export type NormalizeUrlOptions = {
    /**
     * File extensions that should be ignored for index pages.
     * @example ['.html', '.htm'] or ['.php', '.jsp']
     */
    ignorableExtensions?: readonly string[];
};
/**
 * Normalizes a URL for comparison purposes.
 *
 * This function:
 * - Normalizes URL encoding (decodes for parsing, then encodes for output)
 * - Normalizes path segments (handled by `parseUrl`)
 * - Normalizes trailing slashes
 * - Normalizes index page variations (e.g., `/index`, `/index.html` → `/`)
 * - Normalizes query parameter order (handled by `parseUrl`)
 * - Removes hash segments
 *
 * Note: Authentication information is preserved in the normalized URL.
 * It should be ignored during comparison using `withoutHashAndAuth`.
 * @param url - The URL to normalize
 * @param options - Optional configuration for extension matching
 * @returns A normalized URL string suitable for comparison
 */
export declare function normalizeUrl(url: string, options?: NormalizeUrlOptions): string;