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<!DOCTYPE html>
<title>Tests popovers with implicit anchors in out-of-flow boxes</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#determining">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#propdef-anchor-name">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-size">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<style>
.relpos {
position: relative;
}
.columns {
column-count: 2;
column-fill: auto;
column-gap: 10px;
column-width: 100px;
width: 210px;
height: 50px;
}
#anchor1 {
position: absolute;
width: 10px;
height: 30px;
background: orange;
}
.target {
/*
* We need a popover to use implicit anchors, and force showing it with CSS
* so that it's not in the top layer.
*/
display: block;
position: absolute;
margin: 0;
border: 0;
padding: 0;
width: anchor-size(width);
height: anchor-size(height);
background: lime;
}
</style>
<body onload="checkLayout('.target')">
<div class="spacer" style="height: 10px"></div>
<div class="relpos">
<div class="columns">
<div class="spacer" style="height: 10px"></div>
<div class="relpos">
<div class="spacer" style="height: 10px"></div>
<div class="relpos">
<div class="spacer" style="height: 10px"></div>
<div id="anchor1"></div>
</div>
<div class="target" popover anchor="anchor1"
data-expected-height=50></div>
</div>
</div>
</div>
</body>
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