import type { ConfigurableWindow } from '../_configurable';
import { type Readable, type Writable } from 'svelte/store';
export interface UseIntersectionObserverOptions extends ConfigurableWindow {
    /**
     * Start the IntersectionObserver immediately on creation
     *
     * @default true
     */
    immediate?: boolean;
    /**
     * The Element or Document whose bounds are used as the bounding box when testing for intersection.
     */
    root?: Element | (() => Element);
    /**
     * A string which specifies a set of offsets to add to the root's bounding_box when calculating intersections.
     */
    rootMargin?: string;
    /**
     * Either a single number or an array of numbers between 0.0 and 1.
     */
    threshold?: number | number[];
}
export interface UseIntersectionObserverReturn {
    isSupported: Readable<boolean>;
    isActive: Writable<boolean>;
    start: () => void;
    stop: () => void;
}
/**
 * Detects that a target element's visibility.
 *
 * @see https://vueuse.org/useIntersectionObserver
 * @param target
 * @param callback
 * @param options
 */
export declare function useIntersectionObserver2(target: Element | (() => Element), callback: IntersectionObserverCallback, options?: UseIntersectionObserverOptions): UseIntersectionObserverReturn;