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.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
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
- E.g. "gregory"
-
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 onundefined
being returned, as future versions may return aString
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
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out
https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
resolvedOptions |
Chrome Full support 24 | Edge Full support 12 | Firefox Full support 29 | IE Full support 11 | Opera Full support 15 | Safari Full support 10 | WebView Android No support No | Chrome Android Full support 26 | Firefox Android Full support 56 | Opera Android ? | Safari iOS Full support 10 | Samsung Internet Android Full support 1.5 | nodejs ? |
computed timeZone |
Chrome Full support 35 | Edge Full support 14 | Firefox Full support 53 | IE No support No | Opera Full support 30 | Safari Full support 10 | WebView Android No support No | Chrome Android Full support 35 | Firefox Android Full support 56 | Opera Android ? | Safari iOS Full support 10 | Samsung Internet Android Full support Yes | nodejs ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown