type CountdownOptions = {
    interval?: number;
    onDown?: (restTime: number, newTime: Date) => void;
    onEnd?: (newTime: Date) => void;
};
/**
 *
 * useCountdown
 * Easy way to countdown until a given endtime in intervals
 *
 * @param endTime Time to countdown
 * @param options  Countdown options
 * @see https://rooks.vercel.app/docs/hooks/useCountdown
 */
declare function useCountdown(endTime: Date, options?: CountdownOptions): number;
export { useCountdown };