import type { ExURL, ParseURLOptions } from './parse-url.js';
/**
 * Determines whether the target URL is at the same level or a deeper (lower) layer
 * in the path hierarchy relative to the base URL. Both URLs must share the same hostname.
 *
 * For example, if the base is `https://example.com/docs/`, then
 * `https://example.com/docs/getting-started` is considered a lower layer,
 * while `https://example.com/about` is not.
 * @param target - The target URL string or ExURL to check.
 * @param base - The base URL string or ExURL to compare against.
 * @param options - Optional URL parsing options.
 * @returns `true` if the target URL is at the same level or deeper than the base URL
 *          within the same hostname; `false` otherwise.
 */
export declare function isLowerLayer(target: string | ExURL, base: string | ExURL, options?: ParseURLOptions): boolean;