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Ecma TC39

Ecma International, Technical Committee 39 - ECMAScript

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https://tc39.es
@TC39@fosstodon.org
company/tc39
@TC39

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ecma262 ecma262 Public

Status, process, and documents for ECMA-262

HTML 15.4k 1.4k
ecma402 ecma402 Public

Status, process, and documents for ECMA 402

HTML 579 111
test262 test262 Public

Official ECMAScript Conformance Test Suite

JavaScript 2.6k 499
proposals proposals Public

Tracking ECMAScript Proposals

18.9k 739
agendas agendas Public

TC39 meeting agendas

JavaScript 1.1k 199
notes notes Public

TC39 meeting notes

JavaScript 684 122

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Showing 10 of 307 repositories

ecma426 Public
Source map specification, RFCs and new proposals.

tc39/ecma426’s past year of commit activity

JavaScript 161 22 61 8 Updated Aug 29, 2025
proposal-await-dictionary Public
A proposal to add Promise.ownProperties(), Promise.fromEntries() to ECMAScript

tc39/proposal-await-dictionary’s past year of commit activity

JavaScript 87 MIT 6 6 0 Updated Aug 29, 2025
dataset Public
The automatic track tc39 proposals

tc39/dataset’s past year of commit activity

TypeScript 46 Unlicense 12 2 0 Updated Aug 29, 2025
test262 Public
Official ECMAScript Conformance Test Suite

tc39/test262’s past year of commit activity

JavaScript 2,583 499 204 (4 issues need help) 63 Updated Aug 27, 2025
proposal-type-annotations Public
ECMAScript proposal for type syntax that is erased - Stage 1

tc39/proposal-type-annotations’s past year of commit activity

JavaScript 4,345 51 99 2 Updated Aug 27, 2025
tg5 Public
TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/

tc39/tg5’s past year of commit activity

25 3 28 (6 issues need help) 0 Updated Aug 27, 2025
tc39.github.io Public
Get involved in specifying JavaScript

tc39/tc39.github.io’s past year of commit activity

HTML 332 MIT 63 27 (3 issues need help) 1 Updated Aug 27, 2025
how-we-work Public
Documentation of how TC39 operates and how to participate

tc39/how-we-work’s past year of commit activity

212 28 20 9 Updated Aug 26, 2025
ecma262 Public
Status, process, and documents for ECMA-262

tc39/ecma262’s past year of commit activity

HTML 15,443 1,355 353 (10 issues need help) 130 Updated Aug 26, 2025
proposal-temporal Public
Provides standard objects and functions for working with dates and times.

tc39/proposal-temporal’s past year of commit activity

HTML 3,585 170 30 5 Updated Aug 25, 2025

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javascript proposal tc39 ecmascript tuple

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