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<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>CSS-contain test: layout/paint containment on subgrid</title>
<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
<meta name=assert content="layout/paint containment inhibits subgrid">
<link rel="match" href="reference/contain-subgrid-001.html">
<link rel=help href="https://drafts.csswg.org/css-contain/#containment-layout">
<link rel=help href="https://drafts.csswg.org/css-contain/#containment-paint">
<link rel=help href="https://drafts.csswg.org/css-grid-2/">
<style>
.grid {
display: grid;
width: 40px;
height: 40px;
grid: [a] repeat(2,15px) [b] / [a] repeat(2,15px) [b];
gap: 10px;
}
.subgrid {
display: grid;
grid: subgrid;
background: lightgrey;
grid-area:1/1/3/3;
}
.layout { contain: layout; }
.paint { contain: paint; }
.inner {
background: blue;
grid-area:a/a/b/b;
}
.p {
place-self: start;
width:100%;
height:100%;
}
</style>
<div class="grid"><div class="subgrid layout"><div class="inner"></div></div></div>
<div class="grid"><div class="subgrid paint"><div class="inner"></div></div></div>
<div class="grid"><div class="subgrid layout"><div class="inner p"></div></div></div>
<div class="grid"><div class="subgrid paint"><div class="inner p"></div></div></div>
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