/// <reference types="react" />
/**
 * Triggers a callback after user holds mouse down for delay.
 *
 * Example:
 * const ref = useClickAndHold(() => console.log("Held!"), 1000);
 * return <button ref={ref}>Hold Me</button>;
 */
export declare function useClickAndHold(callback: () => void, delay?: number): import("react").RefObject<HTMLElement | null>;