/**
 * Represents an asynchronous function.
 */
type AsyncFunction<TArgs extends Array<any> = Array<any>, TReturn = any> = (...args: TArgs) => Promise<TReturn>;
/**
 * Represents the type of a class.
 *
 * @since v1.5.6
 */
type ConstructorType<T = any> = new (...args: any[]) => T;
/**
 * Represents the type of a function.
 *
 * @since v1.5.6
 */
type FunctionType<T = any> = (...args: any[]) => T;
/**
 * @private
 */
type ThisArgsFn<T = any> = (thisArg: T, ...args: any[]) => T;
/**
 * Defines the type of a primitive wrapper constructor.
 */
interface PrimitiveWrapperCtor {
    prototype: {
        valueOf: FunctionType;
    };
}
/**
 * Defines a base utility class.
 */
export declare abstract class Utils {
    /**
     * @constructor
     *
     * @private
     */
    private constructor();
    /**
     * Gets the global object.
     */
    static get globalThat(): typeof globalThis | (Window & typeof globalThis);
    /**
     * Checks whether the specified value is `arguments`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is `arguments`.
     */
    static isArguments(value?: any): value is IArguments;
    /**
     * Checks whether the specified value is an asynchronous function.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is an asynchronous function.
     */
    static isAsyncFunction(value?: any): value is AsyncFunction;
    /**
     * Checks whether the given value is of boolean type.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is of boolean type.
     */
    static isBoolean(value?: any): value is boolean;
    /**
     * Checks whether the specified value is of type `DataView`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is of type `DataView`.
     */
    static isDataView(value?: any): value is DataView;
    /**
     * Checks whether the given value is defined.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is defined.
     */
    static isDefined<T>(value?: T | undefined): value is T;
    /**
     * Checks whether the specified value is an `Error` instance.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is an error instance.
     *
     * @since v1.5.6
     */
    static isError(value?: any): value is Error;
    /**
     * Checks whether the given value is falsy i. e.: `null`, `undefined`,
     * `false`, `NaN`, `0`, `-0`, `0n` or `''`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is falsy.
     */
    static isFalsy(value?: any): value is null | undefined | false | 0 | -0 | 0n | '';
    /**
     * Checks whether the specified value is a `File` instance.
     *
     * **Usage Examples:**
     * ```typescript
     * Utils.isFile(null); // false
     * Utils.isFile(new File([], "abc")); // true
     * ```
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a `File` instance.
     *
     * @since v1.5.6
     */
    static isFile(value?: any): value is File;
    /**
     * Checks whether the specified value is a `FormData` object.
     *
     * **Usage Examples:**
     * ```typescript
     * const formData = new FormData();
     * formData.append('a', 'abc');
     * Utils.isFormData(formData); // true
     * ```
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a `FormData` object.
     *
     * @since v1.6.7
     */
    static isFormData(value?: any): value is FormData;
    /**
     * Checks whether the given value is a function.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is a function.
     */
    static isFunction(value?: any): value is Function;
    /**
     * Checks whether the specified value is a generator object.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a generator object.
     */
    static isGeneratorObject(value?: any): value is Generator;
    /**
     * Checks whether the specified value is a JSON string.
     *
     * @param {*} value Contains some value.
     * @param {Boolean} approx Contains whether not to deep check the
     * specified value whether it is a JSON string.
     * @return {Boolean} whether the specified value is a JSON string.
     */
    static isJson(value?: any, approx?: boolean): boolean;
    /**
     * Checks whether the given value is neither `null` nor `undefined`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is neither `null` nor
     * `undefined`.
     */
    static isNotNil<T>(value?: T | null | undefined): value is T;
    /**
     * Checks whether the given value is not `null`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is not `null`.
     */
    static isNotNull<T>(value?: T | null): value is T;
    /**
     * Checks whether the given value is not `undefined`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is not `undefined`.
     */
    static isNotUndefined<T>(value?: T | undefined): value is T;
    /**
     * Checks whether the given value is null.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is `null`.
     */
    static isNull(value?: any): value is null;
    /**
     * Checks whether the given value is `null` or `undefined`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is `null` or `undefined`.
     */
    static isNullOrUndefined(value?: any): value is null | undefined;
    /**
     * Checks whether the given value is of primitive type. In JavaScript
     * there are 7 primitive types: `string`, `number`, `bigint`, `boolean`,
     * `undefined`, `symbol` and `null`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is of primitive type.
     */
    static isPrimitive(value?: any): value is bigint | boolean | null | number | string | symbol | undefined;
    /**
     * Checks whether the specified value is a `Promise`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a JavaScript `promise`.
     *
     * @since v1.5.6
     */
    static isPromise(value?: any): value is Promise<any>;
    /**
     * Checks whether the specified value is a `PromiseLike<T>` object.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a `PromiseLike<T>` object.
     *
     * @since v1.6.7
     */
    static isPromiseLike(value?: any): value is PromiseLike<any>;
    /**
     * Checks whether the specified value is a regular expression.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a regular expression.
     */
    static isRegExp(value?: any): value is RegExp;
    /**
     * Checks whether the specified value is a symbol.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a symbol.
     */
    static isSymbol(value?: any): value is symbol;
    /**
     * Checks whether the specified value is a `Symbol` object.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a `Symbol` object.
     */
    static isSymbolObject(value?: any): value is (typeof Symbol extends undefined ? false : Symbol);
    /**
     * Checks whether the given value is not falsy i. e. not: `null`, `undefined`,
     * `false`, `NaN`, `0`, `-0`, `0n` or `''`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is not falsy.
     */
    static isTruthy<T>(value?: T | null | undefined | false | 0 | -0 | 0n | ''): value is T;
    /**
     * Checks whether the given value is not defined.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is not defined.
     */
    static isUndefined(value?: any): value is undefined;
    /**
     * Checks whether the specified value is a web assembly module.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a web assembly module.
     */
    static isWebAssemblyCompiledModule(value?: any): value is WebAssembly.Module;
    /**
     * Checks whether the specified value is a primitive wrapper object.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a primitive wrapper
     * object.
     */
    static isWrappedPrimitive(value?: any): boolean;
    /**
     * Uncurries the specified function.
     *
     * @param {Function} func Contains some function.
     * @return {ThisArgsFn} an uncurried function.
     */
    static uncurry(func: FunctionType): ThisArgsFn;
    /**
     * Checks whether the specified wrapper type is supported.
     *
     * @param {*} value Contains some value.
     * @param {TWrapper} wrapperType Contains the wrapper type constructor.
     * @return {Boolean} whether the specified wrapper type is supported.
     *
     * @private
     */
    static __isPrimitiveWrapperSupported<TWrapper extends PrimitiveWrapperCtor>(value: any, wrapperType: TWrapper): boolean;
}
export type { AsyncFunction, ConstructorType, FunctionType, };