Question

考点

js语言和框架-JavaScript语言-事件冒泡和捕捉

面5笔5

绑定事件的兼容性写法。

Answer 1

解答

function addEvent(elem,event,fn) {
       if(elem.addEventListener){
           elem.addEventListener(event,fn,false);
       }else if (elem.attachEvent){
            elem.attachEvent('on'+event,fn);
       }else{
            elem[ 'on'+event]=fn;
       }
}