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CSS 参考手册
CSS visibility 属性
trycss_visibility
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<!DOCTYPE html> <html> <head> <style> h3 { visibility: hidden; } </style> </head> <body> <h1>The visibility Property</h1> <h2>This heading is visible</h2> <h3>This heading is hidden</h3> <p>Notice that the hidden heading still takes up space on the page.</p> </body> </html>