Repositories list

• 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

  •172•3.6k•34•7•Updated Oct 31, 2025Oct 31, 2025

• test262

  Public

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

  javascriptjstests+ 1tc39

  JavaScript

  •

  Other

  •506•2.6k•210•72•Updated Oct 31, 2025Oct 31, 2025

• dataset

  Public

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

  tc39

  TypeScript

  •

  The Unlicense

  •13•45•2•0•Updated Oct 31, 2025Oct 31, 2025

• agendas

  Public
  TC39 meeting agendas

  JavaScript

  •199•1.2k•0•4•Updated Oct 29, 2025Oct 29, 2025

• proposal-thenable-curtailment

  Public

  tc39/proposal-thenable-curtailment’s past year of commit activity
  A proposal to curtail the power of "thenable" objects.

  MIT License

  •0•10•5•0•Updated Oct 29, 2025Oct 29, 2025

• tg5

  Public

  tc39/tg5’s past year of commit activity
  TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/

  3•25•28•0•Updated Oct 29, 2025Oct 29, 2025

• tc39.github.io

  Public

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

  HTML

  •

  MIT License

  •64•332•27•2•Updated Oct 29, 2025Oct 29, 2025

• proposal-intl-keep-trailing-zeros

  Public

  tc39/proposal-intl-keep-trailing-zeros’s past year of commit activity
  MIT License

  •1•3•2•1•Updated Oct 29, 2025Oct 29, 2025

• proposal-await-dictionary

  Public
  A proposal to add Promise.allKeyed to ECMAScript

  JavaScript

  •

  MIT License

  •6•93•6•0•Updated Oct 29, 2025Oct 29, 2025

• proposal-math-sum

  Public

  tc39/proposal-math-sum’s past year of commit activity
  TC39 proposal to add a summation method to JavaScript

  JavaScript

  •5•124•5•0•Updated Oct 28, 2025Oct 28, 2025

• proposal-arraybuffer-base64

  Public archive
  TC39 proposal for Uint8Array<->base64/hex

  HTML

  •

  MIT License

  •13•280•5•1•Updated Oct 28, 2025Oct 28, 2025

• proposal-inspector

  Public
  ECMAScript Proposal, specs, and reference implementation for Inspector

  MIT License

  •1•6•1•0•Updated Oct 27, 2025Oct 27, 2025

• how-we-work

  Public
  Documentation of how TC39 operates and how to participate

  29•212•22•10•Updated Oct 27, 2025Oct 27, 2025

• proposal-deferred-reexports

  Public
  MIT License

  •3•42•1•1•Updated Oct 26, 2025Oct 26, 2025

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  HTML

  •

  Other

  •1.4k•16k•357•129•Updated Oct 24, 2025Oct 24, 2025

• proposal-decimal

  Public
  Built-in exact decimal numbers for JavaScript

  javascriptarithmeticdecimal+ 2ieee754decimal128

  HTML

  •20•577•52•0•Updated Oct 23, 2025Oct 23, 2025

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •113•584•156•12•Updated Oct 22, 2025Oct 22, 2025

• proposals

  Public
  Tracking ECMAScript Proposals

  javascriptlanguageproposal+ 5ecmascriptspecspecificationlanguage-designcommittee

  739•19k•6•3•Updated Oct 21, 2025Oct 21, 2025

• proposal-error-capturestacktrace

  Public
  Standardizing Error.captureStackTrace

  MIT License

  •3•8•5•1•Updated Oct 21, 2025Oct 21, 2025

• proposal-import-bytes

  Public
  A modest proposal for importing bytes in javascript

  JavaScript

  •

  MIT License

  •5•64•3•0•Updated Oct 21, 2025Oct 21, 2025

• ecma426

  Public
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •22•170•62•7•Updated Oct 20, 2025Oct 20, 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•2•Updated Oct 16, 2025Oct 16, 2025

• proposal-intl-locale-info

  Public
  An API to expose information of locale, such as week data ( first day of a week, weekend start, weekend end), hour cycle, measurement system, commonly used calendar, etc.

  HTML

  •

  MIT License

  •13•60•1•1•Updated Oct 14, 2025Oct 14, 2025

• proposal-Declarations-in-Conditionals

  Public
  JavaScript

  •4•107•10•0•Updated Oct 13, 2025Oct 13, 2025

• proposal-async-context

  Public
  Async Context for JavaScript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •24•776•22•6•Updated Oct 7, 2025Oct 7, 2025

• proposal-pattern-matching

  Public
  Pattern matching syntax for ECMAScript

  HTML

  •

  MIT License

  •90•5.7k•24•0•Updated Oct 5, 2025Oct 5, 2025

• notes

  Public
  TC39 meeting notes

  JavaScript

  •126•690•1•7•Updated Oct 3, 2025Oct 3, 2025

• proposal-upsert

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

  MIT License

  •23•316•5•0•Updated Oct 2, 2025Oct 2, 2025

• proposal-composites

  Public
  TypeScript

  •

  MIT License

  •6•223•20•0•Updated Oct 2, 2025Oct 2, 2025

• source-map-tests

  Public
  JavaScript

  •

  Other

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