export declare function isEventTarget(value: any): value is EventTarget;
declare const _parent: unique symbol;
declare const _listeners: unique symbol;
declare const _delegates: unique symbol;
declare const _dispatchEventOnSelf: unique symbol;
interface EventListenerRecord {
    type: string;
    listener: EventListenerOrEventListenerObject;
    callback: EventListener;
    options: AddEventListenerOptions;
}
export declare class CustomEventTarget<TParent extends CustomEventTarget<TParent> = any> implements EventTarget {
    static dispatchEventOnSelf: typeof _dispatchEventOnSelf;
    [_parent]: TParent | null;
    [_listeners]: Array<EventListenerRecord>;
    [_delegates]: Set<EventTarget>;
    constructor(parent?: TParent | null);
    addEventListener(type: string, listener: EventListenerOrEventListenerObject | null, options?: boolean | AddEventListenerOptions): void;
    removeEventListener(type: string, listener: EventListenerOrEventListenerObject | null, options?: EventListenerOptions | boolean): void;
    dispatchEvent(ev: Event): boolean;
    [_dispatchEventOnSelf](_ev: Event): void;
}
export declare function addEventTargetDelegates<T extends CustomEventTarget>(target: T, delegates: Array<unknown>, include?: (target1: T) => boolean): void;
export declare function removeEventTargetDelegates<T extends CustomEventTarget>(target: T, delegates: Array<unknown>, include?: (target1: T) => boolean): void;
export declare function clearEventListeners(target: CustomEventTarget): void;
export {};