event-emitters/dist.es2018/QueueingEventEmitter.d.ts

event emitters

import { EventEmitter } from './EventEmitter';
import { Listener } from './EventSource';
/**
 * Acts the same as EventEmitter but queues messages when there are no subscribers, delivering them
 * as soon as the first subscriber subscribes.
 */
export declare class QueueingEventEmitter<T> extends EventEmitter<T> {
    private messageQueue;
    emit(newMessage: T): void;
    /**
     * The queue will still be drained if the subscriber throws error, in the case that the
     * there are multiple messages with multiple exceptions thrown, only the last one will
     * be re-thrown.
     */
    subscribe(listener: Listener<T>): Listener<T>;
}