May 2023 about proposals HOT 22 OPEN

RegExp v flag for Stage 4 (tc39/ecma262#2418, slides) reaches Stage 4

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Source Phase Imports for stage 3 (slides, tc39/proposal-source-phase-imports#36) stays at Stage 2:

• dynamic import changes to a static syntax: import.<phase>("foo") instead of import("foo", { phase: <phase> })
• We will not restrict the imported identifier

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Well-Formed Unicode Strings (String.prototype.{is,to}WellFormed) for stage 4 (slides, tc39/ecma262#3039) reaches Stage 4

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Float16Array for stage 3 (slides, spec) reaches Stage 3

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Array.prototype.group rename for web compatibility (slides) is demoted to Stage 2 due to the change to static methods and accepting iterators, with the expectation that it will come back next meeting for Stage 3 after reviews.

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Decorator Metadata for Stage 3 (slides, pzuraq/ecma262#10) reaches Stage 3 with the above changes

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needs consensus: tc39/ecma262#3052 limit ArrayBuffer size to 2^53 bytes (slides) reaches consensus

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Base64 for Uint8Array for stage 2 (slides, spec) reaches Stage 2

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Symbol Predicates needs stage 3 reviewers; confirm tc39/proposal-symbol-predicates#9 does not reach consensus on throwing, we'll rename the methods to end with "Symbol"

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iterator helpers: should Symbol.iterator fallback be a callable check or an undefined/null check? (slides) reaches consensus on Option 1, so we'll change iterator helpers proposal to check nullish instead of callable.

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iterator helpers: should malformed iterators fail early or fail only when iterated? (slides) gets consensus on Option 3, so iterator helpers will not eagerly validate the next method.

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Not yet, the committee asked this to be presented again later in the meeting, but I don't see it scheduled currently.

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@zloirock it is being presented for stage 3 advancement right now

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Array.fromAsync tc39/proposal-array-from-async#41: avoid double construction of this value (slides) reaches consensus

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Atomics.waitAsync for Stage 4 (tc39/ecma262#3049) reaches Stage 4

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Decorator field/accessor initializer order (tc39/proposal-decorators#508, slides) gains consensus for Option 1, so we'll reverse the run order of initializers to be outermost -> innermost.

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Decorator Metadata for Stage 3 (slides, pzuraq/ecma262#10) has general support for the what was discussed:

• Function.prototype[Symbol.metatdata] will be added
• Only derived classes will lookup the super's metadata object
• Classes without decorators will not have a metadata object

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Intl ZonedDateTimeFormat for stage 1 (slides) reaches Stage 1 with a reduced scope for formatting just ZonedDateTimeFormat in some ergonomic way

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Decorator Metadata for Stage 3 (slides, pzuraq/ecma262#10) has general support for the what was discussed

But without promotion to stage 3?

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Promise.withResolvers for stage 2 (repo, slides) reaches Stage 2

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