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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-grid/grid-lanes/subgrid/grid-subgridded-to-grid-lanes/track-sizing/row-subgrid-extra-margin-009.html - WPT Dashboard Interop Dashboard
<!DOCTYPE HTML>
<html>
<meta charset="utf-8">
<title>CSS Grid Lanes Test: Subgrid with no grid items accommodates gutter size and padding</title>
<link rel="author" title="Alison Maher" href="mailto:almaher@microsoft.com">
<link rel="match" href="row-subgrid-extra-margin-009-ref.html">
<style>
.wrapper {
width: 110px;
height: 83px;
background: red;
}
.grid-lanes {
display: inline-grid-lanes;
grid-template-rows: repeat(2, auto);
background: red;
}
.subgrid {
display: grid;
grid-template: subgrid / auto;
grid-template-columns: auto auto auto;
background: green;
padding: 11px 3px 9px 7px;
}
</style>
</head>
<body>
<p>Test passes if there is a filled green rectangle and <strong>no red</strong>.</p>
<div class="wrapper">
<!--
Grid lanes container height = 83px (2 rows of 41.5px each).
This test exercises padding-top and row-gap overrides at each
level of the chain:
outer: pad-T = 11, pad-B = 9, row-gap = 20
inner1, inner2: pad-T = 10, pad-B = 9, row-gap = 15
leaves: pad-T = 11, pad-B = 2, row-gap = 5
The dominant leaf accumulates contributions from every level of
the chain. On the start side: leaf's pad-T (11) + inner's pad-T
(10) + outer's pad-T (11) = 32. On the end side: leaf's pad-B (2)
+ half of inner's own row-gap (15/2 = 7.5) = 9.5. The leaf's
total margin contribution is 32 + 9.5 = 41.5.
Per the WG resolution at
container every subgrid in an auto-placed chain must accommodate
its margin contribution at every row it could land in. Both rows
therefore end up at 41.5px:
2 rows * 41.5px = 83px.
-->
<div class="grid-lanes">
<div class="subgrid" style="grid-row: span 2; gap: 20px 10px">
<div class="subgrid" style="grid-row: span 2; padding-top: 10px; row-gap: 15px;">
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
</div>
<div class="subgrid" style="grid-row: span 2; padding-top: 10px; row-gap: 15px;">
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
<div class="subgrid" style="padding-bottom: 2px; row-gap: 5px;"></div>
</div>
</div>
</div>
</div>
</body>
</html>