A relative selector, e.g the a and > b in a > b {}
a
> b
a > b {}
In a > b, > b forms one relative selector, and > is the combinator. null for the first selector.
a > b
>
null
The b:is(...) in > b:is(...)
b:is(...)
> b:is(...)
A relative selector, e.g the
aand> bina > b {}