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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-view-transitions/navigation/at-rule-opt-in-change-with-script.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>View Transitions: @view-transition opt-in programmatically.</title>
<link rel="author" href="mailto:bokan@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style id="vt-style">
@view-transition {
navigation: none;
}
</style>
<script>
function optIn() {
document.querySelector("#vt-style").innerHTML = `@view-transition { navigation: auto }`;
}
const params = new URLSearchParams(location.search);
const is_new_page = params.has('new');
if (!is_new_page) {
onload = () => requestAnimationFrame(() => requestAnimationFrame(() => {
optIn();
location.replace(location.href + '?new');
}));
} else {
promise_test(() => {
optIn();
return new Promise((resolve) => {
addEventListener('pagereveal', resolve);
}).then(event => {
assert_not_equals(event.viewTransition, null,
"ViewTransition must be triggered.");
});
});
}
</script>