67 lines
2.0 KiB
Markdown
67 lines
2.0 KiB
Markdown
<a href="https://travis-ci.org/Xotic750/is-nan-x"
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title="Travis status">
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<img
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src="https://travis-ci.org/Xotic750/is-nan-x.svg?branch=master"
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alt="Travis status" height="18"/>
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</a>
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<a href="https://david-dm.org/Xotic750/is-nan-x"
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title="Dependency status">
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<img src="https://david-dm.org/Xotic750/is-nan-x.svg"
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alt="Dependency status" height="18"/>
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</a>
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<a href="https://david-dm.org/Xotic750/is-nan-x#info=devDependencies"
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title="devDependency status">
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<img src="https://david-dm.org/Xotic750/is-nan-x/dev-status.svg"
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alt="devDependency status" height="18"/>
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</a>
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<a href="https://badge.fury.io/js/is-nan-x" title="npm version">
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<img src="https://badge.fury.io/js/is-nan-x.svg"
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alt="npm version" height="18"/>
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</a>
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<a name="module_is-nan-x"></a>
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## is-nan-x
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ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
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**Version**: 1.0.1
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**Author**: Xotic750 <Xotic750@gmail.com>
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**License**: [MIT](<https://opensource.org/licenses/MIT>)
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**Copyright**: Xotic750
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<a name="exp_module_is-nan-x--module.exports"></a>
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### `module.exports(value)` ⇒ <code>boolean</code> ⏏
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This method determines whether the passed value is NaN and its type is
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`Number`. It is a more robust version of the original, global isNaN().
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**Kind**: Exported function
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**Returns**: <code>boolean</code> - `true` if the given value is NaN and its type is Number;
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otherwise, `false`.
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| Param | Type | Description |
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| --- | --- | --- |
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| value | <code>\*</code> | The value to be tested for NaN. |
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**Example**
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```js
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var numberIsNaN = require('is-nan-x');
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numberIsNaN(NaN); // true
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numberIsNaN(Number.NaN); // true
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numberIsNaN(0 / 0); // true
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// e.g. these would have been true with global isNaN()
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numberIsNaN('NaN'); // false
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numberIsNaN(undefined); // false
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numberIsNaN({}); // false
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numberIsNaN('blabla'); // false
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// These all return false
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numberIsNaN(true);
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numberIsNaN(null);
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numberIsNaN(37);
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numberIsNaN('37');
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numberIsNaN('37.37');
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numberIsNaN('');
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numberIsNaN(' ');
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```
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