@formatjs/intl-localematcher/lib/abstract/LookupSupportedLocales.js

Intl.LocaleMatcher ponyfill

import { BestAvailableLocale } from './BestAvailableLocale';
import { UNICODE_EXTENSION_SEQUENCE_REGEX } from './utils';
/**
 * https://tc39.es/ecma402/#sec-lookupsupportedlocales
 * @param availableLocales
 * @param requestedLocales
 */
export function LookupSupportedLocales(availableLocales, requestedLocales) {
    var subset = [];
    for (var _i = 0, requestedLocales_1 = requestedLocales; _i < requestedLocales_1.length; _i++) {
        var locale = requestedLocales_1[_i];
        var noExtensionLocale = locale.replace(UNICODE_EXTENSION_SEQUENCE_REGEX, '');
        var availableLocale = BestAvailableLocale(availableLocales, noExtensionLocale);
        if (availableLocale) {
            subset.push(availableLocale);
        }
    }
    return subset;
}