export type useTimeDurationReturn = {
    /** Formatted start date (hydration-safe) */
    started: string;
    /** Formatted end date (hydration-safe) */
    ended: string;
    /** Whether the time duration has finished */
    isFinished?: boolean;
    /** Formatted duration (hydration-safe) */
    duration: string;
    /** Whether client hydration has completed */
    hydrated: boolean;
};
type useTimeDurationArgs = {
    start?: Date;
    end?: Date;
    /** Intl options for started/ended formatting */
    dateFormat?: Intl.DateTimeFormatOptions;
    /** Placeholder shown before hydration or when date is missing */
    fallback?: string;
    /** Whether to update the duration in real time (every second) */
    liveUpdate?: boolean;
    /** Custom duration formatter if you don’t want the default "1t 2m 3s" */
    formatDuration?: (ms: number) => string;
};
export declare function useTimeDuration({ start, end, dateFormat, fallback, liveUpdate, formatDuration, }: useTimeDurationArgs): useTimeDurationReturn;
export {};