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The Number.NaN property represents Not-A-Number. Equivalent of NaN.

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

Specifications

Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.1.
ECMAScript 5.1 (ECMA-262)
The definition of 'Number.NaN' in that specification.
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Number.NaN' in that specification.
Standard  
ECMAScript Latest Draft (ECMA-262)
The definition of 'Number.NaN' in that specification.
Draft  

Browser compatibility

FeatureChromeFirefoxEdgeInternet ExplorerOperaSafari
Basic Support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)

See also

  • The global NaN object.
  • The Number object it belongs to.

Document Tags and Contributors

 Last updated by: fscholz,