export declare const REGEX_EMAIL: RegExp;
export declare const REGEX_URL: RegExp;
export declare const REGEX_HEX_COLOR: RegExp;
export declare const REGEX_NUMBER: RegExp;
export declare const isEmpty: (value?: string) => boolean;
export declare const maxLength: (value?: string, limit?: number) => boolean;
export declare const minLength: (value?: string, limit?: number) => boolean;
export declare const isEmail: (value?: string) => boolean;
export declare const isURL: (value?: string) => boolean;
export declare const isHexColor: (value?: string) => boolean;
export declare const isNumber: (value?: string) => boolean;
export declare const notEmpty: (value: string) => boolean;