A tiny event emitter

events.js

!function(){var a=function(){};a.prototype={on:function(a,b){return this.events||(this.events={}),this.events[a]||(this.events[a]=[]),this.events[a].push(b),this},off:function(a,b){return(this.events||{})[a]&&(b?this.events[a].splice(this.events[a].indexOf(b),1):this.events[a]=[]),this},emit:function(a){if((this.events||{})[a])for(var b=0;b<this.events[a].length;b++)(this.events[a][b]||function(){}).apply(this,Array.prototype.slice.call(arguments,1));return this}},"function"==typeof define&&define.amd?define(a):"object"==typeof exports?module.exports=a:window.Emitter=a}();