| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <title>View transitions: Modify style via CSSOM</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/"> |
| <link rel="author" href="mailto:bokan@chromium.org"> |
| <link rel="match" href="modify-style-via-cssom-ref.html"> |
| <script src="/common/reftest-wait.js"></script> |
| <style> |
| #box { |
| width: 100px; |
| height: 100px; |
| background: limegreen; |
| } |
| html::view-transition-group(root) { |
| animation-duration: 300s; |
| } |
| html::view-transition-new(root) { |
| animation: none; |
| opacity: 0; |
| } |
| html::view-transition-old(root) { |
| animation: none; |
| opacity: 1; |
| } |
| </style> |
| <div id="box"></div> |
| |
| <script> |
| failIfNot(document.startViewTransition, "Missing document.startViewTransition"); |
| |
| function rAF() { |
| return new Promise(resolve => requestAnimationFrame(resolve)); |
| } |
| |
| async function runTest() { |
| await document.startViewTransition().ready; |
| await rAF(); |
| await rAF(); |
| |
| // Once the animation is running, ensure modifying style via CSSOM is |
| // effective. |
| const cssSheet = new CSSStyleSheet(); |
| cssSheet.replaceSync(`::view-transition-old(root) { |
| transform: translateY(100px); |
| }`); |
| document.adoptedStyleSheets = [cssSheet]; |
| |
| await rAF(); |
| takeScreenshot(); |
| } |
| onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest)); |
| </script> |
| </html> |
