How to unsubscribe from a store in Redux?

Question

JavaScript

Greetings!

I'm learning Redux , I can't unsubscribe from the store. I unsubscribe from the store, then I make changes to the store in order to check whether I unsubscribed or not (did not unsubscribe).

Please explain how to unsubscribe from the store?

const store = createStore(reducer);

const INCREMENT = "INCREMENT";
const DECREMENT = "DECREMENT";
const RESET = "RESET";

const initialState = {count: 0};

function reducer(state = initialState, action) {
  switch(action.type) {
    case INCREMENT:
      return {count: state.count + 1};

    case DECREMENT:
      return {count: state.count - 1};

    case RESET:
      return {count: 0};

    default:
      return state;
  }
}

store.subscribe(() => console.log(store.getState()));
const unsubscribe = store.subscribe(() => console.log(store.getState()));
unsubscribe(); // отписались

// почему в консоль пишется инфа о изменение store, если ранее мы уже отписались?
store.dispatch({type: INCREMENT});
store.dispatch({type: INCREMENT});
store.dispatch({type: DECREMENT});
store.dispatch({type: RESET});

Answer 1

So you call subscrube twice, and call unsubscribe only for the second subscription.