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<!DOCTYPE html>
<html >
<title>View transitions: generated names should not be visible from 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)));
assert_array_equals(pseudos,
[
"::view-transition-group(match-element)",
"::view-transition-new(match-element)",
"::view-transition-old(match-element)"]);
}, "Generated view-transition-names should not be reflected in script");
</script>
</body>
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