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<!DOCTYPE html>
<title>Tests that anchors in a popover are discoverable</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#determining">
<link rel="author" title="Kiet Ho" href="mailto:kiet.ho@apple.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/test-common.js"></script>
<style>
body {
margin: 0;
}
#containing-block {
position: relative;
width: 100px;
height: 100px;
border: 1px black solid;
}
#anchor-1 {
width: 50px;
height: 50px;
position: absolute;
top: 25px;
left: 25px;
background: green;
anchor-name: --anchor-1;
}
#popover-1 {
margin: 0;
border: 1px black solid;
padding: 0;
width: 100px;
height: 100px;
position: absolute;
position-anchor: --anchor-1;
position-area: bottom right;
}
#anchor-2 {
width: 50px;
height: 50px;
position: absolute;
top: 25px;
left: 25px;
background: cyan;
anchor-name: --anchor-2;
}
#popover-2 {
margin: 0;
border: 1px black solid;
padding: 0;
width: 100px;
height: 100px;
position: absolute;
position-anchor: --anchor-2;
position-area: bottom right;
}
</style>
<body>
<div id="containing-block">
<div id="anchor-1"></div>
</div>
<!--
1px border of #containing-block
+ 25px gap between #containing-block and #anchor-1
+ 50px width of #anchor-1
= 76px
-->
<div class="target" id="popover-1" popover data-offset-x="76" data-offset-y="76">
<div id="anchor-2">
<!--
76px left offset of #anchor-1
+ 1px border of #popover-2
+ 25px gap between #popover-2 and #anchor-2
+ 50px width of #anchor-2
= 152px
-->
<!-- #popover-2 has to be here to trigger a bug in Safari -->
<div class="target" id="popover-2" popover data-offset-x="152" data-offset-y="152"></div>
</div>
</div>
<script>
const popover1 = document.getElementById("popover-1");
const popover2 = document.getElementById("popover-2");
popover1.showPopover();
popover2.showPopover();
checkLayoutForAnchorPos('.target');
</script>
</body>
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