<!DOCTYPE html>
<html>
<head>
<script>
function z()
{
var q = document.getElementById("q");
for (var r = 0; r < 100; ++r) {
// dump(r + "\n");
q.style.width = r + "px";
document.documentElement.offsetHeight;
}
}
</script>
</head>
<body onload="z();">
<div style="font-family: monospace;" id="q"><div id="w" style="word-spacing: 1px">AAA <span style="white-space: pre-line; font-weight: 500;">BB C
</span></div></div>
</body></html>