Test if a value is Node stream-like.
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> Test if a value is Node [stream][nodejs-stream]-like.
``bash`
npm install @stdlib/assert-is-node-stream-like
`javascript`
var isNodeStreamLike = require( '@stdlib/assert-is-node-stream-like' );
#### isNodeStreamLike( value )
Tests if a value is Node [stream][nodejs-stream]-like.
`javascript
var transformStream = require( '@stdlib/streams-node-transform' );
var bool = isNodeStreamLike( transformStream() );
// returns true
`
`javascript
var stream = require( 'stream' );
var transformStream = require( '@stdlib/streams-node-transform' );
var isNodeStreamLike = require( '@stdlib/assert-is-node-stream-like' );
var bool = isNodeStreamLike( new stream.Stream() );
// returns true
bool = isNodeStreamLike( new stream.Readable() );
// returns true
bool = isNodeStreamLike( new stream.Writable() );
// returns true
bool = isNodeStreamLike( new stream.Duplex() );
// returns true
bool = isNodeStreamLike( new stream.Transform() );
// returns true
bool = isNodeStreamLike( transformStream() );
// returns true
bool = isNodeStreamLike( {} );
// returns false
bool = isNodeStreamLike( [] );
// returns false
bool = isNodeStreamLike( null );
// returns false
function Stream() {
return this;
}
bool = isNodeStreamLike( Stream );
// returns false
bool = isNodeStreamLike( new Stream() );
// returns false
`
*
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].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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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-stream-like/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-node-stream-like/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-node-stream-like/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-node-stream-like/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-node-stream-like/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-node-stream-like/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-node-stream-like/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-node-stream-like/main/LICENSE
[nodejs-stream]: https://nodejs.org/api/stream.html