function showMessage(){ ????alert(event.target.nodeName); ????//event.stopPropagation(); ????//event.preventDefault(); }function showMessage(event){????alert(event.target.nodeName);????//event.stopPropagation();????//event.preventDefault();}eventUtil.addHandler(btn3,'click',showMessage);1這兩個(gè)函數(shù)有什么區(qū)別么?2為什么能都能實(shí)現(xiàn)一樣的效果3而在調(diào)用的時(shí)候卻沒(méi)有傳參數(shù)
為什么函數(shù)不傳event參數(shù)也能實(shí)現(xiàn)事件對(duì)象的方法？
LioHD
2017-03-08 15:24:47
