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

event emitters

import { EventEmitter } from './EventEmitter';
import { Listener } from './EventSource';
/**
 * This is the same as EventEmitterWithCurrent but the "current value" is optional
 */
export declare class EventEmitterWithOptionalCurrent<T> extends EventEmitter<T> {
    currentMessage: T | undefined;
    hasCurrentMessage: boolean;
    constructor(initialMessage?: T);
    emit(newMessage: T): void;
    subscribe(listener: Listener<T>): Listener<T>;
}