Repositories list

• proposal-amount

  Public
  Numbers with precision and a unit for JavaScript

  javascriptunits-of-measurenumbers+ 3

  javascriptunits-of-measurenumbersaccuracymeasurementsprecision

  HTML

  •

  MIT License

  •99 forks•4747 stars•4242 issues•55 pull requests•Updated Apr 29, 2026Apr 29, 2026

• proposal-stable-formatting

  Public
  A TC-39 proposal to bring stable Intl-inspired formatting options to ECMAScript

  HTML

  •22 forks•1313 stars•44 issues•00 pull requests•Updated Apr 29, 2026Apr 29, 2026

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  javascriptecmascript

  HTML

  •

  Other

  •1.4k1.4k forks•16k16k stars•357357 issues•123123 pull requests•Updated Apr 29, 2026Apr 29, 2026

• dataset

  Public
  The automatic track tc39 proposals

  tc39

  tc39

  TypeScript

  •

  The Unlicense

  •1111 forks•4747 stars•22 issues•00 pull requests•Updated Apr 29, 2026Apr 29, 2026

• tc39.github.io

  Public
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •6262 forks•331331 stars•2727 issues•55 pull requests•Updated Apr 28, 2026Apr 28, 2026

• test262

  Public
  Official ECMAScript Conformance Test Suite

  javascriptjstests+ 1

  javascriptjsteststc39

  JavaScript

  •

  Other

  •542542 forks•2.7k2.7k stars•212212 issues•108108 pull requests•Updated Apr 27, 2026Apr 27, 2026

• proposal-deferred-reexports

  Public
  MIT License

  •55 forks•5252 stars•77 issues•22 pull requests•Updated Apr 27, 2026Apr 27, 2026

• proposals

  Public
  Tracking ECMAScript Proposals

  javascriptlanguageproposal+ 5

  javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee

  743743 forks•19k19k stars•33 issues•33 pull requests•Updated Apr 27, 2026Apr 27, 2026

• proposal-esm-phase-imports

  Public
  HTML

  •

  MIT License

  •22 forks•5353 stars•44 issues•44 pull requests•Updated Apr 25, 2026Apr 25, 2026

• notes

  Public
  TC39 meeting notes

  JavaScript

  •125125 forks•705705 stars•11 issue•99 pull requests•Updated Apr 22, 2026Apr 22, 2026

• proposal-thenable-curtailment

  Public
  A proposal to curtail the power of "thenable" objects.

  MIT License

  •11 fork•1414 stars•1010 issues•22 pull requests•Updated Apr 21, 2026Apr 21, 2026

• proposal-defer-import-eval

  Public
  A proposal for introducing a way to defer evaluate of a module

  HTML

  •

  MIT License

  •2020 forks•308308 stars•66 issues•11 pull request•Updated Apr 21, 2026Apr 21, 2026

• proposal-intl-unit-protocol

  Public
  TC39 proposal for adding units to format functions

  JavaScript

  •

  MIT License

  •00 forks•88 stars•22 issues•00 pull requests•Updated Apr 21, 2026Apr 21, 2026

• proposal-json-parseimmutable

  Public
  JSON.parseImmutable for creating Records and Tuples from JSON strings

  HTML

  •

  MIT License

  •22 forks•4545 stars•33 issues•11 pull request•Updated Apr 20, 2026Apr 20, 2026

• tg5

  Public
  TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/

  33 forks•2626 stars•2828 issues•00 pull requests•Updated Apr 20, 2026Apr 20, 2026

• ecmarkup

  Public
  An HTML superset/Markdown subset source format for ECMAScript and related specifications

  TypeScript

  •

  MIT License

  •7575 forks•241241 stars•9999 issues•1616 pull requests•Updated Apr 18, 2026Apr 18, 2026

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •114114 forks•599599 stars•168168 issues•1111 pull requests•Updated Apr 17, 2026Apr 17, 2026

• agendas

  Public
  TC39 meeting agendas

  JavaScript

  •200200 forks•1.2k1.2k stars•00 issues•33 pull requests•Updated Apr 15, 2026Apr 15, 2026

• ecma426

  Public
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •2525 forks•185185 stars•6363 issues•1010 pull requests•Updated Apr 15, 2026Apr 15, 2026

• proposal-async-context

  Public
  Async Context for JavaScript

  javascript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •2626 forks•839839 stars•2323 issues•77 pull requests•Updated Apr 13, 2026Apr 13, 2026

• proposal-iterator-includes

  Public
  Array.prototype.includes but for iterators

  JavaScript

  •22 forks•1010 stars•11 issue•00 pull requests•Updated Apr 11, 2026Apr 11, 2026

• how-we-work

  Public
  Documentation of how TC39 operates and how to participate

  2929 forks•218218 stars•2323 issues•99 pull requests•Updated Apr 10, 2026Apr 10, 2026

• proposal-duplicate-named-capturing-groups

  Public archive
  TC39 proposal to allow regex capturing group names to be repeated

  11 fork•3131 stars•11 issue•00 pull requests•Updated Apr 10, 2026Apr 10, 2026

• proposal-iterator-chunking

  Public
  a proposal to add a method to iterators for producing an iterator of its subsequences

  JavaScript

  •11 fork•9999 stars•00 issues•11 pull request•Updated Apr 8, 2026Apr 8, 2026

• proposal-temporal

  Public
  Provides standard objects and functions for working with dates and times.

  HTML

  •

  Other

  •175175 forks•3.7k3.7k stars•2020 issues•44 pull requests•Updated Apr 8, 2026Apr 8, 2026

• proposal-await-dictionary

  Public
  A proposal to add Promise.allKeyed to ECMAScript

  JavaScript

  •

  MIT License

  •88 forks•129129 stars•44 issues•00 pull requests•Updated Mar 27, 2026Mar 27, 2026

• test262-harness

  Public
  Experimental harness for test262

  JavaScript

  •

  BSD 3-Clause "New" or "Revised" License

  •4949 forks•9494 stars•1414 issues•77 pull requests•Updated Mar 26, 2026Mar 26, 2026

• proposal-error-capturestacktrace

  Public
  Standardizing Error.captureStackTrace

  MIT License

  •44 forks•1515 stars•55 issues•00 pull requests•Updated Mar 26, 2026Mar 26, 2026

• proposal-import-sync

  Public
  MIT License

  •22 forks•6565 stars•77 issues•11 pull request•Updated Mar 25, 2026Mar 25, 2026

• proposal-source-phase-imports

  Public
  Proposal to enable importing modules at the source phase

  javascriptproposaltc39

  javascriptproposaltc39

  HTML

  •

  MIT License

  •1212 forks•160160 stars•66 issues•00 pull requests•Updated Mar 25, 2026Mar 25, 2026