import React from 'react'

class Welcome extends React.Component{

    render(){

        const too = true

       return(

        <div>

             <h1>Hello React</h1>

             <p>sss</p>

                 {

                    too ? <p>你已经登陆</p> : <p>请登陆</p>

                 }

        </div>

        )

    }

}

export default Welcome