[] transforms :not() W3C CSS level 4 pseudo classes to :not() CSS level 3 selectors following the [Selectors 4 Specification].

<example.css>

/* becomes */

<example.expect.css>

Caution

Only lists of simple selectors (:not(.a, .b)) will work as expected. Complex selectors (:not(.a > .b, .c ~ .d)) can not be downgraded.

[Selectors 4 Specification]: