大神就是牛
const createStore = (reducer) => {
let state;
let listeners = [];
const getState = () => state;
const dispatch = (action) => {
state = reducer(state, action);
listeners.forEach(listener => listener());
};
const subscribe = (listener) => {
listeners.push(listener);
return () => {
listeners = listeners.filter(l => l !== listener);
};
};
dispatch({});
return {getState, dispatch, subscribe};
};
学习如何在20行建立一个合理的近似Redux Store
