| <!DOCTYPE html> |
| <html class=reftest-wait> |
| <title>View transitions: iframe and main frame transition at the same time</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/"> |
| <link rel="author" href="mailto:khushalsagar@chromium.org"> |
| <link rel="match" href="iframe-and-main-frame-transition-old-main-ref.html"> |
| <script src="/common/reftest-wait.js"></script> |
| <style> |
| iframe { |
| position: fixed; |
| top: 0; |
| left: 0; |
| width: 50vw; |
| height: 50vh; |
| } |
| |
| /* The main frame is showing the old screenshot */ |
| ::view-transition-group(root) { |
| animation-duration: 300s; |
| } |
| ::view-transition-new(root) { |
| animation: unset; |
| opacity: 0; |
| } |
| ::view-transition-old(root) { |
| animation: unset; |
| opacity: 1; |
| } |
| </style> |
| |
| <iframe srcdoc=" |
| <style> |
| body { |
| background: orange; |
| } |
| </style> |
| <body></body>"></iframe> |
| <script> |
| onload = runTest; |
| |
| async function startTransition(document, oldColor, newColor) { |
| document.documentElement.style.background = oldColor; |
| await document.startViewTransition(() => { |
| document.documentElement.style.background = newColor; |
| }).ready; |
| } |
| |
| async function runTest() { |
| await startTransition(document, "green", "lightgreen"); |
| |
| // Start an iframe transition while the main frame transition is showing the |
| // old screenshot. This change shouldn't show up visually because the old |
| // screenshot on the main frame still has the iframe's old content. |
| const iframeDocument = document.querySelector("iframe").contentDocument; |
| await startTransition(iframeDocument, "blue", "lightblue"); |
| |
| takeScreenshot(); |
| } |
| </script> |
| |
