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- # typed-array-length <sup>[![Version Badge][2]][1]</sup>
- [![dependency status][5]][6]
- [![dev dependency status][7]][8]
- [![License][license-image]][license-url]
- [![Downloads][downloads-image]][downloads-url]
- [![npm badge][11]][1]
- Robustly get the length of a Typed Array, or `false` if it is not a Typed Array. Works cross-realm, in every engine, even if the `length` property is overridden.
- ## Example
- ```js
- var typedArrayLength = require('typed-array-length');
- var assert = require('assert');
- assert.equal(false, typedArrayLength(undefined));
- assert.equal(false, typedArrayLength(null));
- assert.equal(false, typedArrayLength(false));
- assert.equal(false, typedArrayLength(true));
- assert.equal(false, typedArrayLength([]));
- assert.equal(false, typedArrayLength({}));
- assert.equal(false, typedArrayLength(/a/g));
- assert.equal(false, typedArrayLength(new RegExp('a', 'g')));
- assert.equal(false, typedArrayLength(new Date()));
- assert.equal(false, typedArrayLength(42));
- assert.equal(false, typedArrayLength(NaN));
- assert.equal(false, typedArrayLength(Infinity));
- assert.equal(false, typedArrayLength(new Number(42)));
- assert.equal(false, typedArrayLength('foo'));
- assert.equal(false, typedArrayLength(Object('foo')));
- assert.equal(false, typedArrayLength(function () {}));
- assert.equal(false, typedArrayLength(function* () {}));
- assert.equal(false, typedArrayLength(x => x * x));
- assert.equal(false, typedArrayLength([]));
- assert.equal(1, typedArrayLength(new Int8Array(1)));
- assert.equal(2, typedArrayLength(new Uint8Array(2)));
- assert.equal(3, typedArrayLength(new Uint8ClampedArray(3)));
- assert.equal(4, typedArrayLength(new Int16Array(4)));
- assert.equal(5, typedArrayLength(new Uint16Array(5)));
- assert.equal(6, typedArrayLength(new Int32Array(6)));
- assert.equal(7, typedArrayLength(new Uint32Array(7)));
- assert.equal(8, typedArrayLength(new Float32Array(8)));
- assert.equal(9, typedArrayLength(new Float64Array(9)));
- assert.equal(10, typedArrayLength(new BigInt64Array(10)));
- assert.equal(11, typedArrayLength(new BigUint64Array(11)));
- ```
- ## Tests
- Simply clone the repo, `npm install`, and run `npm test`
- [1]: https://npmjs.org/package/typed-array-length
- [2]: https://versionbadg.es/inspect-js/typed-array-length.svg
- [5]: https://david-dm.org/inspect-js/typed-array-length.svg
- [6]: https://david-dm.org/inspect-js/typed-array-length
- [7]: https://david-dm.org/inspect-js/typed-array-length/dev-status.svg
- [8]: https://david-dm.org/inspect-js/typed-array-length#info=devDependencies
- [11]: https://nodei.co/npm/typed-array-length.png?downloads=true&stars=true
- [license-image]: http://img.shields.io/npm/l/typed-array-length.svg
- [license-url]: LICENSE
- [downloads-image]: http://img.shields.io/npm/dm/typed-array-length.svg
- [downloads-url]: http://npm-stat.com/charts.html?package=typed-array-length
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