input-fieldset-legend.html

Enable keyboard shortcuts

<!DOCTYPE html>

<html>

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

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

             affected by :invalid pseudo-class. -->

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

  <body>

    <fieldset disabled>

      <legend>

        <input class='invalid' required>

      </legend>

    </fieldset>

  </body>

</html>