Jan 2023

[jridgewell]

https://github.com/tc39/agendas/blob/main/2023/01.md

[jridgewell]

_Prototype pollution mitigation / Symbol.proto for Stage 1 (slides)_ reaches Stage 1

[jridgewell]

Symbol as WeakMap key for Stage 4 (spec) reaches Stage 4

[jridgewell]

Change Array by copy for Stage 4 (spec) reaches Stage 4

[jridgewell]

_Intl.NumberFormat V3 for Stage 4 (spec, slides)_ reaches Stage 4

[jridgewell]

Intl.DurationFormat Stage 3 update (Slides TBW) has consensus

[jridgewell]

Explicit Resource Management Stage 3 update (slides, spec) gets consensus on:

• Ban await as Identifier in using
• Ban using in top level of eval

[jridgewell]

Discuss SuppressedError argument overlap: error and cause (issue) gets consensus to remove cause from a SuppressedError

[jridgewell]

Intl Locale Info API Stage 3 update ([Slides](https://docs.google.com/presentation/d/1L-IRdBeLaOrnj-EFmUWxB_ALe9TMvzy4IajuWTg1E), spec) got consensus on things but the conclusion notes aren't written yet…

[ehoogeveen-medweb]

Looks like they chose to add get prefixes: https://github.com/tc39/proposal-intl-locale-info/pull/67 has been merged.

[jridgewell]

Parallel async iterators via a tweak to iterator helpers (slides, proposal) reaches consensus:

• Sync iterators remain at Stage 3
• Async iterators are split and relegated to Stage 2 to discuss parallelism

[jridgewell]

Async Contexts for Stage 1 (slides) reaches Stage 1

[jridgewell]

ArrayBuffer transfer for Stage 3 (slides, spec) reaches Stage 3

[jridgewell]

Intl era and monthCode for Stage 2 (slides, spec) reaches Stage 2

[jridgewell]

Temporal Stage 3 update and normative PRs (slides, spec) got consensus on everything except https://github.com/tc39/proposal-temporal/pull/2479

[jridgewell]

Symbol Predicates for stage 2 reaches Stage 2 with static methods

[jridgewell]

_Async Explicit Resource Management for Stage 3? (slides, spec)_ reaches Stage 3, but the using await and async using syntax discussion is still ongoing (and will be resolved by the next meeting)

[ljharb]

in other words, it's not at stage 3 yet, but it will become so once the one outstanding issue is resolved.

[jridgewell]

getIntrinsic, with an iterator for stage 2 remains at Stage 1, concerns about memory problems being pushed into the engine

[jridgewell]

_Problems with import assertions for module types and a possible general solution + downgrade to Stage 2 (HTML issue, slides, slides for continuation)_ relegates Import Assertions to Stage 2, but we're relaxing the host evaluation restriction. We'll reconsider syntax and semantics to solve the Web's usecase.

[jridgewell]

Decorator context.access object API (issue) gets consensus on both points

[jridgewell]

Decorators and export Ordering (issue, slides) achieves consensus on:

• Both valid before and after the export keyword, but exclusively before or after
• toString will not include decorators before, it's cut off at the export keyword

[zloirock]

What about JSON discussion?

[jridgewell]

_JSON.parse source text access Stage 3 update (slides, spec)_ got consensus to merge #35 and #39, expect to advance next meeting.

[trusktr]

• Both valid before and after the export keyword, but exclusively before or after

Does this mean we can no longer add export decorators in future extensions?

That seems like a sad choice?