import * as Solid from 'solid-js';
/**
 * Observe a Link's element while it preloads on `'viewport'`: `callback`
 * receives each intersection entry. Whenever the element or preload mode
 * changes, and on cleanup, a preloading Link gets `callback()` so it can
 * cancel a pending preload.
 */
export declare function useIntersectionObserver<T extends Element>(ref: Solid.Accessor<T | null>, callback: (entry?: IntersectionObserverEntry) => void, preload: Solid.Accessor<unknown>): void;