css/css-break/widows-orphans-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Fragmentation level 3 Test: widows and block level boxes</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
<link rel="help" href="https://drafts.csswg.org/css-break/#widows-orphans">
<link rel="match" href="reference/widows-orphans-001-ref.html">
<meta name="assert" content="The widows property has no effect on block container boxes that contains only block-level boxes.">
<style>
div p { margin: 0; }

div {
  columns: 2;
  column-gap: 0;
  position: absolute; /* shrinkwrap. Using an explicit width in 'ch' with a monospace font would be fine as well if all UAs supported 'ch', but some don't. */
  column-fill: balance-all; /* to make sure it balances as well on paged media */

  widows: 4;
}

/* If the property applied to block container boxes that contain block-level boxes,
   it would force the two two-line paragraphs to stick together.*/

</style>
<body>
  <p>Test passes if there are 4 “X” characters <strong>arranged in a 2 by 2 square</strong> below.

  <div>
    <p>X<br>X
    <p>X<br>X
  </div>
</body>