| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <head> |
| <title>View Transitions: No white flash should be visible during the duration of the update callback</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/#ref-for-captured-in-a-view-transition"> |
| <link rel="match" href="no-white-flash-before-activation-ref.html"> |
| <style> |
| body { |
| margin: 0; |
| } |
| div { |
| width: 100vw; |
| height: 100vh; |
| background-color: #000; |
| } |
| </style> |
| </head> |
| <body> |
| <div></div> |
| <script src="/common/reftest-wait.js"></script> |
| <script> |
| failIfNot(document.startViewTransition, "Missing document.startViewTransition"); |
| addEventListener("load", () => { |
| document.startViewTransition(() => { |
| requestAnimationFrame(takeScreenshot); |
| return new Promise(() => {}); |
| }); |
| }); |
| </script> |
| </body> |
| </html> |
