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<!DOCTYPE html>
<html class=reftest-wait>
<title>Tests 'position-anchor' property when target visibility changes</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#position-anchor">
<link rel="author" href="mailto:plampe@igalia.com">
<link rel="match" href="position-anchor-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
.anchor {
width: 100px;
height: 100px;
background: orange;
font: 20px/1 Ahem;
}
.target {
position: fixed;
width: 100px;
height: 100px;
background: lime;
top: anchor(bottom);
left: anchor(left);
font: 20px/1 Ahem;
}
body {
margin: 0;
}
#anchor1 {
anchor-name: --a1;
margin-left: 100px;
}
#target1 {
position-anchor: --a1;
}
#anchor2 {
anchor-name: --a2;
margin-left: 300px;
margin-top: 100px;
}
#target2 {
position-anchor: --a2;
}
</style>
<div id="anchor1" class="anchor">anchor1</div>
<div id="anchor2" class="anchor">anchor2</div>
<div id="target1" class="target">target1</div>
<div id="target2" class="target">target2</div>
<script>
// #target2 should be initially visible.
waitForAtLeastOneFrame().then(() => {
// Change #target2 to be invisible.
document.getElementById('target2').style.display = 'none';
waitForAtLeastOneFrame().then(() => {
// #target2 should be invisible now.
// Change #target2 to be visible.
document.getElementById('target2').style.display = 'flow';
waitForAtLeastOneFrame().then(() => {
// #target2 should be visible and anchor-positioned again now.
takeScreenshot();
});
});
});
</script>
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