export declare const isValidEmail: (value?: string) => boolean;
/**
 * Verify if a string has a given length or not.
 */
export declare const validateLength: (value: string | undefined, minLength: number) => boolean;
/**
 * Check the password complexity
 * @param password Password to validate
 * @returns Whether the password various criteria
 */
export declare function isValidPassword(password: string): boolean;
export declare function isValidUrl(url: string): boolean;
