| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <meta name="timeout" content="long"> |
| <title>Screen wake locks respect page visibility changes</title> |
| <link rel="help" href="https://w3c.github.io/screen-wake-lock/#handling-document-loss-of-visibility"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| |
| promise_test(async t => { |
| const screenWakeLock = await navigator.wakeLock.request('screen'); |
| assert_false(screenWakeLock.released, "The released attribute is initially false") |
| const screenWakeLockReleased = |
| new EventWatcher(t, screenWakeLock, "release").wait_for("release"); |
| |
| const eventWatcher = new EventWatcher(t, document, "visibilitychange"); |
| await eventWatcher.wait_for("visibilitychange"); |
| assert_true(document.hidden, "document is hidden after the visibilitychange event"); |
| await screenWakeLockReleased; |
| assert_true(screenWakeLock.released, "The released attribute is true after the lock is released"); |
| await promise_rejects_dom(t, "NotAllowedError", navigator.wakeLock.request('screen'), |
| "new screen locks are not allowed when the page is not visible"); |
| |
| await eventWatcher.wait_for("visibilitychange"); |
| assert_false(document.hidden, "document is no longer hidden after the visibilitychange event"); |
| }, "Test screen locks respect page visibility changes"); |
| |
| </script> |
| |
| <p>Switch the page to the background, then switch back to it.</p> |
