[Webkit-unassigned] [Bug 209776] New: Intl.DateTimeFormat dateStyle/timeStyle missing in WebKit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209776

            Bug ID: 209776
           Summary: Intl.DateTimeFormat dateStyle/timeStyle 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

The dateStyle/timeStyle options for Intl.DateTimeFormat are at Stage 3 in TC39; the proposal 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 these features of Intl.DateTimeFormat increases throughout the ecosystem, WebKit users will be left behind with legacy polyfills, leading to broken web sites and/or poorer performance relative to other browsers.  At Google, we are currently weighing our options for calling these features of Intl.DateTimeFormat 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 dateStyle/timeStyle.  Implementing dateStyle/timeStyle 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-datetime-style

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