Repositories list

• tc39.github.io

  Public
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •63•328•26•2•Updated Jun 1, 2025Jun 1, 2025

• test262

  Public
  Official ECMAScript Conformance Test Suite

  jsteststc39+ 1javascript

  JavaScript

  •

  Other

  •489•2.5k•202•54•Updated Jun 1, 2025Jun 1, 2025

• dataset

  Public
  The automatic track tc39 proposals

  tc39

  TypeScript

  •

  The Unlicense

  •10•47•2•0•Updated Jun 1, 2025Jun 1, 2025

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •108•570•153•9•Updated May 31, 2025May 31, 2025

• proposal-concurrency-control

  Public
  interfaces and data structures for concurrency control and integration into async iterator helpers

  TypeScript

  •0•38•8•1•Updated May 31, 2025May 31, 2025

• proposal-immutable-arraybuffer

  Public
  A TC39 proposal for immutable ArrayBuffers

  JavaScript

  •

  MIT License

  •3•29•6•0•Updated May 30, 2025May 30, 2025

• agendas

  Public
  TC39 meeting agendas

  JavaScript

  •195•1.1k•0•2•Updated May 30, 2025May 30, 2025

• proposal-decimal

  Public
  Built-in exact decimal numbers for JavaScript

  javascriptarithmeticdecimal+ 2ieee754decimal128

  HTML

  •19•549•55•1•Updated May 30, 2025May 30, 2025

• proposal-deferred-reexports

  Public
  MIT License

  •3•32•0•0•Updated May 30, 2025May 30, 2025

• notes

  Public
  TC39 meeting notes

  JavaScript

  •117•672•1•7•Updated May 30, 2025May 30, 2025

• proposal-seeded-random

  Public
  Proposal for a new SeededPRNG class that yields reproducible sequences of random numbers.

  HTML

  •

  MIT License

  •6•171•4•1•Updated May 30, 2025May 30, 2025

• proposal-bigint-math

  Public
  Draft specification for supporting BigInts in JavaScript’s Math methods.

  proposalbiginttc39+ 1math

  HTML

  •

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

  •4•39•3•0•Updated May 29, 2025May 29, 2025

• proposal-temporal

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

  HTML

  •

  Other

  •166•3.5k•38•7•Updated May 29, 2025May 29, 2025

• proposal-intl-keep-trailing-zeros

  Public
  MIT License

  •0•2•1•0•Updated May 29, 2025May 29, 2025

• proposal-math-clamp

  Public
  A TC39 proposal to add Math.clamp

  MIT License

  •1•78•7•0•Updated May 29, 2025May 29, 2025

• proposal-random-functions

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

  MIT License

  •2•56•7•0•Updated May 29, 2025May 29, 2025

• proposal-thenable-curtailment

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

  MIT License

  •0•10•2•0•Updated May 28, 2025May 28, 2025

• proposals

  Public
  Tracking ECMAScript Proposals

  languageproposalspec+ 5specificationlanguage-designcommitteejavascriptecmascript

  730•19k•6•4•Updated May 28, 2025May 28, 2025

• proposal-is-error

  Public archive
  ECMAScript Proposal, specs, and reference implementation for Error.isError

  HTML

  •

  MIT License

  •2•126•0•0•Updated May 28, 2025May 28, 2025

• proposal-global

  Public archive
  ECMAScript Proposal, specs, and reference implementation for `global`

  HTML

  •

  MIT License

  •18•351•0•0•Updated May 27, 2025May 27, 2025

• proposal-object-property-count

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

  MIT License

  •2•17•5•0•Updated May 27, 2025May 27, 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•197•1•0•Updated May 26, 2025May 26, 2025

• proposal-float16array

  Public archive
  a proposal to add float16 TypedArrays to JavaScript

  HTML

  •3•62•2•0•Updated May 24, 2025May 24, 2025

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  HTML

  •

  Other

  •1.3k•15k•339•131•Updated May 23, 2025May 23, 2025

• proposal-iterator-chunking

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

  JavaScript

  •1•56•2•3•Updated May 22, 2025May 22, 2025

• proposal-defer-import-eval

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

  HTML

  •

  MIT License

  •13•262•4•0•Updated May 21, 2025May 21, 2025

• proposal-oom-fails-fast

  Public
  Proposal: Out of memory immediately terminates agent cluster

  JavaScript

  •

  Apache License 2.0

  •4•19•7•0•Updated May 21, 2025May 21, 2025

• tg5

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

  3•23•27•0•Updated May 19, 2025May 19, 2025

• proposal-joint-iteration

  Public
  a TC39 proposal to synchronise the advancement of multiple iterators

  TypeScript

  •4•83•0•0•Updated May 16, 2025May 16, 2025

• proposal-symbols-as-weakmap-keys

  Public archive
  Permit Symbols as keys in WeakMaps, entries in WeakSets and WeakRefs, and registered in FinalizationRegistries

  recordtupletc39+ 4membranesrealmssymbolsweakmap-keys

  MIT License

  •8•89•2•0•Updated May 16, 2025May 16, 2025