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<!DOCTYPE html>
<html class=reftest-wait>
<title>anchor() resolution in position-area</title>
<link rel="help" href="https://www.w3.org/TR/css-anchor-position/#position-area">
<link rel="match" href="position-area-anchor-002-ref.html">
<link rel="author" name="David Shin" href="mailto:dshin@mozilla.com">
<style>
.abs-cb {
width: 180px;
height: 180px;
position: relative;
border: 5px solid;
}
.scroller {
width: 100%;
height: 100%;
overflow: scroll;
}
.anchor {
width: 60px;
height: 60px;
margin-left: 60px;
anchor-name: --a;
background: pink;
}
.filler {
width: 1px;
height: 180px;
}
.positioned {
width: 30px;
height: 30px;
background: purple;
position: absolute;
position-anchor: --a;
}
.tl {
position-area: top left;
right: anchor(left);
bottom: anchor(top);
}
.tr {
position-area: top right;
left: anchor(right);
bottom: anchor(top);
}
.bl {
position-area: bottom left;
right: anchor(left);
top: anchor(bottom);
}
.br {
position-area: bottom right;
left: anchor(right);
top: anchor(bottom);
}
.dn {
display: none;
}
</style>
<div class=abs-cb>
<div id=s class=scroller>
<div class=filler></div>
<div class=anchor></div>
<div class=filler></div>
<div class="positioned tl dn"></div>
<div class="positioned tr dn"></div>
<div class="positioned bl dn"></div>
<div class="positioned br dn"></div>
</div>
</div>
<script>
function raf() {
return new Promise(resolve => requestAnimationFrame(resolve));
}
async function runTest() {
s.scrollTop = 120;
await raf();
await raf();
for(const e of s.querySelectorAll('.positioned')) {
e.classList.remove('dn');
}
document.documentElement.classList.remove('reftest-wait');
}
runTest();
</script>
</html>
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