| <!DOCTYPE html> |
| <html class=reftest-wait> |
| <title>View transitions: use snapshot containing block for static position in iframe</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/#snapshot-containing-block-concept/"> |
| <link rel="match" href="snapshot-containing-block-static-iframe-ref.html"> |
| |
| <script src="/common/reftest-wait.js"></script> |
| <script src="/common/rendering-utils.js"></script> |
| |
| <style> |
| #inner { |
| width: 400px; |
| height: 200px; |
| } |
| </style> |
| <iframe id="inner" srcdoc=" |
| <style> |
| body { |
| height: 200vh; |
| overflow: hidden; |
| } |
| ::view-transition { |
| position: static; |
| display: block; |
| width: 100%; |
| height: 100%; |
| background: limegreen; |
| } |
| ::view-transition-group(*), |
| ::view-transition-image-pair(*), |
| ::view-transition-old(*), |
| ::view-transition-new(*) { |
| animation-play-state: paused; |
| } |
| |
| </style> |
| <body></body> |
| "></iframe> |
| <script> |
| failIfNot(document.startViewTransition, "Missing document.startViewTransition"); |
| |
| async function runTest() { |
| // Start the view transition at a scroll offset so that the snapshot |
| // containing block differs from the initial containing block. |
| inner.contentWindow.scrollTo(0, 100); |
| await waitForAtLeastOneFrame(); |
| |
| const contentDocument = inner.contentDocument; |
| let vt = inner.contentDocument.startViewTransition(); |
| await vt.ready; |
| takeScreenshot(); |
| } |
| |
| onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest)); |
| </script> |
