<!DOCTYPE html> <html> <head> <title>CSS 2.1 Test Suite: :first-letter</title> <link rel="author" title="Boris Zbarsky" href="mailto:bzbarsky@mit.edu" /> <link rel="author" title="Mozilla Corporation" href="http://mozilla.com/" /> <link rel="help" href="http://www.w3.org/TR/CSS21/selector.html#first-letter"/> <meta name="flags" content="dom" /> <style> div#x::first-letter { color: blue; float: none } </style> </head> <body> <div id="x">x</div> <script> document.body.offsetWidth; var div = document.getElementById("x"); div.id = "y"; div.firstChild.data = "Text"; </script> </body> </html>