shallow: a common useSelector(..., equalityFn) implementation.
Semantics: shallow-compare Array / Object / Map / Set (uses Object.is for leaf values),
useful when a selector returns a "new object/array" with unchanged contents to skip meaningless re-renders.
shallow: a commonuseSelector(..., equalityFn)implementation.Semantics: shallow-compare Array / Object / Map / Set (uses
Object.isfor leaf values), useful when a selector returns a "new object/array" with unchanged contents to skip meaningless re-renders.