css/css-grid/empty-grid-within-flexbox.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Sizing of an empty grid within a flexbox</title>
<link rel="author" title="Ethan Jimenez" href="mailto:ethavar@microsoft.com"/>
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1246609">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<meta name="assert" content="Checks that the intrisic sizes of an empty grid are correctly computed.">
<style>
  .flex {
    display: flex;
    width: 100px;
    height: 100px;
    background-color: red;
  }

  .flex-item {
    width: 50px;
    background-color: green;
  }

  .empty-grid {
    display: grid;
    grid-gap: 50px;
  }
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div class="flex">
  <div class="flex-item"></div>
  <div class="empty-grid"></div>
  <div class="flex-item"></div>
</div>