[Webkit-unassigned] [Bug 209779] New: Intl.DisplayNames missing in WebKit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209779

            Bug ID: 209779
           Summary: Intl.DisplayNames missing in WebKit
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sffc at chromium.org

Intl.DisplayNames is at Stage 3 in TC39; it is on track to reach Stage 4 in 2020.  V8 has had it ready to ship for some time, and SpiderMonkey plans to implement it soon.

As usage of Intl.DisplayNames increases throughout the ecosystem, WebKit users will be left behind with legacy polyfills, leading to poorer performance relative to other browsers.  At Google, we are currently weighing our options for calling Intl.DisplayNames in supported environments in order to give users better performance and smaller download sizes.

ICU4C exposes C and C++ APIs that can be used to implement Intl.DisplayNames.  Implementing Intl.DisplayNames is largely a matter of adding the glue between JavaScript and ICU4C, as WebKit already does for other Intl types.

Proposal repo: https://github.com/tc39/proposal-intl-displaynames

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