Resolve #3397446 "Attach library with command"

Closes #3397446

src/Ajax/PageReloadCommand.php

@@ -3,11 +3,13 @@
 namespace Drupal\ajax_command_page_reload\Ajax;
 
 use Drupal\Core\Ajax\CommandInterface;
+use Drupal\Core\Ajax\CommandWithAttachedAssetsInterface;
+use Drupal\Core\Asset\AttachedAssets;
 
 /**
  * Trigger "window.location.reload()" within the frontend.
  */
-class PageReloadCommand implements CommandInterface {
+class PageReloadCommand implements CommandInterface, CommandWithAttachedAssetsInterface {
 
   /**
    * {@inheritdoc}
@@ -18,4 +20,13 @@ class PageReloadCommand implements CommandInterface {
     ];
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getAttachedAssets() {
+    $assets = new AttachedAssets();
+    $assets->setLibraries(['ajax_command_page_reload/ajax_commands']);
+    return $assets;
+  }
+
 }