基本event封装：阻止冒泡、默认事件等
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<div id="box">
<input type="button" value="按钮3" id="btn3">
<a href="http://www.sogou.com/sie?hdq=AQxRG-7004&query=addEventListener%20of%20undefined&p=99350103&oq=&ri=-2" id="go">跳转</a>
</div>
<script type="text/javascript">
var btn3 = document.getElementById('btn3');
var box = document.getElementById('box');
var id = document.getElementById('id');
function showMes(event) {
event = event || window.event; //在IE8之前要用的是window.event;
var ele = event.target || event.srcElement; //在IE8之前用的不是target而是srcElement
alert(ele.nodeName);
event.stopPropagation();
}
function showM() {
alert("RGE");
}
function stopGo(event) {
event.stopPropagation();
event.preventDefault();
}
var eventUtil = {
//给元素添加事件
addHandler: function(element, type, handler) {
if(element.addEventListener) {
element.addEventListener(type,handler,false);
} else if(element.attachEvent) {
element.attachEvent('on'+type, handler);
} else {
element['on'+type] = handler;
}
},
//给元素删除事件
removeHandler: function(element, type, handler) {
if(element.removeEventListener) {
element.removeEventListener(type,handler,false);
} else if(element.detachEvent) {
element.detachEvent('on'+type, handler);
} else {
element['on'+type] = null;
}
},
//获得兼容浏览器的事件对象
getEvent: function(event) {
return event?event:window.event;
},
//获取事件类型
getType: function(event) {
return event.type;
},
//获取时间来自哪个元素
getElement: function(event) {
return event.target || event.srcElement;
},
//阻止取消事件的默认行为
preventDefault:function(event) {
if(event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
},
//阻止时间冒泡
stopPropagation: function(event) {
if(event.stopPropagation) {
event.stopPropagation();
} else {
event.cancelBubble = true;
}
}
}
eventUtil.addHandler(btn3, 'click', showMes);
eventUtil.addHandler(box, 'click', showM);
eventUtil.addHandler(go, 'click', stopGo);
</script>
</body>
</html>
把每一个事件封装在对象里面，把每一个功能封装在方法里面
