Copy buffer data to a new Buffer instance.
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> Copy [buffer][@stdlib/buffer/ctor] data to a new [Buffer][@stdlib/buffer/ctor] instance.
``bash`
npm install @stdlib/buffer-from-buffer
`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
var b2 = copyBuffer( b1 );
// returns
`
`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
}
`
*
- [@stdlib/buffer-alloc-unsafe][@stdlib/buffer/alloc-unsafe]: allocate a buffer having a specified number of bytes.
- [@stdlib/buffer-ctor][@stdlib/buffer/ctor]: Buffer.
*
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]
---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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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
[umd-readme]: https://github.com/stdlib-js/buffer-from-buffer/blob/umd/README.md
[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
[@stdlib/buffer/alloc-unsafe]: https://www.npmjs.com/package/@stdlib/buffer-alloc-unsafe
[@stdlib/buffer/ctor]: https://www.npmjs.com/package/@stdlib/buffer-ctor