--- /dev/null
+/**
+ * Implements hook_page_attachments().
+ */
+function {{ machine_name }}_page_attachments(array &$attachments) {
+ // Unconditionally attach an asset to the page.
+ $attachments['#attached']['library'][] = 'core/domready';
+
+ // Conditionally attach an asset to the page.
+ if (!\Drupal::currentUser()->hasPermission('may pet kittens')) {
+ $attachments['#attached']['library'][] = 'core/jquery';
+ }
+}