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Test Info:
- 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);
const is_new_page = params.has('new');
if (!is_new_page) {
onload = () => {
const host = document.querySelector("#host");
const shadow = host.attachShadow({ mode: "open" });
const style = document.createElement("style");
style.textContent = `@view-transition {
navigation: auto;
}`;
shadow.appendChild(style);
requestAnimationFrame(() => requestAnimationFrame(() => {
location.replace(location.href + '?new');
}));
};
} else {
// 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;
}`;
document.head.appendChild(style);
promise_test(() => {
return new Promise((resolve) => {
addEventListener('pagereveal', resolve);
}).then(event => {
assert_equals(event.viewTransition, null,
"ViewTransition must not be triggered.");
});
});
}
</script>
<div id="host"></div>