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  • react,react-router,redux+react-redux 构建一个React Demo

    创建初始化应用

    加速我们的npm。

    npm install -g cnpm --registry=https://registry.npm.taobao.org

    利用create-react-app 创建项目,执行下面创建我们的demo-react应用:

    cd ......到你自己的路径
    create-react-app reactdemo

    我习惯使用VSCode,我用vscode打开这个文件夹,目录结构如下。

    安装需要的依赖

    我们的项目需要:

    react-router:

    react-router-dom

    redux

    react-redux

    在VSCode中打开powershell(Ctrl+`)

    依次安装

    cnpm install react-router --save
    cnpm install react-router-dom --save
    cnpm install redux --save
    cnpm install react-redux --save

    打开package.json可以看到我们使用的版本:

     

    不同的版本使用是有一些区别的,尤其路由使用上

    创建几个组件页面

    在src下创建几个文件夹存放我们使用的组件

    在各自文件夹下创建组件js

    Login.js

    import React,{ Component } from 'react';
    
    //=====组件=====
    class Login extends Component {
        
        render() {
            return (
                <div>
                    <h3>登录页面</h3>
                    <div>
                        用户名<input type="text" />
                    </div>
                    <div>
                        密码<input type="text" />
                    </div>
                    <div>
                        <button onClick={this.goLogin}>登录</button>
                    </div>
                </div>
            );
        }    
        goLogin(){
            alert("开始登录")
        }
        
        componentDidMount() {
              console.log("Login渲染完毕")
        }    
    }
    
    export default Login

    Home.js

    import React, { Component } from 'react';
    
    //=====组件=====
    class Home extends Component {    
        render() {
            return (
                <div>
                    <h3>主页</h3>
                </div>
            );
        }    
        componentDidMount() {
              console.log("Home渲染完毕")
        }
    }
    
    export default Home

    About.js

    import React,{ Component } from 'react';
    
    //=====组件=====
    class About extends Component {    
        render() {
            return (
                <div>
                    <h3>关于我们</h3>
                </div>
            );
        }
        
        componentDidMount() {
              console.log("About渲染完毕")
        }    
    }
    
    export default About

    News.js

    import React,{ Component } from 'react';
    //=====组件=====
    class News extends Component {    
        constructor(props) {
            super(props);
            // 设置 initial state
            this.state = {
                list: [
                    {id:1,title:"a",con:"caaaaaaaaaaaaaaaa"},
                    {id:2,title:"b",con:"cbbbbbbbbbbb"},
                    {id:3,title:"c",con:"cccccccccccccc"},
                    {id:4,title:"d",con:"cddddddddddddd"},
                    {id:5,title:"e",con:"ceeeeeeeeeeee"}
                ]
            };
        }
        
        render() {
            return (
                <div>
                    <h3>新闻页面</h3>
                    <ul>
                        {
                            this.state.list.map(function(item,i){
                                return <li key={item.id}>
                                    <a>{item.title}</a>
                                    <span>{item.con}</span>
                                </li>                        
                            })    
                        }
                    </ul>
                </div>
            );
        }
        
        componentDidMount() {
              console.log("News渲染完毕")
        }
        
    }
    
    
    export default News

    搭载路由

    我们把页面创建完毕,修改index.js配置路由:

    src/index.js:

     

     1 import React from 'react';
     2 import ReactDOM from 'react-dom';
     3 import {BrowserRouter as Router} from 'react-router-dom';
     4 import './index.css';
     5 import App from './App';
     6 import * as serviceWorker from './serviceWorker';
     7 
     8 ReactDOM.render(
     9     <Router>
    10         <App />
    11     </Router>    
    12 , document.getElementById('root'));
    13 
    14 // If you want your app to work offline and load faster, you can change
    15 // unregister() to register() below. Note this comes with some pitfalls.
    16 // Learn more about service workers: https://bit.ly/CRA-PWA
    17 serviceWorker.unregister();
    View Code

    App.js完成我们路由和页面的使用: 

    import React from 'react';
    import {Route,  Link} from 'react-router-dom';
    import './App.css';
    import Login from './components/login/Login.js';
    import Home from './components/home/Home.js';
    import About from './components/about/About.js';
    import News from './components/news/News.js';
    
    function App() {
      return (
        <div className="App">      
          <ul>
            <li>
              <Link to="/">登录</Link>
            </li>
            <li>
              <Link to="/Home">主页</Link>
            </li>
            <li>
              <Link to="/About">关于我们</Link>
            </li>
            <li>
              <Link to="/News">新闻页面</Link>
            </li>
          </ul>
          <div>
              <Route exact path="/" component={Login}/>
              <Route exact path="/Home" component={Home}/>
              <Route path="/About" component={About}/>
              <Route path="/News" component={News}/>
          </div>
        </div>
      );
    }
    
    export default App;

