<!DOCTYPE html> <html class="reftest-wait"> <!-- Test: Remove the required attribute to an input element to make it optional. --> <link rel='stylesheet' type='text/css' href='css-optional-style.css'> <script type="text/javascript"> function removeRequired() { document.getElementById('i').removeAttribute('required'); } function disableReftestWait() { document.documentElement.className = ''; } </script> <body onload="removeRequired(); disableReftestWait();"> <input id="i" required> </body> </html>