/**
 * MD3 state-layer ripple. Attach the returned ref to an element with
 * `position: relative` and `overflow: hidden`. On pointerdown a circular
 * ripple expands from the pointer; on pointerup/leave it fades out.
 */
export declare function useRipple<T extends HTMLElement = HTMLElement>(): {
    ref: import('react').RefObject<T | null>;
    onPointerDown: (e: React.PointerEvent<T>) => void;
};