<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>Hyphenation test</title></head>
<!-- style changes don't break hyphenation -->
<body xml:lang="en-us">
<div style="width: 0; hyphens: auto;">
h<span style="color:red">yphena</span>tion
</div>
</body>
</html>