源代码:
<!DOCTYPE html> <html> <head> <style> [lang|=en] { color:blue; } </style> </head> <body> <h2>Will apply to:</h2> <p lang="en">Hello!</p> <p lang="en-us">Hi!</p> <p lang="en-gb">Ello!</p> <hr> <h2>Will not apply to:</h2> <p lang="us">Hi!</p> <p lang="no">Hei!</p> </body> </html>
运行结果：