Redux 的設計思想很簡單，就兩句話。 1. Web 應用是一個狀態機，視圖與狀態是一一對應的。 2. 所有的狀態，保存在一個對象里面。 redux工作流程圖  API文檔：http://www.redux.org.cn/ ## 一、簡單示例 效果：  index.js ~~~ import React from 'react' import ReactDOM from 'react-dom' import { createStore } from 'redux' import Counter from './components/Counter' import counter from './reducers' const store = createStore(counter) const rootEl = document.getElementById('root') const render = () => ReactDOM.render( <Counter value={store.getState()} onIncrement={() => store.dispatch({ type: 'INCREMENT' })} onDecrement={() => store.dispatch({ type: 'DECREMENT' })} />, rootEl ) render() store.subscribe(render) ~~~ reducers/index.js ~~~ export default (state = 0, action) => { switch (action.type) { case 'INCREMENT': return state + 1 case 'DECREMENT': return state - 1 default: return state } } ~~~ components/Counter.js ~~~ import React, { Component } from 'react' import PropTypes from 'prop-types' class Counter extends Component { constructor(props) { super(props); this.incrementAsync = this.incrementAsync.bind(this); this.incrementIfOdd = this.incrementIfOdd.bind(this); } incrementIfOdd() { if (this.props.value % 2 !== 0) { this.props.onIncrement() } } incrementAsync() { setTimeout(this.props.onIncrement, 1000) } render() { const { value, onIncrement, onDecrement } = this.props return ( <p> Clicked: {value} times {' '} <button onClick={onIncrement}> + </button> {' '} <button onClick={onDecrement}> - </button> {' '} <button onClick={this.incrementIfOdd}> Increment if odd </button> {' '} <button onClick={this.incrementAsync}> Increment async </button> </p> ) } } Counter.propTypes = { value: PropTypes.number.isRequired, onIncrement: PropTypes.func.isRequired, onDecrement: PropTypes.func.isRequired } export default Counter ~~~ 上面代碼簡化合并 ~~~ import React, { Component } from 'react' import ReactDOM from 'react-dom' import { createStore } from 'redux' import PropTypes from 'prop-types' class Counter extends Component { constructor(props) { super(props); this.incrementAsync = this.incrementAsync.bind(this); this.incrementIfOdd = this.incrementIfOdd.bind(this); this.propTypes = { value: PropTypes.number.isRequired, onIncrement: PropTypes.func.isRequired, onDecrement: PropTypes.func.isRequired }; } incrementIfOdd() { if (this.props.value % 2 !== 0) { this.props.onIncrement() } } incrementAsync() { setTimeout(this.props.onIncrement, 1000) } render() { const { value, onIncrement, onDecrement } = this.props return ( <p> Clicked: {value} times {' '} <button onClick={onIncrement}> + </button> {' '} <button onClick={onDecrement}> - </button> {' '} <button onClick={this.incrementIfOdd}> Increment if odd </button> {' '} <button onClick={this.incrementAsync}> Increment async </button> </p> ) } } const store = createStore((state = 0, action) => { switch (action.type) { case 'INCREMENT': return state + 1 case 'DECREMENT': return state - 1 default: return state } }); const render = () => ReactDOM.render( <Counter value={store.getState()} onIncrement={() => store.dispatch({ type: 'INCREMENT' })} onDecrement={() => store.dispatch({ type: 'DECREMENT' })} />, document.getElementById('root') ) render(); store.subscribe(render); ~~~ ## 二、redux、react-redux、react-router配合使用  入口文件 index.js ~~~ import React from 'react'; import ReactDOM from 'react-dom'; import {Router, browserHistory} from 'react-router'; import {Provider} from "react-redux"; import store from './redux'; import routes from './routes'; import registerServiceWorker from './registerServiceWorker'; ReactDOM.render(<Provider store={store}><Router history={browserHistory}>{routes}</Router></Provider>, document.getElementById('root')); registerServiceWorker(); // 用于生產環境cache數據 ~~~ 路由 routes/index.js ~~~ import App from '../App'; const routes = [ { path: '/', component: App } ]; export default routes; ~~~ redux/index.js ~~~ import { createStore } from 'redux'; function toDo(state={name: 'tom'}, action) { if(!state) state={name: 'tom'}; switch (action.type) { case 'CHANGE_NAME': return {...state, ...action.payload}; default: return state; } } let store = createStore(toDo); export default store; ~~~ 組件 App.js ~~~ import React, { Component } from 'react'; import {connect} from "react-redux"; class App extends Component { constructor(props){ super(props); } render() { return ( <div> {this.props.cName} <button type="button" onClick={this.changeName.bind(this)}>改變name</button> </div> ); } changeName() { this.props.changeName({name: 'jack'}); } } function mapStateToProps(state, props) { return { cName: state.name } } function mapDispatchToProps(dispatch, props) { return { changeName: (payload)=>dispatch({type: 'CHANGE_NAME', payload: payload}) } } export default connect(mapStateToProps, mapDispatchToProps)(App); ~~~ 參考鏈接：http://www.ruanyifeng.com/blog/2016/09/redux_tutorial_part_one_basic_usages.html