    我们预览页面,就可以看到大概了:

    npm run start

    使用redux

    src目录下创建redux文件:

    indexRedux.js(根状态树)我们存放登录状态,默认是未登录:

    //reducer
    //根状态树)我们存放登录状态,默认是未登录:
    var isLogin=false;
    
    function indexRedux(state = isLogin, action) {
        switch (action.type) {
            case "GO_LOGIN":
                //登录
                return true
            case "OUT_LOGIN":
                //退出登录
                return false
            default:
                  return state
        }
    }
    
    export default indexRedux

    rootRedux.js(合并所有状态,对外接口):

    import { combineReducers } from 'redux';
    
    //全局reducer
    import isLogin from './indexRedux.js'
    //子reducer
    
    
    //合并reducer
    var rootRedux = combineReducers({
        isLogin
    })
    
    export default rootRedux

    index.js使用redux:

    import React from 'react';
    import ReactDOM from 'react-dom';
    import {BrowserRouter as Router} from 'react-router-dom';
    import './index.css';
    import App from './App';
    import * as serviceWorker from './serviceWorker';
    
    //redux 
    import { createStore } from 'redux';
    //react-redux(关联react和redux)
    import { Provider } from 'react-redux';
    
    //reducers 状态树state和逻辑操作
    import rootRedux from './rootRedux.js'
    
    //创建状态树和设置
    
    //生成状态树对象
    const store = createStore(rootRedux);
    ReactDOM.render(
        <Provider store={store}>
            <Router>
                <App />
            </Router>    
        </Provider>
    , document.getElementById('root'));
    
    // If you want your app to work offline and load faster, you can change
    // unregister() to register() below. Note this comes with some pitfalls.
    // Learn more about service workers: https://bit.ly/CRA-PWA
    serviceWorker.unregister();
    View Code

    我们为news创建reducer,把list放入在reducer中,

     

    NewsRedux.js:

    //reducer
    
    var newsinit={
        list:[
            {id:1,title:"a",con:"caaaaaaaaaaaaaaaa"},
            {id:2,title:"b",con:"cbbbbbbbbbbb"},
            {id:3,title:"c",con:"cccccccccccccc"},
            {id:4,title:"d",con:"cddddddddddddd"},
            {id:5,title:"e",con:"ceeeeeeeeeeee"}
        ]
    };
    
    function NewsRedux(state = newsinit, action) {
        switch (action.type) {
            case "SORT_REVERSE":
                //倒叙显示
                var arr=state.list;
                var arr2=[];
                for(var i=arr.length-1;i>=0;i--){
                    arr2.push(arr[i])
                }
                return Object.assign({},state,{list:arr2})
            default:
                  return state
        }
    }
    
    
    export default NewsRedux

    News.js移除构造函数的json设置:

    import React,{ Component } from 'react';
    
    //=====组件=====
    class News extends Component {    
        constructor(props) {
            super(props);        
        }
        
        render() {
            return (
                <div>
                    <h3>消息</h3>
                    <ul>
                        {
                            this.state.list.map(function(item,i){
                                return <li key={item.id}>
                                    <a>{item.title}</a>
                                    <span>{item.con}</span>
                                </li>                        
                            })    
                        }
                    </ul>
                </div>
            );
        }
        
        componentDidMount() {
              console.log("News渲染完毕")
        }
        
    }
    
    
    export default News

    rootRedux.js引入news的reducer:

    import { combineReducers } from 'redux';
    
    //全局reducer
    import isLogin from './indexRedux.js'
    //子reducer
    import NewsRedux from './components/news/NewsRedux.js'
    
    //合并reducer
    var rootRedux = combineReducers({
        isLogin,
        NewsRedux,
    })
    
    export default rootRedux
    View Code

    利用react-redux链接react组件和redux

    我们先以news的处理作为操作,首先用react-redux封装News.js组件:

    创建src/news/NewsReactRedux.js:.

    import { connect } from 'react-redux';
    
    //=====引入组件=====
    import News from './News.js'
    
