| <!DOCTYPE html> |
| <html class=reftest-wait> |
| <title>View transitions: new element is modified while offscren and brought onscreen using pseudo</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="offscreen-element-modified-before-coming-onscreen-ref.html"> |
| |
| <script src="/common/reftest-wait.js"></script> |
| <style> |
| #target { |
| width: 100px; |
| height: 100px; |
| view-transition-name: target; |
| position: fixed; |
| background: green; |
| left: 0; |
| top: 200vh; |
| } |
| |
| .hidden { |
| width: 10px; |
| height: 10px; |
| background: grey; |
| view-transition-name: hidden; |
| } |
| |
| .onscreen::view-transition-group(target) { |
| transform: unset; |
| position: fixed; |
| top: 0; |
| left: 0; |
| animation: unset; |
| } |
| |
| html::view-transition-group(hidden) { animation-duration: 300s; } |
| html::view-transition-image-pair(hidden) { animation: unset; opacity: 0; } |
| |
| html::view-transition-old(target) { animation: unset; opacity: 0; } |
| html::view-transition-new(target) { animation: unset; opacity: 1; } |
| |
| </style> |
| |
| <div id=target class=target> |
| <div id=hidden class=hidden></div> |
| |
| <script> |
| failIfNot(document.startViewTransition, "Missing document.startViewTransition"); |
| |
| function bringOnscreenAndScreenshot() { |
| document.documentElement.classList.add("onscreen"); |
| |
| requestAnimationFrame(() => requestAnimationFrame(() => |
| requestAnimationFrame(() => requestAnimationFrame(takeScreenshot)) |
| )); |
| } |
| |
| async function runTest() { |
| // Start the transition while the element is offscreen. |
| let transition = document.startViewTransition(); |
| await transition.ready; |
| |
| // Change the element's color while its still offscreen. |
| target.style.background = "blue"; |
| |
| // Bring the element onscreen and ensure the color change is presented. |
| requestAnimationFrame(() => requestAnimationFrame(() => |
| requestAnimationFrame(() => requestAnimationFrame( |
| bringOnscreenAndScreenshot)) |
| )); |
| } |
| onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest)); |
| </script> |
| |