testing/web-platform/tests/css/css-multicol/multicol-span-all-dynamic-add-010-ref.html


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<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Multi-column Layout Test Reference: Append a block containing a spanner kid. The spanner kid should correctly span across all columns.</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">

  <style>
  #column {
    column-count: 3;
    column-rule: 6px solid;
    width: 400px;
    outline: 1px solid black;
  }
  h3 {
    column-span: all;
    outline: 1px solid blue;
  }
  </style>

  <body>
    <article id="column">
      <div>block1</div>
      <div><h3>spanner</h3>block2</div>
    </article>
  </body>
</html>