| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>ServiceWorker: navigator.serviceWorker.navigationPreload</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../resources/test-helpers.sub.js"></script> |
| <script src="resources/helpers.js"></script> |
| <script> |
| promise_test(async t => { |
| const SCRIPT = '../resources/empty-worker.js'; |
| const SCOPE = '../resources/navigationpreload'; |
| const registration = |
| await service_worker_unregister_and_register(t, SCRIPT, SCOPE); |
| const navigationPreload = registration.navigationPreload; |
| assert_true(navigationPreload instanceof NavigationPreloadManager, |
| 'ServiceWorkerRegistration.navigationPreload'); |
| await registration.unregister(); |
| }, "The navigationPreload attribute must return service worker " + |
| "registration's NavigationPreloadManager object."); |
| </script> |
