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    326 repositories

    • proposal-error-stack-accessor

      Public
      ECMAScript Proposal, specs, and reference implementation for Error.prototype.stack accessor
      MIT License
      •2•27•3•0•Updated May 21, 2026May 21, 2026

    • proposals

      Public
      Tracking ECMAScript Proposals
      javascriptlanguageproposal
      javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee
      745•19k•3•3•Updated May 21, 2026May 21, 2026

    • agendas

      Public
      TC39 meeting agendas
      JavaScript
      •200•1.2k•0•3•Updated May 21, 2026May 21, 2026

    • ecma262

      Public
      Status, process, and documents for ECMA-262
      javascriptecmascript
      javascriptecmascript
      HTML
      •
      Other
      •1.4k•16k•368•134•Updated May 21, 2026May 21, 2026

    • notes

      Public
      TC39 meeting notes
      JavaScript
      •127•707•1•8•Updated May 21, 2026May 21, 2026

    • proposal-temporal

      Public
      Provides standard objects and functions for working with dates and times.
      HTML
      •
      Other
      •176•3.7k•19•6•Updated May 21, 2026May 21, 2026

    • tc39.github.io

      Public
      Get involved in specifying JavaScript
      HTML
      •
      MIT License
      •63•331•27•5•Updated May 21, 2026May 21, 2026

    • dataset

      Public
      The automatic track tc39 proposals
      tc39
      tc39
      TypeScript
      •
      The Unlicense
      •12•47•2•0•Updated May 21, 2026May 21, 2026

    • proposal-amount

      Public
      Numbers with precision and a unit for JavaScript
      javascriptunits-of-measurenumbers
      javascriptunits-of-measurenumbersaccuracymeasurementsprecision
      HTML
      •
      MIT License
      •10•48•41•1•Updated May 20, 2026May 20, 2026

    • ecma402

      Public
      Status, process, and documents for ECMA 402
      HTML
      •
      Other
      •116•601•169•12•Updated May 20, 2026May 20, 2026

    • test262

      Public
      Official ECMAScript Conformance Test Suite
      javascriptjstests
      javascriptjsteststc39
      JavaScript
      •
      Other
      •541•2.8k•212•103•Updated May 20, 2026May 20, 2026

    • proposal-stable-formatting

      Public
      A TC-39 proposal to bring stable Intl-inspired formatting options to ECMAScript
      HTML
      •3•13•14•3•Updated May 20, 2026May 20, 2026

    • proposal-thenable-curtailment

      Public
      A proposal to curtail the power of "thenable" objects.
      MIT License
      •2•14•9•0•Updated May 20, 2026May 20, 2026

    • proposal-regexp-buffer-boundaries

      Public
      Regular Expression Buffer Boundaries for ECMAScript
      HTML
      •
      BSD 3-Clause "New" or "Revised" License
      •2•11•5•1•Updated May 20, 2026May 20, 2026

    • proposal-iterator-includes

      Public
      Array.prototype.includes but for iterators
      JavaScript
      •2•10•1•0•Updated May 20, 2026May 20, 2026

    • proposal-intl-sequence-units

      Public
      Support for CLDR mixed units, like "5ft 6in"
      JavaScript
      •
      MIT License
      •0•1•5•0•Updated May 20, 2026May 20, 2026

    • tg5

      Public
      TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/
      4•26•28•0•Updated May 20, 2026May 20, 2026

    • proposal-intl-keep-trailing-zeros

      Public
      JavaScript
      •
      MIT License
      •2•3•1•0•Updated May 19, 2026May 19, 2026

    • proposal-array-is-template-object

      Public archive
      TC39 proposal to identify tagged template string array objects
      JavaScript
      •
      MIT License
      •7•49•4•1•Updated May 19, 2026May 19, 2026

    • proposal-dynamic-code-brand-checks

      Public
      TC39 proposal that enables flexible brand checks before dynamic code loading
      HTML
      •
      MIT License
      •5•51•2•0•Updated May 19, 2026May 19, 2026

    • ecma426

      Public
      Source map specification, RFCs and new proposals.
      JavaScript
      •
      Other
      •26•185•63•9•Updated May 19, 2026May 19, 2026

    • proposal-async-context

      Public
      Async Context for JavaScript
      javascript
      javascript
      HTML
      •
      Creative Commons Zero v1.0 Universal
      •28•846•23•9•Updated May 11, 2026May 11, 2026

    • ecmarkup

      Public
      An HTML superset/Markdown subset source format for ECMAScript and related specifications
      TypeScript
      •
      MIT License
      •75•241•99•17•Updated May 9, 2026May 9, 2026

    • eshost

      Public
      A uniform wrapper around a multitude of ECMAScript hosts. CLI: https://github.com/bterlson/eshost-cli
      JavaScript
      •
      Other
      •44•147•12•1•Updated May 8, 2026May 8, 2026

    • proposal-immutable-arraybuffer

      Public
      A TC39 proposal for immutable ArrayBuffers
      JavaScript
      •
      MIT License
      •6•36•6•0•Updated May 8, 2026May 8, 2026

    • proposal-deferred-reexports

      Public
      MIT License
      •6•54•7•3•Updated May 7, 2026May 7, 2026

    • faq

      Public
      1•72•1•0•Updated May 7, 2026May 7, 2026

    • proposal-upsert

      Public
      ECMAScript Proposal, specs, and reference implementation for Map.prototype.upsert
      MIT License
      •31•348•6•0•Updated May 6, 2026May 6, 2026

    • proposal-esm-phase-imports

      Public
      HTML
      •
      MIT License
      •3•53•4•4•Updated Apr 25, 2026Apr 25, 2026

    • proposal-defer-import-eval

      Public
      A proposal for introducing a way to defer evaluate of a module
      HTML
      •
      MIT License
      •21•312•7•1•Updated Apr 21, 2026Apr 21, 2026
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