正在调度操作，即使它不在组件中

// Redux示例
import { createStore } from 'redux';

const initialState = { count: 0 };

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

const store = createStore(reducer);

store.subscribe(() => {
  console.log(store.getState());
});

store.dispatch({ type: 'INCREMENT' });

// React自定义Hooks示例
import { useState, useEffect } from 'react';

function useCounter() {
  const [count, setCount] = useState(0);

  useEffect(() => {
    const timer = setInterval(() => {
      setCount(c => c + 1);
    }, 1000);

    return () => clearInterval(timer);
  }, []);

  return count;
}

// Redux Thunk示例
const incrementAsync = () => dispatch => {
  setTimeout(() => {
    dispatch({ type: 'INCREMENT' });
  }, 1000);
};