Agenda for the 92nd meeting of Ecma TC39

September 24, 2025 · View on GitHub

Agenda for the 92nd meeting of Ecma TC39

  • Host: TBD
  • Dates and times:
    • 10:00 to 15:00 JST (Asia/Tokyo) on Tuesday 13 September 2022
    • 10:00 to 15:00 JST (Asia/Tokyo) on Wednesday 14 September 2022
    • 10:00 to 15:00 JST (Asia/Tokyo) on Thursday 15 September 2022
    • 10:00 to 15:00 JST (Asia/Tokyo) on Friday 16 September 2022
  • Location: Remote
  • Attendee information: Reflector Post

For meeting times in your timezone, visit Temporal docs and run the code below in the devtools console.

Temporal.ZonedDateTime.from('2022-09-13T10:00[Asia/Tokyo]')
  .withTimeZone(Temporal.Now.timeZone()) // your time zone
  .toLocaleString();

Background:

Agenda topic rules

Deadline for advancement eligibility: September 3rd, 10:00 JST

  • Note: this time is selected to be precisely 10 days prior to the start of the meeting
  1. Proposals not looking to advance may be added at any time; if after the deadline, please always use a pull request so that members are notified of changes. Note: an unmerged PR counts as ”added” for the purposes of this requirement.
  2. Proposals seeking feedback at stage 0 must be added (and noted as such) prior to the deadline, or else delegates may object to advancement solely on the basis of missing the deadline.
    1. Such proposals should include supporting materials when possible.
  3. Proposals looking to advance to stage 1 must be added (and noted as such) prior to the deadline, or else delegates may object to advancement solely on the basis of missing the deadline.
    1. Such proposals must link to a proposal repository and they should link to supporting materials when possible.
  4. Proposals looking to advance to stages 2, 3, or 4 must be added (and noted as such) along with the necessary materials prior to the deadline, or else delegates may object to advancement solely on the basis of missing the deadline.
    1. Such proposals must link to supporting materials prior to the deadline, or else delegates may object to advancement solely on the basis of missing the deadline. If these materials change substantially after the deadline, the proposal may be disqualified from advancement, based on the committee’s judgment.
    2. Proposals looking to advance to stage 4 must link to a pull request into the spec, since the process requires one.
  5. Proposal-based agenda items should be sorted primarily by stage (descending), secondarily by timebox (ascending), and finally by insertion date.

Supporting materials includes slides, a link to the proposal repository, a link to spec text, etc.; essentially, anything you are planning to present to the committee, or that would be useful for delegates to review.

Agenda items

  1. Opening, welcome and roll call (Chair)

    1. Opening of the meeting
    2. TC39 follows its Code of Conduct
    3. Introduction of attendees
    4. Host facilities, local logistics
    5. Quick recap of meeting IPR policy
    6. Overview of communication tools
    7. Reminder to review Github Delegate teams (Jordan Harband)

  2. Find volunteers for note taking

  3. Adoption of the agenda

  4. Approval of the minutes from last meeting

  5. Next meeting host and logistics

  6. Secretary's Report (15m, Istvan Sebestyen) https://github.com/tc39/agendas/blob/HEAD/2022/tc39-2022-039.pdf

  7. Project Editors’ Reports

    1. ECMA262 Status Updates (slides) (15m)
    2. ECMA402 Status Updates (15m)
    3. ECMA404 Status Updates (15m)
    4. Test262 Status Updates (15m)

  8. Updates from the CoC Committee (15m)

  9. Web compatibility issues / Needs Consensus PRs

    ✓timeboxtopicpresenter

  10. Overflow from previous meeting

    ✓timeboxtopicpresenter

  11. Incubation call chartering (15m on the last day)

  12. Short (≤30m) Timeboxed Discussions

    ✓timeboxtopicpresenter
    30mRefactor of import-related Host Hooks (repo, slides)Nicolò Ribaudo

  13. Proposals

    ✓ represents an agenda item which has been presented, and does not indicate stage advancement

    ✓stagetimeboxtopicpresenter
    330mIntl.DurationFormat Stage 3 Update (slides)Ujjwal Sharma
    320mTemporal update & normative changes (slides)Philip Chimento
    330mShadowRealm Update (slides)Leo Balter, Caridy Patiño, Rick Waldron
    230mString.dedent PR #60 (slides)Justin Ridgewell
    245mRecord & Tuple Update (slides)Robin Ricard, Rick Button, Ashley Claymore, Nicolò Ribaudo
    245mDiscussion: switching iterator helpers to functions (slides)Axel Rauschmayer
    260mIterator Helpers for stage 3 (slides)Michael Ficarra
    260mArray.fromAsync for Stage 3 (slides)J. S. Choi
    260mSet methods discussion (slides)Kevin Gibbons
    260mExplicit Resource Management for Stage 3 (slides, spec)Ron Buckton
    130mWell-Formed Unicode Strings for stage 2 (slides)Michael Ficarra
    060mExtractors for Stage 1 (slides)Ron Buckton

  14. Longer or open-ended discussions

    ✓timeboxtopicpresenter

  15. Overflow from timeboxed agenda items (in insertion order)

    ✓topicpresenter

  16. Other business

    1. Thank host

  17. Adjournment

Schedule constraints

Schedule constraints should be supplied here 48 hours before the meeting begins so that the Chairs can take them into account when preparing the schedule.

  • JSC cannot be present on Tuesday, September 13 on 10–11 am GMT+9 (6–7 pm PDT).

Normal Constraints

  • Axel Rauschmayer: If possible, I’d like to start as early as possible (any of the 4 days is OK). Later times would be challenging, due to the time difference with Europe.
  • Nicolò Ribaudo will not be available on Friday, and wants to be present for "Refactor of import-related Host Hooks" and "Record & Tuple".
  • Robin Ricard will only be available during the second slots every day: 13:00 to 15:00 JST
  • Patrick Soquet will only be available during the second slots every day: 13:00 to 15:00 JST. Patrick wants to be present for "Refactor of import-related Host Hooks" and "Record & Tuple".
  • Mathieu Hofman will only be available during the first slot of every day: 10:00 to 12:00 JST, and would like to be present for "Explicit Resource Management"
  • Philip Chimento unavailable during Day 3 and the first slot of Day 2. Second slot of Day 2 is OK but not preferred. Must be present for "Temporal update" and would prefer to be present for "Intl.DurationFormat" and both iterator helpers items.

Late-breaking Schedule Constraints

Dates and locations of future meetings

DatesLocation
2022-11-29 to 2022-12-01A Coruña, Spain