Advance to stage 4

[mathiasbynens]

Criteria taken from the TC39 process document minus those from previous stages:

• Test262 acceptance tests have been written for mainline usage scenarios, and merged. Tracking at (Add coverage for Promise.allSettled proposal test262#2112).

tc39/test262#2112
tc39/test262#2124

• Two compatible implementations which pass the acceptance tests

https://github.com/tc39/proposal-promise-allSettled#implementations

Bug tickets to track:

• Chrome/V8: https://bugs.chromium.org/p/v8/issues/detail?id=9060
• Edge/Chakra: Implement Promise.allSettled chakra-core/ChakraCore#6056
• Firefox/SpiderMonkey: https://bugzilla.mozilla.org/show_bug.cgi?id=1539694
• Safari/JavaScriptCore: https://bugs.webkit.org/show_bug.cgi?id=197600
• Moddable/XS: Implement Promise.allSettled Moddable-OpenSource/moddable#211

• Significant in-the-field experience with shipping implementations, such as that provided by two independent VMs

https://github.com/tc39/proposal-promise-allSettled#implementations

• A pull request has been sent to https://github.com/tc39/ecma262 with the integrated spec text

tc39/ecma262#1583

• All ECMAScript editors have signed off on the pull request

TODO

[ljharb]

Blocked by #10

[mathiasbynens]

This proposal achieved stage 4 at today’s TC39 meeting, pending tc39/ecma262#1583 being formally approved by the editor group and merged. I’m closing this issue and this repository since there’s nothing left to be done here.