import type { Readable } from 'stream';
/** Minimal shape for Node.js Buffer-like values */
type NodeBufferLike = {
    buffer: ArrayBufferLike;
    isBuffer: true;
};
/** Minimal shape for Node.js writable streams */
type NodeWritableStream = {
    end: (...args: unknown[]) => unknown;
    write: (...args: unknown[]) => unknown;
    writable: boolean;
};
/** Minimal shape for WritableStream-like DOM implementations */
type WritableDOMStreamLike = WritableStream | {
    abort: () => unknown;
    getWriter: () => unknown;
};
/** A DOM or Node readable stream */
export type ReadableStreamType = ReadableStream | Readable;
/** Checks whether a value is a non-null object */
export declare const isObject: (value: unknown) => value is object;
/** Checks whether a value is a plain object (created by the Object constructor) */
export declare const isPureObject: (value: unknown) => value is Record<string, unknown>;
/** Checks whether a value is an ArrayBuffer */
export declare const isArrayBuffer: (value: unknown) => value is ArrayBuffer;
/** Checks whether a value is an ArrayBuffer */
export declare const isSharedArrayBuffer: (value: unknown) => value is SharedArrayBuffer;
/** Checks whether a value is ArrayBuffer-like */
export declare const isArrayBufferLike: (value: unknown) => value is ArrayBufferLike;
/** Checks whether a value behaves like a promise */
export declare const isPromise: (value: unknown) => value is Promise<unknown>;
/** Checks whether a value implements the iterable protocol */
export declare const isIterable: (value: unknown) => value is Iterable<unknown>;
/** Checks whether a value implements the async iterable protocol */
export declare const isAsyncIterable: (value: unknown) => value is AsyncIterable<unknown>;
/** Checks whether a value is an iterator (has a next function) */
export declare const isIterator: (value: unknown) => value is Iterator<unknown>;
/** Checks whether a value is a fetch Response or a duck-typed equivalent */
export declare const isResponse: (value: unknown) => value is Response;
/** Checks whether a value is a File */
export declare const isFile: (value: unknown) => value is File;
/** Checks whether a value is a Blob */
export declare const isBlob: (value: unknown) => value is Blob;
/** Checks for Node.js Buffers without triggering bundlers to include the Buffer polyfill */
export declare const isBuffer: (value: unknown) => value is NodeBufferLike;
/** Checks whether a value looks like a DOM WritableStream */
export declare const isWritableDOMStream: (value: unknown) => value is WritableDOMStreamLike;
/** Checks whether a value looks like a DOM ReadableStream */
export declare const isReadableDOMStream: (value: unknown) => value is ReadableStream;
/** Checks whether a value looks like a Node.js writable stream */
export declare const isWritableNodeStream: (value: unknown) => value is NodeWritableStream;
/** Checks whether a value looks like a Node.js readable stream */
export declare const isReadableNodeStream: (value: unknown) => value is Readable;
/** Checks whether a value is any readable stream (DOM or Node.js) */
export declare const isReadableStream: (value: unknown) => value is ReadableStreamType;
/** Checks whether a value is any writable stream (DOM or Node.js) */
export declare const isWritableStream: (value: unknown) => value is WritableStream | NodeWritableStream;
export {};
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