# 96th meeting of TC39

- TCQ: https://tcq.app/meeting/Nh-4
- Agenda: https://github.com/tc39/agendas/blob/main/2023/05.md
- Reflector: https://github.com/tc39/Reflector/issues/470

## Agenda key

When applicable, use these emoji as a prefix to the agenda item topic.

| Emoji | Meaning |
| :---: | :----: |
| 🔒 | schedule constraints apply to this agenda item |
| ⌛️ | late addition for stage advancement and/or schedule prioritization |
| 🔁 | continuation of a previous agenda item |

## Day 1 ([notes](https://mths.be/tc39day1))

<details>

<summary>10:00 to 15:00 CDT (UTC -5) on Monday</summary>

### 10:00-12:00

- Opening & Welcome (Ujjwal)
- Volunteers for note-taking
- Introduction of Attendees
- Adoption of the agenda
- Approval of the minutes from last meeting
- Next meeting host and logistics
- Secretary's Report ([slides](https://github.com/tc39/agendas/blob/main/2023/tc39-2023-002.pdf)) (15m, Istvan Sebestyen)
- Introduction (10m, Samina Husain)
- ECMA262 Status Updates (15m)
- ECMA402 Status Updates (15m, Ujjwal Sharma)
- ECMA404 Status Updates (15m, Chip Morningstar)
- Test262 Status Updates (15m)
- Updates from the CoC Committee (15m)
- TC39 Public Calendar (10m, Chris de Almeida)
- Needs consensus: #3052 limit ArrayBuffer size to 2^53 bytes (8m, Michael Ficarra)
- 🔒 `Array.fromAsync` #41: avoid double construction of this value (15m, Michael Ficarra, J. S. Choi)
- Well-Formed Unicode Strings for Stage 4 (10m, Michael Ficarra)
- `Atomics.waitAsync` for Stage 4 (15m, Shu-yu Guo)
- Base64 for Uint8Array for Stage 2 (30m, Kevin Gibbons)
- 🔒 Symbol Predicates (15m, Jordan Harband)

### lunch (60 minutes)

### 13:00-15:00

- 🔒 Module Harmony: interaction semantics of the different proposals (60m, Nicolò Ribaudo)
- 🔒 Source Phase Imports for Stage 3 (45m, Luca Casonato, Guy Bedford)

</details>

## Day 2 ([notes](https://mths.be/tc39day2))

<details>

<summary>10:00 to 15:00 CDT (UTC -5) on Tuesday</summary>

### 10:00-12:00

- 🔒 RegExp v flag for Stage 4 (15m, Mathias Bynens, Markus Scherer)
- Process: Add Implementation Status to Proposal Pages (30m, Michael Saboff)
- 🔒 Decorator field/accessor initializer order (40m, Chris Hewell Garrett)
- 🔒 Decorator Metadata for Stage 3 (30m, Chris Hewell Garrett)

### lunch (60 minutes)

### 13:00-15:00

- 🔒 Iterator Helpers: should Symbol.iterator fallback be a callable check or an undefined/null check? (30m, Michael Ficarra)
- 🔒 Iterator helpers: should malformed iterators fail early or fail only when iterated? (40m, Michael Ficarra)
- 🔒 Array.prototype.group rename for web compatibility (30m, Daniel Ehrenberg)
- Float16Array for Stage 3 (15m, Kevin Gibbons)
- Source maps: Should TC39 standardize and improve them? (30m, Daniel Ehrenberg)

</details>

## Day 3 ([notes](https://mths.be/tc39day3))

<details>

<summary>10:00 to 15:00 CDT (UTC -5) on Wednesday</summary>

### 10:00-12:00 (10m overflow)

- 🔒 ES2023 plenary vote (10m, Rob Palmer)
- 🔒 Intl.ZonedDateTimeFormat for Stage 1 (30m, Frank Yung-Fong Tang)
- 🔒 AsyncContext Stage 2 Updates (45m, Chengzhong Wu, Justin Ridgewell)
- Intl.DurationFormat Stage 3 Update (45m, Ujjwal Sharma)

