Intl.DisplayNames() 생성자

const regionNamesInEnglish = new Intl.DisplayNames(["en"], { type: "region" });
const regionNamesInTraditionalChinese = new Intl.DisplayNames(["zh-Hant"], {
  type: "region",
});

console.log(regionNamesInEnglish.of("US"));
// Expected output: "United States"

console.log(regionNamesInTraditionalChinese.of("US"));
// Expected output: "美國"

new Intl.DisplayNames(locales, options)

console.log(new Intl.DisplayNames([], { type: "language" }).of("US"));
// 'us'

const dn = new Intl.DisplayNames("pt", { type: "dateTimeField" });
console.log(dn.of("era")); // 'era'
console.log(dn.of("year")); // 'ano'
console.log(dn.of("month")); // 'mês'
console.log(dn.of("quarter")); // 'trimestre'
console.log(dn.of("weekOfYear")); // 'semana'
console.log(dn.of("weekday")); // 'dia da semana'
console.log(dn.of("dayPeriod")); // 'AM/PM'
console.log(dn.of("day")); // 'dia'
console.log(dn.of("hour")); // 'hora'
console.log(dn.of("minute")); // 'minuto'
console.log(dn.of("second")); // 'segundo'

const dn = new Intl.DisplayNames("en", { type: "calendar" });
console.log(dn.of("roc")); // 'Minguo Calendar'
console.log(dn.of("gregory")); // 'Gregorian Calendar'
console.log(dn.of("chinese")); // 'Chinese Calendar'

// `dialect` 옵션 사용
const dnDialect = new Intl.DisplayNames("en", {
  type: "language",
  languageDisplay: "dialect",
});
console.log(dnDialect.of("en-GB")); // 'British English'

// `standard` 옵션 사용
const dnStd = new Intl.DisplayNames("en", {
  type: "language",
  languageDisplay: "standard",
});
console.log(dnStd.of("en-GB")); // 'English (United Kingdom)'