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<!DOCTYPE html>
<title>Tests that 'position-anchor' property value is tree-scoped</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#position-anchor">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="match" href="position-anchor-ref.html">
<style>
.anchor {
width: 100px;
height: 100px;
background: orange;
}
.target {
position: fixed;
background: lime;
position-try-options: --pf;
left: 999999px; /* force fallback */
}
@position-try --pf {
top: anchor(bottom, 0px);
left: anchor(left, 0px);
width: anchor-size(width, 0px);
height: anchor-size(height, 0px);
}
body {
margin: 0;
}
#fake-anchor {
anchor-name: --a;
}
#anchor1 {
margin-left: 100px;
}
#anchor2 {
margin-left: 300px;
margin-top: 100px;
}
</style>
<div id="fake-anchor"></div>
<div id="anchor1" class="anchor">
anchor1
<div id="target1" class="target">target1</div>
</div>
<div id="anchor2" class="anchor">
anchor2
<div id="target2" class="target">target2</div>
</div>
<script>
for (let host of document.querySelectorAll('.anchor')) {
let shadow = host.attachShadow({mode: 'open'});
shadow.innerHTML = `
<style>
:host { anchor-name: --a; }
::slotted(.target) { position-anchor: --a; }
</style>
<slot></slot>
`;
}
</script>
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