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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>CSS Grid Reference: Subgrid with margin/border/padding and 'overflow' property</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
<style>
.grid {
display: block;
border: 2px solid #f76707;
background-color: #fff4e6;
width: 150px;
height: 150px;
}
.subgrid {
/* Mock subgrid with grid. */
display: grid;
grid-auto-columns: 1fr;
grid-auto-rows: 1fr;
box-sizing: border-box;
width: 140px;
height: 140px;
background-color: #ffd8a8;
margin: 5px;
border: 7px solid #ffa94d;
padding: 11px;
}
.subitem {
grid-area: 1 / 1 / span 1 / span 1;
background-color: green;
width: 30px;
height: 30px;
border: 5px solid black;
}
.top { align-self: start; }
.bottom { align-self: end; }
.left { justify-self: start; }
.right { justify-self: end; }
</style>
<p>All the following grid containers should have the same rendering.</p>
<p>Test 1: Subgrid has overflow:visible</p>
<div class="grid">
<div class="subgrid">
<div class="subitem top left"></div>
<div class="subitem top right"></div>
<div class="subitem bottom left"></div>
<div class="subitem bottom right"></div>
</div>
</div>
<p>Test 2: Subgrid has overflow:auto</p>
<div class="grid">
<div class="subgrid" style="overflow: auto;">
<div class="subitem top left"></div>
<div class="subitem top right"></div>
<div class="subitem bottom left"></div>
<div class="subitem bottom right"></div>
</div>
</div>
<p>Test 3: Subgrid has overflow:hidden</p>
<div class="grid">
<div class="subgrid" style="overflow: hidden;">
<div class="subitem top left"></div>
<div class="subitem top right"></div>
<div class="subitem bottom left"></div>
<div class="subitem bottom right"></div>
</div>
</div>
</html>
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