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<!DOCTYPE html>
<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-pos">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-size">
<link rel="author" href="mailto:kojii@chromium.org">
<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>
.cb {
transform: translate(0); /* Make it a containing block. */
border-width: 5px 6px 7px 8px;
border-style: solid;
padding: 5px 6px 7px 8px;
}
.columns {
column-count: 4;
column-fill: auto;
column-gap: 10px;
column-width: 100px;
width: 320px;
height: 100px;
}
.spacer {
height: 10px;
background: pink;
}
.anchor1 {
anchor-name: --a1;
margin-left: 10px;
width: 50px;
height: 90px;
background: blue;
}
.target {
position: absolute;
}
.fixed {
position: fixed;
}
.target1 {
left: anchor(--a1 left);
top: anchor(--a1 top);
width: anchor-size(--a1 width);
height: anchor-size(--a1 height);
background: lime;
opacity: .3;
}
.target1-rb {
right: anchor(--a1 right);
bottom: anchor(--a1 bottom);
width: 10px;
height: 10px;
background: purple;
}
</style>
<body onload="checkLayoutForAnchorPos('.target')">
<p>The green box should be a union of blue boxes,
and the purple box should be at the right-bottom of the green box.
</p>
<div class="spacer" style="height: 10px"></div>
<div class="cb">
<div class="columns">
<div class="spacer" style="height: 30px"></div>
<div class="cb">
<!-- This spacer fills up to the middle of the 2nd column. -->
<div class="spacer" style="height: 130px"></div>
<div class="anchor1"></div>
<div class="spacer" style="height: 100px"></div>
<!-- The containing block of querying elements is block-fragmented. -->
<div class="target target1"
data-offset-x=18 data-offset-y=65
data-expected-width=160 data-expected-height=100></div>
<div class="target target1-rb"
data-offset-x=168 data-offset-y=155></div>
<div class="target fixed target1"
data-offset-x=26 data-offset-y=70
data-expected-width=160 data-expected-height=100></div>
<div class="target fixed target1-rb"
data-offset-x=176 data-offset-y=160></div>
</div>
<!-- The containing block of querying elements is a multi-column. -->
<div class="target target1"
data-offset-x=144 data-offset-y=5
data-expected-width=160 data-expected-height=100></div>
<div class="target target1-rb"
data-offset-x=294 data-offset-y=95></div>
<div class="target fixed target1"
data-offset-x=152 data-offset-y=10
data-expected-width=160 data-expected-height=100></div>
<div class="target fixed target1-rb"
data-offset-x=302 data-offset-y=100></div>
</div>
<!-- The containing block of querying elements is not fragmented. -->
<div class="target target1"
data-offset-x=144 data-offset-y=5
data-expected-width=160 data-expected-height=100></div>
<div class="target target1-rb"
data-offset-x=294 data-offset-y=95></div>
<div class="target fixed target1"
data-offset-x=152 data-offset-y=10
data-expected-width=160 data-expected-height=100></div>
<div class="target fixed target1-rb"
data-offset-x=302 data-offset-y=100></div>
</div>
</body>
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