export { isAndroid, isIOS } from './platform'; type PlainObject = Record; export declare function isPlainObject(target: unknown): target is PlainObject; export declare function isFunction(target: unknown): target is (...args: any[]) => any; export declare function isString(target: unknown): target is string; export declare function isNumber(target: unknown): target is number; export declare function isBoolean(target: unknown): target is boolean; export declare function isUndefined(target: unknown): target is undefined; export declare function isNullish(target: unknown): target is null | undefined; export declare function isNotReactNode(target: unknown): boolean; export declare function isVisibleEmpty(target: unknown): boolean; export declare function isEmptyValue(value: unknown, whitespace?: boolean): boolean; export declare const isRN: boolean; export declare const isH5: boolean; export declare const isMP: boolean; export declare const isPC: boolean;