70 lines
3.1 KiB
Markdown
70 lines
3.1 KiB
Markdown
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# is-data-view <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
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[![github actions][actions-image]][actions-url]
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[![coverage][codecov-image]][codecov-url]
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[![License][license-image]][license-url]
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[![Downloads][downloads-image]][downloads-url]
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[![npm badge][npm-badge-png]][package-url]
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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.
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## Example
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```js
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var isDataView = require('is-data-view');
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var assert = require('assert');
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assert.equal(false, isDataView(undefined));
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assert.equal(false, isDataView(null));
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assert.equal(false, isDataView(false));
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assert.equal(false, isDataView(true));
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assert.equal(false, isDataView([]));
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assert.equal(false, isDataView({}));
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assert.equal(false, isDataView(/a/g));
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assert.equal(false, isDataView(new RegExp('a', 'g')));
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assert.equal(false, isDataView(new Date()));
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assert.equal(false, isDataView(42));
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assert.equal(false, isDataView(NaN));
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assert.equal(false, isDataView(Infinity));
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assert.equal(false, isDataView(new Number(42)));
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assert.equal(false, isDataView('foo'));
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assert.equal(false, isDataView(Object('foo')));
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assert.equal(false, isDataView(function () {}));
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assert.equal(false, isDataView(function* () {}));
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assert.equal(false, isDataView(x => x * x));
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assert.equal(false, isDataView([]));
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assert.equal(false, isDataView(new Int8Array()));
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assert.equal(false, isDataView(new Uint8Array()));
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assert.equal(false, isDataView(new Uint8ClampedArray()));
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assert.equal(false, isDataView(new Int16Array()));
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assert.equal(false, isDataView(new Uint16Array()));
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assert.equal(false, isDataView(new Int32Array()));
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assert.equal(false, isDataView(new Uint32Array()));
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assert.equal(false, isDataView(new Float32Array()));
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assert.equal(false, isDataView(new Float64Array()));
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assert.equal(false, isDataView(new BigInt64Array()));
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assert.equal(false, isDataView(new BigUint64Array()));
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assert.ok(isDataView(new DataView(new ArrayBuffer(0))));
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```
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## Tests
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Simply clone the repo, `npm install`, and run `npm test`
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[package-url]: https://npmjs.org/package/is-data-view
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[npm-version-svg]: https://versionbadg.es/inspect-js/is-data-view.svg
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[deps-svg]: https://david-dm.org/inspect-js/is-data-view.svg
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[deps-url]: https://david-dm.org/inspect-js/is-data-view
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[dev-deps-svg]: https://david-dm.org/inspect-js/is-data-view/dev-status.svg
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[dev-deps-url]: https://david-dm.org/inspect-js/is-data-view#info=devDependencies
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[npm-badge-png]: https://nodei.co/npm/is-data-view.png?downloads=true&stars=true
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[license-image]: https://img.shields.io/npm/l/is-data-view.svg
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[license-url]: LICENSE
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[downloads-image]: https://img.shields.io/npm/dm/is-data-view.svg
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[downloads-url]: https://npm-stat.com/charts.html?package=is-data-view
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[codecov-image]: https://codecov.io/gh/inspect-js/is-data-view/branch/main/graphs/badge.svg
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[codecov-url]: https://app.codecov.io/gh/inspect-js/is-data-view/
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[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-data-view
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[actions-url]: https://github.com/inspect-js/is-data-view/actions
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