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@tc39 Ecma TC39

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    335 repositories

    • ecma262

      Public
      Status, process, and documents for ECMA-262
      javascriptecmascript
      javascriptecmascript
      HTML
      •
      Other
      •1.4k•16k•356•124•Updated Aug 10, 2026Aug 10, 2026

    • dataset

      Public
      The automatic track tc39 proposals
      tc39
      tc39
      TypeScript
      •
      The Unlicense
      •12•48•2•0•Updated Aug 10, 2026Aug 10, 2026

    • proposal-iterator-includes

      Public
      Array.prototype.includes but for iterators
      JavaScript
      •3•11•1•0•Updated Aug 8, 2026Aug 8, 2026

    • proposal-amount

      Public
      Numbers with precision and a unit for JavaScript
      javascriptunits-of-measurenumbers
      javascriptunits-of-measurenumbersaccuracymeasurementsprecision
      HTML
      •
      MIT License
      •12•54•49•4•Updated Aug 8, 2026Aug 8, 2026

    • proposal-iterator-join

      Public
      JS proposal for a means to concatenate the contents of an iterator into a string
      JavaScript
      •
      MIT License
      •2•13•1•0•Updated Aug 8, 2026Aug 8, 2026

    • proposal-composites

      Public
      TypeScript
      •
      MIT License
      •7•281•25•0•Updated Aug 7, 2026Aug 7, 2026

    • tg5

      Public
      TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/
      5•26•28•0•Updated Aug 7, 2026Aug 7, 2026

    • notes

      Public
      TC39 meeting notes
      JavaScript
      •130•714•1•6•Updated Aug 7, 2026Aug 7, 2026

    • tc39.github.io

      Public
      Get involved in specifying JavaScript
      HTML
      •
      MIT License
      •62•335•27•5•Updated Aug 7, 2026Aug 7, 2026

    • ecma426

      Public
      Source map specification, RFCs and new proposals.
      JavaScript
      •
      Other
      •31•185•74•9•Updated Aug 7, 2026Aug 7, 2026

    • ecma402

      Public
      Status, process, and documents for ECMA 402
      HTML
      •
      Other
      •119•607•168•15•Updated Aug 7, 2026Aug 7, 2026

    • test262

      Public
      Official ECMAScript Conformance Test Suite
      javascriptjstests
      javascriptjsteststc39
      JavaScript
      •
      Other
      •551•2.8k•209•102•Updated Aug 7, 2026Aug 7, 2026

    • speccy

      Public
      Speccy - ECMAScript spec character picker
      TypeScript
      •
      MIT License
      •0•0•0•0•Updated Aug 7, 2026Aug 7, 2026

    • proposal-json-parseimmutable

      Public
      JSON.parseImmutable for creating Records and Tuples from JSON strings
      HTML
      •
      MIT License
      •3•46•4•1•Updated Aug 5, 2026Aug 5, 2026

    • eshost

      Public
      A uniform wrapper around a multitude of ECMAScript hosts. CLI: https://github.com/bterlson/eshost-cli
      JavaScript
      •
      Other
      •45•146•12•2•Updated Aug 5, 2026Aug 5, 2026

    • proposals

      Public
      Tracking ECMAScript Proposals
      javascriptlanguageproposal
      javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee
      750•19k•4•5•Updated Aug 4, 2026Aug 4, 2026

    • agendas

      Public
      TC39 meeting agendas
      JavaScript
      •200•1.2k•1•3•Updated Aug 3, 2026Aug 3, 2026

    • proposal-export-star-default

      Public
      Proposal to include default export in `export * from 'module'`
      JavaScript
      •
      MIT License
      •0•12•2•0•Updated Aug 1, 2026Aug 1, 2026

    • proposal-deferred-reexports

      Public
      MIT License
      •6•57•10•3•Updated Jul 30, 2026Jul 30, 2026

    • proposal-temporal

      Public
      Provides standard objects and functions for working with dates and times.
      HTML
      •
      Other
      •177•3.7k•20•5•Updated Jul 27, 2026Jul 27, 2026

    • proposal-Map-getAndDelete

      Public
      JavaScript
      •
      MIT License
      •0•7•2•0•Updated Jul 27, 2026Jul 27, 2026

    • proposal-private-declarations

      Public
      A proposal to allow trusted code _outside_ of the class lexical scope to access private state
      HTML
      •
      MIT License
      •2•26•13•1•Updated Jul 24, 2026Jul 24, 2026

    • proposal-fma

      Public
      Fused Multiply Add
      JavaScript
      •
      MIT License
      •1•6•3•0•Updated Jul 24, 2026Jul 24, 2026

    • proposal-intl-datetime-alignment

      Public
      A TC39 proposal to align Intl.DateTimeFormat options with other standards
      0•1•3•0•Updated Jul 24, 2026Jul 24, 2026

    • ecmarkup

      Public
      An HTML superset/Markdown subset source format for ECMAScript and related specifications
      TypeScript
      •
      MIT License
      •77•241•100•16•Updated Jul 23, 2026Jul 23, 2026

    • proposal-error-code-property

      Public
      JavaScript
      •
      MIT License
      •1•36•4•0•Updated Jul 22, 2026Jul 22, 2026

    • proposal-thenable-curtailment

      Public
      A proposal to curtail the power of "thenable" objects.
      MIT License
      •2•16•5•0•Updated Jul 22, 2026Jul 22, 2026

    • proposal-await-dictionary

      Public
      A proposal to add Promise.allKeyed to ECMAScript
      JavaScript
      •
      MIT License
      •10•162•2•0•Updated Jul 21, 2026Jul 21, 2026

    • proposal-defer-import-eval

      Public
      A proposal for introducing a way to defer evaluate of a module
      HTML
      •
      MIT License
      •22•316•8•2•Updated Jul 21, 2026Jul 21, 2026

    • proposal-bigint-from-exponential

      Public
      A TC39 proposal for creating bigints from exponential-notation strings
      JavaScript
      •
      MIT License
      •0•0•3•0•Updated Jul 20, 2026Jul 20, 2026
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