$S.addHandler($S.getId(fav[i]),'mouseover',function(){
this.className += " "+'S_hover';
});
$S.addHandler($S.getId(fav[i]),'mouseout',function(){
var reg = new RegExp('(\\s|^)'+'S_hover'+'(\\s|$)');
this.className=this.className.replace(reg,' ');
});
原生JS 添加或者删除某个class
![](https://img2024.cnblogs.com/blog/35695/202408/35695-20240803130933255-1404888097.jpg)