[Webkit-unassigned] [Bug 241414] New: Add support for Atomics.waitAsync

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=241414

            Bug ID: 241414
           Summary: Add support for Atomics.waitAsync
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: florens at fvsch.com

We at StackBlitz are using Atomics.waitAsync (https://github.com/tc39/proposal-atomics-wait-async, apparently stage 3 and shipped in Chromium) on stackblitz.com to power our Node.js-in-the-browser port (called WebContainers).

Firefox doesn't implement Atomics.waitAsync either, but we were able to implement a polyfill using workers-in-workers, something that is not possible in Safari at this time.

The lack of Atomics.waitAsync in WebKit is one of the things stopping us from offering WebContainers to users of Safari and other WebKit-based browsers at this time. (Others include bug 174931, bug 238442, and possibly more we haven't identified yet.)

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