export interface ElementSize {
    width: number;
    height: number;
}
/**
 * Reactive size of an HTML element.
 *
 * @param target
 * @param callback
 * @param options
 */
export declare function element_size(target: HTMLElement | SVGElement | undefined | null, initial_size?: ElementSize, options?: ResizeObserverOptions): {
    width: import("svelte/store").Writable<number>;
    height: import("svelte/store").Writable<number>;
};
export { element_size as elementSize };