The Number.NaN property represents Not-A-Number. Equivalent of NaN.
Number.NaN
Try it
You do not have to create a Number object to access this static property (use Number.NaN).
Property attributes of Number.NaN |
|
|---|---|
| Writable | no |
| Enumerable | no |
| Configurable | no |
Examples
Checking whether values are numeric
function sanitize(x) { if (isNaN(x)) { return Number.NaN; } return x; }
Testing against NaN
See Testing against NaN on the NaN page.
Specifications
| Specification |
|---|
| ECMAScript Language Specification # sec-number.nan |
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
NaN |
1
|
12
|
1
|
4
|
3
|
1
|
1
|
18
|
4
|
10.1
|
1
|
1.0
|
1.0
|
0.10.0
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/NaN
