import type { Base, BaseConstructor, BaseProps } from '../Base/index.js';
import type { Features } from '../Base/features.js';
export type CreateAppOptions = Partial<Features> & {
    root?: HTMLElement;
};
/**
 * Instantiate and mount the given component on the given root element when the page has been loaded
 * and return a function to use the app instance when it is ready.
 * @link https://js-toolkit.studiometa.dev/api/helpers/createApp.html
*/
export declare function createApp<S extends BaseConstructor<Base>, T extends BaseProps = BaseProps>(App: S, options?: HTMLElement | CreateAppOptions): () => Promise<S & Base<T>>;