const eventUtils = {
// 绑定事件
addEvent(ele, type, handler){
if(ele.addEventListener{
ele.addEventListener(type, handler, false)
}else if(ele.attachEvent){
ele.attachEvent('on'+type, handler)
}else{
ele['on'+type] = handler
}
},
// 移除事件
removeEvent(ele, type, handler){
if(ele.removeEventListener){
ele.removeEventListener()
}else if(ele.detachEvent){
ele.detachEvent('on'+type, handler)
}else{
ele['on'+type] = null
}
},
// 获取事件类型
getEvent(event){
return event || window.event
},
// 获取目标对象
getTarget(event){
return event.target || event.srcElement
},
// 阻止事件冒泡
stopPropagation(event){
if(event.stopPropagation){
event.stopPropagation()
}else{
event.cancelBubble()
}
},
// 阻止事件默认行为
preventDefault(event){
if(event.preventDefault){
event.preventDefault()
}else{
event.retunValue = false
}
}
}