根据老师的代码改成了

class NameCard = (props) => {

const {name,number,isHuman,tags}=props

return(

<div className="alert alert-success">

<h4 className="alert-heading">{name}</h4>

<ul>

<li>电弧：{number}</li>

<li>{isHuman?'人类':'外星人'}</li>

</ul>

<p>

{tags.map((tag, index)=>(<span key={index}>

{tag}

</span>))}

</p>

</div>

)

}

但是保存之后还是编译失败

Failed to compile

./src/components/NameCard.js
  Line 3:  Parsing error: Unexpected token, expected "{"

  1 | import React from 'react'
  2 | 
> 3 | class NameCard = (props) => {
    |                ^
  4 | 		const {name,number,isHuman,tags}=props
  5 | 		return(
  6 | 			<div className="alert alert-success">

This error occurred during the build time and cannot be dismissed.