js事件监听/鼠标滚轮/行为/冒泡/键盘的兼容性写法
2024-10-18 16:48:28
addEvent:function(el,type,fn,capture) {
if (window.addEventListener) {
if (type === "mousewheel" && document.mozHidden !== undefined) {
type = "DOMMouseScroll";
}
el.addEventListener(type, fn, !!capture);
} else if (window.attachEvent) {
el.attachEvent("on" + type, fn);
}
},
removeEvent:function(el,type,fn,capture) {
if (window.removeEventListener) {
if (type === "mousewheel" && document.mozHidden !== undefined) {
type = "DOMMouseScroll";
}
el.removeEventListener(type, fn, !!capture);
} else if (window.detachEvent) {
el.detachEvent("on" + type, fn);
}
},
//对鼠标滚轮、行为、冒泡以及键盘做的兼容性处理
eventCompat:function(e) {
e || (e = root.event);
var type = e.type;
if (type == 'DOMMouseScroll' || type == 'mousewheel') {
e.delta = (e.wheelDelta) ? -e.wheelDelta / 120 : (e.detail || 0) / 3;
}
if (e.srcElement && !e.target) {
e.target = e.srcElement;
}
//阻止默认行为
if (!e.preventDefault) {
e.preventDefault = function() {
e.returnValue = false;
};
}
//阻止冒泡
if (!e.stopPropagation && e.cancelBubble !== undefined) {
e.stopPropagation = function() {
e.cancelBubble = true;
};
}
//键盘的兼容性处理
if(e.which == null){
e.which = e.charCode != null ? e.charCode : e.keyCode;
}
/*
......其他一些兼容性处理 */
return e;
},
bindAsEventListener:function(context, fun) {
var self = this;
return function(e) {
return fun.call(context, self.eventCompat(e));
}
}
//调用：
var dom = document.getElementById('btn');
var object = {
clickCtrl:function(e){
alert(e);
}
};
addEvent(dom, "click", function(){
alert(dom.id);
});
addEvent(dom, "mousedown",
bindAsEventListener(object, function(e){
object.ClickCtrl(e);
}));
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