ArrayBuffer.
npm install @stdlib/array-bufferWe 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. The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases. When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there. To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
About stdlib...
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> [Constructor][mdn-arraybuffer] which returns an object used to represent a generic, fixed-length raw binary data buffer.
``bash`
npm install @stdlib/array-buffer
`javascript`
var ArrayBuffer = require( '@stdlib/array-buffer' );
#### ArrayBuffer( size )
Returns an [ArrayBuffer][mdn-arraybuffer] having a specified number of bytes.
`javascript`
var buf = new ArrayBuffer( 5 );
// returns
*
#### ArrayBuffer.length
Number of input arguments the constructor accepts.
`javascript`
var len = ArrayBuffer.length;
// returns 1
#### ArrayBuffer.prototype.byteLength
Read-only property which returns the length (in bytes) of the [ArrayBuffer][mdn-arraybuffer].
`javascript`
var buf = new ArrayBuffer( 5 );
var byteLength = buf.byteLength;
// returns 5
*
#### ArrayBuffer.isView( arr )
Static method which returns a boolean indicating if provided a buffer view.
`javascript
var Float64Array = require( '@stdlib/array-float64' );
var view = new Float64Array( 10 );
var bool = ArrayBuffer.isView( view );
// returns true
`
#### ArrayBuffer.prototype.slice( \[start\[, end]] )
Copies the bytes of an ArrayBuffer to a new [ArrayBuffer][mdn-arraybuffer].
`javascript
var b1 = new ArrayBuffer( 10 );
var b2 = b1.slice();
// returns
var bool = ( b2 === b1 );
// returns false
`
By default, the method copies from the beginning of the [ArrayBuffer][mdn-arraybuffer]. To beginning copying from a different byte index, provide a start argument, specifying the starting byte index (inclusive).
`javascript
var b1 = new ArrayBuffer( 10 );
var b2 = b1.slice( 2 );
var nbytes = b2.byteLength;
// returns 8
`
If start < 0, the index is relative to the end of the [ArrayBuffer][mdn-arraybuffer].
`javascript
var b1 = new ArrayBuffer( 10 );
var b2 = b1.slice( -2 );
var nbytes = b2.byteLength;
// returns 2
`
By default, the method copies to the end of the [ArrayBuffer][mdn-arraybuffer]. To copy until a particular byte index, provide an end index, specifying the ending byte index (exclusive).
`javascript
var b1 = new ArrayBuffer( 10 );
var b2 = b1.slice( 2, 6 );
var nbytes = b2.byteLength;
// returns 4
`
If end < 0, the index is relative to the end of the [ArrayBuffer][mdn-arraybuffer].
`javascript
var b1 = new ArrayBuffer( 10 );
var b2 = b1.slice( 2, -2 );
var nbytes = b2.byteLength;
// returns 6
`
*
`javascript
var randu = require( '@stdlib/random-base-randu' );
var Float64Array = require( '@stdlib/array-float64' );
var Uint8Array = require( '@stdlib/array-uint8' );
var toBinaryString = require( '@stdlib/number-uint8-base-to-binary-string' );
var ArrayBuffer = require( '@stdlib/array-buffer' );
var bytes;
var buf;
var arr;
var i;
// Create a new ArrayBuffer:
buf = new ArrayBuffer( 64 );
// Create a Float64 array buffer view:
arr = new Float64Array( buf.byteLength/8 );
for ( i = 0; i < arr.length; i++ ) {
arr[ i ] = randu() * 100.0;
}
// Create a "bytes" view of the array buffer:
bytes = new Uint8Array( arr.buffer );
// Print the bytes:
for ( i = 0; i < bytes.length; i++ ) {
console.log( 'byte %d: %s', i, toBinaryString( bytes[ i ] ) );
}
`
*
- [@stdlib/buffer-ctor][@stdlib/buffer/ctor]: Buffer.
- [@stdlib/array-float32][@stdlib/array/float32]: Float32Array.
- [@stdlib/array-float64][@stdlib/array/float64]: Float64Array.
- [@stdlib/array-int16][@stdlib/array/int16]: Int16Array.
- [@stdlib/array-int32][@stdlib/array/int32]: Int32Array.
- [@stdlib/array-int8][@stdlib/array/int8]: Int8Array.
- [@stdlib/array-shared-buffer][@stdlib/array/shared-buffer]: SharedArrayBuffer.
- [@stdlib/array-uint16][@stdlib/array/uint16]: Uint16Array.
- [@stdlib/array-uint32][@stdlib/array/uint32]: Uint32Array.
- [@stdlib/array-uint8][@stdlib/array/uint8]: Uint8Array.
- [@stdlib/array-uint8c][@stdlib/array/uint8c]: Uint8ClampedArray.
*
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].
[npm-image]: http://img.shields.io/npm/v/@stdlib/array-buffer.svg
[npm-url]: https://npmjs.org/package/@stdlib/array-buffer
[test-image]: https://github.com/stdlib-js/array-buffer/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/array-buffer/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/array-buffer/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/array-buffer?branch=main
[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
[chat-url]: https://stdlib.zulipchat.com
[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/array-buffer/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-buffer/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-buffer/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-buffer/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-buffer/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-buffer/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-buffer/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-buffer/main/LICENSE
[mdn-arraybuffer]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
[@stdlib/buffer/ctor]: https://www.npmjs.com/package/@stdlib/buffer-ctor
[@stdlib/array/float32]: https://www.npmjs.com/package/@stdlib/array-float32
[@stdlib/array/float64]: https://www.npmjs.com/package/@stdlib/array-float64
[@stdlib/array/int16]: https://www.npmjs.com/package/@stdlib/array-int16
[@stdlib/array/int32]: https://www.npmjs.com/package/@stdlib/array-int32
[@stdlib/array/int8]: https://www.npmjs.com/package/@stdlib/array-int8
[@stdlib/array/shared-buffer]: https://www.npmjs.com/package/@stdlib/array-shared-buffer
[@stdlib/array/uint16]: https://www.npmjs.com/package/@stdlib/array-uint16
[@stdlib/array/uint32]: https://www.npmjs.com/package/@stdlib/array-uint32
[@stdlib/array/uint8]: https://www.npmjs.com/package/@stdlib/array-uint8
[@stdlib/array/uint8c]: https://www.npmjs.com/package/@stdlib/array-uint8c