| <!DOCTYPE html> |
| <meta name="timeout" content="long"> |
| <html> |
| <title>View transitions: rAF is not issued while render-blocked</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/"> |
| <link rel="author" href="mailto:khushalsagar@chromium.org"> |
| |
| <script src="/dom/events/scrolling/scroll_support.js"></script> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <style> |
| div { |
| width: 100px; |
| height: 100px; |
| background: blue; |
| contain: paint; |
| view-transition-name: target; |
| } |
| </style> |
| |
| <div id=target></div> |
| |
| <script> |
| let renderBlocked = true; |
| |
| promise_test(async () => { |
| assert_implements(document.startViewTransition, "Missing document.startViewTransition"); |
| await waitForCompositorReady(); |
| return new Promise(async (resolve, reject) => { |
| requestAnimationFrame(() => { |
| document.startViewTransition(() => { |
| return new Promise(async (inner_resolve) => { |
| step_timeout(() => { |
| renderBlocked = false; |
| inner_resolve(); |
| }, 1000); |
| }); |
| }); |
| |
| requestAnimationFrame(() => { |
| if (renderBlocked) |
| reject(); |
| else |
| resolve(); |
| }); |
| }); |
| }); |
| }, "rAF is blocked until prepare callback"); |
| </script> |
