| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <title>View transitions: setup transition from pagereveal</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/"> |
| <link rel="author" href="mailto:bokan@chromium.org"> |
| <link rel="match" href="pagereveal-setup-transition-ref.html"> |
| <script src="/common/reftest-wait.js"></script> |
| <script> |
| const params = new URLSearchParams(location.search); |
| const is_new_page = params.has('new'); |
| if (is_new_page) { |
| document.documentElement.classList.add('newPage'); |
| |
| addEventListener('pagereveal', e => { |
| // Setup the view-transition-name from the event. Ensure this is not |
| // too late to be discovered to create a shared element animation. |
| document.getElementById('target').classList.add('transition'); |
| requestAnimationFrame(() => requestAnimationFrame(takeScreenshot)); |
| }); |
| } else { |
| onload = () => { |
| document.getElementById('target').classList.add('transition'); |
| requestAnimationFrame(() => requestAnimationFrame(() => { |
| location.replace(location.href + '?new'); |
| })); |
| }; |
| } |
| </script> |
| <style> |
| @view-transition { |
| navigation: auto; |
| } |
| #target { |
| width: 100px; |
| height: 100px; |
| background-color: limegreen; |
| position: absolute; |
| left: 20px; |
| top: 100px; |
| } |
| #target.transition { |
| view-transition-name: target; |
| } |
| .newPage #target { |
| left: 300px; |
| } |
| /* Hold the transition in the ending location indefinitely. If the transition |
| * name was correctly captured in the new page, this will cause the green box |
| * to locate at the new position (left: 300px) */ |
| ::view-transition-group(target) { |
| animation-duration: 300s; |
| animation-timing-function: steps(1, jump-start); |
| } |
| /* Ensure view-transition snapshots are easily distinguished from live DOM */ |
| :root { |
| view-transition-name: unset; |
| } |
| ::view-transition { |
| background-color: thistle; |
| } |
| </style> |
| <div id="target"></div> |
| </html> |
