簡単なonイベントバインディング
5987 ワード
簡単なonとoffの方法を実現します.
紹介: Eventオブジェクト: Eventオブジェクトにおけるon,off方法は、主にEvent.addEvent,Event.delegatehandleという2つの方法 を呼び出す. addEvent/offEvent: コード-Event.js
紹介:
funcList: {}, // delegate
ieFuncList :{} // ie Event.addEvent: addEventListener
Event.delegateHandle: , , ,
obj.addEventListener(type, fn, false);
obj.removeEventListener(type, fn, false);/**
* addEvent
* author [email protected]
*/
window.Event = {};
var Event = {
funcList: {}, // delegate
ieFuncList: {}, // ie
on: function(obj, selector, type, fn) {
if (!obj || !selector) return false;
var fnNew = Event.delegateHandle(obj, selector, fn);
Event.addEvent(obj, type, fnNew);
/* Event.funcList， */
if (!Event.funcList[selector]) {
Event.funcList[selector] = {};
}
if (!Event.funcList[selector][type]) {
Event.funcList[selector][type] = {};
}
Event.funcList[selector][type][fn] = fnNew;
},
off: function(obj, selector, type, fn) {
if (!obj || !selector || !Event.funcList[selector]) {
return false;
}
var fnNew = Event.funcList[selector][type][fn];
if (!fnNew) {
return;
}
Event.offEvent(obj, type, fnNew);
Event.funcList[selector][type][fn] = null;
},
delegateHandle: function(obj, selector, fn) {
/* delegate ， , */
var func = function(event) {
var event = event || window.event;
var target = event.srcElement || event.target;
var parent = target;
function contain(item, elmName) {
if (elmName.split('#')[1]) { //by id
if (item.id && item.id === elmName.split('#')[1]) {
return true;
}
}
if (elmName.split('.')[1]) { //by class
if (hasClass(item, elmName.split('.')[1])) {
return true;
}
}
if (item.tagName == elmName.toUpperCase()) {
return true; //by tagname
}
return false;
}
while (parent) {
/* ， (selector) 。 */
if (obj == parent) {
return false; //
}
if (contain(parent, selector)) {
fn.call(obj, event);
return;
}
parent = parent.parentNode;
}
};
return func;
},
addEvent: function(target, type, fn) {
if (!target) return false;
var add = function(obj) {
if (obj.addEventListener) {
obj.addEventListener(type, fn, false);
} else {
// for ie
if (!Event.ieFuncList[obj]) Event.ieFuncList[obj] = {};
if (!Event.ieFuncList[obj][type]) Event.ieFuncList[obj][type] = {};
Event.ieFuncList[obj][type][fn] = function() {
fn.apply(obj, arguments);
};
obj.attachEvent("on" + type, Event.ieFuncList[obj][type][fn]);
}
}
if (target.length >= 0 && target !== window && !target.tagName) {
for (var i = 0, l = target.length; i < l; i++) {
add(target[i])
}
} else {
add(target);
}
},
offEvent: function(target, type, fn) {
if (!target) return false;
var remove = function(obj) {
if (obj.addEventListener) {
obj.removeEventListener(type, fn, false);
} else {
//for ie
if (!Event.ieFuncList[obj] || !Event.ieFuncList[obj][type] || !Event.ieFuncList[obj][type][fn]) {
return;
}
obj.detachEvent("on" + type, Event.ieFuncList[obj][type][fn], false);
Event.ieFuncList[obj][type][fn] = {};
}
}
if (target.length >= 0 && target !== window && !target.tagName) {
for (var i = 0, l = target.length; i < l; i++) {
remove(target[i])
}
} else {
remove(target);
}
},
};
test
Event
(function(){
/* demo*/
var $id=function(id)
{
return document.getElementById(id) || id;
}
var outer = $id("content"),
btn = $id("text");
Event.on(outer,'button',"click",add);
Event.on(outer,'#unbind',"click",remove);
// ,
var newbtn = document.createElement("button");
var node = document.createTextNode("new button");
newbtn.appendChild(node);
outer.appendChild(newbtn);
function add(){
var e = arguments[0] || window.event;
var target = e.srcElement || e.target;
console.log("target:",target);
btn.innerHTML = target.innerHTML + ' ' + e.type;
}
function remove(){
Event.off(outer,'button',"click",add);
Event.off(outer,'#unbind',"click",remove);
}
})();