Meta: The Road to Stage 4

[rbuckton]

From the TC39 Process document:

• [x] Test262 acceptance tests have been written for mainline usage scenarios
  • [x] and merged.
• [x] Two compatible implementations which pass the acceptance tests:
  • [x] V8 (tracking bug) — Shipping as of 9.0.259, tested in Chrome Canary 91:
  • [x] SpiderMonkey (tracking bug) — Shipping as of Firefox Nightly 88, Tested in 88.0a1:
  • [x] JavaScriptCore (tracking bug) — Shipping as of https://github.com/WebKit/WebKit/commit/7e63c11fb1f6b2f5964c460a656144ee7553e604
  • [x] Engine262 (pull request (prior to d flag, merged), pull request (for 'd' flag))
• [x] A pull request has been sent to tc39/ecma262 with the integrated spec text.
• [x] The ECMAScript editor has signed off on the pull request.

[leobalter]

@rbuckton do you have plans to bring the tests soon? I'm looking forward to review them!

[rbuckton]

I've created a PR for the test262 tests: https://github.com/tc39/test262/pull/2309

[rbuckton]

This is now shipping behind a flag in V8, per the explainer:

• V8 v7.8, behind the --harmony-regexp-match-indices flag (tracking bug)

[rbuckton]

This was just added to Engine262: https://github.com/engine262/engine262/pull/99

[rbuckton]

@msaboff is there anything I can add to this list regarding JSC's implementation experience?

[msaboff]

@msaboff is there anything I can add to this list regarding JSC's implementation experience?

JSC supports the latest draft and will be landing a compliant patch soon.

[Constellation]

@msaboff landed the patch https://github.com/WebKit/WebKit/commit/7e63c11fb1f6b2f5964c460a656144ee7553e604

[rbuckton]

@msaboff is there a version number associated with this I can include in a slide deck?

[msaboff]

@msaboff is there a version number associated with this I can include in a slide deck?

It is in the nightly build. I missed the cutoff for Safari Technology Preview 121, but will be in next STP 122.

[jandem]

This has landed in Firefox Nightly too and (if all goes well) will be in Firefox 88.

https://bugzilla.mozilla.org/show_bug.cgi?id=1519483

[andylima]

It's already in Chrome 90 — https://v8.dev/blog/v8-release-90

[msaboff]

It is in Safari Tech Preview 122.