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The Intl.NumberFormat.prototype property represents the prototype object for the Intl.NumberFormat constructor.

Property attributes of Intl.NumberFormat.prototype
Writable no
Enumerable no
Configurable no


See NumberFormat for a description of Intl.NumberFormat instances.

Intl.NumberFormat instances inherit from Intl.NumberFormat.prototype. Modifications to the prototype object are inherited by all Intl.NumberFormat instances.


A reference to Intl.NumberFormat.
Getter; returns a function that formats a number according to the locale and formatting options of this NumberFormat object.


Returns an Array of objects representing the number string in parts that can be used for custom locale-aware formatting.
Returns a new object with properties reflecting the locale and collation options computed during initialization of the object.


Specification Status Comment
ECMAScript Internationalization API 1.0 (ECMA-402)
The definition of 'Intl.NumberFormat.prototype' in that specification.
Standard Initial definition.
ECMAScript Internationalization API 2.0 (ECMA-402)
The definition of 'Intl.NumberFormat.prototype' in that specification.
ECMAScript Internationalization API 4.0 (ECMA-402)
The definition of 'Intl.NumberFormat.prototype' in that specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support24 Yes29111510
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No26 Yes56 ?10 Yes

See also

Document Tags and Contributors

Contributors to this page: fscholz, arai, abroz, Mingun, Sheppy, Norbert
Last updated by: fscholz,