Add `Intl.supportedValuesOf` enumeration to `lib.*.intl.d.ts` as support in Node.js18, and v8, and various browsers exists

[23RoMax]

lib Update Request

Configuration Check

My compilation target is ES2022 and my lib is "esnext.intl", "es2021.intl", "ESNext","ES2022", "ES2021", "es6".

Missing / Incorrect Definition

The static method Intl.supportedValuesOf is supported by Node.js since v18 release from April. This is missing in the definition of Intl.

Sample Code

Intl.supportedValuesOf("timeZone").forEach(function(timeZone) {
   console.log(timeZone);
});

Documentation Link

Ecmascript - it is listed as a stage3 proposal, but given that it is already implemented in v8 & mentioned in the MDN this seems reasonable.

[23RoMax]

As a temporary solution, I extended the existing type declaration

declare namespace Intl {
  type Key = 'calendar' | 'collation' | 'currency' | 'numberingSystem' | 'timeZone' | 'unit';

  function supportedValuesOf(input: Key): string[];
}

[RyanCavanaugh]

Tagging this help wanted but we'd like to wait until this is shipping in Chrome/Edge before getting a PR for it

[IanVoxSmart]

I've just tried it in Chrome 103.0.5060.134 (Linux) and it's supported.

[peetjvv]

Can confirm it also works on Chrome 106.0.5249.91 and Firefox 105.0.1 in Windows 10.

[karlhorky]

Also available in Node.js LTS (18.18.0):

> Intl.supportedValuesOf('timeZone')
[
  'Africa/Abidjan',
  'Africa/Accra',
  'Africa/Addis_Ababa',
  'Africa/Algiers',
  'Africa/Asmera',
  'Africa/Bamako',
  'Africa/Bangui',
  'Africa/Banjul',
  'Africa/Bissau',
  ... 419 more items
]

[phongphongg]

Any update?

[ConcernedHobbit]

https://caniuse.com/mdn-javascript_builtins_intl_supportedvaluesof

The global support percentage is ~90%, and as Node also supports it I don't see what the blocker for this is.