DEP0033:EventEmitter.listenerCount()
类型:仅文档
¥Type: Documentation-only
events.listenerCount(emitter, eventName) API 已弃用。请改用 emitter.listenerCount(eventName)。
¥The events.listenerCount(emitter, eventName) API is
deprecated. Please use emitter.listenerCount(eventName) instead.