/** is web url */
export declare function isUrl(url: string): boolean;
/** is in lower case */
export declare function isLowerCase(value: string): boolean;
/** is in upper case */
export declare function isUpperCase(value: string): boolean;
/** is start with upper case */
export declare function isStartWithUpperCase(value: string): boolean;
/** is array */
export declare function isArray(value: any): value is Array<any>;
/** is phone number */
export declare function isPhone(value: string): boolean;
/** is phone number */
export declare function isPhone(value: number): boolean;
/** is phone number */
export declare function isPhone(value: string | number): boolean;
/** is ID card number*/
export declare function isIdCard(value: number): boolean;
/** is ID card number*/
export declare function isIdCard(value: string): boolean;
/** is ID card number*/
export declare function isIdCard(value: number | string): boolean;
/**
 * is email
 */
export declare function isEmail(value: string): boolean;
/** is json */
export declare function isJson<T>(value: T): boolean;