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 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

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
prototypeChrome Full support 24Edge Full support YesFirefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android Full support YesChrome Android Full support 26Firefox Android Full support 56Opera Android ? Safari iOS Full support 10Samsung Internet Android Full support Yesnodejs ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

Contributors to this page: battaglr, mdnwebdocs-bot, fscholz, arai, abroz, Mingun, Sheppy, Norbert
Last updated by: battaglr,