js事件兼容处理

var eventUtil = { ???bindEvent: function(el, type, target, callback, popgation) { ???????/** ????????* @author zhangtian ????????* @date 2017/11/16 ????????* @desc 标准浏览器与ie事件兼容处理 ????????* @augments el:事件源 type事件类型 callback回调函数 popgation是否冒泡 ????????* @todo ie8下调用stopPropagation 无效，知道原因的园工请留言告知或者发邮件给我，谢谢！！！ ????????*/ ???????var caption = caption || true; //默认为冒泡 ???????//如果不使用事件代理，target置空 ???????if((typeof target) == "function") { ???????????callback = target; ???????????target = null; ???????} ???????if(el.addEventListener) { ???????????el.addEventListener(type, function(e) { ???????????????if(target) { ???????????????????console.log("事件代理"); ???????????????????if(e.target == target) { ???????????????????????callback.call(target, e); //改变this指向，如果不用call，this指向window ???????????????????} ???????????????} else { ???????????????????console.log("普通事件"); ???????????????????callback.call(el, e); //改变this指向，如果不用call，this指向window ???????????????} ???????????}, popgation); ???????} else if(el.attachEvent) { ???????????el.attachEvent("on" + type, function() { ???????????????var e = window.event; ???????????????if(target) { ???????????????????console.log("事件代理"); ???????????????????if(e.target == target) { ???????????????????????callback.call(target, e); //改变this指向，如果不用call，this指向window ???????????????????} ???????????????} else { ???????????????????console.log("普通事件"); ???????????????????callback.call(el, e); //改变this指向，如果不用call，this指向window ???????????????} ???????????}); ???????} ???}, ???stopPropagation: function(e) { ???????var event = e || window.event; ???????if(event.stopPropagation) { ???????????event.stopPropagation(); ???????} else { ???????????event.cancelBubble; ???????} ???}, ???preventDefault: function(e) { ???????var event = e || window.event; ???????if(event.preventDefault) { ???????????event.preventDefault(); ???????} else { ???????????event.returnValue = false; ???????} ???}};