//1.行内样式
<hr style={{background: "#DDDDDD", height: "1px", border: "none"}}/>
//2.classnames
npm i classnames
//js
constructor(props){
super(props);
this.state={
showMember: false,
}
}
import classNames from 'classnames'
<div className={classNames({
'show': this.state.showMember
})}></div>
//css
.show{
display:block;
}