import type { ConfigurableWindow } from "../_configurable";
export interface IntersectionObserverOptions extends ConfigurableWindow {
    /**
     * The Element or Document whose bounds are used as the bounding box when testing for intersection.
     */
    root?: HTMLElement | SVGElement | undefined | null;
    /**
     * A string which specifies a set of offsets to add to the root's bounding_box when calculating intersections.
     */
    root_margin?: string;
    /**
     * Either a single number or an array of numbers between 0.0 and 1.
     */
    threshold?: number | number[];
}
/**
 * Detects that a target element's visibility.
 *
 * @param target
 * @param callback
 * @param options
 */
export declare function intersection_observer(target: HTMLElement | SVGElement | undefined | null, callback: IntersectionObserverCallback, options?: IntersectionObserverOptions): {
    is_supported: import("svelte/store").Readable<boolean>;
    cleanup: () => void;
} | undefined;
export { intersection_observer as intersectionObserver };