/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
/**
 * Removes the trailing slash from a URL if it exists.
 *
 * @param url - The URL string from which to remove the trailing slash.
 * @returns The URL string without a trailing slash.
 *
 * @example
 * ```js
 * stripTrailingSlash('path/'); // 'path'
 * stripTrailingSlash('/path');  // '/path'
 * stripTrailingSlash('/'); // '/'
 * stripTrailingSlash(''); // ''
 * ```
 */
export declare function stripTrailingSlash(url: string): string;
/**
 * Removes the leading slash from a URL if it exists.
 *
 * @param url - The URL string from which to remove the leading slash.
 * @returns The URL string without a leading slash.
 *
 * @example
 * ```js
 * stripLeadingSlash('/path'); // 'path'
 * stripLeadingSlash('/path/');  // 'path/'
 * stripLeadingSlash('/'); // '/'
 * stripLeadingSlash(''); // ''
 * ```
 */
export declare function stripLeadingSlash(url: string): string;
/**
 * Adds a leading slash to a URL if it does not already have one.
 *
 * @param url - The URL string to which the leading slash will be added.
 * @returns The URL string with a leading slash.
 *
 * @example
 * ```js
 * addLeadingSlash('path'); // '/path'
 * addLeadingSlash('/path'); // '/path'
 * ```
 */
export declare function addLeadingSlash(url: string): string;
/**
 * Adds a trailing slash to a URL if it does not already have one.
 *
 * @param url - The URL string to which the trailing slash will be added.
 * @returns The URL string with a trailing slash.
 *
 * @example
 * ```js
 * addTrailingSlash('path'); // 'path/'
 * addTrailingSlash('path/'); // 'path/'
 * ```
 */
export declare function addTrailingSlash(url: string): string;
/**
 * Joins URL parts into a single URL string.
 *
 * This function takes multiple URL segments, normalizes them by removing leading
 * and trailing slashes where appropriate, and then joins them into a single URL.
 *
 * @param parts - The parts of the URL to join. Each part can be a string with or without slashes.
 * @returns The joined URL string, with normalized slashes.
 *
 * @example
 * ```js
 * joinUrlParts('path/', '/to/resource'); // '/path/to/resource'
 * joinUrlParts('/path/', 'to/resource'); // '/path/to/resource'
 * joinUrlParts('http://localhost/path/', 'to/resource'); // 'http://localhost/path/to/resource'
 * joinUrlParts('', ''); // '/'
 * ```
 */
export declare function joinUrlParts(...parts: string[]): string;