# is-data-view <sup>[![Version Badge][npm-version-svg]][package-url]</sup>

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[![coverage][codecov-image]][codecov-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]

[![npm badge][npm-badge-png]][package-url]

Is this value a JS DataView? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

## Example

```js
var isDataView = require('is-data-view');
var assert = require('assert');

assert.equal(false, isDataView(undefined));
assert.equal(false, isDataView(null));
assert.equal(false, isDataView(false));
assert.equal(false, isDataView(true));
assert.equal(false, isDataView([]));
assert.equal(false, isDataView({}));
assert.equal(false, isDataView(/a/g));
assert.equal(false, isDataView(new RegExp('a', 'g')));
assert.equal(false, isDataView(new Date()));
assert.equal(false, isDataView(42));
assert.equal(false, isDataView(NaN));
assert.equal(false, isDataView(Infinity));
assert.equal(false, isDataView(new Number(42)));
assert.equal(false, isDataView('foo'));
assert.equal(false, isDataView(Object('foo')));
assert.equal(false, isDataView(function () {}));
assert.equal(false, isDataView(function* () {}));
assert.equal(false, isDataView(x => x * x));
assert.equal(false, isDataView([]));
assert.equal(false, isDataView(new Int8Array()));
assert.equal(false, isDataView(new Uint8Array()));
assert.equal(false, isDataView(new Uint8ClampedArray()));
assert.equal(false, isDataView(new Int16Array()));
assert.equal(false, isDataView(new Uint16Array()));
assert.equal(false, isDataView(new Int32Array()));
assert.equal(false, isDataView(new Uint32Array()));
assert.equal(false, isDataView(new Float32Array()));
assert.equal(false, isDataView(new Float64Array()));
assert.equal(false, isDataView(new BigInt64Array()));
assert.equal(false, isDataView(new BigUint64Array()));

assert.ok(isDataView(new DataView(new ArrayBuffer(0))));
```

## Tests
Simply clone the repo, `npm install`, and run `npm test`

[package-url]: https://npmjs.org/package/is-data-view
[npm-version-svg]: https://versionbadg.es/inspect-js/is-data-view.svg
[deps-svg]: https://david-dm.org/inspect-js/is-data-view.svg
[deps-url]: https://david-dm.org/inspect-js/is-data-view
[dev-deps-svg]: https://david-dm.org/inspect-js/is-data-view/dev-status.svg
[dev-deps-url]: https://david-dm.org/inspect-js/is-data-view#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/is-data-view.png?downloads=true&stars=true
[license-image]: https://img.shields.io/npm/l/is-data-view.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/is-data-view.svg
[downloads-url]: https://npm-stat.com/charts.html?package=is-data-view
[codecov-image]: https://codecov.io/gh/inspect-js/is-data-view/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/inspect-js/is-data-view/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-data-view
[actions-url]: https://github.com/inspect-js/is-data-view/actions