Repositories list

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •111•581•156•13•Updated Aug 9, 2025Aug 9, 2025

• proposal-temporal

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

  HTML

  •

  Other

  •169•3.6k•39•7•Updated Aug 9, 2025Aug 9, 2025

• dataset

  Public
  The automatic track tc39 proposals

  tc39

  TypeScript

  •

  The Unlicense

  •12•47•2•0•Updated Aug 9, 2025Aug 9, 2025

• tc39.github.io

  Public
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •63•333•27•1•Updated Aug 7, 2025Aug 7, 2025

• ecma426

  Public
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •22•159•61•4•Updated Aug 7, 2025Aug 7, 2025

• proposal-deferred-reexports

  Public
  MIT License

  •3•32•0•0•Updated Aug 7, 2025Aug 7, 2025

• test262-harness

  Public
  Experimental harness for test262

  JavaScript

  •

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

  •47•87•14•3•Updated Aug 7, 2025Aug 7, 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

  •7•4•15•2•Updated Aug 6, 2025Aug 6, 2025

• proposal-import-bytes

  Public
  A modest proposal for importing bytes in javascript

  JavaScript

  •

  MIT License

  •1•36•3•0•Updated Aug 1, 2025Aug 1, 2025

• proposal-object-property-count

  Public
  TC39 proposal for Object.propertyCount(target[, options])

  MIT License

  •2•24•4•1•Updated Jul 31, 2025Jul 31, 2025

• test262

  Public
  Official ECMAScript Conformance Test Suite

  jsteststc39+ 1javascript

  JavaScript

  •

  Other

  •496•2.6k•205•64•Updated Jul 31, 2025Jul 31, 2025

• proposal-intl-keep-trailing-zeros

  Public
  MIT License

  •1•3•3•0•Updated Jul 30, 2025Jul 30, 2025

• proposals

  Public
  Tracking ECMAScript Proposals

  languageproposalspec+ 5specificationlanguage-designcommitteejavascriptecmascript

  737•19k•6•4•Updated Jul 30, 2025Jul 30, 2025

• agendas

  Public
  TC39 meeting agendas

  JavaScript

  •199•1.1k•0•4•Updated Jul 30, 2025Jul 30, 2025

• how-we-work

  Public
  Documentation of how TC39 operates and how to participate

  28•209•20•10•Updated Jul 30, 2025Jul 30, 2025

• proposal-amount

  Public
  Numbers with precision and a unit for JavaScript

  javascriptunits-of-measurenumbers+ 3accuracymeasurementsprecision

  HTML

  •

  MIT License

  •3•27•29•1•Updated Jul 29, 2025Jul 29, 2025

• proposal-nonextensible-applies-to-private

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

  JavaScript

  •

  MIT License

  •0•7•2•0•Updated Jul 29, 2025Jul 29, 2025

• proposal-error-capturestacktrace

  Public
  Standardizing Error.captureStackTrace

  MIT License

  •3•8•3•0•Updated Jul 29, 2025Jul 29, 2025

• proposal-array-from-async

  Public
  Draft specification for a proposed Array.fromAsync method in JavaScript.

  HTML

  •

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

  •16•204•1•0•Updated Jul 29, 2025Jul 29, 2025

• proposal-immutable-arraybuffer

  Public
  A TC39 proposal for immutable ArrayBuffers

  JavaScript

  •

  MIT License

  •3•30•7•0•Updated Jul 28, 2025Jul 28, 2025

• tg5

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

  3•25•28•0•Updated Jul 28, 2025Jul 28, 2025

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  HTML

  •

  Other

  •1.3k•15k•351•137•Updated Jul 28, 2025Jul 28, 2025

• proposal-random-functions

  Public
  Proposal to add a Random namespace and several additional convenience functions for using randomness.

  MIT License

  •5•92•7•0•Updated Jul 25, 2025Jul 25, 2025

• proposal-async-context

  Public
  Async Context for JavaScript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •24•732•22•6•Updated Jul 23, 2025Jul 23, 2025

• proposal-iterator-chunking

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

  JavaScript

  •1•60•3•2•Updated Jul 22, 2025Jul 22, 2025

• notes

  Public
  TC39 meeting notes

  JavaScript

  •122•683•1•7•Updated Jul 18, 2025Jul 18, 2025

• proposal-iterator-sequencing

  Public
  a TC39 proposal to create iterators by sequencing existing iterators

  JavaScript

  •4•75•0•0•Updated Jul 18, 2025Jul 18, 2025

• ecmarkup

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

  HTML

  •

  MIT License

  •71•235•95•9•Updated Jul 15, 2025Jul 15, 2025

• proposal-defer-import-eval

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

  HTML

  •

  MIT License

  •16•288•5•1•Updated Jul 10, 2025Jul 10, 2025

• proposal-pattern-matching

  Public
  Pattern matching syntax for ECMAScript

  HTML

  •

  MIT License

  •90•5.7k•25•0•Updated Jul 7, 2025Jul 7, 2025