The Intl.RelativeTimeFormat.supportedLocalesOf()
static method returns an array containing those of the provided locales that are supported in relative time formatting without having to fall back to the runtime's default locale.
The Intl.RelativeTimeFormat.supportedLocalesOf()
static method returns an array containing those of the provided locales that are supported in relative time formatting without having to fall back to the runtime's default locale.
Intl.RelativeTimeFormat.supportedLocalesOf(locales) Intl.RelativeTimeFormat.supportedLocalesOf(locales, options)
locales
A string with a BCP 47 language tag, or an array of such strings. For the general form and interpretation of the locales
argument, see the parameter description on the Intl
main page.
options
Optional
An object that may have the following property:
localeMatcher
The locale matching algorithm to use. Possible values are "lookup"
and "best fit"
; the default is "best fit"
. For information about this option, see the Intl page.
An array of strings representing a subset of the given locale tags that are supported in relative time formatting without having to fall back to the runtime's default locale.
Assuming a runtime that supports Indonesian and German but not Balinese in relative time formatting, supportedLocalesOf
returns the Indonesian and German language tags unchanged, even though pinyin
collation is neither relevant to relative time 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.
const locales = ["ban", "id-u-co-pinyin", "de-ID"]; const options = { localeMatcher: "lookup" }; console.log(Intl.RelativeTimeFormat.supportedLocalesOf(locales, options)); // ["id-u-co-pinyin", "de-ID"]
Specification |
---|
ECMAScript Internationalization API Specification # sec-Intl.RelativeTimeFormat.supportedLocalesOf |
Desktop | Mobile | Server | ||||||||||||
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Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
supportedLocalesOf |
71 | 79 | 65 | 58 | 14 | 71 | 65 | 50 | 14 | 10.0 | 71 | 1.8 | 13.0.012.0.0Before version 13.0.0, only the locale data foren-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data. |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/supportedLocalesOf