Raw File
<!DOCTYPE html>
<!-- fieldset with one invalid element and a barred for constraint
validation element then you remove the second element -->
<html class='reftest-wait'>
  <head>
    <style>
      fieldset:invalid { display: none; }
    </style>
  </head>
  <script>
    function onloadHandler()
    {
      document.getElementById("fieldset").removeChild(document.getElementById('j'));
      document.documentElement.className = '';
    }
  </script>
  <body onload='onloadHandler();'>
    <fieldset id="fieldset">
      <input required>
      <input id='j' value='foo' readonly>
    </fieldset>
  </body>
</html>
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