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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<!-- TODO update link -->
<link rel="help" href="https://www.w3.org/TR/css-view-transitions-2/">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Missing view transition name</title>
</head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-view-transitions/support/common.js"></script>
<style>
#target {
background-color: blue;
width: 100px;
height: 100px;
}
</style>
<body>
<div id="target"></div>
</body>
<script>
promise_test(async () => {
const target = document.getElementById('target');
const vt1 = document.startViewTransition(() => {
target.style.opacity = 0.5;
});
await vt1.ready;
const vt2 = target.startViewTransition(() => {
target.style.backgroundColor = 'green';
});
await vt2.ready;
const expected_root_pseudos = [
'::view-transition-group(root)',
'::view-transition-new(root)',
'::view-transition-old(root)'
];
const expected_target_pseudos = [
'::view-transition-group(root)',
'::view-transition-new(root)',
'::view-transition-old(root)'
];
assert_animation_pseudos(
document.documentElement, expected_root_pseudos,
'Document element has animation-name: root by default');
assert_animation_pseudos(
target, expected_target_pseudos,
'No implicit view-transition name for scoped view transition');
}, 'Scoped view transition excludes animations for root element');
</script>
</html>
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