wpt/css/css-display/display-math-on-pseudo-elements-001.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<meta charset="utf-8">
<title>display: math and inline-math on pseudo elements compute to flow</title>
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/css-display/#the-display-properties">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  .inline::before { content: 'math'; display: math; }
  .inline::after { content: 'math'; display: math; }
  .block::before { content: 'math'; display: block math; }
  .block::after { content: 'math'; display: block math; }
</style>
<div>
  <div class="block"></div>
  <math class="block"></math>
  <math><mrow class="block"></mrow></math>
  <div class="inline"></div>
  <math class="inline"></math>
  <math><mrow class="inline"></mrow></math>
</div>
<script>
  Array.from(document.querySelectorAll('[class]')).forEach(element => {
      test(function() {
          assert_equals(window.getComputedStyle(element, "::before").display,
                        element.getAttribute('class'));
          assert_equals(window.getComputedStyle(element, "::after").display,
                        element.getAttribute('class'));
      }, `computed display on ::before and ::after for <${element.localName} class="${element.className}">`);
  });
</script>