mozilla
Your Search Results

    Intl.NumberFormat.supportedLocalesOf()

    Summary

    The Intl.NumberFormat.supportedLocalesOf() method returns an array containing those of the provided locales that are supported in number formatting without having to fall back to the runtime's default locale.

    Syntax

    Intl.NumberFormat.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" and "best fit"; the default is "best fit". For information about this option, see the Intl page.

    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 number formatting that the locale matching algorithm used considers a match, so that it wouldn't have to fall back to the default locale.

    Examples

    Example: Using supportedLocalesOf

    Assuming a runtime that supports Indonesian and German but not Balinese in number formatting, supportedLocalesOf returns the Indonesian and German language tags unchanged, even though pinyin collation is neither relevant to number 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.NumberFormat.supportedLocalesOf(locales, options).join(', '));
    // → "id-u-co-pinyin, de-ID"
    

    Specifications

    Specification Status Comment
    ECMAScript Internationalization API 1.0 (ECMA-402)
    The definition of 'Intl.NumberFormat.supportedLocalesOf' in that specification.
    Standard Initial definition.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
    Basic support 24 29 (29) 11 15 Not supported
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
    Basic support Not supported 26 Not supported
    bug 864843
    Not supported Not supported Not supported

    See also

    Document Tags and Contributors

    Contributors to this page: Sheppy, fscholz, Norbert, Mingun
    Last updated by: Mingun,