我現(xiàn)在正在學(xué)習(xí)redux。下面共享的代碼獨立于 React，因此不考慮 React 集成。下面是 redux-basics.js，它有Reducer、Store、Action 和 Subscription部分const redux = require('redux');const createStore =  redux.createStore;// Note : Store Creation is actually dependent on Reducer Thats why reducer must be created first.// Reducerconst initialState = {  counter : 0}const rootReducer = (state = initialState,action) => {     if(action.type === 'INCR_COUNTER'){         return  {  ...state,             counter : state.counter + 1 }     }     if(action.type === 'ADD_COUNTER'){        return  {  ...state,            counter : state.counter + action.value }    }    return state;}// Store const store = createStore(rootReducer);console.log(store.getState())// Subscriptionstore.subscribe(() => {    console.log(" SUbscription " , store.getState()  );})// Despatching an Action store.dispatch({type : "INCR_COUNTER"});store.dispatch({type: "ADD_COUNTER", value : 10});console.log(store.getState());然后我得到如下輸出（這是正確的?。篜s-MBP:redux--01-start pramod$ node redux-basics.js { counter: 0 } SUbscription  { counter: 1 } SUbscription  { counter: 11 }{ counter: 11 }但是，當(dāng)我將偵聽器移到調(diào)度方法下方時，訂閱將不起作用？我正在嘗試我缺少的東西，或者為什么會這樣？我正在做的代碼如下：（我以為它會打印訂閱方法輸出，但事實并非如此）// Despatching an Action store.dispatch({type : "INCR_COUNTER"});store.dispatch({type: "ADD_COUNTER", value : 10});// Subscriptionstore.subscribe(() => {    console.log(" SUbscription " , store.getState()  );})console.log(store.getState())進行上述代碼轉(zhuǎn)換后，代碼輸出如下：Pramod:redux--01-start pramod$ node redux-basics.js { counter: 0 }{ counter: 11 }任何提示/想法為什么會這樣？