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<!DOCTYPE html>
<html >
<title>View transitions: generated names should be prefixed with -ua- in script</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
:root {
view-transition-name: none;
}
div {
width: 100px;
height: 100px;
}
main {
display: flex;
flex-direction: column;
}
.item1 {
view-transition-name: auto;
}
.item2 {
view-transition-name: match-element;
}
main.switch .item1 {
order: 2;
}
.item1 {
background: green;
}
.item2 {
background: yellow;
position: relative;
left: 100px;
}
</style>
<main>
<div class="item item1"></div>
<div class="item item2"></div>
</main>
<script>
promise_test(async t => {
await new Promise(resolve => requestAnimationFrame(() => resolve()));
await document.startViewTransition(() => {
document.querySelector("main").classList.add("switch");
}).ready;
const animations = document.documentElement.getAnimations({subtree: true});
const pseudos = Array.from(new Set(animations.map(a => a.effect.pseudoElement)));
const item1GeneratedName = pseudos[0].replace("::view-transition-group(", "").slice(0, -1);
const item2GeneratedName = pseudos[3].replace("::view-transition-group(", "").slice(0, -1);
assert_true(item1GeneratedName.startsWith("-ua-"), "Item 1 generated name starts with -ua-");
assert_true(item2GeneratedName.startsWith("-ua-"), "Item 2 generated name starts with -ua-");
assert_array_equals(pseudos,
[
`::view-transition-group(${item1GeneratedName})`,
`::view-transition-old(${item1GeneratedName})`,
`::view-transition-new(${item1GeneratedName})`,
`::view-transition-group(${item2GeneratedName})`,
`::view-transition-old(${item2GeneratedName})`,
`::view-transition-new(${item2GeneratedName})`
], "Generated names should start with -ua- and pseudo-elements should be in tree order");
}, "Generated view-transition-names should be prefixed with -ua- in script");
</script>
</body>
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