<!DOCTYPE html> <html class="reftest-wait"> <!-- Test: if textarea is not disabled and invalid, it is candidate for constraint validation and should be affected by :-moz-ui-invalid pseudo-class. --> <link rel='stylesheet' type='text/css' href='style.css'> <script> function doTest() { var e = document.getElementById('t'); e.setCustomValidity('foo'); e.removeAttribute('disabled'); document.documentElement.className=''; } document.addEventListener("MozReftestInvalidate", doTest, false); </script> <body> <textarea class='invalid' id='t' disabled></textarea> </body> </html>