1. //1.行内样式
    2. <hr style={{background: "#DDDDDD", height: "1px", border: "none"}}/>
    1. //2.classnames
    2.  npm i classnames
    4.  //js
    5. constructor(props){
    6.     super(props);
    7.     this.state={
    8.         showMember: false,
    9.     }
    10. }
    11.  import classNames from 'classnames'
    12. <div className={classNames({
    13.     'show': this.state.showMember
    14. })}></div>
    16. //css
    17. .show{
    18.     display:block;
    19. }