[Webkit-unassigned] [Bug 209775] New: Intl.ListFormat missing in WebKit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209775

            Bug ID: 209775
           Summary: Intl.ListFormat 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.ListFormat is at Stage 3 in TC39; it is on track to reach Stage 4 in the first half of this year, and the other major browser engines (V8 and SpiderMonkey) have had it ready for some time.

As usage of Intl.ListFormat 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.ListFormat 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.ListFormat.  Implementing Intl.ListFormat 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-list-format

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