import type { Action } from 'svelte/action';
import type { Writable } from 'svelte/store';
export type PortalConfig = {
    /**
     * DOM element or CSS selector to be appended to.
     */
    target?: string | HTMLElement;
};
export type PortalReturn = {
    /**
     * Action on the element that need to be "portalled".
     */
    usePortal: Action<HTMLElement, PortalConfig>;
    /**
     * Controlled DOM element or CSS selector to be appended to.
     */
    target: Writable<string | HTMLElement | undefined>;
};