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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-anchor-position/anchor-scroll-update-004.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait">
<title>Anchored elements should update location on anchor's layout changes</title>
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="match" href="reference/anchor-scroll-ref.html">
<link rel="stylesheet" href="/fonts/ahem.css">
<style>
body {
font: 20px/1 Ahem;
margin: 0;
}
#scroll-container {
width: 400px;
height: 400px;
overflow: scroll;
}
#scroll-contents {
width: 1000px;
height: 1000px;
position: relative;
}
#anchor {
anchor-name: --anchor;
}
#placefiller-above-anchor {
height: 800px;
}
.after #placefiller-above-anchor {
height: 500px;
}
#placefiller-before-anchor {
display: inline-block;
width: 800px;
}
.after #placefiller-before-anchor {
width: 500px;
}
#inner-anchored {
color: green;
position: absolute;
left: anchor(left);
bottom: anchor(top);
position-anchor: --anchor;
}
#outer-anchored {
color: yellow;
position: absolute;
left: anchor(left);
top: anchor(bottom);
position-anchor: --anchor;
}
</style>
<div style="position: relative">
<div id="scroll-container">
<div id="scroll-contents">
<div id="placefiller-above-anchor"></div>
<div id="placefiller-before-anchor"></div>
<span id="anchor">anchor</span>
<div id="inner-anchored">inner-anchored</div>
</div>
</div>
<div id="outer-anchored">outer-anchored</div>
</div>
<script>
const scroller = document.getElementById('scroll-container');
scroller.scrollTop = 300;
scroller.scrollLeft = 450;
function raf() {
return new Promise(resolve => requestAnimationFrame(resolve));
}
async function runTest() {
await raf();
await raf();
document.getElementById('scroll-contents').classList.add('after');
document.documentElement.classList.remove('reftest-wait');
}
runTest();
</script>
</html>