Test if a value is a DataView.
npm install @stdlib/assert-is-dataviewWe 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]
> Test if a value is a [DataView][mdn-dataview].
``bash`
npm install @stdlib/assert-is-dataview
`javascript`
var isDataView = require( '@stdlib/assert-is-dataview' );
#### isDataView( value )
Tests if a value is a [DataView][mdn-dataview].
`javascript
var ArrayBuffer = require( '@stdlib/array-buffer' );
var DataView = require( '@stdlib/array-dataview' );
var bool = isDataView( new DataView( new ArrayBuffer( 10 ) ) );
// returns true
bool = isDataView( [] );
// returns false
`
`javascript
var Float32Array = require( '@stdlib/array-float32' );
var Float64Array = require( '@stdlib/array-float64' );
var Int8Array = require( '@stdlib/array-int8' );
var Int16Array = require( '@stdlib/array-int16' );
var Int32Array = require( '@stdlib/array-int32' );
var Uint8Array = require( '@stdlib/array-uint8' );
var Uint8ClampedArray = require( '@stdlib/array-uint8c' );
var Uint16Array = require( '@stdlib/array-uint16' );
var Uint32Array = require( '@stdlib/array-uint32' );
var ArrayBuffer = require( '@stdlib/array-buffer' );
var DataView = require( '@stdlib/array-dataview' );
var isDataView = require( '@stdlib/assert-is-dataview' );
var bool = isDataView( new DataView( new ArrayBuffer( 10 ) ) );
// returns true
bool = isDataView( new Float32Array( 10 ) );
// returns false
bool = isDataView( new Int8Array( 10 ) );
// returns false
bool = isDataView( new Uint8Array( 10 ) );
// returns false
bool = isDataView( new Uint8ClampedArray( 10 ) );
// returns false
bool = isDataView( new Int16Array( 10 ) );
// returns false
bool = isDataView( new Uint16Array( 10 ) );
// returns false
bool = isDataView( new Int32Array( 10 ) );
// returns false
bool = isDataView( new Uint32Array( 10 ) );
// returns false
bool = isDataView( new Float64Array( 10 ) );
// returns false
bool = isDataView( new Array( 10 ) );
// returns false
bool = isDataView( new ArrayBuffer( 10 ) );
// returns false
bool = isDataView( {} );
// returns false
bool = isDataView( null );
// returns false
`
*
- [@stdlib/assert-is-arraybuffer][@stdlib/assert/is-arraybuffer]: test if a value is an ArrayBuffer.
- [@stdlib/assert-is-typed-array][@stdlib/assert/is-typed-array]: test if a value is 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].
#### 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/assert-is-dataview.svg
[npm-url]: https://npmjs.org/package/@stdlib/assert-is-dataview
[test-image]: https://github.com/stdlib-js/assert-is-dataview/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/assert-is-dataview/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-is-dataview/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/assert-is-dataview?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/assert-is-dataview/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-dataview/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-dataview/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-dataview/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-dataview/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-dataview/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-dataview/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-dataview/main/LICENSE
[mdn-dataview]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView
[@stdlib/assert/is-arraybuffer]: https://www.npmjs.com/package/@stdlib/assert-is-arraybuffer
[@stdlib/assert/is-typed-array]: https://www.npmjs.com/package/@stdlib/assert-is-typed-array