Repositories list

• ecma426

  Public

  tc39/ecma426’s past year of commit activity
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •25•175•62•8•Updated Jan 29, 2026Jan 29, 2026

• test262

  Public

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

  javascriptjstests+ 1tc39

  JavaScript

  •

  Other

  •522•2.7k•208•81•Updated Jan 29, 2026Jan 29, 2026

• proposals

  Public

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

  javascriptlanguageproposal+ 5ecmascriptspecspecificationlanguage-designcommittee

  738•19k•2•1•Updated Jan 29, 2026Jan 29, 2026

• proposal-deferred-reexports

  Public
  MIT License

  •5•45•7•3•Updated Jan 29, 2026Jan 29, 2026

• proposal-temporal

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

  HTML

  •

  Other

  •172•3.7k•30•10•Updated Jan 29, 2026Jan 29, 2026

• ecmarkup

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

  HTML

  •

  MIT License

  •73•234•99•13•Updated Jan 29, 2026Jan 29, 2026

• dataset

  Public

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

  tc39

  TypeScript

  •

  The Unlicense

  •11•46•2•0•Updated Jan 29, 2026Jan 29, 2026

• proposal-intl-era-monthcode

  Public

  tc39/proposal-intl-era-monthcode’s past year of commit activity
  To specify necessary details about era, eraYear and monthCode usage with Temporal for non-ISO calendars.

  HTML

  •

  MIT License

  •8•6•7•0•Updated Jan 28, 2026Jan 28, 2026

• agendas

  Public

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

  JavaScript

  •200•1.2k•0•2•Updated Jan 27, 2026Jan 27, 2026

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  HTML

  •

  Other

  •1.4k•16k•357•116•Updated Jan 27, 2026Jan 27, 2026

• proposal-async-context

  Public

  tc39/proposal-async-context’s past year of commit activity
  Async Context for JavaScript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •25•812•23•7•Updated Jan 27, 2026Jan 27, 2026

• tc39.github.io

  Public
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •61•332•28•2•Updated Jan 26, 2026Jan 26, 2026

• proposal-signals

  Public
  A proposal to add signals to JavaScript.

  MIT License

  •71•4.1k•100•8•Updated Jan 25, 2026Jan 25, 2026

• test262-harness

  Public
  Experimental harness for test262

  JavaScript

  •

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

  •47•91•14•5•Updated Jan 24, 2026Jan 24, 2026

• proposal-smart-unit-preferences

  Public
  HTML

  •

  MIT License

  •6•25•5•0•Updated Jan 23, 2026Jan 23, 2026

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •114•594•158•9•Updated Jan 23, 2026Jan 23, 2026

• proposal-composable-accessors

  Public
  Incrementally add functionality to accessors via built-in decorators

  1•6•0•1•Updated Jan 23, 2026Jan 23, 2026

• proposal-alias-accessors

  Public
  0•7•0•0•Updated Jan 23, 2026Jan 23, 2026

• proposal-regexp-atomic-operators

  Public
  JavaScript

  •

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

  •1•21•5•0•Updated Jan 22, 2026Jan 22, 2026

• proposal-error-limit-option

  Public
  ECMAScript Proposal: Error option `limit`

  HTML

  •

  MIT License

  •0•7•1•0•Updated Jan 21, 2026Jan 21, 2026

• proposal-error-frames-above

  Public
  ECMAScript Proposal: Error option `framesAbove`

  HTML

  •

  MIT License

  •0•6•3•0•Updated Jan 21, 2026Jan 21, 2026

• tg5

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

  3•26•28•0•Updated Jan 20, 2026Jan 20, 2026

• proposal-error-capturestacktrace

  Public
  Standardizing Error.captureStackTrace

  MIT License

  •4•13•5•0•Updated Jan 20, 2026Jan 20, 2026

• proposal-import-sync

  Public
  MIT License

  •2•56•7•0•Updated Jan 20, 2026Jan 20, 2026

• proposal-intl-unit-format

  Public archive
  `Intl.UnitFormat` specification [draft]

  HTML

  •3•10•5•0•Updated Jan 20, 2026Jan 20, 2026

• proposal-decimal

  Public
  Built-in exact decimal numbers for JavaScript

  javascriptarithmeticdecimal+ 2ieee754decimal128

  HTML

  •18•600•54•1•Updated Jan 19, 2026Jan 19, 2026

• notes

  Public
  TC39 meeting notes

  JavaScript

  •125•700•1•7•Updated Jan 16, 2026Jan 16, 2026

• proposal-defer-import-eval

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

  HTML

  •

  MIT License

  •21•303•6•1•Updated Jan 15, 2026Jan 15, 2026

• proposal-function-and-object-literal-element-decorators

  Public
  ECMAScript Decorators for Function Expressions and Declarations

  MIT License

  •0•74•3•0•Updated Jan 12, 2026Jan 12, 2026

• proposal-joint-iteration

  Public
  a TC39 proposal to synchronise the advancement of multiple iterators

  TypeScript

  •4•109•1•0•Updated Jan 12, 2026Jan 12, 2026