css - 为什么我没见到一个浏览器支持多重伪元素和嵌套伪元素？

Question

是确实现在还没有支持的吗？

::after::after{}
::after(2){}

Answer 1

Because to implement an element, you must first find the entity element it is based on

Answer 2

There should be no multiple afters. Multiple pseudo-elements refer to after and before
For details, you can read these two explanations:

1. W3School-CSS pseudo-element: W3School-CSS pseudo-element

2. Detailed explanation of css3 series: pseudo-elements and pseudo-class selectors: Detailed explanation of css3 series: pseudo-elements and pseudo-class selectors