useSelector

Callable

• useSelector<S, R>(source$: Observable<S>, initialValue: S, selector: (state: S) => R, comparator?: (v1: R, v2: R) => boolean): R

---

• Returns a value provided by source$.

  The hook returns the initial value and subscribes on the source$. After that, the hook returns values which are provided by the source.

  @example

  const value = useSelector<{data: Record<string, string>}>(
    source$,
    undefined,
    (state) => state.data,
    (data1, data2) => data1.key === data2.key
  );

  ---

  Type parameters

  • S
  • R

  Parameters

  • source$: Observable<S>

    an observable for values

  • initialValue: S

    th first value which is returned by the hook

  • selector: (state: S) => R

    a transform function for getting a derived value based on the source value

  • comparator: (v1: R, v2: R) => boolean = defaultEquals

    a comparator for previous and next values

  Returns R