Repositories list

• proposal-temporal

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

  HTML

  •

  Other

  •174•3.7k•16•5•Updated Mar 31, 2026Mar 31, 2026

• dataset

  Public
  The automatic track tc39 proposals

  tc39

  tc39

  TypeScript

  •

  The Unlicense

  •11•47•2•0•Updated Mar 31, 2026Mar 31, 2026

• test262

  Public
  Official ECMAScript Conformance Test Suite

  javascriptjstests+ 1

  javascriptjsteststc39

  JavaScript

  •

  Other

  •534•2.7k•211•96•Updated Mar 30, 2026Mar 30, 2026

• tc39.github.io

  Public
  Get involved in specifying JavaScript

  HTML

  •

  MIT License

  •61•331•28•2•Updated Mar 30, 2026Mar 30, 2026

• ecma262

  Public
  Status, process, and documents for ECMA-262

  javascriptecmascript

  javascriptecmascript

  HTML

  •

  Other

  •1.4k•16k•356•125•Updated Mar 30, 2026Mar 30, 2026

• ecmarkup

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

  TypeScript

  •

  MIT License

  •74•238•100•14•Updated Mar 30, 2026Mar 30, 2026

• proposal-amount

  Public
  Numbers with precision and a unit for JavaScript

  javascriptunits-of-measurenumbers+ 3

  javascriptunits-of-measurenumbersaccuracymeasurementsprecision

  HTML

  •

  MIT License

  •8•47•37•6•Updated Mar 30, 2026Mar 30, 2026

• how-we-work

  Public
  Documentation of how TC39 operates and how to participate

  29•216•23•9•Updated Mar 30, 2026Mar 30, 2026

• proposal-await-dictionary

  Public
  A proposal to add Promise.allKeyed to ECMAScript

  JavaScript

  •

  MIT License

  •8•128•4•0•Updated Mar 27, 2026Mar 27, 2026

• agendas

  Public
  TC39 meeting agendas

  JavaScript

  •201•1.2k•0•3•Updated Mar 26, 2026Mar 26, 2026

• test262-harness

  Public
  Experimental harness for test262

  JavaScript

  •

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

  •49•94•14•7•Updated Mar 26, 2026Mar 26, 2026

• proposal-error-capturestacktrace

  Public
  Standardizing Error.captureStackTrace

  MIT License

  •4•12•5•0•Updated Mar 26, 2026Mar 26, 2026

• proposal-import-sync

  Public
  MIT License

  •2•63•7•1•Updated Mar 25, 2026Mar 25, 2026

• proposal-source-phase-imports

  Public
  Proposal to enable importing modules at the source phase

  javascriptproposaltc39

  javascriptproposaltc39

  HTML

  •

  MIT License

  •11•159•6•0•Updated Mar 25, 2026Mar 25, 2026

• proposal-esm-phase-imports

  Public
  HTML

  •

  MIT License

  •2•53•4•4•Updated Mar 24, 2026Mar 24, 2026

• ecma402

  Public
  Status, process, and documents for ECMA 402

  HTML

  •

  Other

  •115•598•162•7•Updated Mar 24, 2026Mar 24, 2026

• proposals

  Public
  Tracking ECMAScript Proposals

  javascriptlanguageproposal+ 5

  javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee

  746•19k•3•4•Updated Mar 23, 2026Mar 23, 2026

• notes

  Public
  TC39 meeting notes

  JavaScript

  •125•706•1•7•Updated Mar 23, 2026Mar 23, 2026

• proposal-deferred-reexports

  Public
  MIT License

  •5•52•7•2•Updated Mar 23, 2026Mar 23, 2026

• ecma426

  Public
  Source map specification, RFCs and new proposals.

  JavaScript

  •

  Other

  •25•184•63•10•Updated Mar 23, 2026Mar 23, 2026

• proposal-import-text

  Public
  A TC39 proposal for importing text

  0•40•1•0•Updated Mar 23, 2026Mar 23, 2026

• proposal-defer-import-eval

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

  HTML

  •

  MIT License

  •21•305•6•1•Updated Mar 20, 2026Mar 20, 2026

• proposal-intl-era-monthcode

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

  HTML

  •

  MIT License

  •10•8•4•1•Updated Mar 19, 2026Mar 19, 2026

• proposal-immutable-arraybuffer

  Public
  A TC39 proposal for immutable ArrayBuffers

  JavaScript

  •

  MIT License

  •5•36•8•1•Updated Mar 18, 2026Mar 18, 2026

• tg5

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

  3•26•28•0•Updated Mar 18, 2026Mar 18, 2026

• proposal-async-context

  Public
  Async Context for JavaScript

  javascript

  javascript

  HTML

  •

  Creative Commons Zero v1.0 Universal

  •26•834•22•7•Updated Mar 17, 2026Mar 17, 2026

• proposal-thenable-curtailment

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

  MIT License

  •0•13•8•0•Updated Mar 13, 2026Mar 13, 2026

• proposal-typedarray-concat

  Public
  A proposal for optimizable TypedArray concatenation

  JavaScript

  •

  MIT License

  •0•5•5•1•Updated Mar 12, 2026Mar 12, 2026

• proposal-iterator-includes

  Public
  Array.prototype.includes but for iterators

  JavaScript

  •1•10•1•0•Updated Mar 12, 2026Mar 12, 2026

• proposal-enum

  Public
  Proposal for ECMAScript enums

  HTML

  •

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

  •9•483•11•3•Updated Mar 12, 2026Mar 12, 2026