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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-anchor-position/position-visibility-anchor-valid-dynamic.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="utf-8">
<link rel="author" href="mailto:masonf@chromium.org">
<link rel="match" href="position-visibility-anchor-valid-dynamic-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
.container {
position: relative;
width: 50px;
height: 100px;
display: inline-grid;
vertical-align: top;
margin: 5px;
}
.anchor {
width: 50px;
height: 50px;
background: orange;
}
.red {
background: red;
}
.green {
background: green;
}
.target {
position: absolute;
position-visibility: anchor-valid;
width: 50px;
height: 50px;
}
</style>
<!-- Case 1: starts invalid (hidden), dynamically becomes valid (visible) -->
<div class="container red">
<div id="anchor1" class="anchor"></div>
<div id="target1" class="target green" style="position-anchor: --a1; position-area: bottom; inset: 0;"></div>
</div>
<!-- Case 2: starts valid (visible), dynamically becomes invalid (hidden) -->
<div class="container green">
<div id="anchor2" class="anchor" style="anchor-name: --a2;"></div>
<div id="target2" class="target red" style="position-anchor: --a2; position-area: bottom; inset: 0;"></div>
</div>
<script>
requestAnimationFrame(() => {
requestAnimationFrame(() => {
// 1. Make anchor1 valid -> target1 should appear and cover the red.
anchor1.style.anchorName = '--a1';
// 2. Make anchor2 invalid -> target2 should disappear and reveal the green.
anchor2.style.anchorName = 'none';
takeScreenshot();
});
});
</script>
</html>