https://github.com/es-shims/is-nan

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
https://github.com/es-shims/is-nan

ecmascript isnan javascript nan number polyfill shim

Last synced: about 2 months ago
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ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

• Host: GitHub
• URL: https://github.com/es-shims/is-nan
• Owner: es-shims
• License: mit
• Created: 2014-01-20T07:56:04.000Z (over 10 years ago)
• Default Branch: main
• Last Pushed: 2022-11-01T23:46:48.000Z (almost 2 years ago)
• Last Synced: 2024-07-18T07:47:52.840Z (2 months ago)
• Topics: ecmascript, isnan, javascript, nan, number, polyfill, shim
• Language: JavaScript
• Homepage: https://262.ecma-international.org/6.0/#sec-number.isnan
• Size: 112 KB
• Stars: 12
• Watchers: 5
• Forks: 5
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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README

        
# is-nan [![Version Badge][2]][1]

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ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](https://262.ecma-international.org/6.0/#sec-number.isnan).

## Example

```js

Number.isNaN = require('is-nan');

var assert = require('assert');

assert.notOk(Number.isNaN(undefined));

assert.notOk(Number.isNaN(null));

assert.notOk(Number.isNaN(false));

assert.notOk(Number.isNaN(true));

assert.notOk(Number.isNaN(0));

assert.notOk(Number.isNaN(42));

assert.notOk(Number.isNaN(Infinity));

assert.notOk(Number.isNaN(-Infinity));

assert.notOk(Number.isNaN('foo'));

assert.notOk(Number.isNaN(function () {}));

assert.notOk(Number.isNaN([]));

assert.notOk(Number.isNaN({}));

assert.ok(Number.isNaN(NaN));

```

## Tests

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

[1]: https://npmjs.org/package/is-nan

[2]: https://versionbadg.es/es-shims/is-nan.svg

[5]: https://david-dm.org/es-shims/is-nan.svg

[6]: https://david-dm.org/es-shims/is-nan

[7]: https://david-dm.org/es-shims/is-nan/dev-status.svg

[8]: https://david-dm.org/es-shims/is-nan#info=devDependencies

[11]: https://nodei.co/npm/is-nan.png?downloads=true&stars=true

[license-image]: https://img.shields.io/npm/l/is-nan.svg

[license-url]: LICENSE

[downloads-image]: https://img.shields.io/npm/dm/is-nan.svg

[downloads-url]: https://npm-stat.com/charts.html?package=is-nan

[codecov-image]: https://codecov.io/gh/es-shims/is-nan/branch/main/graphs/badge.svg

[codecov-url]: https://app.codecov.io/gh/es-shims/is-nan/

[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/is-nan

[actions-url]: https://github.com/es-shims/is-nan/actions