### lunch (60 minutes)

### 13:00-15:00

- 🔒 Temporal updates (20m, Philip Chimento)
- 🔒 Time Zone Canonicalization for Stage 2 (30m, Justin Grant, Richard Gibson)
- 🔒 Promise.withResolvers for Stage 2 (30m, Peter Klecha)
- 🔁🔒 Continuation: Source Phase Imports for Stage 3 (40m, Luca Casonato, Guy Bedford)

</details>

## Day 4 ([notes](https://mths.be/tc39day4))

<details open>

<summary>10:00 to 15:00 CDT (UTC -5) on Thursday</summary>

### 10:00-12:00

- ⌛️ Async iterator Stage 2 feedback needed on design/tradeoffs (45m, Kevin Gibbons)
- 🔁 Continuation: Promise.withResolvers - call for stage 3 reviewers (5m, Chris de Almeida)
- Incubator Chartering: Call for helpers (10m, Shu-yu Guo)
- 🔁 Continuation: Source maps: Should TC39 standardize and improve them? (30m, Daniel Ehrenberg)
- 🔁 Continuation: `Array.prototype.group` rename for web compatibility (15m, Jordan Harband)
- TG3 Status (impromptu discussion) (15m, Chris de Almeida)

### lunch (60 minutes)

### 13:00-15:00

</details>

***

## Overflow

### From agenda

### Timebox overrun

## Schedule constraints

- Mark S. Miller (MM, Agoric) will be absent Thursday, May 18.
- Kris Kowal (KKL, Agoric) will be absent Thursday, May 18 and would like to be present for *Source Phase Imports* and any other *Module Harmony* topics.
- Markus Scherer, Mark Davis, Shane Carr, and Mathias Bynens would like to be present for the RegExp `v` flag agenda item, and are available on May 16th from 10:00 until 11:30 TZ (America/Chicago).
- Nicolò Ribaudo is only available on Monday and Wednesday (but Monday is better), and would like to be present for all the topics related to modules.
- Luca Casonato is only available on Monday and Wednesday (but Monday is better), and would like to be present for all the topics related to modules.
- J. S. Choi (JSC, Indiana University) will be absent on Tuesday, May 16 (all day), Wednesday, May 17 (starting at 2 pm America/Chicago), and Thursday, May 18 (all day).
- Ron Buckton (RBN, Microsoft) will be absent the afternoon of Tuesday, May 16 (starting at 2pm \[America/Chicago]) and would like to be present for Decorator Metadata and Decorator field/accessor initializer order.
- Michael Saboff (MLS, Apple) will be absent the morning of Monday, May 15 and would like to be present for the RegExp `v` flag agenda item.
- The Module Harmony interaction semantics presentation should precede the Source Phase Imports presentation.
- Chris Hewell Garrett (CHG, Bitski) will be absent Thursday, May 18th and would like to present *Decorator Metadata for Stage 3* and *Decorator field/accessor initializer order*
- Chengzhong Wu (CZW, Alibaba) is attending from Hangzhou, preference for the Async Contexts topic being discussed at the first two hours of the meeting, any of the days.
- Frank Yung-Fong Tang (FYT) can only present on the morning of Wednesday, May 17.
- ~~Jesse Alama (JMN) can present only on Thursday, May 18.~~
- Jordan Harband will be absent the first hour on Tuesday and Thursday mornings, and would like to be present for Symbol Predicates (presenter), Iterator Helpers, Array group, Decorator Metadata, Promise withResolvers, Source Phase Imports, and Decorator field/accessor initializer order
- Justin Grant can attend any time except: Tue May 16 1-3, Wed May 17 10:30-11:45, and Thu May 18 1:30-3. I'm presenting the Time Zone Canonicalization proposal so I must attend that one, ideally after 12:00 but I can be flexible. I'd also like to attend the Temporal Update, Intl.ZonedDateTimeFormat, and Source Maps presentations.

<style>summary { font-weight: bold; }</style