fieldset-dynamic-valid.html

Enable keyboard shortcuts

<!DOCTYPE html>

<!--  fieldset with one valid element which is made valid dynamically -->

<html>

  <head>

    <style>

      fieldset:valid {display: none;}

    </style>

  </head>

  <script>

    function onloadHandler()

      document.getElementById('i').value = 'foo';

      document.documentElement.className = '';

  </script>

  <body onload="onloadHandler();">

    <fieldset id="fieldset">

      <input id='i' required>

    </fieldset>

  </body>

</html>