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CSS 参考手册
CSS counter() 函数
trycss_func_counter
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<!DOCTYPE html> <html> <head> <style> body { counter-reset: section; } h2::before { counter-increment: section; content: "Section " counter(section) ": "; } </style> </head> <body> <h1>Using CSS Counters:</h1> <h2>HTML Tutorial</h2> <h2>CSS Tutorial</h2> <h2>JavaScript Tutorial</h2> </body> </html>