wpt/css/css-grid/subgrid/independent-formatting-context-fieldset.html at bf47c219d7454bdd6a9fa5542b8ed1b9627324d5 · web-platform-tests/wpt · GitHub

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<!DOCTYPE HTML>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html><head>
  <meta charset="utf-8">
  <title>Test: subgrid is allowed on fieldset and button</title>
  <link rel="author" title="Daniel Holbert" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1999886">
  <link rel="help" href="https://drafts.csswg.org/css-grid-2/#subgrid-listing">
  <link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#the-fieldset-and-legend-elements">
  <link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#button-layout-2">
  <link rel="match" href="independent-formatting-context-fieldset-ref.html">
  <!-- TODO(dholbert): This file should ultimately be merged into
       independent-formatting-context.html; see
       https://bugzilla.mozilla.org/show_bug.cgi?id=2000014 -->
  <style>

html,body {
  font:16px/1 monospace; padding:0; margin:0; line-height: 0;
}

fieldset, button {
  /* Reset the default margin/border/padding, so that we can use our
     simple regular-div mockup in reference case. (Note, it's important
     that this come before the .grid {...} rule, so that we don't reset its
     cosmetic margin-right/margin-bottom decls.) */
  margin: 0;
  border: 0;
  padding: 0;
  appearance: none;
}
.grid {
  position: relative;
  display: inline-grid;
  grid-template-rows: 0px 100px;
  width: 100px;
  margin-right: 20px;
  margin-bottom: 20px;
  vertical-align: top;
}

.subgrid {
  display: grid;
  grid-template-rows: subgrid;
  grid-row: 1 / 3;
  width: 100px;
  height: 100px;
  background-color: red;
}

.second {
  grid-row: 2;
  background-color: green;
}

  </style>
</head>
<body>

<!-- 'fieldset' and 'button' can both be styled as a grid/inline-grid, and
     that doesn't necessarily create an independent formatting context.
     So they are both eligible to be a subgrid.-->
<div class="grid">
  <fieldset class="subgrid">
    <div class="second"></div>
  </fieldset>
</div>

<div class="grid">
  <button class="subgrid">
    <div class="second"></div>
  </button>
</div>

</body>
</html>