Specify a whitelist of allowed pseudo-element selectors.
a::before {}
/** ↑
* These pseudo-element selectors */This rule ignores CSS2 pseudo-elements i.e. those prefixed with a single colon.
This rule ignores selectors that use variable interpolation e.g. ::#{$variable} {}.
array|string|regex: ["array", "of", "unprefixed", "pseudo-elements" or "regex"]|"pseudo-element"|/regex/
Given:
["before", "/^my-/i"]The following patterns are considered violations:
a::after {}a::not-my-pseudo-element {}The following patterns are not considered violations:
a::before {}a::my-pseudo-element {}a::MY-OTHER-pseudo-element {}