fieldset-invalid.html

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<!DOCTYPE html>

<html class="reftest-wait">

  <!-- Test: fieldset undergoes constraint validation.

             It should be affected by :invalid pseudo-class. -->

  <style>

    fieldset:invalid { display: none; }

  </style>

  <body onload="document.getElementById('f').setCustomValidity('foo'); document.documentElement.className='';">

    <fieldset>

      <input id='f'>

    </fieldset>

  </body>

</html>