/**
 * Check whether Node.js runtime environment is in development mode.
 *
 * @returns True if current runtime environment is in development environment, false otherwise.
 */
declare const isDev: () => boolean;
/**
 * Check whether Node.js runtime environment is in test mode.
 *
 * @returns True if current runtime environment is in test environment, false otherwise.
 */
declare const isTest: () => boolean;
/**
 * Check whether result is a Promise.
 *
 * @param	p The result to check.
 * @returns	True if result is a Promise, false otherwise.
 */
declare const isPromise: <T>(p: unknown) => p is Promise<T>;
/**
 * Check whether variable is an AsyncFunction.
 *
 * @param	f The variable to check.
 * @returns	True if variable is an AsyncFunction, false otherwise.
 */
declare const isAsyncFunction: <T extends CallableFunction>(f: T) => f is T;
/**
 * Check whether a variable is a string or not.
 *
 * @param	s The variable to check.
 * @returns	boolean
 */
declare const isString: (s: unknown) => s is string;
/**
 * Check if object is array.
 *
 * @param	a The object / array to check.
 *
 * @returns	boolean
 */
declare const isArray: (a: unknown) => a is Array<unknown>;
/**
 * Check whether an Array is an empty Array.
 *
 * @param	a The Array to check.
 * @returns	True if the Array has no entries, false otherwise.
 */
declare const isEmptyArray: <T>(a: Array<T>) => boolean;
/**
 * Check if object is an object.
 *
 * @param	a The object / array to check.
 *
 * @returns	boolean
 */
declare const isObject: (a: unknown) => a is object;
/**
 * Check whether an object is an empty object.
 *
 * @param	obj The object to check.
 * @returns	True if the object has no entries, false otherwise.
 */
declare const isEmptyObject: (obj: object) => boolean;
/**
 * Check if string is a valid JSON object.
 *
 * @param	string
 *
 * @returns	boolean
 */
declare const isJson: (string: unknown) => string is string;
/**
 * Check whether a variable is a NodeList or not.
 *
 * @param	n The variable to check.
 * @returns	boolean
 */
declare const isNodeList: (n: unknown) => n is NodeList;
/**
 * Check whether a variable is an HTML DOM Element or not.
 *
 * @param 	e The variable to check.
 * @returns	boolean
 */
declare const isNodeElement: (e: unknown) => e is Element;
/**
 * Check if event is a TouchEvent.
 *
 * @param	event The native event interface.
 *
 * @returns	True if event is TouchEvent, false otherwise.
 */
declare const isTouchEvent: (event: Event) => event is TouchEvent;
/**
 * Check if device is a Touch device.
 *
 * @returns	True if device is a Touch device, false otherwise.
 */
declare const isTouchDevice: () => boolean;

export { isArray, isAsyncFunction, isDev, isEmptyArray, isEmptyObject, isJson, isNodeElement, isNodeList, isObject, isPromise, isString, isTest, isTouchDevice, isTouchEvent };