/** Return value of {@link useInterval}. */
export interface UseIntervalReturn {
    /** Whether the interval is currently running. */
    active: boolean;
    /** Start (or restart) the interval. */
    start: () => void;
    /** Stop the interval. */
    stop: () => void;
    /** Toggle the interval. */
    toggle: () => void;
}
/** Options for {@link useInterval}. */
export interface UseIntervalOptions {
    /** If `true`, start the interval immediately. Default: `true`. */
    autoInvoke?: boolean;
}
/**
 * Calls `callback` every `delay` milliseconds. The latest callback is always
 * invoked even if the callback identity changes between renders. Pass
 * `delay = null` to pause.
 *
 * @param callback - Function to invoke on each tick.
 * @param delay - Interval in milliseconds, or `null` to pause.
 * @param options - Configuration.
 * @returns Controls for starting/stopping the interval.
 */
export declare function useInterval(callback: () => void, delay: number | null, options?: UseIntervalOptions): UseIntervalReturn;