import type { Observable } from '../types';
/**
 * React hook that keeps a `ref` synchronised with the latest value from an
 * observable. The ref is updated via a layout-effect subscription so it is
 * always current during commit phase reads.
 *
 * If the observable is a `BehaviorSubject` (or any subject with a `.value`
 * property), the ref is initialised with that value.
 *
 * @template S - The value type.
 * @param subject - The observable to track.
 * @param initial - An optional initial value for the ref.
 * @returns A React ref whose `.current` mirrors the latest emitted value.
 *
 * @example
 * ```tsx
 * const countRef = useObservableRef(count$);
 * // countRef.current is always the latest emitted count
 * ```
 */
export declare const useObservableRef: <S>(subject: Observable<S>, initial?: S) => React.RefObject<S | undefined>;
export default useObservableRef;