> useCallback ... returns a function. It returns something with the same type you gave it. If you give it a function it gives you a function back. In typescri

> useCallback ... returns a function. It returns something with the same type you gave it. If you give it a function it gives you a function back. In typescript it's declared to take a function but in practice it doesn't check, and can be used to stabilize the identity of anything. useMemo otoh _does_ only take functions.