npm package: @stdlib/assert-is-node-duplex-stream-like
Description: Test if a value is Node duplex stream-like.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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# Duplex Stream-like

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Test if a value is Node [duplex stream][nodejs-stream]-like.

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-is-node-duplex-stream-like
```

</section>

<section class="usage">

## Usage

```javascript
var isNodeDuplexStreamLike = require( '@stdlib/assert-is-node-duplex-stream-like' );
```

#### isNodeDuplexStreamLike( value )

Tests if a `value` is Node [duplex stream][nodejs-stream]-like.

```javascript
var transformStream = require( '@stdlib/streams-node-transform' );

var bool = isNodeDuplexStreamLike( transformStream() );
// returns true
```

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var stream = require( 'stream' );
var transformStream = require( '@stdlib/streams-node-transform' );
var isNodeDuplexStreamLike = require( '@stdlib/assert-is-node-duplex-stream-like' );

var bool = isNodeDuplexStreamLike( new stream.Duplex() );
// returns true

bool = isNodeDuplexStreamLike( new stream.Transform() );
// returns true

bool = isNodeDuplexStreamLike( transformStream() );
// returns true

bool = isNodeDuplexStreamLike( new stream.Writable() );
// returns false

bool = isNodeDuplexStreamLike( new stream.Readable() );
// returns false

bool = isNodeDuplexStreamLike( new stream.Stream() );
// returns false

bool = isNodeDuplexStreamLike( {} );
// returns false

bool = isNodeDuplexStreamLike( [] );
// returns false

bool = isNodeDuplexStreamLike( null );
// returns false

function Stream() {
    return this;
}

bool = isNodeDuplexStreamLike( Stream );
// returns false

bool = isNodeDuplexStreamLike( new Stream() );
// returns false
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/assert-is-node-stream-like`][@stdlib/assert/is-node-stream-like]</span><span class="delimiter">: </span><span class="description">test if a value is Node stream-like.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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[npm-url]: https://npmjs.org/package/@stdlib/assert-is-node-duplex-stream-like

[test-image]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-is-node-duplex-stream-like/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/assert-is-node-duplex-stream-like?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-node-duplex-stream-like/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-node-duplex-stream-like/main/LICENSE

[nodejs-stream]: https://nodejs.org/api/stream.html

<!-- <related-links> -->

[@stdlib/assert/is-node-stream-like]: https://www.npmjs.com/package/@stdlib/assert-is-node-stream-like

<!-- </related-links> -->

</section>

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