<!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 { color: black; } div::first-letter { color: green; } </style> </head> <body> <div> <span> </span> </div> <script> document.body.offsetWidth; document.getElementsByTagName("span")[0].firstChild.data = "This is text"; </script> </body> </html>