content: import React from 'react';
  
  export default class Footer extends React.Component {
      // props 演示
  
      render() {
          let footer = ['2017','10','28'];
          
          return (
              
              <footer>
                  <hr/>
                  <h1>这里是页脚</h1>
                  <h2>从父组件传递过来的数据是： {this.props.info}</h2>
                  <span>{footer}</span>
              </footer>
          )
      }
  }