1. The onclick event is executed first. If the onclick event returns a false value, the href will no longer be executed.
2. href="#" defaults to the anchor point #top, so the page will jump to the top when there is a scroll bar. The best solution is href="javascript:void(0);".
3. The returned content in href will flush out the information of the current page.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
