DataView.
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> [Constructor][mdn-dataview] which returns a data view representing a provided array buffer.
``bash`
npm install @stdlib/array-dataview
`javascript`
var DataView = require( '@stdlib/array-dataview' );
#### DataView( buffer\[, byteOffset\[, byteLength]] )
Returns a [DataView][mdn-dataview] representing a provided array buffer.
`javascript
var ArrayBuffer = require( '@stdlib/array-buffer' );
var buf = new ArrayBuffer( 5 );
// returns
var dv = new DataView( buf );
// returns
`
*
#### DataView.prototype.buffer
Read-only property which returns the underlying array buffer.
`javascript
var ArrayBuffer = require( '@stdlib/array-buffer' );
var buf1 = new ArrayBuffer( 5 );
var dv = new DataView( buf1 );
var buf2 = dv.buffer;
// returns
var bool = ( buf1 === buf2 );
// returns true
`
#### DataView.prototype.byteLength
Read-only property which returns the length (in bytes) of the [DataView][mdn-dataview].
`javascript
var ArrayBuffer = require( '@stdlib/array-buffer' );
var buf = new ArrayBuffer( 5 );
var dv = new DataView( buf );
var byteLength = dv.byteLength;
// returns 5
`
#### DataView.prototype.byteOffset
Read-only property which returns the number of bytes from the [DataView][mdn-dataview] to the start of the underlying array buffer.
`javascript
var ArrayBuffer = require( '@stdlib/array-buffer' );
var buf = new ArrayBuffer( 5 );
var dv = new DataView( buf, 3 );
var byteOffset = dv.byteOffset;
// returns 3
`
*
TODO: document methods
*
`javascript
var IS_LITTLE_ENDIAN = require( '@stdlib/assert-is-little-endian' );
var toBinaryString = require( '@stdlib/number-uint8-base-to-binary-string' );
var randu = require( '@stdlib/random-base-randu' );
var Uint8Array = require( '@stdlib/array-uint8' );
var ArrayBuffer = require( '@stdlib/array-buffer' );
var DataView = require( '@stdlib/array-dataview' );
// Create a new ArrayBuffer:
var buf = new ArrayBuffer( 64 );
// Create a new DataView:
var dv = new DataView( buf );
// Set values in the view:
var i;
for ( i = 0; i < dv.byteLength/8; i++ ) {
dv.setFloat64( i8, randu()100.0, IS_LITTLE_ENDIAN );
}
// Create a "bytes" view of the underlying array buffer:
var bytes = new Uint8Array( dv.buffer );
// Print the bytes:
for ( i = 0; i < bytes.length; i++ ) {
console.log( 'byte %d: %s', i, toBinaryString( bytes[ i ] ) );
}
`
*
- [@stdlib/array-buffer][@stdlib/array/buffer]: ArrayBuffer.
- [@stdlib/array-typed][@stdlib/array/typed]: create a typed array.
*
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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[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/array-dataview/tree/deno
[deno-readme]: https://github.com/stdlib-js/array-dataview/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/array-dataview/tree/umd
[umd-readme]: https://github.com/stdlib-js/array-dataview/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/array-dataview/tree/esm
[esm-readme]: https://github.com/stdlib-js/array-dataview/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/array-dataview/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/array-dataview/main/LICENSE
[mdn-dataview]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView
[@stdlib/array/buffer]: https://www.npmjs.com/package/@stdlib/array-buffer
[@stdlib/array/typed]: https://www.npmjs.com/package/@stdlib/array-typed