servo/tests/wpt/web-platform-tests/css/css-contain/contain-layout-breaks-002.html

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HTML

<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>CSS-contain test: layout containment and forced breaks</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">
<meta name=flags content="">
<meta name=assert content="forced breaks within layout containment do not propagate to the parent.">
<link rel="match" href="reference/contain-layout-breaks-002-ref.html">
<link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-layout">
<link rel=help href="https://drafts.csswg.org/css-break-3/#forced-break">
<style>
article {
columns: 2 20px;
float: left;
height: 50px;
column-fill: auto;
}
div > div {
border-top: 20px solid orange;
break-before: column;
}
article > div {
border-top: 20px solid orange;
contain: layout;
}
</style>
<p>Test passes if there are two orange boxes below.
<article>
<div>
<div></div>
</div>
</article>