export type EventKey = string | symbol;
export type Listener = (...args: any[]) => unknown;
type Listeners = Record<EventKey, Listener | Listener[] | undefined>;
/** Emitted before an error is delivered to `error` listeners, and even when there are none. */
export declare const errorMonitor: unique symbol;
/** Implemented by an emitter to handle promise rejections returned from its listeners. */
export declare const captureRejectionSymbol: unique symbol;
declare const kCapture: unique symbol;
export interface EventEmitterOptions {
    /** Route rejections from listeners returning promises to the emitter's `Symbol.for('nodejs.rejection')` handler. */
    captureRejections?: boolean;
}
/**
 * The subset of `node:events` that streams are built on, with Node's semantics:
 * an unhandled `error` event throws, listeners fire in insertion order against a
 * snapshot of the list, and `once()` wrappers expose their original via `.listener`.
 *
 * `setMaxListeners` is honored as state but never produces Node's
 * `MaxListenersExceededWarning`.
 */
export declare class EventEmitter {
    #private;
    static defaultMaxListeners: number;
    /** The default for the `captureRejections` option of newly created emitters. */
    static captureRejections: boolean;
    static readonly captureRejectionSymbol: typeof captureRejectionSymbol;
    static readonly errorMonitor: typeof errorMonitor;
    _events: Listeners;
    _eventsCount: number;
    _maxListeners?: number;
    protected [kCapture]: boolean;
    constructor(options?: EventEmitterOptions);
    setMaxListeners(n: number): this;
    getMaxListeners(): number;
    emit(type: EventKey, ...args: any[]): boolean;
    addListener(type: EventKey, listener: Listener): this;
    on(type: EventKey, listener: Listener): this;
    prependListener(type: EventKey, listener: Listener): this;
    once(type: EventKey, listener: Listener): this;
    prependOnceListener(type: EventKey, listener: Listener): this;
    removeListener(type: EventKey, listener: Listener): this;
    off(type: EventKey, listener: Listener): this;
    removeAllListeners(type?: EventKey): this;
    listeners(type: EventKey): Listener[];
    rawListeners(type: EventKey): Listener[];
    listenerCount(type: EventKey, listener?: Listener): number;
    eventNames(): EventKey[];
}
export {};