1.安装插件

npm install react-router-dom --save-dev

2.新建路由

//routes.js
import React from 'react'
import {
    BrowserRouter as Router,
    Route,
} from 'react-router-dom'
import App from './App'
import App2 from './App2'
import App3 from './App3'

const Routers = () => (
    <Router>
        <div>
            <Route exact path="/" component={App}/>
            <Route path="/app" component={App}/>
            <Route path="/app2" component={App2}/>
            <Route path="/app3" component={App3}/>
        </div>
    </Router>
)
export default Routers

3.路由跳转

//顶部添加
import {Link} from 'react-router-dom' 
//跳转实现
<Link to="/app2">app2</Link>
<Link to="/app2">app3</Link>