/**
 * Normalize a path:
 * + Empty paths are represented as an empty string.
 * + Non-empty paths start with a slash.
 *
 * @param path The path to normalize.
 * @param preserveDir True to keep trailing slashes in non-empty paths. Default is `true`.
 * @returns The normalized path.
 */
export declare function normalize(path: string, preserveDir?: boolean): string;
/**
 * Join two paths.
 *
 * Note, that this dosn't handle empty, ".." or "." parts.
 *
 * @param parent The parent path.
 * @param child The child path.
 * @param preserveDir True to keep trailing slashes. Default is `true`.
 * @returns A {@link normalize normalized} path.
 */
export declare function join(parent: string, child: string, preserveDir?: boolean): string;
/**
 * Get a normalized relative path.
 *
 * Note, that this dosn't handle empty, ".." or "." parts, but inserts ".." parts if necessary.
 *
 * @param from The path from which the relative path starts.
 * @param to The path to which the relative path points.
 * @param preserveDir True to keep trailing slashes from the `to` path. Trailing slashes from the `from` path are always discarded. Default is `true`.
 * @returns A {@link normalize normalized} path.
 */
export declare function relative(from: string, to: string, preserveDir?: boolean): string;