The Number.NaN static data property represents Not-A-Number, which is equivalent to NaN. For more information about the behaviors of NaN, see the description for the global property.
The Number.NaN static data property represents Not-A-Number, which is equivalent to NaN. For more information about the behaviors of NaN, see the description for the global property.
The number value NaN.
Property attributes of Number.NaN
| |
|---|---|
| Writable | no |
| Enumerable | no |
| Configurable | no |
Because NaN is a static property of Number, you always use it as Number.NaN, rather than as a property of a number value.
function sanitize(x) { if (isNaN(x)) { return Number.NaN; } return x; }
| Specification |
|---|
| ECMAScript Language Specification # sec-number.nan |
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
NaN |
1 | 12 | 1 | 3 | 1 | 18 | 4 | 10.1 | 1 | 1.0 | 4.4 | 1.0 | 0.10.0 | |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/NaN