/**
 * Umbraco UI implementation of native DOM CustomEvent that propagates out of Shadow DOM context.
 */
export declare class UUIEvent<DetailType extends Record<string, any> = Record<string, any>, EventTargetType extends EventTarget | null = EventTarget | null> extends Event {
    readonly detail: DetailType;
    readonly target: EventTargetType;
    constructor(evName: string, eventInit?: any | null);
}