import * as React from "react";
/**
 * Copy the given child and add the new props.
 */
export declare function copy(child: any, props: any): React.DetailedReactHTMLElement<any, HTMLElement>;
/**
 * Returns a params object containing the parsed tokens from the path if the
 * URI matches the path's pattern.  Otherwise, null is returned.
 */
export declare function parseParams<T = object>(path: string, uri: string, exact: boolean): T;
/**
 * Parses a query string into an object.
 */
export declare function parseQuery<T = object>(query: string): T;
/**
 * Normalize a path to end with a single, trailing "/".
 */
export declare function normalizePath(path: string): string;