button-fieldset-legend.html

Enable keyboard shortcuts

<!DOCTYPE html>

<html class="reftest-wait">

  <!-- Test: if button has a disabled fieldset ancestor, but is in the first

             legend, it is not barred from constraint validation and should be

             affected by :-moz-ui-invalid pseudo-class. -->

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

  <script>

    function onLoadHandler()

      var e = document.getElementById('b');

      e.setCustomValidity('foo');

      document.documentElement.className='';

  </script>

  <body onload="onLoadHandler();">

    <fieldset disabled>

      <legend>

        <button class='invalid' id='b'></button>

      </legend>

    </fieldset>

  </body>

</html>