Intl.Locale.prototype.variants

Category: JavaScript
Type: Chromium catches up
Status: Proposed (Chrome Proposed)
Intent stage: None

Breaking change: No
Enterprise impact: None
Spec maturity: Published standard
Web Platform Tests: Yes

WPT details: Test262 https://github.com/tc39/test262/tree/main/test/intl402/Locale 'intl402/Locale/constructor-getter-order': 'intl402/Locale/constructor-options-throwing-getters': 'intl402/Locale/constructor-options-variants-invalid': 'intl402/Locale/constructor-options-variants-valid': 'intl402/Locale/getters-grandfathered': 'intl402/Locale/getters-missing': 'intl402/Locale/prototype/variants/name': 'intl402/Locale/prototype/variants/prop-desc':

Summary

Add Intl.Locale.prototype.variants as stated in https://tc39.es/ecma402/#sec-Intl.Locale.prototype.variants and also accept "variants" in option bag in Intl.Locale consturctor as in https://tc39.es/ecma402/#sec-updatelanguageid The changes to ECMA402 is merged in https://github.com/tc39/ecma402/pull/960 and the test code in test262 are merged in in https://github.com/tc39/test262/pull/4474/

Motivation

TC39 already approve for the change so it is now part of ECMA402 spec.

Standards & signals

Specification: https://tc39.es/ecma402/#sec-Intl.Locale.prototype.variants
Firefox: Shipped/Shipping — https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/141
Safari: Shipped/Shipping — Apple said it is already shipped in Safari 26 landing commit in https://github.com/WebKit/WebKit/commit/b8b32fe6a3c5cdaf94eab51e0dfef07620ac170e https://bugs.webkit.org/show_bug.cgi?id=294755
Web developers: Strongly positive

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=test%2Fintl402%2FLocale
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+Intl.Locale.prototype.variants
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=Intl.Locale.prototype.variants
Baseline status: https://webstatus.dev/?q=Intl.Locale.prototype.variants

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