event-emitter:用于浏览器环境的EventEmitter

事件发射器 用于浏览器环境的EventEmitter。 例子 单机版 var listener = function ( ) { } ; // EventEmitter must be initialized with one or more event types var eventTypes = [ 'create' , 'update' , 'complete' ] ; // `Emitter` factory returns an EventEmitter instance var emitter = Emitter ( eventTypes ) ; emitter . addListener ( 'update' , listener ) . emit ( 'update' , { status : 'success' } ) . removeListener ( '