output-invalid.html

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<!DOCTYPE html>

<html class="reftest-wait">

  <!-- Test: if output has a custom error, it should not be affected by :valid

             pseudo-class. -->

  <link rel='stylesheet' type='text/css' href='style.css'>

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

    <output class='invalid' id='b'>foo</output>

  </body>

</html>