The Intl.PluralRules.supportedLocalesOf()
method returns an array containing those of the provided locales that are supported in plural formatting without having to fall back to the runtime's default locale.
Syntax
Intl.PluralRules.supportedLocalesOf(locales[, options])
Parameters
locales
- A string with a BCP 47 language tag, or an array of such strings. For the general form of the
locales
argument, see the Intl page. options
-
Optional. An object that may have the following property:
localeMatcher
- The locale matching algorithm to use. Possible values are
lookup
andbest fit
; the default isbest fit
. For information about this option, see the Intl page.
Return value
An array of strings representing a subset of the given locale tags that are supported in plural formatting without having to fall back to the runtime's default locale.
Description
Returns an array with a subset of the language tags provided in locales
. The language tags returned are those for which the runtime supports a locale in plural formatting that the locale matching algorithm used considers a match, so that it wouldn't have to fall back to the default locale.
Examples
Using supportedLocalesOf()
Assuming a runtime that supports Indonesian and German but not Balinese in plural formatting, supportedLocalesOf
returns the Indonesian and German language tags unchanged, even though pinyin
collation is neither relevant to plural formatting nor used with Indonesian, and a specialized German for Indonesia is unlikely to be supported. Note the specification of the lookup
algorithm here — a best fit
matcher might decide that Indonesian is an adequate match for Balinese since most Balinese speakers also understand Indonesian, and therefore return the Balinese language tag as well.
var locales = ['ban', 'id-u-co-pinyin', 'de-ID']; var options = { localeMatcher: 'lookup' }; console.log(Intl.PluralRules.supportedLocalesOf(locales, options).join(', ')); // → "id-u-co-pinyin, de-ID"
Specifications
Specification |
---|
ECMAScript Internationalization API (ECMA-402) The definition of 'Intl.PluralRules.supportedLocalesOf' in that specification. |
Browser compatibility
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
supportedLocalesOf | Chrome Full support 63 | Edge Full support 18 | Firefox Full support 58 | IE No support No | Opera Full support 50 | Safari Full support 13 | WebView Android Full support 63 | Chrome Android Full support 63 | Firefox Android Full support 58 | Opera Android Full support 46 | Safari iOS Full support 13 | Samsung Internet Android Full support 8.0 | nodejs
Full support
10.0.0
|
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.