Repositories list

• test262

  Public

  tc39/test262’s past year of commit activity
  Official ECMAScript Conformance Test Suite

  javascriptjstests+ 1

  javascriptjsteststc39

  JavaScript

  •

  Other

  •534534 forks•2.7k2.7k stars•211211 issues•9494 pull requests•Updated Apr 7, 2026Apr 7, 2026

• agendas

  Public

  tc39/agendas’s past year of commit activity
  TC39 meeting agendas

  JavaScript

  •201201 forks•1.2k1.2k stars•00 issues•33 pull requests•Updated Apr 7, 2026Apr 7, 2026

• ecma262

  Public

  tc39/ecma262’s past year of commit activity
  Status, process, and documents for ECMA-262

  javascriptecmascript

  javascriptecmascript

  HTML

  •

  Other

  •1.4k1.4k forks•16k16k stars•354354 issues•126126 pull requests•Updated Apr 7, 2026Apr 7, 2026

• ecma402

  Public

  tc39/ecma402’s past year of commit activity
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •115115 forks•600600 stars•162162 issues•88 pull requests•Updated Apr 7, 2026Apr 7, 2026

• ecmarkup

  Public

  tc39/ecmarkup’s past year of commit activity
  An HTML superset/Markdown subset source format for ECMAScript and related specifications

  TypeScript

  •

  MIT License

  •7474 forks•238238 stars•100100 issues•1414 pull requests•Updated Apr 7, 2026Apr 7, 2026

• dataset

  Public

  tc39/dataset’s past year of commit activity
  The automatic track tc39 proposals

  tc39

  tc39

  TypeScript

  •

  The Unlicense

  •1111 forks•4747 stars•22 issues•00 pull requests•Updated Apr 7, 2026Apr 7, 2026

• tc39.github.io

  Public

  tc39/tc39.github.io’s past year of commit activity
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •6161 forks•331331 stars•2828 issues•22 pull requests•Updated Apr 3, 2026Apr 3, 2026

• proposal-temporal

  Public

  tc39/proposal-temporal’s past year of commit activity
  Provides standard objects and functions for working with dates and times.

  HTML

  •

  Other

  •174174 forks•3.7k3.7k stars•1717 issues•44 pull requests•Updated Apr 3, 2026Apr 3, 2026

• proposals

  Public

  tc39/proposals’s past year of commit activity
  Tracking ECMAScript Proposals

  javascriptlanguageproposal+ 5

  javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee

  747747 forks•19k19k stars•33 issues•55 pull requests•Updated Apr 2, 2026Apr 2, 2026

• proposal-amount

  Public

  tc39/proposal-amount’s past year of commit activity
  Numbers with precision and a unit for JavaScript

  javascriptunits-of-measurenumbers+ 3

  javascriptunits-of-measurenumbersaccuracymeasurementsprecision

  HTML

  •

  MIT License

  •88 forks•4747 stars•4141 issues•77 pull requests•Updated Apr 2, 2026Apr 2, 2026

• proposal-iterator-chunking

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

  JavaScript

  •11 fork•9797 stars•00 issues•11 pull request•Updated Apr 1, 2026Apr 1, 2026

• how-we-work

  Public
  Documentation of how TC39 operates and how to participate

  2929 forks•216216 stars•2323 issues•99 pull requests•Updated Mar 30, 2026Mar 30, 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•1212 stars•55 issues•00 pull requests•Updated Mar 26, 2026Mar 26, 2026

• proposal-import-sync

  Public
  MIT License

  •22 forks•6363 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

  •1111 forks•159159 stars•66 issues•00 pull requests•Updated Mar 25, 2026Mar 25, 2026

• proposal-esm-phase-imports

  Public
  HTML

  •

  MIT License

  •22 forks•5353 stars•44 issues•44 pull requests•Updated Mar 24, 2026Mar 24, 2026

• notes

  Public
  TC39 meeting notes

  JavaScript

  •125125 forks•706706 stars•11 issue•88 pull requests•Updated Mar 23, 2026Mar 23, 2026

• proposal-deferred-reexports

  Public
  MIT License

  •55 forks•5252 stars•77 issues•22 pull requests•Updated Mar 23, 2026Mar 23, 2026

• ecma426

  Public
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •2525 forks•185185 stars•6363 issues•1010 pull requests•Updated Mar 23, 2026Mar 23, 2026

• proposal-import-text

  Public
  A TC39 proposal for importing text

  00 forks•4242 stars•11 issue•00 pull requests•Updated Mar 23, 2026Mar 23, 2026

• proposal-defer-import-eval

  Public

  tc39/proposal-defer-import-eval’s past year of commit activity
  A proposal for introducing a way to defer evaluate of a module

  HTML

  •

  MIT License

  •2121 forks•306306 stars•66 issues•11 pull request•Updated Mar 20, 2026Mar 20, 2026

• proposal-intl-era-monthcode

  Public
  To specify necessary details about era, eraYear and monthCode usage with Temporal for non-ISO calendars.

  HTML

  •

  MIT License

  •1010 forks•88 stars•44 issues•11 pull request•Updated Mar 19, 2026Mar 19, 2026

• proposal-immutable-arraybuffer

  Public
  A TC39 proposal for immutable ArrayBuffers

  JavaScript

  •

  MIT License

  •55 forks•3636 stars•88 issues•11 pull request•Updated Mar 18, 2026Mar 18, 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 Mar 18, 2026Mar 18, 2026

• proposal-async-context

  Public
  Async Context for JavaScript

  javascript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •2626 forks•836836 stars•2222 issues•88 pull requests•Updated Mar 17, 2026Mar 17, 2026

• proposal-thenable-curtailment

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

  MIT License

  •00 forks•1313 stars•99 issues•00 pull requests•Updated Mar 13, 2026Mar 13, 2026

• proposal-typedarray-concat

  Public
  A proposal for optimizable TypedArray concatenation

  JavaScript

  •

  MIT License

  •00 forks•55 stars•55 issues•11 pull request•Updated Mar 12, 2026Mar 12, 2026

• proposal-iterator-includes

  Public
  Array.prototype.includes but for iterators

  JavaScript

  •11 fork•1010 stars•11 issue•00 pull requests•Updated Mar 12, 2026Mar 12, 2026