    
    //=====react-redux 封装组件=====
    
    // 哪些 Redux 全局的 state 是我们组件想要通过 props 获取的?
    //负责输入逻辑,即将state映射到 UI 组件的参数(props)
    function mapStateToProps(state) {
        return {
            list: state.NewsRedux.list
        };
    }
    
    // 哪些 action 创建函数是我们想要通过 props 获取的?
    //负责输出逻辑,即将用户对 UI 组件的操作映射成 Action。
    function mapDispatchToProps(dispatch) {
        return {
            SORTREVERSE:function(){
                dispatch({type:"SORT_REVERSE"})
            }
        };
    }
    
    //封装传递state和dispatch
    //把redux的状态数据和action全部发射给News组件
    var NewsReactRedux = connect(mapStateToProps,mapDispatchToProps)(News);
    
    export default NewsReactRedux

    我们把redux的状态数据和action全部发射给News组件,我们在里面使用即可:

     News.js

    import React,{ Component } from 'react';
    
    //=====组件=====
    class News extends Component {    
        constructor(props) {
            super(props);        
        }
        
        render() {
            return (
                <div>
                    <h3>消息</h3>
                    <ul>
                        {
                            this.props.list.map(function(item,i){
                                return <li key={item.id}>
                                    <a>{item.title}</a>
                                    <span>{item.con}</span>
                                </li>                        
                            })    
                        }
                    </ul>
                    <button onClick={this.SORTREVERSE.bind(this)}>倒叙显示</button>
                </div>
            );
        }
        SORTREVERSE(){
            this.props.SORTREVERSE();
        }
        componentDidMount() {
              console.log("News渲染完毕")
        }
        
    }
    
    
    export default News

    App.js使用封装后的组件News:

    import React from 'react';
    import {Route,  Link} from 'react-router-dom';
    import './App.css';
    import Login from './components/login/Login.js';
    import Home from './components/home/Home.js';
    import About from './components/about/About.js';
    import NewsReactRedux  from './components/news/NewsReactRedux.js';
    
    function App() {
      return (
        <div className="App">      
          <ul>
            <li>
              <Link to="/">登录</Link>
            </li>
            <li>
              <Link to="/Home">主页</Link>
            </li>
            <li>
              <Link to="/About">关于我们</Link>
            </li>
            <li>
              <Link to="/News">消息</Link>
            </li>
          </ul>
          <div>
              <Route exact path="/" component={Login}/>
              <Route exact path="/Home" component={Home}/>
              <Route path="/About" component={About}/>
              <Route path="/News" component={NewsReactRedux}/>
          </div>
        </div>
      );
    }
    
    export default App;
    View Code

     可以运行看看了。

    登录处理

    “/“地址就是我们的登录页面,我们点击登录跳转就可以了,不过我们会把用户的登录状态存放在indexRedux.js中,我们不把这个状态存如cookie类似的本地,所以 我们刷新页面退出即可,我们只是模拟的处理:

    如果存放在了cookie我们要如何处理,这时候在进入网站我们可以调用一个方法去获取cookie的登录状态,不管是什么我们都会执行action把redux的登录状态改为这个!

    因为Login.js要和redux结合,我们要修改登录状态,我们还要结合router去手动跳转到主页,

    LoginReactRedux.js:

    import { connect } from 'react-redux';
    
    //=====引入组件=====
    import Login from './Login.js'
    
    
    //=====react-redux 封装组件=====
    
    // 哪些 Redux 全局的 state 是我们组件想要通过 props 获取的?
    function mapStateToProps(state) {
        return {}
    }
    
    // 哪些 action 创建函数是我们想要通过 props 获取的?
    function mapDispatchToProps(dispatch) {
        return {
            GOLOGIN:function(username,password,history){
                console.log("用户名"+username)
                console.log("密码"+password)
                setTimeout(function(){
                    dispatch({type:"GO_LOGIN"})
                    history.push("/Home")
                },1000)
                
            }
        };
    }
    
    //封装传递state和dispatch
    var LoginReactRedux = connect(mapStateToProps,mapDispatchToProps)(Login);
    
    export default LoginReactRedux

    login.js

    import React, { Component } from 'react';
    
