| <!DOCTYPE html> |
| <title>View Transitions: @view-transition not applied from shadow tree.</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/"> |
| <link rel="author" href="mailto:bokan@chromium.org"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| const params = new URLSearchParams(location.search); |
| |
| switch (params.get("mode") || "test") { |
| case "test": |
| promise_test(async t => { |
| const event = await new Promise(resolve => { |
| window.did_reveal = e => { resolve(e) }; |
| const popup = window.open("?mode=old"); |
| t.add_cleanup(() => popup.close()); |
| }); |
| |
| assert_equals(event.viewTransition, null, "ViewTransition must not be triggered."); |
| }); |
| break; |
| case "old": |
| onload = () => { |
| const host = document.querySelector("#host"); |
| const shadow = host.attachShadow({ mode: "open" }); |
| // Can't use the opt-in from shadow DOM on the new page since the opt-in must |
| // be effective by the time the <body> element is parsed and only elements in |
| // <body> can be a shadow root. |
| const style = document.createElement("style"); |
| style.textContent = `@view-transition { |
| navigation: auto; |
| }`; |
| shadow.appendChild(style); |
| requestAnimationFrame(() => requestAnimationFrame(() => { |
| location.replace('?mode=new'); |
| })); |
| }; |
| case "new": |
| onpagereveal = e => window.opener.did_reveal(e); |
| break; |
| } |
| </script> |
| <div id="host"></div> |
