Intl.DateTimeFormat.prototype.resolvedOptions()

The Intl.DateTimeFormat.prototype.resolvedOptions() method returns a new object with properties reflecting the locale and date and time formatting options computed during initialization of this DateTimeFormat object.

Syntax

dateTimeFormat.resolvedOptions()

Return value

A new object with properties reflecting the locale and date and time formatting options computed during the initialization of the given DateTimeFormat object.

Description

The resulting object has the following properties:

locale
The BCP 47 language tag for the locale actually used. If any Unicode extension values were requested in the input BCP 47 language tag that led to this locale, the key-value pairs that were requested and are supported for this locale are included in locale.
calendar
numberingSystem
The values requested using the Unicode extension keys "ca" and "nu" or filled in as default values.
timeZone
The value provided for this property in the options argument; undefined (representing the runtime's default time zone) if none was provided. Warning: Applications should not rely on undefined being returned, as future versions may return a String value identifying the runtime’s default time zone instead.
hour12
The value provided for this property in the options argument or filled in as a default.
weekday
era
year
month
day
hour
minute
second
timeZoneName
The values resulting from format matching between the corresponding properties in the options argument and the available combinations and representations for date-time formatting in the selected locale. Some of these properties may not be present, indicating that the corresponding components will not be represented in formatted output.

Examples

Using the resolvedOptions method

var germanFakeRegion = new Intl.DateTimeFormat('de-XX', { timeZone: 'UTC' });
var usedOptions = germanFakeRegion.resolvedOptions();

usedOptions.locale;          // "de"
usedOptions.calendar;        // "gregory"
usedOptions.numberingSystem; // "latn"
usedOptions.timeZone;        // "UTC"
usedOptions.month;           // "numeric"

Specifications

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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support241229111510
computed timeZone351453 No3010
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support No26 Yes56 No ?10
computed timeZone ? ? ?56 No ?10

See also

Document Tags and Contributors

 Last updated by: maboa,