text: import React, { Component } from 'react';
  
  
  class App extends Component {
    render() {
      return (
       
              <div className="box">
                   <div className="header">
                       首页
                   </div>
                   <div className="content">
                         首页中间
                   </div>
              </div>
            
      );
    }
  }
  
  export default App;