/**
 * Represents an interval controller with manual control.
 * - `set` starts a new interval (clearing any existing one).
 * - `clear` stops the current interval.
 */
export interface Interval {
    /**
     * Starts a new interval with the given handler and delay (in ms).
     * Automatically clears any previously set interval.
     */
    set: (handler: VoidFunction, interval: number) => void;
    /**
     * Clears the currently active interval, if any.
     */
    clear: VoidFunction;
}
/**
 * React hook for managing an interval with manual control.
 * Automatically clears the interval on component unmount.
 */
export declare function useInterval(): Interval;