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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/">
<meta name="timeout" content="long">
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/page-visibility/resources/window_state_context.js"></script>
<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,
"Transition should have been skipped when document was minimized");
});
break;
case "old":
onload = () => requestAnimationFrame(() => requestAnimationFrame(() => {
location.replace('?mode=new');
}));
break;
case "new":
const render_blocker = document.createElement("script");
render_blocker.blocking = "render";
render_blocker.src = "/loading/resources/dummy.js?pipe=trickle(d10)";
render_blocker.type = "module";
document.head.append(render_blocker);
addEventListener('pagereveal', e => window.opener.did_reveal(e));
test_driver.minimize_window().then(rect => {
render_blocker.remove();
test_driver.set_window_rect(rect);
});
break;
}
</script>
<style>
@view-transition {
navigation: auto;
}
</style>
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