RUNOOB.COM
源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>电脑学习网教程(runoob.com)</title> <style> [title~=hello] { color:blue; } </style> </head> <body> <h2>将适用:</h2> <h1 title="hello world">Hello world</h1> <p title="student hello">Hello CSS students!</p> <hr> <h2>将不适用:</h2> <p title="student">Hi CSS students!</p> </body> </html>
运行结果