    //=====组件=====
    class Login extends Component {
        
        render() {
            return (
                <div>
                    <h3>登录页面</h3>
                    <div>
                        用户名<input type="text" ref="username" />
                    </div>
                    <div>
                        密码<input type="password" ref="password" />
                    </div>
                    <div>
                        <button onClick={this.goLogin.bind(this)}>登录</button>
                    </div>
                </div>
            );
        }    
        goLogin(){
            this.props.GOLOGIN(this.refs.username.value,this.refs.password.value,this.props.history);
        }
        
        componentDidMount() {
              console.log("Login渲染完毕")
        }    
    }
    
    export default Login

    App.js:

    import React from 'react';
    import {Route,  Link} from 'react-router-dom';
    import './App.css';
    import LoginReactRedux from './components/login/LoginReactRedux.js';
    import Home from './components/home/Home.js';
    import About from './components/about/About.js';
    import NewsReactRedux  from './components/news/NewsReactRedux.js';
    
    function App() {
      return (
        <div className="App">      
          <ul>
            <li>
              <Link to="/">登录</Link>
            </li>
            <li>
              <Link to="/Home">主页</Link>
            </li>
            <li>
              <Link to="/About">关于我们</Link>
            </li>
            <li>
              <Link to="/News">消息</Link>
            </li>
          </ul>
          <div>
              <Route exact path="/" component={LoginReactRedux}/>
              <Route exact path="/Home" component={Home}/>
              <Route path="/About" component={About}/>
              <Route path="/News" component={NewsReactRedux}/>
          </div>
        </div>
      );
    }
    
    export default App;

    退出登录处理

    我们在/Home加一个按钮就是退出按钮他和我们的登录处理相反:

    HomeReactRedux.js:

    import { connect } from 'react-redux';
    
    //=====引入组件=====
    import Home from './Home.js'
    
    
    //=====react-redux 封装组件=====
    
    // 哪些 Redux 全局的 state 是我们组件想要通过 props 获取的?
    function mapStateToProps(state) {
        return {}
    }
    
    // 哪些 action 创建函数是我们想要通过 props 获取的?
    function mapDispatchToProps(dispatch) {
        return {
            OUTLOGIN:function(history){
                dispatch({type:"OUT_LOGIN"})
                history.push("/")
                
            }
        };
    }
    
    //封装传递state和dispatch
    var HomeReactRedux = connect(mapStateToProps,mapDispatchToProps)(Home);
    
    export default HomeReactRedux

    Home.js:

    import React, { Component } from 'react';
    
    //=====组件=====
    
    class Home extends Component {
        
        render() {
            return (
                <div>
                    <h3>主页</h3>
                    <div>
                        <button onClick={this.outLogin.bind(this)}>退出登录</button>
                    </div>
                </div>
            );
        }
    
        outLogin(){
            this.props.OUTLOGIN(this.props.history);
        }
            
        componentDidMount() {
              console.log("Home渲染完毕")
        }    
    }
    
    export default Home

    记得修改app.js

    import React from 'react';
    import {Route,  Link} from 'react-router-dom';
    import './App.css';
    import LoginReactRedux from './components/login/LoginReactRedux.js';
    import HomeReactRedux from './components/home/HomeReactRedux.js';
    import About from './components/about/About.js';
    import NewsReactRedux  from './components/news/NewsReactRedux.js';
    
    function App() {
      return (
        <div className="App">      
          <ul>
            <li>
              <Link to="/">登录</Link>
            </li>
            <li>
              <Link to="/Home">主页</Link>
            </li>
            <li>
              <Link to="/About">关于我们</Link>
            </li>
            <li>
              <Link to="/News">消息</Link>
            </li>
          </ul>      <div>
              <Route exact path="/" component={LoginReactRedux}/>
              <Route exact path="/Home" component={HomeReactRedux}/>
              <Route path="/About" component={About}/>
              <Route path="/News" component={NewsReactRedux}/>
          </div>
        </div>
      );
    }
    
    export default App;

    权限处理

    显示级别

    我们的网站在/地址是处在登录页面,这时候我们应该只有登录框,在进入主页之后会看到跳转链接,我们要获取我们的登录状态,还控制一些标签的显示:

    我们在App.js存放了我们的导航,我们只需要对这个组件利用react-redux做一次封装,拿到状态,利用style去处理即可:

