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@tc39 Ecma TC39

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    317 repositories

    • test262

      Public
      Official ECMAScript Conformance Test Suite
      javascriptjsteststc39
      JavaScript
      •
      Other
      •516•2.6k•208•68•Updated Dec 19, 2025Dec 19, 2025

    • dataset

      Public
      The automatic track tc39 proposals
      tc39
      TypeScript
      •
      The Unlicense
      •11•45•2•0•Updated Dec 19, 2025Dec 19, 2025

    • ecma262

      Public
      Status, process, and documents for ECMA-262
      javascriptecmascript
      HTML
      •
      Other
      •1.4k•16k•353•115•Updated Dec 18, 2025Dec 18, 2025

    • proposal-async-context

      Public
      Async Context for JavaScript
      javascript
      HTML
      •
      Creative Commons Zero v1.0 Universal
      •24•795•23•5•Updated Dec 18, 2025Dec 18, 2025

    • tc39.github.io

      Public
      Get involved in specifying JavaScript
      HTML
      •
      MIT License
      •61•331•27•2•Updated Dec 17, 2025Dec 17, 2025

    • proposal-object-symbols

      Public
      MIT License
      •0•1•1•1•Updated Dec 17, 2025Dec 17, 2025

    • proposal-deferred-reexports

      Public
      MIT License
      •4•44•5•1•Updated Dec 16, 2025Dec 16, 2025

    • proposal-temporal

      Public
      Provides standard objects and functions for working with dates and times.
      HTML
      •
      Other
      •170•3.6k•27•14•Updated Dec 12, 2025Dec 12, 2025

    • ecma404

      Public archive
      Status, process, and documents for ECMA 404
      HTML
      •0•2•0•0•Updated Dec 12, 2025Dec 12, 2025

    • proposals

      Public
      Tracking ECMAScript Proposals
      javascriptlanguageproposalecmascriptspecspecificationlanguage-designcommittee
      737•19k•7•3•Updated Dec 10, 2025Dec 10, 2025

    • ecma402

      Public
      Status, process, and documents for ECMA 402
      HTML
      •
      Other
      •114•592•157•10•Updated Dec 9, 2025Dec 9, 2025

    • proposal-iterator-sequencing

      Public
      a TC39 proposal to create iterators by sequencing existing iterators
      JavaScript
      •6•84•0•0•Updated Dec 8, 2025Dec 8, 2025

    • proposal-iterator-join

      Public
      JS proposal for a means to concatenate the contents of an iterator into a string
      JavaScript
      •
      MIT License
      •0•8•0•0•Updated Dec 8, 2025Dec 8, 2025

    • how-we-work

      Public
      Documentation of how TC39 operates and how to participate
      29•216•23•10•Updated Dec 5, 2025Dec 5, 2025

    • ecma426

      Public
      Source map specification, RFCs and new proposals.
      JavaScript
      •
      Other
      •22•173•62•8•Updated Dec 3, 2025Dec 3, 2025

    • proposal-nonextensible-applies-to-private

      Public
      Proposal to disallow adding new private fields to non-extensible objects
      JavaScript
      •
      MIT License
      •1•9•4•0•Updated Nov 27, 2025Nov 27, 2025

    • proposal-concurrency-control

      Public
      interfaces and data structures for concurrency control and integration into async iterator helpers
      TypeScript
      •0•41•12•1•Updated Nov 26, 2025Nov 26, 2025

    • proposal-json-parse-with-source

      Public
      Proposal for extending JSON.parse to expose input source text.
      HTML
      •
      MIT License
      •9•254•0•0•Updated Nov 23, 2025Nov 23, 2025

    • proposal-import-text

      Public
      A TC39 proposal for importing text
      0•19•4•0•Updated Nov 22, 2025Nov 22, 2025

    • 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•4•17•7•Updated Nov 22, 2025Nov 22, 2025

    • agendas

      Public
      TC39 meeting agendas
      JavaScript
      •198•1.2k•0•3•Updated Nov 19, 2025Nov 19, 2025

    • proposal-object-keys-length

      Public
      `Object.keysLength`: a way to count own enumerable string keys without making an array first
      JavaScript
      •
      MIT License
      •0•10•2•0•Updated Nov 19, 2025Nov 19, 2025

    • proposal-object-property-count

      Public
      TC39 proposal for Object.propertyCount(target[, options])
      MIT License
      •2•37•3•0•Updated Nov 19, 2025Nov 19, 2025

    • tg5

      Public
      TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/
      3•26•28•0•Updated Nov 19, 2025Nov 19, 2025

    • proposal-typedarray-findwithin

      Public
      A proposal for searching for a subsequence within a TypedArray
      JavaScript
      •
      MIT License
      •0•3•4•0•Updated Nov 18, 2025Nov 18, 2025

    • proposal-typedarray-concat

      Public
      A proposal for optimizable TypedArray concatenation
      JavaScript
      •
      MIT License
      •0•1•5•0•Updated Nov 18, 2025Nov 18, 2025

    • 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 calendar, etc.
      HTML
      •
      MIT License
      •15•61•0•0•Updated Nov 18, 2025Nov 18, 2025

    • proposal-await-dictionary

      Public
      A proposal to add Promise.allKeyed to ECMAScript
      JavaScript
      •
      MIT License
      •8•122•5•0•Updated Nov 18, 2025Nov 18, 2025

    • proposal-error-stack-accessor

      Public
      ECMAScript Proposal, specs, and reference implementation for Error.prototype.stack accessor
      MIT License
      •2•19•3•0•Updated Nov 18, 2025Nov 18, 2025

    • proposal-error-capturestacktrace

      Public
      Standardizing Error.captureStackTrace
      MIT License
      •3•11•5•0•Updated Nov 18, 2025Nov 18, 2025