interface CustomEvent<T> {
    addListener(listener: (v: T) => void): void;
    removeListener(listener: (v: T) => void): void;
}
interface CustomEventDispatchable<T> extends CustomEvent<T> {
    dispatch(arg: T): void;
}
export declare function useEventValue<T>(initialValue: T, event?: CustomEvent<T> | null): T;
export declare function useEventState<T>(initialValue: T, event?: CustomEventDispatchable<T> | null): [T, (value: T) => void];
export declare function classNames(...args: unknown[]): string;
export declare function useDebugMode(): boolean;
export {};
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