Intl.DisplayNames.prototype.resolvedOptions()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

The resolvedOptions() method of Intl.DisplayNames instances returns a new object with properties reflecting the options computed during initialization of this DisplayNames object.

Syntax

resolvedOptions()

Parameters

None.

Return value

A new object with properties reflecting the options computed during the initialization of this DisplayNames object. The object has the following properties, in the order they are listed:

locale: The BCP 47 language tag for the locale actually used, determined by the locale negotiation process. No Unicode extension key will be included in the output.
style: The value provided for this property in the options argument, with default filled in as needed. It is either "narrow", "short", or "long". The default is "long".
type: The value provided for this property in the options argument. It is either "language", "region", "script", "currency", "calendar", or "dateTimeField". It is required so there is no default.
fallback: The value provided for this property in the options argument. It is either "code" or "none". The default is "code".
languageDisplay: The value provided for this property in the options argument. It is either "dialect" or "standard". The default is "dialect".

Examples

Using resolvedOptions

const displayNames = new Intl.DisplayNames(["de-DE"], { type: "region" });

const usedOptions = displayNames.resolvedOptions();
console.log(usedOptions.locale); // "de-DE"
console.log(usedOptions.style); // "long"
console.log(usedOptions.type); // "region"
console.log(usedOptions.fallback); // "code"

const displayNames = new Intl.DisplayNames("en", {
  type: "language",
  languageDisplay: "standard",
});

const usedOptions = displayNames.resolvedOptions();
console.log(usedOptions.type); // "language"
console.log(usedOptions.languageDisplay); // "standard"

Specifications

Specification
ECMAScript® 2026 Internationalization API Specification # sec-Intl.DisplayNames.prototype.resolvedOptions