npm package: @stdlib/assert-is-buffer
Description: Test if a value is a Buffer object.
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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</details>

# isBuffer

[![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 a [Buffer][node-buffer] object.

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-is-buffer
```

</section>

<section class="usage">

## Usage

```javascript
var isBuffer = require( '@stdlib/assert-is-buffer' );
```

#### isBuffer( value )

Tests if a `value` is a [`Buffer`][node-buffer] object.

<!-- TODO: update once Buffer wrapper -->

<!-- eslint-disable no-buffer-constructor -->

```javascript
var Buffer = require( '@stdlib/buffer-ctor' );

var value = new Buffer( [ 1, 2, 3, 4 ] );

var bool = isBuffer( value );
// returns true
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   The implementation supports both [Node.js][node-buffer] and [browser polyfill][browser-buffer] `Buffer` objects.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- TODO: update once Buffer wrapper -->

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

<!-- eslint-disable no-buffer-constructor, no-restricted-syntax, no-empty-function -->

```javascript
var Int8Array = require( '@stdlib/array-int8' );
var Buffer = require( '@stdlib/buffer-ctor' );
var isBuffer = require( '@stdlib/assert-is-buffer' );

var bool = isBuffer( new Buffer( [ 1, 2, 3, 4 ] ) );
// returns true

bool = isBuffer( new Buffer( 'beep' ) );
// returns true

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

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

bool = isBuffer( new Int8Array() );
// returns false

bool = isBuffer( function foo() {} );
// returns false

bool = isBuffer( null );
// returns false

bool = isBuffer( void 0 );
// returns false

bool = isBuffer( 'beep' );
// returns false

bool = isBuffer( 5 );
// returns false
```

</section>

<!-- /.examples -->

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

<section class="related">

</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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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/assert-is-buffer.svg
[npm-url]: https://npmjs.org/package/@stdlib/assert-is-buffer

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

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

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

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

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

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-buffer/main/LICENSE

[node-buffer]: http://nodejs.org/api/buffer.html

[browser-buffer]: https://github.com/feross/buffer

</section>

<!-- /.links -->