import { Ref, MaybeRef } from '../../../node_modules/vue';
/**
 * Detects whether a sticky element is currently stuck (fixed at its `top` offset)
 * or in its natural DOM position.
 *
 * A 1px invisible sentinel element is inserted immediately before the sticky element.
 * When that sentinel scrolls out of the IntersectionObserver's root viewport (adjusted
 * by `topOffset`), the element is considered stuck.
 *
 * `topOffset` must match the element's CSS `top` value in pixels. It is read once at
 * mount time. Pass a `Ref<number>` if the value is computed asynchronously (e.g. from
 * a CSS variable set by JavaScript after first render).
 */
export declare function useSticky(elementRef: Ref<HTMLElement | null>, topOffset?: MaybeRef<number>): {
    isStuck: Ref<boolean, boolean>;
};