css/css-multicol/multicol-margin-003.html

<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Multi-column Layout Test: multi-column and margin bottom of last child</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#the-multi-column-model">
  <link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
  <meta name="assert" content="This test checks the margin-bottom of the last child of a multi-column should not affect its parent's margin-bottom.">

  <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
  <style>
  article {
    font: 25px/25px Ahem;
    color: green;
    background-color: green;
    width: 100px;
    column-count: 2;
    column-gap: 0;
    margin-bottom: 0;
    orphans: 1;
    widows: 1;
  }

  article div:last-child {
    margin-bottom: 13px;
  }
  </style>

  <body>
    <p>Test passes if there is a filled green square.</p>
    <article>
      <div>a1 a2 a3 a4</div>
      <div>a5</div>
    </article>
    <article>b1 b2</article>

    <!--
    Expected result:

    |------+------|
    |  a1  |  a4  |
    |  a2  |  a5  |
    |  a3  |margin|
    |------+------|
    |  b1  |  b2  |
    |------+------|
    -->
  </body>
</html>