import type { Base, BaseConstructor } from '../Base/index.js';
/**
 * Import a component when it is visible.
 *
 * @template {BaseConstructor} T
 * @param {() => Promise<T|{default:T}>} fn
 *   The import function.
 * @param {string|HTMLElement|HTMLElement[]} nameOrSelectorOrElement
 *   The name or selector for the component.
 * @param {Base} [parent]
 *   The parent component.
 * @param {IntersectionObserverInit} [observerOptions]
 *   Options for the `IntersectionObserver` instance.
 * @return {Promise<T>}
 * @link https://js-toolkit.studiometa.dev/api/helpers/importWhenVisible.html
*/
export declare function importWhenVisible<T extends BaseConstructor = BaseConstructor>(fn: () => Promise<T | {
    default: T;
}>, nameOrSelectorOrElement: string | HTMLElement | HTMLElement[], parent?: Base, observerOptions?: IntersectionObserverInit): Promise<T>;