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<!DOCTYPE html>
<title>View Transitions: @view-transition cascaldes correclty with layers in separate external stylesheets.</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>
@layer inertA, inertB, active;
</style>
<style>
@import "resources/opt-out-style.css" layer(inertA);
</style>
<style>
@import "resources/opt-in-style.css" layer(active);
</style>
<style>
@import "resources/opt-out-style.css" layer(inertB);
</style>
<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_not_equals(event.viewTransition, null, "ViewTransition must be triggered.");
});
break;
case "old":
onload = () => requestAnimationFrame(() => requestAnimationFrame(() => {
location.replace('?mode=new');
}));
break;
case "new":
onpagereveal = e => window.opener.did_reveal(e);
break;
}
</script>
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