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@tc39 Ecma TC39

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    322 repositories

    • dataset

      Public
      The automatic track tc39 proposals
      tc39
      TypeScript
      •
      The Unlicense
      •11•46•2•0•Updated Feb 5, 2026Feb 5, 2026

    • agendas

      Public
      TC39 meeting agendas
      JavaScript
      •200•1.2k•0•2•Updated Feb 4, 2026Feb 4, 2026

    • proposal-temporal

      Public
      Provides standard objects and functions for working with dates and times.
      HTML
      •
      Other
      •172•3.7k•23•9•Updated Feb 4, 2026Feb 4, 2026

    • proposal-typedarray-findwithin

      Public
      A proposal for searching for a subsequence within a TypedArray
      JavaScript
      •
      MIT License
      •0•7•6•1•Updated Feb 4, 2026Feb 4, 2026

    • test262

      Public
      Official ECMAScript Conformance Test Suite
      javascriptjsteststc39
      JavaScript
      •
      Other
      •523•2.7k•209•73•Updated Feb 4, 2026Feb 4, 2026

    • proposals

      Public
      Tracking ECMAScript Proposals
      javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee
      741•19k•3•2•Updated Feb 4, 2026Feb 4, 2026

    • proposal-typedarray-concat

      Public
      A proposal for optimizable TypedArray concatenation
      JavaScript
      •
      MIT License
      •0•2•6•1•Updated Feb 4, 2026Feb 4, 2026

    • tc39.github.io

      Public
      Get involved in specifying JavaScript
      HTML
      •
      MIT License
      •61•332•28•2•Updated Feb 3, 2026Feb 3, 2026

    • proposal-async-context

      Public
      Async Context for JavaScript
      javascript
      HTML
      •
      Creative Commons Zero v1.0 Universal
      •25•816•23•6•Updated Feb 3, 2026Feb 3, 2026

    • ecma262

      Public
      Status, process, and documents for ECMA-262
      javascriptecmascript
      HTML
      •
      Other
      •1.4k•16k•358•117•Updated Feb 3, 2026Feb 3, 2026

    • proposal-import-bytes

      Public
      A modest proposal for importing bytes in javascript
      JavaScript
      •
      MIT License
      •5•72•3•1•Updated Feb 1, 2026Feb 1, 2026

    • ecmarkup

      Public
      An HTML superset/Markdown subset source format for ECMAScript and related specifications
      HTML
      •
      MIT License
      •74•236•99•13•Updated Feb 1, 2026Feb 1, 2026

    • notes

      Public
      TC39 meeting notes
      JavaScript
      •125•700•1•9•Updated Jan 30, 2026Jan 30, 2026

    • faq

      Public
      0•72•1•0•Updated Jan 30, 2026Jan 30, 2026

    • ecma426

      Public
      Source map specification, RFCs and new proposals.
      JavaScript
      •
      Other
      •25•175•62•8•Updated Jan 29, 2026Jan 29, 2026

    • proposal-deferred-reexports

      Public
      MIT License
      •5•45•7•3•Updated Jan 29, 2026Jan 29, 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
      •8•6•9•0•Updated Jan 28, 2026Jan 28, 2026

    • proposal-signals

      Public
      A proposal to add signals to JavaScript.
      MIT License
      •71•4.1k•100•8•Updated Jan 25, 2026Jan 25, 2026

    • test262-harness

      Public
      Experimental harness for test262
      JavaScript
      •
      BSD 3-Clause "New" or "Revised" License
      •47•92•14•5•Updated Jan 24, 2026Jan 24, 2026

    • proposal-smart-unit-preferences

      Public
      HTML
      •
      MIT License
      •6•25•5•0•Updated Jan 23, 2026Jan 23, 2026

    • ecma402

      Public
      Status, process, and documents for ECMA 402
      HTML
      •
      Other
      •114•595•158•9•Updated Jan 23, 2026Jan 23, 2026

    • proposal-composable-accessors

      Public
      Incrementally add functionality to accessors via built-in decorators
      1•7•0•1•Updated Jan 23, 2026Jan 23, 2026

    • proposal-alias-accessors

      Public
      0•8•0•0•Updated Jan 23, 2026Jan 23, 2026

    • proposal-regexp-atomic-operators

      Public
      JavaScript
      •
      BSD 3-Clause "New" or "Revised" License
      •1•21•5•0•Updated Jan 22, 2026Jan 22, 2026

    • proposal-error-limit-option

      Public
      ECMAScript Proposal: Error option `limit`
      HTML
      •
      MIT License
      •0•7•1•0•Updated Jan 21, 2026Jan 21, 2026

    • proposal-error-frames-above

      Public
      ECMAScript Proposal: Error option `framesAbove`
      HTML
      •
      MIT License
      •0•6•3•0•Updated Jan 21, 2026Jan 21, 2026

    • tg5

      Public
      TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/
      3•26•28•0•Updated Jan 20, 2026Jan 20, 2026

    • proposal-error-capturestacktrace

      Public
      Standardizing Error.captureStackTrace
      MIT License
      •4•13•5•0•Updated Jan 20, 2026Jan 20, 2026

    • proposal-import-sync

      Public
      MIT License
      •2•56•7•0•Updated Jan 20, 2026Jan 20, 2026

    • proposal-intl-unit-format

      Public archive
      `Intl.UnitFormat` specification [draft]
      HTML
      •3•10•5•0•Updated Jan 20, 2026Jan 20, 2026