# 86th meeting of TC39

- TCQ: https://tcq.app/meeting/s33V
- Hallway track: https://hubs.mozilla.com/oAAvRHu/tc39
- Agenda: https://github.com/tc39/agendas/blob/master/2021/10.md
- Reflector: https://github.com/tc39/Reflector/issues/396

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

<details>

<summary>10:00 to 15:00 BST (UTC+1) on 25 October, 2021</summary>

### 10:00-12:00

- Opening & Welcome - Aki
- Volunteers for note-taking
- Adoption of the agenda
- Approval of the minutes from last meeting
- 5m | Plenary Scheduling for 2022 | Rob
- Secretary's Report
- ECMA262 Status Updates
- ECMA402 Status Updates
- ECMA404 Status Updates
- Test262 Status Updates
- Updates from the CoC Committee
- 5m | Ecma Recognition Awards | Yulia Startsev
- 20m | `TypedArray` prototype methods and resize in the middle behavior | Shu-yu Guo
- 10m | Intl.Segmenter for Stage 4 | Richard Gibson
- 30m | Taking over maintainership of structured clone | Shu-yu Guo

### lunch (60 minutes)

### 13:00-15:00

// we are over-scheduled here by 5 minutes

- 15m | 🔒 Clarify validity of negative expanded year 0 | Jordan Harband
- 60m | 🕐 Partial Application for Stage 2 | Ron Buckton
- 20m | 🔒 JS Module Blocks Update & asking for Stage 3 reviewers | Ron Surma
- 30m | Intl DurationFormat for Stage 3 | Ujjwal Sharma

</details>

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

<details>

<summary>10:00 to 15:00 BST (UTC+1) on 26 October, 2021</summary>

### 10:00-12:00

- 30m | 🔒 Intl Locale Info Update | Frank Yung-Fong Tang
- 30m | JSON.parse source text access update | Richard Gibson
- 30m | Specifying order of lists returned from Intl APIs | Shane F. Carr
- 30m | Status of Ecma / Linux Foundation Collaboration | Michael Saboff & Yulia Startsev

### lunch (60 minutes)

### 13:00-15:00

- 60m | 🔒 Tightening host restrictions to improve testing Jordan Harband
- 30m | 🕐 Extending `null` | Gus Caplan
- 20m | Error Cause for Stage 4 | Chengzhong Wu
- 10m | Array.fromAsync update| J. S. Choi
- 10m | BigInt Math update | J. S. Choi
</details>

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

<details open>

<summary>10:00 to 15:00 BST (UTC+1) on 27 October, 2021</summary>

### 10:00-12:00

- 15m | Destructure Private Fields for Stage 1 or PR | Justin Ridgewell
- 60m | Explicit Resource Management update | Ron Buckton
- 10m | 🔒 Change Array by copy update & request for reviewers* | Ashley Claymore
- 02m | reviewers for explicit resource management!
- 15m | RegExp Modifiers for Stage 1 | Ron Buckton
- 15m | RegExp Conditionals for Stage 1 | Ron Buckton

### lunch (60 minutes)

### 13:00-15:00

- 15m | 🕐 `String.cooked` for Stage 1 | Hemanth HM
- 30m | 🕐 Bind-this operator for Stage 1 | J. S. Choi
- 30m | 🕐 Array Grouping for Stage 2 | Justin Ridgewell
- 45m | 🔒 Normative PRs for Temporal | Philip Chimento, Justin Grant
- 15m | RegExp Extended Mode and Comments for Stage 1 | Ron Buckton

</details>

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

<details open>

<summary>10:00 to 15:00 BST (UTC+1) on 28 October, 2021</summary>

### 10:00-12:00

- 30m | 🔒 Records & Tuples update | Nicolò Ribaudo
- 10m | ⏳ RegExp `\R` Escape for Stage 1? | Ron Buckton
- 10m | ⏳ RegExp Buffer Boundaries (`\A`, `\z`, `\Z`) for Stage 1? | Ron Buckton
- 20m | ⏳ RegExp Atomic Operators for Stage 1? | Ron Buckton
- 45m | 🕐 Evaluator Attributes for Stage 1 | Guy Bedford

### lunch (60 minutes)

### 13:00-15:00

// We have an extra _70 minutes_ here!
- 5m | Agenda deadline rule clarification | Rob Palmer
- 30m | 🕐 Function helpers for Stage 1 | J. S. Choi
- 15m | 🕐 (OVERFLOW) Normative PRs for Temporal | Philip Chimento, Justin Grant
- 10m | (OVERFLOW) Evaluator Attributes for Stage 1 | Guy Bedford
</details>

***

## Overflow

### From agenda

### Timebox overrun

## Schedule constraints

- Jordan Harband will be available after 1PM BST (5AM PT), for his own items, but also for bind-this, array grouping, string.cooked, function helpers, extending null, partial application, evaluator attributes, and subclassing (in that priority order) - also, *if the change array by copy item is not during these times, he would like to be a reviewer.
- Philip Chimento and Justin Grant would prefer Temporal to be scheduled in the last hour of the 26th, 27th, or 28th. _EDIT: and also the 29th for the overflow section._ If that's not possible, we can probably make the first hour work or possibly find an alternate presenter.
- Surma is only available on October 25th
- Nicolò Ribaudo would prefer Records&Tuples to be scheduled after 11:00 BST on Monday 25th, after 13:00 BST on Wednesday 27th, or before 12:00 BST on Thursday 28th.
- Ashley Claymore (change-array-by-copy) is unavaliable after 13:00 BST on Wednesday 27th
- Frank Yung-Fong Tang (Intl Locale info update) is unavaliable Monday 25th and prefer Intl Locale info update to be schedule as first slot in either 26th, 27th, or 28th.

### Key

* ⏳ : late addition for stage advancement and schedule prioritization
* 🔒 : agenda item specifically placed to accomodate schedule constraints
* 🕐 : agenda item should, *where possible*, be scheudled for the afternoon

## Withdrawn

- ~~90m | 🕐 subclassing | Kevin Gibbons and Michael Ficarra~~

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