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<!DOCTYPE html> <html> <head> <style> a:after {content: " (" attr(href) ")";} </style> </head> <body> <h1>attr() 函数</h1> <p>在每个链接后的括号中插入 href 属性的值：</p> <p><a href="https://www.begtut.com">访问BEGTUT</a></p> <p><a href="https://www.begtut.com/html/">访问BEGTUT的HTML教程</a></p> </body> </html>