Intl.DisplayNames() constructor

The Intl.DisplayNames() constructor creates Intl.DisplayNames objects that enable the consistent translation of language, region and script display names.

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new Intl.DisplayNames(locales, options)



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 Intl page. The following Unicode extension key is allowed:


The numbering system to be used. Possible values include: "arab", "arabext", "bali", "beng", "deva", "fullwide", "gujr", "guru", "hanidec", "khmr", "knda", "laoo", "latn", "limb", "mlym", "mong", "mymr", "orya", "tamldec", "telu", "thai", "tibt".


An object with some or all of the following properties:


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.


The formatting style to use, the default is "long".

  • "narrow"
  • "short"
  • "long"

The type to use.

  • "calendar"
  • "currency"
  • "dateTimeField"
  • "language"
  • "region"
  • "script"

The languageDisplay it's only usable along with type language, defaults to dialect.

  • "dialect"
  • "standard"

The fallback to use, the default is "code".

  • "code"
  • "none"


Basic usage

In basic use without specifying a locale, a formatted string in the default locale and with default options is returned.

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

Using type dateTimeField

Example using dateTimeField as a type option, will return the localized date time names strings.

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

Using type calendar

Example using calendar as a type option, will return the localized calendar names strings.

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

Using type language with languageDisplay

Example using language as a type with languageDisplay options.

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

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


ECMAScript Internationalization API Specification
# sec-intl-displaynames-constructor

Browser compatibility

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See also