text: import React from 'react';
  import ReactDOM from 'react-dom';
  import {BrowserRouter} from 'react-router-dom';
  import {App} from './App.jsx';
  import './index.css';
  import 'normalize.css';
  
  //视图层
  ReactDOM.render(
  <BrowserRouter>
      <App/>
  </BrowserRouter>,document.getElementById('root'));
  