Repositories list

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  HTML

  •

  Other

  •1.4k•15k•355•124•Updated Oct 3, 2025Oct 3, 2025

• notes

  Public
  TC39 meeting notes

  JavaScript

  •126•687•1•6•Updated Oct 3, 2025Oct 3, 2025

• tc39.github.io

  Public
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •64•332•27•1•Updated Oct 3, 2025Oct 3, 2025

• test262

  Public
  Official ECMAScript Conformance Test Suite

  jsteststc39+ 1javascript

  JavaScript

  •

  Other

  •502•2.6k•209•62•Updated Oct 3, 2025Oct 3, 2025

• proposal-temporal

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

  HTML

  •

  Other

  •172•3.6k•32•5•Updated Oct 3, 2025Oct 3, 2025

• dataset

  Public
  The automatic track tc39 proposals

  tc39

  TypeScript

  •

  The Unlicense

  •13•46•2•0•Updated Oct 3, 2025Oct 3, 2025

• agendas

  Public
  TC39 meeting agendas

  JavaScript

  •198•1.2k•0•3•Updated Oct 2, 2025Oct 2, 2025

• proposal-upsert

  Public
  ECMAScript Proposal, specs, and reference implementation for Map.prototype.upsert

  MIT License

  •23•312•5•0•Updated Oct 2, 2025Oct 2, 2025

• ecma426

  Public
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •22•169•62•6•Updated Oct 2, 2025Oct 2, 2025

• proposals

  Public
  Tracking ECMAScript Proposals

  languageproposalspec+ 5specificationlanguage-designcommitteejavascriptecmascript

  737•19k•6•3•Updated Oct 2, 2025Oct 2, 2025

• proposal-composites

  Public
  TypeScript

  •

  MIT License

  •6•218•19•0•Updated Oct 2, 2025Oct 2, 2025

• proposal-intl-era-monthcode

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

  HTML

  •

  MIT License

  •8•4•12•5•Updated Oct 1, 2025Oct 1, 2025

• proposal-async-context

  Public
  Async Context for JavaScript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •24•762•23•7•Updated Oct 1, 2025Oct 1, 2025

• source-map-tests

  Public
  JavaScript

  •

  Other

  •10•10•7•0•Updated Oct 1, 2025Oct 1, 2025

• proposal-iterator-chunking

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

  JavaScript

  •1•75•1•0•Updated Sep 29, 2025Sep 29, 2025

• how-we-work

  Public
  Documentation of how TC39 operates and how to participate

  28•212•21•10•Updated Sep 25, 2025Sep 25, 2025

• proposal-amount

  Public
  Numbers with precision and a unit for JavaScript

  javascriptunits-of-measurenumbers+ 3accuracymeasurementsprecision

  HTML

  •

  MIT License

  •5•35•29•2•Updated Sep 24, 2025Sep 24, 2025

• proposal-import-bytes

  Public
  A modest proposal for importing bytes in javascript

  JavaScript

  •

  MIT License

  •2•51•3•0•Updated Sep 24, 2025Sep 24, 2025

• proposal-nonextensible-applies-to-private

  Public
  Proposal to disallow adding new private fields to non-extensible objects

  JavaScript

  •

  MIT License

  •0•8•2•0•Updated Sep 22, 2025Sep 22, 2025

• proposal-immutable-arraybuffer

  Public
  A TC39 proposal for immutable ArrayBuffers

  JavaScript

  •

  MIT License

  •4•31•7•0•Updated Sep 20, 2025Sep 20, 2025

• .github

  Public
  5•3•0•0•Updated Sep 18, 2025Sep 18, 2025

• ecmarkup

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

  HTML

  •

  MIT License

  •75•233•96•9•Updated Sep 16, 2025Sep 16, 2025

• proposal-joint-iteration

  Public
  a TC39 proposal to synchronise the advancement of multiple iterators

  TypeScript

  •3•93•0•0•Updated Sep 15, 2025Sep 15, 2025

• proposal-bulk-add-array-elements

  Public
  A proposal for a new array method to append every element from its argument.

  0•15•4•0•Updated Sep 12, 2025Sep 12, 2025

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •112•581•155•12•Updated Sep 11, 2025Sep 11, 2025

• proposal-deferred-reexports

  Public
  MIT License

  •3•39•2•0•Updated Sep 11, 2025Sep 11, 2025

• proposal-await-dictionary

  Public
  A proposal to add Promise.allKeyed to ECMAScript

  JavaScript

  •

  MIT License

  •6•92•7•0•Updated Sep 9, 2025Sep 9, 2025

• proposal-json-modules

  Public
  Proposal to import JSON files as modules

  HTML

  •

  Apache License 2.0

  •21•284•9•3•Updated Sep 4, 2025Sep 4, 2025

• proposal-type-annotations

  Public
  ECMAScript proposal for type syntax that is erased - Stage 1

  JavaScript

  •51•4.4k•101•2•Updated Aug 27, 2025Aug 27, 2025

• tg5

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

  3•25•28•0•Updated Aug 27, 2025Aug 27, 2025