mathml/relations/css-styling/multi-column-layout.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>MathML inside multi-column</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#html-and-svg">
<meta name="assert" content="Verify that putting MathML inside a multi-column list shouldn't affect its layout.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script>
  setup({ explicit_done: true });
  window.addEventListener("DOMContentLoaded", function() {
      var epsilon = 1;
      var mfrac = document.getElementById("mfrac");
      var num = mfrac.firstElementChild.getBoundingClientRect();
      var denom = mfrac.lastElementChild.getBoundingClientRect();
      test(function() {
          assert_true(MathMLFeatureDetection.has_mspace());
          assert_approx_equals(num.width, 30, epsilon, "numerator width");
          assert_approx_equals(num.height, 40, epsilon, "numerator height");
          assert_approx_equals(denom.width, 50, epsilon, "numerator width");
          assert_approx_equals(denom.height, 60, epsilon, "numerator height");
      }, "mspace layout in multicol");
      test(function() {
          assert_true(MathMLFeatureDetection.has_mfrac());
          assert_greater_than_equal(denom.bottom - num.top,
                                    (40 + 60),
                                    "numerator is above the denominator");
          assert_approx_equals((num.left + num.right) / 2,
                               (denom.left + denom.right) / 2,
                               epsilon, "numerator and denominator are horizontally aligned");
      }, "mfrac layout in multicol");
      done();
  });
</script>
</head>
<body>
  <div id="log"></div>
  <div style="column-width: 10em; list-style-type: decimal;">
    <ol>
      <li>blah</li>
      <li>
        <math>
          <mfrac id="mfrac">
            <mspace width="30px" height="40px" style="background: cyan"></mspace>
            <mspace width="50px" height="60px" style="background: yellow"></mspace>
          </mfrac>
      </li>
      <li>blah</li>
      <li>blah</li>
      <li>blah</li>
    </ol>
  </div>
</body>
</html>