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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-anchor-position/anchor-name-shadow-higher-tree.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Anchor Positioning Module Level 1: anchor-name from higher tree can be referenced in shadow tree</title>
<link rel="author" title="Jack Holden" href="mailto:jack@holdhelm.com">
<meta name="assert" content="A positioned element inside a shadow tree can reference an anchor-name defined in a higher tree.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#host {
anchor-name: --higher-anchor;
background: lightgray;
block-size: 100px;
inline-size: 200px;
margin: 50px;
}
</style>
</head>
<body>
<div id="host">
<template shadowrootmode="open">
<style>
#anchored {
background: green;
block-size: 50px;
inline-size: 50px;
inset-block-start: anchor(--higher-anchor start, 37px);
inset-inline-start: anchor(--higher-anchor end, 37px);
position: absolute;
}
</style>
<div id="anchored"></div>
</template>
</div>
<script>
test(() => {
const host = document.getElementById("host");
const anchored = host.shadowRoot.getElementById("anchored");
const hostRect = host.getBoundingClientRect();
const anchoredRect = anchored.getBoundingClientRect();
// Should be able to reference the higher-tree anchor-name.
assert_equals(anchoredRect.left, hostRect.right,
"positioned element inside shadow tree should resolve anchor-name from higher tree");
}, "anchor() inside a shadow tree can reference an anchor-name defined in a higher tree");
</script>
</body>
</html>