export declare function isArray(obj: any): obj is any[];
export declare function isNull(obj: any): obj is null;
export declare function isBoolean(obj: unknown): obj is boolean;
export declare function isObject(obj: any): obj is Record<string, unknown>;
export declare const isPromise: <T>(obj: unknown) => obj is Promise<T>;
export declare function isString(obj: any): obj is string;
export declare function isNumber(obj: any): obj is number;
export declare function isRegExp(obj: any): boolean;
export declare function isDate(obj: any): boolean;
export declare function isColor(color: any): boolean;
export declare function isUndefined(obj: any): obj is undefined;
export declare function isFunction(obj: any): obj is (...args: any[]) => any;
export declare function isClass(value: unknown): boolean;
export declare function isEmptyObject(obj: any): boolean;
export declare function isEmpty(obj: any): boolean;
export declare function isExist(obj: any): boolean;
export declare function isWindow(el: any): el is Window;
export declare function isPhone(phone: unknown): boolean;
export declare function isEmail(email: unknown): boolean;