Blitz - WPT: column-subgrid-extra-margin-008.html

wpt / css / css-grid / grid-lanes / subgrid / grid-subgridded-to-grid-lanes / track-sizing / column-subgrid-extra-margin-008.html

/css/css-grid/grid-lanes/subgrid/grid-subgridded-to-grid-lanes/track-sizing/column-subgrid-extra-margin-008.html

<!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="help" href="https://drafts.csswg.org/css-grid-3/#subgrids">
<link rel="match" href="column-subgrid-extra-margin-006-ref.html">
<style>
.wrapper {
  width: 116px;
  height: 100px;
  background: red;
}
.grid-lanes {
  display: inline-grid-lanes;
  grid-template-columns: repeat(4, auto);
  background: red;
}
.subgrid {
  display: grid;
  grid-template: auto / subgrid;
  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 width = 116px (4 columns of 29px each).

  Same layout and padding as -006, but inner1/inner2 use explicit
  positions (grid-column: 1 / span 2 and 3 / span 2) instead of the
  auto-placed `span 2` form. Per the WG resolution at
  https://github.com/w3c/csswg-drafts/issues/10926, when a subgrid
  is auto-placed in a grid-lanes container, all subgrids nested
  inside it are also treated as auto-placed for margin
  accommodation, regardless of any explicit position they specify.
  As a result the per-track sizing is identical to -006: every
  column grows to the dominant leaf's 29px contribution and the
  container ends up at 4 columns * 29px = 116px.

  See -006 for how the dominant leaf's 29px is computed.
-->
  <div class="grid-lanes">
    <div class="subgrid" style="grid-column: span 4; gap: 20px 10px">
      <div class="subgrid" style="grid-column: 1 / span 2;">
        <div class="subgrid"></div>
        <div class="subgrid"></div>
        <div class="subgrid"></div>
        <div class="subgrid"></div>
        <div class="subgrid"></div>
      </div>
      <div class="subgrid" style="grid-column: 3 / span 2;">
        <div class="subgrid"></div>
        <div class="subgrid"></div>
        <div class="subgrid"></div>
        <div class="subgrid"></div>
        <div class="subgrid"></div>
      </div>
    </div>
  </div>
</div>
</body>
</html>

/css/css-grid/grid-lanes/subgrid/grid-subgridded-to-grid-lanes/track-sizing/column-subgrid-extra-margin-006-ref.html

<!DOCTYPE HTML>
<html>
<meta charset="utf-8">
<p>Test passes if there is a filled green rectangle and <strong>no red</strong>.</p>
<div style="width: 116px; height: 100px; background: green;"></div>
</html>