源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu教程(wfuyu.com)</title> <style> p > i:first-child { color:blue; } </style> </head> <body> <p>I am a <i>strong</i> man. I am a <i>strong</i> man.</p> <p>I am a <i>strong</i> man. I am a <i>strong</i> man.</p> <p><b>注意:</b> 当 :first-child 作用于 IE8以及更早版本的浏览器, DOCTYPE必须已经定义.</p> </body> </html>
运行结果：