npm package: @stdlib/buffer-from-buffer
Description: Copy buffer data to a new Buffer instance.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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  <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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# copyBuffer

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

> Copy [buffer][@stdlib/buffer/ctor] data to a new [`Buffer`][@stdlib/buffer/ctor] instance.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/buffer-from-buffer
```

</section>

<section class="usage">

## Usage

```javascript
var copyBuffer = require( '@stdlib/buffer-from-buffer' );
```

#### copyBuffer( buffer )

Copies [buffer][@stdlib/buffer/ctor] data to a new [`Buffer`][@stdlib/buffer/ctor] instance.

```javascript
var array2buffer = require( '@stdlib/buffer-from-array' );

var b1 = array2buffer( [ 1, 2, 3, 4 ] );
// returns <Buffer>[ 1, 2, 3, 4 ]

var b2 = copyBuffer( b1 );
// returns <Buffer>[ 1, 2, 3, 4 ]
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var allocUnsafe = require( '@stdlib/buffer-alloc-unsafe' );
var copyBuffer = require( '@stdlib/buffer-from-buffer' );

var bool;
var b1;
var b2;
var i;

// Allocate a new buffer:
b1 = allocUnsafe( 10 );

// Generate a new buffer from the existing buffer:
b2 = copyBuffer( b1 );

bool = ( b2 === b1 );
// returns false

bool = ( b2.length === b1.length );
// returns true

for ( i = 0; i < b2.length; i++ ) {
    console.log( b2[ i ] === b1[ i ] );
    // => true
}
```

</section>

<!-- /.examples -->

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* * *

## See Also

-   <span class="package-name">[`@stdlib/buffer-alloc-unsafe`][@stdlib/buffer/alloc-unsafe]</span><span class="delimiter">: </span><span class="description">allocate a buffer having a specified number of bytes.</span>
-   <span class="package-name">[`@stdlib/buffer-ctor`][@stdlib/buffer/ctor]</span><span class="delimiter">: </span><span class="description">Buffer.</span>

</section>

<!-- /.related -->

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<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].

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

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

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/buffer-from-buffer/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/buffer-from-buffer?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/buffer-from-buffer/tree/deno
[deno-readme]: https://github.com/stdlib-js/buffer-from-buffer/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/buffer-from-buffer/tree/umd
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[esm-url]: https://github.com/stdlib-js/buffer-from-buffer/tree/esm
[esm-readme]: https://github.com/stdlib-js/buffer-from-buffer/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/buffer-from-buffer/blob/main/branches.md

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

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

[@stdlib/buffer/alloc-unsafe]: https://www.npmjs.com/package/@stdlib/buffer-alloc-unsafe

[@stdlib/buffer/ctor]: https://www.npmjs.com/package/@stdlib/buffer-ctor

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</section>

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