1.首先引入路由
import {
BrowserRouter as Router
} from 'react-router-dom'
2.用BrowserHistory标签包含组件
<Provider store={store}>
<BrowserHistory>
<div>
<Route exact path="/" component={Counter}></Route>
<Route path="/magic" component={MagicNum}></Route>
</div>
</BrowserHistory>
</Provider>,
