testing/web-platform/tests/css/css-multicol/multicol-span-all-children-height-001.html


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<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Multi-column Layout Test: Test a multi-column container with percentage height children</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/#column-span">
  <link rel="match" href="multicol-span-all-children-height-001-ref.html">
  <meta name="assert" content="This test checks the the percentage height children under multicol container is rendered correctly.">

  <style>
  article {
    column-count: 2;
    width: 400px;
    height: 200px;
    outline: 1px solid black;
  }
  div {
    height: 50%; /* Spread evenly into two colums, each 25%. */
  }
  div.spanner {
    column-span: all;
    outline: 1px solid blue;
    height: 50%;
  }
  </style>

  <article>
    <div>block1</div>
    <div class="spanner">spanner</div>
    <div>block2</div>
  </article>
</html>