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<!DOCTYPE html>
<title>Tests margin properties in position fallback</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#accepted-try-properties">
<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>
<script src="support/test-common.js"></script>
<style>
body {
margin: 0;
}
.cb {
width: 300px;
height: 150px;
position: relative;
background: lightgray;
}
.anchor {
position: absolute;
width: 100px;
height: 100px;
top: 25px;
background: orange;
anchor-name: --a;
}
.target {
position: absolute;
width: 100px;
height: 100px;
background: lime;
position-fallback: --fallbacks;
}
@position-fallback --fallbacks {
@try {
top: anchor(--a top);
right: anchor(--a left);
margin-top: 10px;
margin-right: 10px;
}
@try {
bottom: anchor(--a bottom);
left: anchor(--a right);
margin-bottom: 10px;
margin-left: 10px;
}
}
</style>
<body onload="checkLayoutForAnchorPos('.target')">
<div class=cb>
<div class=anchor style="left: 110px"></div>
<!-- Chooses 1st @try block. -->
<div class=target data-offset-x=0
data-expected-margin-left=0 data-expected-margin-right=10
data-expected-margin-top=10 data-expected-margin-bottom=0></div>
</div>
<div class=cb>
<div class=anchor style="right: 110px"></div>
<!-- Chooses 2nd @try block. -->
<div class=target data-offset-x=200
data-expected-margin-left=10 data-expected-margin-right=0
data-expected-margin-top=0 data-expected-margin-bottom=10></div>
</div>
</body>
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