:

{{ route_name }}

Note: \Drupal::routeMatch()->getRouteName() will sometimes return null.

If you are inside a class, to do things properly, you'll want to inject the route match service in the constructor and then call it this way:

$this->currentRouteMatch->getRouteName()

The constructor (and variable) will be like this:

  /**
   * The current route match.
   *
   * @var \Drupal\Core\Routing\RouteMatchInterface
   */
  protected $currentRouteMatch;

  /**
   * Constructs a new ThemeTestSubscriber.
   *
   * @param \Drupal\Core\Routing\RouteMatchInterface $current_route_match
   */
  public function __construct(RouteMatchInterface $current_route_match) {
    $this->currentRouteMatch = $current_route_match;
  }

If it's a service class, you'd then pass it into the service in the yaml file in your custom module:

services:
  mymodule.service:
    class: Drupal\mymodule\MyCustomService
    arguments: ['@current_route_match']