Specify lowercase or uppercase for pseudo-element selectors.
指定伪元素的大小写。
a::before {}
/** ↑
* This is pseudo-element selector */
string: "lower"|"upper"
"lower"
The following patterns are considered warnings:
以下模式被认为是个警告:
a:Before {}
a:bEfOrE {}
a:BEFORE {}
a::Before {}
a::bEfOrE {}
a::BEFORE {}
input::-MOZ-PLACEHOLDER {}
The following patterns are not considered warnings:
以下模式正常:
a:before {}
a::before {}
input::-moz-placeholder {}
"upper"
The following patterns are considered warnings:
以下模式被认为是个警告:
a:Before {}
a:bEfOrE {}
a:BEFORE {}
a::Before {}
a::bEfOrE {}
a::before {}
input::-moz-placeholder {}
The following patterns are not considered warnings:
以下模式正常:
a:BEFORE {}
a::BEFORE {}
input::-MOZ-PLACEHOLDER {}