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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-view-transitions/navigation/at-rule-in-shadow-dom.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>View Transitions: @view-transition not applied from shadow tree.</title>
<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>