    我们把导航提出到组件,并且react-redux做封装,在App.js使用

    Navigation.js:

    import React, { Component } from 'react';
    import {Route,Link} from 'react-router-dom';
    
    class Nav extends Component {
      render() {
        return (
            <ul style={{display:this.props.isLogin?"block":"none"}}>
                <li style={{display:this.props.isLogin?"none":"block"}}>
                    <Link to="/">登录</Link>
                </li>
                <li>
                    <Link to="/Home">主页</Link>
                </li>
                <li>
                    <Link to="/About">关于我们</Link>
                </li>
                <li>
                    <Link to="/News">消息</Link>
                </li>
            </ul>
        );
      }
    }
    
    export default Nav;

    NavigationReactRedux.js

    import { connect } from 'react-redux';
    
    //=====引入组件=====
    import Navigation from './Navigation.js'
    
    //=====react-redux 封装组件=====
    
    // 哪些 Redux 全局的 state 是我们组件想要通过 props 获取的?
    function mapStateToProps(state) {
        return {
            isLogin:state.isLogin
        }
    }
    
    // 哪些 action 创建函数是我们想要通过 props 获取的?
    function mapDispatchToProps(dispatch) {
        return {};
    }
    
    //封装传递state和dispatch
    var NavigationReactRedux = connect(mapStateToProps,mapDispatchToProps)(Navigation);
    
    export default NavigationReactRedux

    App.js我们使用封装后导航:

    import React from 'react';
    import {Route,  Link} from 'react-router-dom';
    import './App.css';
    import LoginReactRedux from './components/login/LoginReactRedux.js';
    import HomeReactRedux from './components/home/HomeReactRedux.js';
    import About from './components/about/About.js';
    import NewsReactRedux  from './components/news/NewsReactRedux.js';
    import NavigationReactRedux from './components/navigation/NavigationReactRedux.js';
    
    function App() {
      return (
        <div className="App">      
          <NavigationReactRedux />
          <div>
              <Route exact path="/" component={LoginReactRedux}/>
              <Route exact path="/Home" component={HomeReactRedux}/>
              <Route path="/About" component={About}/>
              <Route path="/News" component={NewsReactRedux}/>
          </div>
        </div>
      );
    }
    
    export default App;

    测试一下

    逻辑级别

    如果用户直接输入地址怎么办?所以我们在路由对应的页面都要加入登录状态的判断,然后处理是留在当前页面还是跳到登录页面:

    我们登录后的页面只有三个,我们先对Home做一个处理,其他的类似:

    HomeReactRedux.js:

    import { connect } from 'react-redux';
    
    //=====引入组件=====
    import Home from './Home.js'
    
    
    //=====react-redux 封装组件=====
    
    // 哪些 Redux 全局的 state 是我们组件想要通过 props 获取的?
    function mapStateToProps(state) {
        return {
            isLogin:state.isLogin
        }
    }
    
    // 哪些 action 创建函数是我们想要通过 props 获取的?
    function mapDispatchToProps(dispatch) {
        return {
            OUTLOGIN:function(history){
                dispatch({type:"OUT_LOGIN"})
                history.push("/")
            }
        };
    }
    
    //封装传递state和dispatch
    var HomeReactRedux = connect(mapStateToProps,mapDispatchToProps)(Home);
    
    export default HomeReactRedux

    Home.js

    import React, { Component } from 'react';
    import {Redirect} from 'react-router-dom';
    //=====组件=====
    
    class Home extends Component {
        
        render() {
            
            if(this.props.isLogin==false){
                return <Redirect to="/" />
            }
            return (
                <div>
                    <h3>主页</h3>
                    <div>
                        <button onClick={this.outLogin.bind(this)}>退出登录</button>
                    </div>
                </div>
            );
        }
    
        outLogin(){
            this.props.OUTLOGIN(this.props.history);
        }
            
        componentDidMount() {
              console.log("Home渲染完毕")
        }    
    }
    
    export default Home
    View Code

    其他路由页面同理!!!其实也就是News页面,目前我们其它的页面并不需要验证

    NewsReactRedux.js

    import { connect } from 'react-redux';
    
    //=====引入组件=====
    import News from './News.js'
    
    
    //=====react-redux 封装组件=====
    
    // 哪些 Redux 全局的 state 是我们组件想要通过 props 获取的?
    //负责输入逻辑,即将state映射到 UI 组件的参数(props)
    function mapStateToProps(state) {
        return {
            isLogin:state.isLogin,
            list: state.NewsRedux.list
        };
    }
    
    // 哪些 action 创建函数是我们想要通过 props 获取的?
    //负责输出逻辑,即将用户对 UI 组件的操作映射成 Action。
    function mapDispatchToProps(dispatch) {
        return {
            SORTREVERSE:function(){
                dispatch({type:"SORT_REVERSE"})
            }
        };
    }
    
