Intl.Locale.prototype.baseName

The baseName accessor property of Intl.Locale instances returns a substring of this locale's string representation, containing core information about this locale, including the language, script, region, and variants, if available.

Description

baseName returns the language ["-" script] ["-" region] *("-" variant) subsequence of the unicode_language_id grammar. It only includes information explicitly specified in the constructor, either through the locale identifier string or the options object.

The set accessor of baseName is undefined. You cannot change this property directly.

Examples

undefined

Basic example

js
const myLoc = new Intl.Locale("fr-Latn-CA"); // Sets locale to Canadian French
console.log(myLoc.toString()); // "fr-Latn-CA-u-ca-gregory"
console.log(myLoc.baseName); // "fr-Latn-CA"

Example with extension tags in the input string

js
// Sets language to Japanese, region to Japan,
// calendar to Gregorian, hour cycle to 24 hours
const japan = new Intl.Locale("ja-JP-u-ca-gregory-hc-24");
console.log(japan.toString()); // "ja-JP-u-ca-gregory-hc-h24"
console.log(japan.baseName); // "ja-JP"

Example with options that override input string

js
// Input string indicates language as Dutch and region as Belgium,
// but options object overrides the region and sets it to the Netherlands
const dutch = new Intl.Locale("nl-Latn-BE", { region: "NL" });

console.log(dutch.baseName); // "nl-Latn-NL"

Specifications

See also