# 75th Meeting of TC39

## Day 1

- 10:00-10:30
- Introduce chairs, logistics, preliminary housekeeping
- Recognize volunteers for note-taking
- Adopt agenda
- Approve last meeting's minutes
- Mention next meeting
- 10:30-12:00
- Secretary's report (10 min)
- Project editors' reports (40 min)
- ECMA262
- ECMA402
- TC39-TG2
- ECMA-402 7th Edition RC
- ECMA404
- Test262
- CoC committee update (2 min)
- Web compat PRs
- Generically forbid extensions of all 402 methods Ross Kirsling (5 min)
- Aligning atomics with wasm: allow it on non-shared ArrayBuffers Shu-yu Guo (30 min)
- PSA: Chrome freezing release train Shu-yu Guo (10 min)
- 12:05 lunch (60 minutes)
- 13\:05-14\:50
- 45m Surrogate pairs in RegExp capture group names Kevin Gibbons
- 30m Make SharedArrayBuffer optional Shu-yu Guo
- 30m Add support for 'OptionalChain'.PrivateIdentifier in class features proposals Caio Lima
- 10m Process: require public repo for stage 1 Jordan Harband
- break (10 minutes)
- 15:00-16:00
- 30m TypedArray stride parameter for Stage 2 Shu-yu Guo
- 30m import.meta for stage 4 Gus Caplan and Myles Borins
- break (5 minutes)
- 16:05-17:00
- 30m Decimal update Daniel Ehrenberg
- 10m Logical Assignment for Stage 3 Justin Ridgewell (Possible Overflow to tomorrow)
- 5m Pattern Matching update Jordan Harband
- 15m Surrogate pairs in RegExp capture group names Kevin Gibbons

## Day 2

- 10:00-10:50
- 45m Record and Tuple Update Robin Ricard / Rick Button
- [optional] break (5 minutes)
- 10:55-12:00
- 15m Number.range & BigInt.range for Stage 1 (or 2?) Jack Works
- 15m `this` argument reflection of functions for Stage 1 HE Shi-Jun
- 15m Relax hashbang syntax for Stage 1 HE Shi-Jun
- lunch (60 minutes)
- 13:00-14:15
- 30m WeakRefs FinalizationRegistry API change Daniel Ehrenberg and Shu-yu Guo
- 45m Temporal Update Jason Williams, Philipp Dunkel, Ujjwal Sharma
- break (10 minutes)
- 14:25-15:55
- 30m Ergonomic brand checks for Private Fields for Stage 1 (or 2?) Jordan Harband
- 30m Compartments for Stage 1 Bradley Farias
- 15m Intl.NumberFormat V3 for Stage 1 Shane F. Carr
- break (5 minutes)
- 15:35-17:00
- 20m return of import.meta for stage 4 Gus Caplan and Myles Borins
- 30m Return of Surrogate pairs in RegExp capture group names Kevin Gibbons
- 30m engine262 Gus Caplan

## Day 3

- 10:00-11:30
- 90m Remote Plenaries Chair Group
- [optional] break (5 minutes)
- 11:35-12:00
- 25m Atomics.waitAsync error rejection PR (very late addition, deprioritize) Shu-yu Guo
- lunch (60 minutes)
- 13:00-13:55
- 25m Revisit WeakRefs FinalizationRegistry API change Daniel Ehrenberg and Shu-yu Guo
- 15m Decorators update/call for participation (placed here, deprioritized, as it's a late addition) Daniel Ehrenberg
- 15m Vote on ecma262 2020 spec draft
- break (10 minutes)
- 14:05-16:00
- 30m Incubator call chartering Shu-yu Guo
- 30m Discuss process changes we implemented in February to accommodate US members and US delegates Michael Ficarra and Myles Borins
- **55min TIME AVAILABLE**