import type { ViewerEventHandler, ViewerEventMap, ViewerEventName } from "../types";
export declare class EventEmitter {
    private handlers;
    on<T extends ViewerEventName>(eventName: T, handler: ViewerEventHandler<T>): () => void;
    emit<T extends ViewerEventName>(eventName: T, payload: ViewerEventMap[T]): void;
    clear(): void;
}
//# sourceMappingURL=event-emitter.d.ts.map