    //封装传递state和dispatch
    //把redux的状态数据和action全部发射给News组件
    var NewsReactRedux = connect(mapStateToProps,mapDispatchToProps)(News);
    
    export default NewsReactRedux
    View Code

    News.js

    import React,{ Component } from 'react';
    import {Redirect} from 'react-router-dom';
    
    //=====组件=====
    class News extends Component {    
        constructor(props) {
            super(props);        
        }
        
        render() {
            if(this.props.isLogin==false){
                return <Redirect to="/" />
            }
            return (
                <div>
                    <h3>消息</h3>
                    <ul>
                        {
                            this.props.list.map(function(item,i){
                                return <li key={item.id}>
                                    <a>{item.title}</a>
                                    <span>{item.con}</span>
                                </li>                        
                            })    
                        }
                    </ul>
                    <button onClick={this.SORTREVERSE.bind(this)}>倒叙显示</button>
                </div>
            );
        }
        SORTREVERSE(){
            this.props.SORTREVERSE();
        }
        componentDidMount() {
              console.log("News渲染完毕")
        }
        
    }
    
    
    export default News
    View Code

    刷新问题

    我们本地存储可以使用cookie还可以使用localstorage,我们刷新应用就获取localstorage对登录状态的设置,然后action即可!

    不过不管是cookie还是localstorage如果用户浏览器的安全级别高就完蛋了,我们存放在这个2个里面哪一个都会遇到这个问题。

    我们或许可以这样做,在刷新我们就向后台发送一个请求,这个请求会返回用户是否在登录中和返回用户的一些信息,根据状态我们用手动方法跳转链接。

    404错误

    先创建一个src/components/exception/NotFind.js文件app.js

    import React, { Component } from 'react';
    //=====组件=====
    
    class NotFind extends Component {
        
        render() {
            
            return (
                <div>
                    <h1>404错误</h1>
                    <div>
                        找不到对应的网页
                    </div>
                </div>
            );
        }
    }
    
    export default NotFind

    使用router为我们提供的 Switch 组件:

    import React from 'react';
    import {Route,  Link,Switch} from 'react-router-dom';
    import './App.css';
    import LoginReactRedux from './components/login/LoginReactRedux.js';
    import HomeReactRedux from './components/home/HomeReactRedux.js';
    import About from './components/about/About.js';
    import NewsReactRedux  from './components/news/NewsReactRedux.js';
    import NavigationReactRedux from './components/navigation/NavigationReactRedux.js';
    import NotFind from './components/exception/NotFind.js';
    
    function App() {
      return (
        <div className="App">      
          <NavigationReactRedux />
          <div>
            <Switch>
              <Route exact path="/" component={LoginReactRedux}/>
              <Route exact path="/Home" component={HomeReactRedux}/>
              <Route path="/About" component={About}/>
              <Route path="/News" component={NewsReactRedux}/>
              <Route component={NotFind}/>            
                    </Switch> 
          </div>
        </div>
      );
    }
    
    export default App;

    打包

    我们执行下面命令:

    npm run build

    HashRouter方式

    在使用BrowserRouter发布的时候会遇到刷新404错误问题。我们需要做一些设置。所以为了省事干脆用HashRouter

    index.js: 

    import React from 'react';
    import ReactDOM from 'react-dom';
    // import {BrowserRouter as Router} from 'react-router-dom';
    import {HashRouter as Router} from 'react-router-dom';
    import './index.css';
    import App from './App';
    import * as serviceWorker from './serviceWorker';
    
    //redux 
    import { createStore } from 'redux';
    //react-redux(关联react和redux)
    import { Provider } from 'react-redux';
    
    //reducers 状态树state和逻辑操作
    import rootRedux from './rootRedux.js'
    
    //创建状态树和设置
    
    //生成状态树对象
    const store = createStore(rootRedux);
    ReactDOM.render(
        <Provider store={store}>
            <Router>
                <App />
            </Router>    
        </Provider>
    , document.getElementById('root'));
    
    // If you want your app to work offline and load faster, you can change
    // unregister() to register() below. Note this comes with some pitfalls.
    // Learn more about service workers: https://bit.ly/CRA-PWA
    serviceWorker.unregister();

    代码下载

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  • 原文地址:https://www.cnblogs.com/tianyamoon/p/11242708.html
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