Intl.supportedValuesOf()

key

A key string indicating the category of values to be returned. This is one of:

• "calendar": see supported calendar types
• "collation": see supported collation types
• "currency": see supported currency identifiers
• "numberingSystem": see supported numbering system types
• "timeZone": see supported time zone identifiers
• "unit": see supported unit identifiers

A sorted array of unique string values indicating the values supported by the implementation for the given key. The values that could be returned are listed below.

Supported calendar types

Below are all values that are commonly supported by browsers for the calendar key. These values can be used for the calendar option or the caUnicode extension key when creating objects such as Intl.DateTimeFormat, as well as for creating Temporal date objects.

The types below are specified in CLDR but do not have implementations distinct from the above calendars in browsers.

References:

• CLDR Calendar type keys
• UTS 35, Dates
• Islamic calendar types (CLDR design proposal)

Supported collation types

Below are all values that are commonly supported by browsers for the collation key. These values can be used for the collation option or the coUnicode extension key when creating objects such as Intl.Collator.

The types below are specified in CLDR data, but are deprecated, are discouraged from explicit usage, and/or may not be indicated by browsers as supported for various reasons. Avoid using them:

References:

• CLDR Collation type keys
• UTS 35, Collation

Supported currency identifiers

Currency identifiers are three-letter uppercase codes defined in ISO 4217. These values can be used for the currency option when creating objects such as Intl.NumberFormat, as well as for Intl.DisplayNames.prototype.of(). There are over 300 identifiers in common use so we won't list them. For an exhaustive list of possible identifiers, see the Wikipedia article.

References:

• CLDR Currency type keys
• ISO 4217 Currency codes
• UTS 35, Currencies

Supported numbering system types

Below are all values that are commonly supported by browsers for the numberingSystem key. These values can be used for the numberingSystem option or the nuUnicode extension key when creating objects such as Intl.NumberFormat. For the rows with "digit characters", the runtime translates the digits one-by-one without extra actions. The others marked as "algorithmic" need additional algorithms to translate the digits. The higher the Unicode code point is, the newer the numbering system is and the more likely it is unsupported by all browsers.

There are three special values: native, traditio, and finance, whose meanings are locale-dependent, and will be resolved to the right system depending on the locale. Therefore, the resolvedOptions() methods will never return these values, but Intl.Locale.prototype.numberingSystem will (if provided as input).

References:

• CLDR Numbering system type keys
• CLDR Numbering system definitions
• UTS 35, Numbering systems

Supported time zone identifiers

Supported time zone identifiers can be used for the timeZone option when creating objects such as Intl.DateTimeFormat, as well as for creating Temporal date objects. There are over 400 identifiers in common use so we won't list them. For an exhaustive list of possible identifiers, see the Wikipedia article or the IANA time zone database.

As you browse the list, note that the standardization of Temporal requires browsers to always return the primary identifier in the IANA database, which may change over time. See time zones and offsets for more information. For example, the returned array should contain "Asia/Kolkata" instead of "Asia/Calcutta" because the latter is an alias of the former and they both correspond to India; however, it should contain both "Africa/Abidjan" and "Atlantic/Reykjavik" because they are in different countries, despite the latter also being an alias of the former.

References:

• IANA Time Zone Database
• UTS 35, Time Zone Identifiers

Supported unit identifiers

Below are all values that are commonly supported by browsers for the unit key. These values can be used for the unit option when creating objects such as Intl.NumberFormat. This list is a subset of the CLDR explicitly sanctioned by the ECMA-402 specification, so all implementations should be consistent.

• acre
• bit
• byte
• celsius
• centimeter
• day
• degree
• fahrenheit
• fluid-ounce
• foot
• gallon
• gigabit
• gigabyte
• gram
• hectare
• hour
• inch
• kilobit
• kilobyte
• kilogram
• kilometer
• liter
• megabit
• megabyte
• meter
• microsecond
• mile
• mile-scandinavian
• milliliter
• millimeter
• millisecond
• minute
• month
• nanosecond
• ounce
• percent
• petabyte
• pound
• second
• stone
• terabit
• terabyte
• week
• yard
• year

When specifying units, you can also combine two units with the "-per-" separator. For example, meter-per-second or liter-per-megabyte.

References:

• ECMA-402 sanctioned single units
• CLDR Unit validity data
• UTS 35, Unit identifiers

RangeError

Thrown if an unsupported key was passed as a parameter.

You can check that the method is supported by comparing to undefined:

if (typeof Intl.supportedValuesOf !== "undefined") { // method is supported } 

To get the supported values for calendar you call the method with the key "calendar". You can then iterate through the returned array as shown below:

Intl.supportedValuesOf("calendar").forEach((calendar) => { // "buddhist", "chinese", "coptic", "dangi", etc. }); 

The other values are all obtained in the same way:

Intl.supportedValuesOf("collation").forEach((collation) => { // "compat", "dict", "emoji", etc. }); Intl.supportedValuesOf("currency").forEach((currency) => { // "ADP", "AED", "AFA", "AFN", "ALK", "ALL", "AMD", etc. }); Intl.supportedValuesOf("numberingSystem").forEach((numberingSystem) => { // "adlm", "ahom", "arab", "arabext", "bali", etc. }); Intl.supportedValuesOf("timeZone").forEach((timeZone) => { // "Africa/Abidjan", "Africa/Accra", "Africa/Addis_Ababa", "Africa/Algiers", etc. }); Intl.supportedValuesOf("unit").forEach((unit) => { // "acre", "bit", "byte", "celsius", "centimeter", etc. }); 

• Polyfill of Intl.supportedValuesOf in FormatJS
• Intl