以前css无法做到实时显示网页屏幕的长度和宽度,但是css3通过@property 实现了,下面是完整的示例代码:
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" /> <title>BFW NEW PAGE</title> <style> @property --vh { syntax: '<length>'; inherits: true; initial-value: 100vh; } @property --vw { syntax: '<length>'; inherits: true; initial-value: 100vw; } :root { --w: tan(atan2(var(--vw),1px)); --h: tan(atan2(var(--vh),1px)); } body::before { content: counter(w) "x" counter(h); counter-reset: w var(--w) h var(--h); font-size: 150px; font-weight: 900; position: fixed; inset: 0; width: fit-content; height: fit-content; color: black; background-color: white; padding: 10px; margin: auto; } </style> </head> <body> </body> </html>
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