Intl.Locale.prototype.maximize()

The maximize() method of {{jsxref("Intl.Locale")}} instances gets the most likely values for the language, script, and region of this locale based on existing values.

{{InteractiveExample("JavaScript Demo: Intl.Locale.prototype.maximize()")}}

```js interactive-example const english = new Intl.Locale("en"); const korean = new Intl.Locale("ko"); const arabic = new Intl.Locale("ar");

console.log(english.maximize().baseName); // Expected output: "en-Latn-US"

console.log(korean.maximize().baseName); // Expected output: "ko-Kore-KR"

console.log(arabic.maximize().baseName); // Expected output: "ar-Arab-EG"

## Syntax

```js-nolint
maximize()

Parameters#

None.

Return value#

An {{jsxref("Intl.Locale")}} instance whose baseName property returns the result of the Add Likely Subtags algorithm executed against {{jsxref("Intl/Locale/baseName", "locale.baseName")}}.

Description#

Sometimes, it is convenient to be able to identify the most likely locale language identifier subtags based on an incomplete language ID. The Add Likely Subtags algorithm gives us this functionality. For instance, given the language ID "en", the algorithm would return "en-Latn-US", since English can only be written in the Latin script, and is most likely to be used in the United States, as it is the largest English-speaking country in the world. This functionality is provided to JavaScript programmers via the maximize() method. maximize() only affects the main subtags that comprise the language identifier: language, script, and region subtags. Other subtags after the "-u" in the locale identifier are called extension subtags and are not affected by the maximize() method. Examples of these subtags include {{jsxref("Intl/Locale/hourCycle", "hourCycle")}}, {{jsxref("Intl/Locale/calendar", "calendar")}}, and {{jsxref("Intl/Locale/numeric", "numeric")}}.

Examples#

Using maximize#

const myLocale = new Intl.Locale("fr", {
  hourCycle: "h12",
  calendar: "gregory",
});
console.log(myLocale.baseName); // Prints "fr"
console.log(myLocale.toString()); // Prints "fr-u-ca-gregory-hc-h12"
const myLocMaximized = myLocale.maximize();

// Prints "fr-Latn-FR". The "Latn" and "FR" tags are added,
// since French is only written in the Latin script and is most likely to be spoken in France.
console.log(myLocMaximized.baseName);

// Prints "fr-Latn-FR-u-ca-gregory-hc-h12".
// Note that the extension tags (after "-u") remain unchanged.
console.log(myLocMaximized.toString());

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Intl.Locale")}}
• {{jsxref("Intl/Locale/baseName", "baseName")}}
• Likely Subtags in the Unicode locale data markup language spec