# is-nan-x

> ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

Latest version **2.1.1** (published 2019-08-28) · MIT license · 0 weekly downloads

## Install

```sh
npm install is-nan-x
pnpm add is-nan-x
yarn add is-nan-x
bun add is-nan-x
```

## Health

**Score 20/100 (F)** — status: abandoned.

Positive: esm support; no vulnerabilities.

Warnings: low downloads; no types.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 2.1.1 |
| Published | 2019-08-28 |
| First published | 2017-09-01 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | ESM + CommonJS |
| Node | >=8.11.4 |
| Dependencies | 0 |
| Unpacked size | 30.3 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 0 |
| Author | Graham Fairweather |
| Maintainers | xotic750 |
| Keywords | number, isNaN, module, javascript, nodejs, browser |

## Links

- npm: https://www.npmjs.com/package/is-nan-x
- Repository: https://github.com/Xotic750/is-nan-x
- Issues: https://github.com/Xotic750/is-nan-x/issues
- npm.io page: https://npm.io/package/is-nan-x

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## Recent versions

- 2.1.1 (latest) — 2019-08-28
- 2.1.0 — 2019-08-14
- 2.0.30 — 2019-07-31
- 2.0.29 — 2019-07-27
- 2.0.28 — 2019-07-27
- 2.0.26 — 2019-07-26
- 2.0.25 — 2019-07-25
- 2.0.24 — 2019-07-24
- 2.0.23 — 2019-07-24
- 2.0.22 — 2019-07-23
- 2.0.21 — 2019-07-22
- 2.0.20 — 2019-07-21
- 2.0.19 — 2019-07-21
- 2.0.18 — 2019-07-19
- 2.0.17 — 2019-07-18
- … 21 more at https://npm.io/package/is-nan-x/versions

## README

<a
  href="https://travis-ci.org/Xotic750/is-nan-x"
  title="Travis status">
<img
  src="https://travis-ci.org/Xotic750/is-nan-x.svg?branch=master"
  alt="Travis status" height="18">
</a>
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  href="https://david-dm.org/Xotic750/is-nan-x"
  title="Dependency status">
<img src="https://david-dm.org/Xotic750/is-nan-x/status.svg"
  alt="Dependency status" height="18"/>
</a>
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  href="https://david-dm.org/Xotic750/is-nan-x?type=dev"
  title="devDependency status">
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  alt="devDependency status" height="18"/>
</a>
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  href="https://badge.fury.io/js/is-nan-x"
  title="npm version">
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  alt="npm version" height="18">
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  title="jsDelivr hits">
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  alt="jsDelivr hits" height="18">
</a>
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  href="https://bettercodehub.com/results/Xotic750/is-nan-x"
  title="bettercodehub score">
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  alt="bettercodehub score" height="18">
</a>
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  href="https://coveralls.io/github/Xotic750/is-nan-x?branch=master"
  title="Coverage Status">
<img src="https://coveralls.io/repos/github/Xotic750/is-nan-x/badge.svg?branch=master"
  alt="Coverage Status" height="18">
</a>

<a name="module_is-nan-x"></a>

## is-nan-x

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

<a name="exp_module_is-nan-x--module.exports"></a>

### `module.exports(value)` ⇒ <code>boolean</code> ⏏

This method determines whether the passed value is NaN and its type is
`Number`. It is a more robust version of the original, global isNaN().

**Kind**: Exported function  
**Returns**: <code>boolean</code> - `true` if the given value is NaN and its type is Number;
otherwise, `false`.

| Param | Type            | Description                     |
| ----- | --------------- | ------------------------------- |
| value | <code>\*</code> | The value to be tested for NaN. |

**Example**

```js
import numberIsNaN from 'is-nan-x';

console.log(numberIsNaN(NaN)); // true
console.log(numberIsNaN(Number.NaN)); // true
console.log(numberIsNaN(0 / 0)); // true

// e.g. these would have been true with global isNaN()
console.log(numberIsNaN('NaN')); // false
console.log(numberIsNaN(undefined)); // false
console.log(numberIsNaN({}); // false
console.log(numberIsNaN('blabla')); // false

// These all return false
console.log(numberIsNaN(true));
console.log(numberIsNaN(null));
console.log(numberIsNaN(37));
console.log(numberIsNaN('37'));
console.log(numberIsNaN('37.37'));
console.log(numberIsNaN(''));
console.log(numberIsNaN(' '));
```

---
_Source: https://npm.io/package/is-nan-x · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._