@formatjs/intl-relativetimeformat
Version:
Formats JavaScript dates to relative time strings.
35 lines (34 loc) • 2 kB
JavaScript
import { CanonicalizeLocaleList, CoerceOptionsToObject, GetOption, invariant, } from '@formatjs/ecma402-abstract';
import { ResolveLocale } from '@formatjs/intl-localematcher';
var NUMBERING_SYSTEM_REGEX = /^[a-z0-9]{3,8}(-[a-z0-9]{3,8})*$/i;
export function InitializeRelativeTimeFormat(rtf, locales, options, _a) {
var getInternalSlots = _a.getInternalSlots, availableLocales = _a.availableLocales, relevantExtensionKeys = _a.relevantExtensionKeys, localeData = _a.localeData, getDefaultLocale = _a.getDefaultLocale;
var internalSlots = getInternalSlots(rtf);
internalSlots.initializedRelativeTimeFormat = true;
var requestedLocales = CanonicalizeLocaleList(locales);
var opt = Object.create(null);
var opts = CoerceOptionsToObject(options);
var matcher = GetOption(opts, 'localeMatcher', 'string', ['best fit', 'lookup'], 'best fit');
opt.localeMatcher = matcher;
var numberingSystem = GetOption(opts,
// @ts-expect-error TS option is wack
'numberingSystem', 'string', undefined, undefined);
if (numberingSystem !== undefined) {
if (!NUMBERING_SYSTEM_REGEX.test(numberingSystem)) {
throw new RangeError("Invalid numbering system ".concat(numberingSystem));
}
}
opt.nu = numberingSystem;
var r = ResolveLocale(availableLocales, requestedLocales, opt, relevantExtensionKeys, localeData, getDefaultLocale);
var locale = r.locale, nu = r.nu;
internalSlots.locale = locale;
internalSlots.style = GetOption(opts, 'style', 'string', ['long', 'narrow', 'short'], 'long');
internalSlots.numeric = GetOption(opts, 'numeric', 'string', ['always', 'auto'], 'always');
var fields = localeData[r.dataLocale];
invariant(!!fields, "Missing locale data for ".concat(r.dataLocale));
internalSlots.fields = fields;
internalSlots.numberFormat = new Intl.NumberFormat(locales);
internalSlots.pluralRules = new Intl.PluralRules(locales);
internalSlots.numberingSystem = nu;
return rtf;
}