16. react - Fragment

1. Fragment : 可以理解为空标签。 类似与 微信小程序的

2. 实例：

import { Fragment } from 'react'

class LI extends React.Component {
  constructor (props) {
    super(props)
  }
  render () {
    console.log(this.props.lists)
    return(
      
        {
          this.props.lists.map(i => (
            
{ i }
          ))
        }
      
    )
  }
}

class UL extends React.Component {
  constructor(props) {
    super(props)
  }

  render () {
    const lists = [1,2,3,4]
    return(
      

        

      
    )
  }
}
ReactDOM.render(
  
,
  document.getElementById('root')
)

以上代码的渲染结果: