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<!DOCTYPE html>
<title>CSS Anchor Positioning: anchor-name is style contained - dynamic containment</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#name">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/test-common.js"></script>
<style>
.container {
position: relative;
}
.anchor {
width: 100px;
height: 100px;
anchor-name: var(--anchor-name);
}
.contain-style {
contain: style;
}
.target {
position: absolute;
anchor-default: var(--anchor-name);
top: anchor(bottom, 50px);
}
#a1 { --anchor-name: --a1; }
#a2 { --anchor-name: --a2; }
#a3 { --anchor-name: --a3; }
</style>
<div id="a1" class="container">
<div class="anchor"></div>
<div class="contain-style">
<div class="anchor"></div>
</div>
<div class="target" data-offset-y="100"></div>
</div>
<div id="a2" class="container">
<div class="anchor"></div>
<div class="anchor"></div>
<div class="contain-style">
<div class="target" data-offset-y="50"></div>
</div>
</div>
<div id="a3" class="container">
<div class="anchor contain-style">
<div class="target" data-offset-y="50"></div>
</div>
</div>
<script type="module">
await checkLayoutForAnchorPos('.target');
const t1 = document.querySelector("#a1 .target");
const t2 = document.querySelector("#a2 .target");
const t3 = document.querySelector("#a3 .target");
const t4 = document.querySelector("#a4 .target");
const t5 = document.querySelector("#a5 .target");
t1.setAttribute("data-offset-y", "200");
t2.setAttribute("data-offset-y", "200");
t3.setAttribute("data-offset-y", "100");
for (let element of document.querySelectorAll(".contain-style")) {
element.style.contain = "none";
}
await checkLayoutForAnchorPos('.target');
t1.setAttribute("data-offset-y", "100");
t2.setAttribute("data-offset-y", "50");
t3.setAttribute("data-offset-y", "50");
for (let element of document.querySelectorAll(".contain-style")) {
element.style.contain = "";
}
await checkLayoutForAnchorPos('.target');
</script>
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