Package Exports
- is-nan-x
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Readme
is-nan-x
ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
Version: 1.0.0
Author: Xotic750 Xotic750@gmail.com
License: MIT
Copyright: Xotic750
module.exports(value) ⇒ boolean ⏏
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: boolean - true if the given value is NaN and its type is Number;
otherwise, false.
| Param | Type | Description |
|---|---|---|
| value | * |
The value to be tested for NaN. |
Example
var numberIsNaN = require('is-nan-x');
numberIsNaN(NaN); // true
numberIsNaN(Number.NaN); // true
numberIsNaN(0 / 0); // true
// e.g. these would have been true with global isNaN()
numberIsNaN('NaN'); // false
numberIsNaN(undefined); // false
numberIsNaN({}); // false
numberIsNaN('blabla'); // false
// These all return false
numberIsNaN(true);
numberIsNaN(null);
numberIsNaN(37);
numberIsNaN('37');
numberIsNaN('37.37');
numberIsNaN('');
numberIsNaN(' ');