/**

* 事件

* 观察者模式

*/

var Observer = (function(slice) {

function bind(event, fn) {

var events = this.events = this.events || {},

parts = event.split(/\s+/),

i = 0,

num = parts.length,

part;

if (events[event] && events[event].length) return this;

for (; i < num; i++) {

events[(part = parts[i])] = events[part] || [];

events[part].push(fn);

}

return this;

}

function one(event, fn) {

this.bind(event, function fnc() {

fn.apply(this, slice.call(arguments));

this.unbind(event, fnc);

});

return this;

}

function unbind(event, fn) {

var events = this.events,

eventName, i, parts, num;

if (!events) return;

parts = event.split(/\s+/);

for (i = 0, num = parts.length; i < num; i++) {

if ((eventName = parts[i]) in events !== false) {

events[eventName].splice(events[eventName].indexOf(fn), 1);

if (!events[eventName].length) { //修正没有事件直接删除空数组

delete events[eventName];

}

}

}

return this;

}

function trigger(event) {

var events = this.events,

i, args, falg;

if (!events || event in events === false) return;

args = slice.call(arguments, 1);

for (i = events[event].length - 1; i >= 0; i--) {

falg = events[event][i].apply(this, args);

}

return falg; //修正带返回

}

return function() {

this.on =

this.subscribe = bind;

this.off =

this.unsubscribe = unbind;

this.trigger =

this.publish = trigger;

this.one = one;

return this;

};

})([].slice);

没有引用observer.js