Bug 265233 – Intl.DisplayNames().of() API always returns "short" region name, ignoring "style" option value

• Component: JavaScriptCore
• Status: RESOLVED MOVED

[Jakub Żmudziński]

Created attachment 468721 [details]
API call in console

### Steps to reproduce the problem:

1.
const regionNames = new Intl.DisplayNames(["en"], {
  locale: "en",
  type: "region",
});

console.log(regionNames.of("HK"));
// logs "Hong Kong" instead of "Hong Kong SAR China"

2.
const longRegionNames = new Intl.DisplayNames(["en"], {
  locale: "en",
  type: "region",
  style: "long",
});
console.log(longRegionNames.of("HK"));
// logs "Hong Kong" instead of "Hong Kong SAR China"

### Problem Description:

According to the specification https://tc39.es/ecma402/#sec-intl-displaynames-constructor, Intl.displayNames().of() API should return "long" form of the region names by default.

In the current version of Safari, this API always returns the "short" version, even when "long" value is passed to "style" option.

Expected long form according to ICU module data - https://github.com/unicode-org/icu/blob/release-74-1/icu4c/source/data/region/en.txt#L138

Additional Comments:
There is no such issue on Node.js or Firefox. It is also present on Chrome browser - https://bugs.chromium.org/p/chromium/issues/detail?id=1504455.

[Karl Dubost]

I don't know how the table is constructed.
but that doesn't seem to be in WebKit. 

https://searchfox.org/wubkat/search?q=Hong+Kong&path=&case=false&regexp=false

[Karl Dubost]

Jake, Thanks for reporting. 
This is currently not controlled by the WebKit project. 
But it is tracked internally and being discussed inside Apple.

[Radar WebKit Bug Importer]

<rdar://problem/118919063>