sousa-gecko/testing/web-platform/tests/html/semantics/permission-element/install/pseudo-elements.tentative.html

<!DOCTYPE html>
<meta charset=utf-8>
<link rel="match" href="pseudo-elements-ref.html">
<link rel="help" href="https://github.com/WICG/PEPC/blob/main/explainer.md#locking-the-pepc-style">
<body>
  <div>
    The install element should not create any pseudo elements.
  </div>

  <style>
    install::before, install::after { content: "FAIL"; }
  </style>

  <p>You should not see the word FAIL below.</p>

  <install></install>
</body>
</html>