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<!DOCTYPE html>
<title>View transitions: pagereveal event provides viewTransition</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>
<style>
@view-transition {
navigation: auto;
}
</style>
<script>
const params = new URLSearchParams(location.search);
const is_initial_page = !params.has('new');
// This test navigates to itself with a changed query parameter. The test
// checks are performed on the navigated-to document.
if (is_initial_page) {
onload = () => {
requestAnimationFrame(() => requestAnimationFrame(() => {
location.replace(location.href + '?new');
}));
};
} else {
promise_test(async () => {
const ev = await new Promise(
resolve => addEventListener('pagereveal', e => resolve(e)));
assert_not_equals(ev.viewTransition, null,
'Navigation with transition must have a viewTransition.');
assert_true('skipTransition' in ev.viewTransition,
'skipTransition in viewTransition');
assert_true('finished' in ev.viewTransition, 'finished in viewTransition');
assert_true('ready' in ev.viewTransition, 'ready in viewTransition');
assert_true('updateCallbackDone' in ev.viewTransition,
'updateCallbackDone in viewTransition');
});
}
</script>
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