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<!DOCTYPE html>
<meta charset="utf-8">
<title>Tests getComputedStyle() resolving anchor() in fragmentation context</title>
<link rel="help" href="https://drafts4.csswg.org/css-anchor-position-1">
<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="stylesheet" href="/fonts/ahem.css">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body {
margin: 0;
}
.rel {
position: relative;
background: lightgray;
}
.anchor {
anchor-name: --a;
background: orange;
}
.target {
position: absolute;
left: anchor(--a left);
right: anchor(--a right);
top: anchor(--a top);
bottom: anchor(--a bottom);
background: lime;
opacity: 0.5;
}
</style>
<!-- anchor is fragmented in second and third columns -->
<div class="multicol" id="test1">
<div class="rel">
<div class="spacer"></div>
<div class="anchor"></div>
<div class="target"></div>
</div>
</div>
<style>
#test1.multicol {
column-count: 3;
column-width: 100px;
column-gap: 10px;
width: 320px;
height: 100px;
}
#test1 .rel{
width: 100px;
height: 300px;
}
#test1 .spacer {
height: 175px;
}
#test1 .anchor {
margin-left: 25px;
width: 50px;
height: 50px;
}
</style>
<script>
test(() => {
const target = test1.querySelector('.target');
const style = getComputedStyle(target);
assert_equals(style.left, '25px');
assert_equals(style.right, '-85px');
assert_equals(style.top, '100px');
assert_equals(style.bottom, '100px');
}, 'getComputedStyle() with fragmented containing block in multicolumn layout');
</script>
<div id="test2" style="font: 20px/1 Ahem; width: 11em">
<div>
Lorem
<span class="rel">
ipsum <span class="anchor">dolor</span> sit
<span class="target"></span>
</span>
amet.
</div>
<div>
Lorem
<span class="rel">
ipsum dolor <span class="anchor">sit</span>
<span class="target"></span>
</span>
amet.
</div>
</div>
<script>
test(() => {
const targets = test2.querySelectorAll('.target');
const style1 = getComputedStyle(targets[0]);
assert_equals(style1.top, '20px');
assert_equals(style1.bottom, '0px');
assert_equals(style1.left, '-120px');
assert_equals(style1.right, '80px');
const style2 = getComputedStyle(targets[1]);
assert_equals(style2.top, '20px');
assert_equals(style2.bottom, '0px');
assert_equals(style2.left, '0px');
assert_equals(style2.right, '0px');
}, 'getComputedStyle() with fragmented containing block in inline layout');
</script>
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