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<!DOCTYPE html>
<html>
<title>View transitions: validates that view-transition-name: unset or initial are ignored</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>
#first {
width: 100px;
height: 100px;
background: blue;
contain: paint;
view-transition-name: target;
}
#second {
width: 100px;
height: 100px;
background: blue;
view-transition-name: unset;
}
#third {
width: 100px;
height: 100px;
background: blue;
view-transition-name: initial;
}
</style>
<div id=first></div>
<div id=second></div>
<div id=third></div>
<script>
promise_test(async t => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise(async (resolve, reject) => {
let transition = document.startViewTransition();
await transition.updateCallbackDone;
// Elements with view-transition-name: initial and unset don't have
// containment. Because they are ignored they don't cause the transition to
// be skipped.
await transition.ready;
transition.finished.then(resolve, reject);
});
}, "validates that view-transition-name: unset or initial are ignored");
</script>
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