<!DOCTYPE html>
<html class="reftest-wait">
<head>
<script>
function boom()
{
document.getElementById("f").className = 'q';
document.documentElement.removeAttribute("class");
}
</script>
<style>
body {
width: 10em;
}
#f:after {
content: "TTT";
}
</style>
</head>
<body onload="setTimeout(boom, 0);">
<span id="f">foo foo foo foo foo foo foo foo foo foo<span style="display: block"></span></span>
</div>
</body>
</html>