<!DOCTYPE html> <html class="reftest-wait"> <head> <script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script> </head> <body> <iframe src="data:text/html,<body contenteditable spellcheck=false></body>"></iframe> <script> onload = function() { var i = document.querySelector("iframe"); var d = i.contentDocument; var w = i.contentWindow; var s = w.getSelection(); i.focus(); d.body.contentEditable = false; d.designMode = "off"; d.designMode = "on"; d.body.focus(); synthesizeKey("x", {}); s.collapse(d.body.firstChild, 1); synthesizeKey("x", {}); setTimeout(function() { document.documentElement.removeAttribute("class"); }, 0); }; </script> </body> </html>