| <!DOCTYPE html> |
| <title>View transitions: Transition in a hidden page</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/"> |
| <meta name="timeout" content="long"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/page-visibility/resources/window_state_context.js"></script> |
| <style> |
| ::view-transition-group(*) { |
| animation-duration: 5s; |
| } |
| </style> |
| <script> |
| promise_test(async t => { |
| assert_implements(document.startViewTransition, "Missing document.startViewTransition"); |
| |
| const wsc = window_state_context(t); |
| await wsc.minimize(); |
| assert_true(document.hidden); |
| const transition = document.startViewTransition(); |
| await wsc.restore(); |
| const [readyResult] = await Promise.allSettled([transition.ready]); |
| assert_equals(readyResult.status, "rejected"); |
| }, "A view transition should be immediately skipped if started when document is hidden"); |
| |
| promise_test(async t => { |
| assert_implements(document.startViewTransition, "Missing document.startViewTransition"); |
| |
| const wsc = window_state_context(t); |
| const transition = document.startViewTransition(async () => { |
| await wsc.minimize(); |
| }); |
| |
| let event_fired = false; |
| |
| window.addEventListener("visibilitychange", () => { |
| if (document.hidden) |
| event_fired = true; |
| }); |
| |
| // Restoring so that the document has an opportunity to present the real |
| // frame and start the transition's animation. |
| await wsc.restore(); |
| |
| const [readyResult] = await Promise.allSettled([transition.ready]); |
| assert_true(event_fired, "visibilitychange event should fire before skipping the transition"); |
| await transition.finished; |
| assert_equals(readyResult.status, "rejected"); |
| }, "A view transition should be skipped when a document becomes hidden while processing update callback"); |
| |
| promise_test(async t => { |
| assert_implements(document.startViewTransition, "Missing document.startViewTransition"); |
| assert_false(document.hidden); |
| const wsc = window_state_context(t); |
| const transition = document.startViewTransition(() => { }); |
| await transition.ready; |
| await new Promise(resolve => requestAnimationFrame(resolve)); |
| await wsc.minimize(); |
| const result = await new Promise(resolve => { |
| transition.finished.then(() => resolve("finished")); |
| t.step_timeout(() => resolve("timeout"), 1000); |
| }); |
| |
| assert_equals(result, "finished"); |
| }, "A view transition should be skipped when a document becomes hidden while animating"); |
| </script> |
| </body> |
| |
| </html> |