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<!doctype html>
<title>Container Relative Units: Shadow DOM</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-lengths">
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-queries">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/declarative-shadow-dom-polyfill.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#outer {
container-type: size;
width: 200px;
height: 200px;
}
#direct {
container-type: inline-size;
width: 50cqw;
height: 50cqh;
}
#nondirect {
width: 10cqw;
height: 10cqh;
background: green;
}
</style>
<div id=outer>
<div>
<template shadowroot="open">
<style>
#inner {
container-type: size;
width: 30px;
height: 30px;
}
</style>
<div id=inner>
<slot></slot>
</div>
</template>
<div>
<div id=direct>
<div id=nondirect>
</div>
</div>
</div>
</div>
</div>
<script>
setup(() => {
assert_implements_container_queries();
polyfill_declarative_shadow_dom(document);
});
test(() => {
let cs = getComputedStyle(direct);
assert_equals(cs.width, '100px');
assert_equals(cs.height, '100px');
}, 'Direct slotted child queries shadow-including ancestors');
test(() => {
let cs = getComputedStyle(nondirect);
assert_equals(cs.width, '10px'); // #direct
assert_equals(cs.height, '20px'); // #outer
}, 'Nondirect slotted child queries shadow-including ancestors');
</script>
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