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<!doctype html>
<!--
Any copyright is dedicated to the Public Domain.
-->
<title>Examples of subgrid rules.</title>
<style>
.grid {
position: relative;
display: inline-grid;
grid-template-columns: 30px 50px 70px;
inline-size: 200px;
gap: 8px;
place-content: center;
border: 2px solid;
column-rule: auto solid;
column-rule-image: linear-gradient(#f008,#fc08);
column-rule-extent: all-long allow-overlap;
row-rule: 6px solid purple;
row-rule-extent: all-long;
}
.subgrid {
display: grid;
grid: subgrid / subgrid;
grid-column: 1 / span 2;
grid-row: 2 / span 2;
border: 1px dashed;
margin: 6px;
column-rule: 2px solid red;
row-rule: solid blue;
row-rule-align: rule;
row-rule-edge-align: gap-over;
}
.subgrid.larger {
gap: 16px;
row-rule-lateral-inset-start: 1px;
}
.subgrid.smaller {
gap: 4px;
row-rule-width: 100%;
}
x {
background: grey;
opacity: 0.5;
}
.grid::after {
position: absolute;
bottom: -3em;
font-size: 10px;
font-style: italic;
vertical-align: top;
content: attr(test);
}
</style>
<div class="grid" test="A subgrid with a larger gap than the parent.">
<x>1</x><x>2</x><x>3</x>
<div class="subgrid larger"><x>4</x><x>5</x><x>6</x></div>
<x>7</x><x>8</x>
</div>
<div class="grid" test="A subgrid with a smaller gap than the parent.">
<x>1</x><x>2</x><x>3</x>
<div class="subgrid smaller"><x>4</x><x>5</x><x>6</x></div>
<x>7</x><x>8</x>
</div>