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@tc39 Ecma TC39

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    329 repositories

    • agendas

      Public
      TC39 meeting agendas
      JavaScript
      •200•1.2k•0•3•Updated Jul 8, 2026Jul 8, 2026

    • dataset

      Public
      The automatic track tc39 proposals
      tc39
      tc39
      TypeScript
      •
      The Unlicense
      •12•47•2•0•Updated Jul 8, 2026Jul 8, 2026

    • test262

      Public
      Official ECMAScript Conformance Test Suite
      javascriptjstests
      javascriptjsteststc39
      JavaScript
      •
      Other
      •545•2.8k•216•108•Updated Jul 7, 2026Jul 7, 2026

    • ecma402

      Public
      Status, process, and documents for ECMA 402
      HTML
      •
      Other
      •119•604•170•18•Updated Jul 7, 2026Jul 7, 2026

    • ecma426

      Public
      Source map specification, RFCs and new proposals.
      JavaScript
      •
      Other
      •30•185•73•9•Updated Jul 7, 2026Jul 7, 2026

    • ecma262

      Public
      Status, process, and documents for ECMA-262
      javascriptecmascript
      javascriptecmascript
      HTML
      •
      Other
      •1.4k•16k•351•120•Updated Jul 7, 2026Jul 7, 2026

    • ecmarkup

      Public
      An HTML superset/Markdown subset source format for ECMAScript and related specifications
      TypeScript
      •
      MIT License
      •77•241•99•14•Updated Jul 7, 2026Jul 7, 2026

    • 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 cale…
      HTML
      •
      MIT License
      •15•61•1•0•Updated Jul 6, 2026Jul 6, 2026

    • proposal-iterator-chunking

      Public
      a proposal to add a method to iterators for producing an iterator of its subsequences
      JavaScript
      •2•100•0•0•Updated Jul 6, 2026Jul 6, 2026

    • proposals

      Public
      Tracking ECMAScript Proposals
      javascriptlanguageproposal
      javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee
      749•19k•4•7•Updated Jul 6, 2026Jul 6, 2026

    • speccy

      Public
      Speccy - ECMAScript spec character picker
      TypeScript
      •
      MIT License
      •0•0•0•0•Updated Jul 3, 2026Jul 3, 2026

    • proposal-amount

      Public
      Numbers with precision and a unit for JavaScript
      javascriptunits-of-measurenumbers
      javascriptunits-of-measurenumbersaccuracymeasurementsprecision
      HTML
      •
      MIT License
      •12•53•44•3•Updated Jul 2, 2026Jul 2, 2026

    • tc39.github.io

      Public
      Get involved in specifying JavaScript
      HTML
      •
      MIT License
      •63•334•27•5•Updated Jul 1, 2026Jul 1, 2026

    • proposal-decimal

      Public
      Built-in exact decimal numbers for JavaScript
      javascriptarithmeticdecimal
      javascriptarithmeticdecimalieee754decimal128
      HTML
      •19•628•54•0•Updated Jun 30, 2026Jun 30, 2026

    • proposal-deferred-reexports

      Public
      MIT License
      •6•56•8•3•Updated Jun 30, 2026Jun 30, 2026

    • proposal-Declarations-in-Conditionals

      Public
      JavaScript
      •3•188•5•0•Updated Jun 29, 2026Jun 29, 2026

    • proposal-await-dictionary

      Public
      A proposal to add Promise.allKeyed to ECMAScript
      JavaScript
      •
      MIT License
      •10•135•5•0•Updated Jun 25, 2026Jun 25, 2026

    • notes

      Public
      TC39 meeting notes
      JavaScript
      •127•710•1•7•Updated Jun 25, 2026Jun 25, 2026

    • proposal-decorators

      Public
      Decorators for ES6 classes
      117•3k•48•6•Updated Jun 23, 2026Jun 23, 2026

    • proposal-thenable-curtailment

      Public
      A proposal to curtail the power of "thenable" objects.
      MIT License
      •2•16•4•0•Updated Jun 23, 2026Jun 23, 2026

    • proposal-error-code-property

      Public
      JavaScript
      •
      MIT License
      •1•17•2•0•Updated Jun 23, 2026Jun 23, 2026

    • eshost

      Public
      A uniform wrapper around a multitude of ECMAScript hosts. CLI: https://github.com/bterlson/eshost-cli
      JavaScript
      •
      Other
      •45•146•12•1•Updated Jun 23, 2026Jun 23, 2026

    • how-we-work

      Public
      Documentation of how TC39 operates and how to participate
      30•220•23•11•Updated Jun 18, 2026Jun 18, 2026

    • proposal-json-parseimmutable

      Public
      JSON.parseImmutable for creating Records and Tuples from JSON strings
      HTML
      •
      MIT License
      •3•46•4•0•Updated Jun 17, 2026Jun 17, 2026

    • proposal-async-context

      Public
      Async Context for JavaScript
      javascript
      javascript
      HTML
      •
      Creative Commons Zero v1.0 Universal
      •28•861•23•8•Updated Jun 16, 2026Jun 16, 2026

    • proposal-comparisons

      Public
      ECMAScript Proposal, specs, and reference implementation for comparisons
      MIT License
      •1•18•0•2•Updated Jun 11, 2026Jun 11, 2026

    • proposal-atomics-microwait

      Public
      Micro waits in JS
      HTML
      •
      Other
      •2•63•5•1•Updated Jun 2, 2026Jun 2, 2026

    • proposal-iterator-includes

      Public
      Array.prototype.includes but for iterators
      JavaScript
      •2•11•0•0•Updated May 29, 2026May 29, 2026

    • proposal-joint-iteration

      Public archive
      a TC39 proposal to synchronise the advancement of multiple iterators
      TypeScript
      •6•117•1•1•Updated May 29, 2026May 29, 2026

    • proposal-stable-formatting

      Public
      A TC-39 proposal to bring stable Intl-inspired formatting options to ECMAScript
      HTML
      •3•17•14•2•Updated May 27, 2026May 27, 2026
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