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<!DOCTYPE html>
<html>
<title>View transitions: transition skipped if no containment on new element</title>
<link rel="help" href="https://www.w3.org/TR/css-view-transitions-1/">
<link rel="author" href="mailto:khushalsagar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
div {
width: 100px;
height: 100px;
background: blue;
view-transition-name: target;
contain: paint;
}
</style>
<div id=first></div>
<script>
promise_test(async t => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise(async (resolve, reject) => {
let transition = document.startViewTransition(() => {
first.style.contain = "none";
});
let readyRejected = false;
transition.ready.then(reject, () => { readyRejected = true; });
let domUpdated = false;
transition.domUpdated.then(() => { domUpdated = true; }, reject);
transition.finished.then(() => {
assert_true(readyRejected, "ready not rejected");
assert_true(domUpdated, "dom not updated");
if (window.getComputedStyle(first).contain == "none")
resolve();
else
reject("dom update callback did not run");
}, reject);
});
}, "uncontained new element should skip the transition");
</script>
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