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[css] 77. ::bofore 和 :after 中双冒号和单冒号有什么区别？ #146

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qiilee opened this issue Sep 29, 2019 · 1 comment

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qiilee commented Sep 29, 2019

答案：

qiilee added the CSS label

zoyoy1203 commented Mar 21, 2020

::after表示法是在CSS 3中引入的，::符号是用来区分伪类和伪元素的。支持CSS3的浏览器同时也都支持CSS2中引入的表示法:after。

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