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    • proposal-first-class-protocols

      Public
      a proposal to bring protocol-based interfaces to ECMAScript users
      JavaScript
      MIT License
      8366190Updated Mar 3, 2026Mar 3, 2026
    • ecma426

      Public
      Source map specification, RFCs and new proposals.
      JavaScript
      Other
      261766210Updated Mar 3, 2026Mar 3, 2026
    • agendas

      Public
      TC39 meeting agendas
      JavaScript
      2011.2k02Updated Mar 3, 2026Mar 3, 2026
    • HTML
      MIT License
      25344Updated Mar 3, 2026Mar 3, 2026
    • proposal-temporal

      Public
      Provides standard objects and functions for working with dates and times.
      HTML
      Other
      1733.7k164Updated Mar 3, 2026Mar 3, 2026
    • test262

      Public
      Official ECMAScript Conformance Test Suite
      JavaScript
      Other
      5282.7k21188Updated Mar 3, 2026Mar 3, 2026
    • proposal-import-text

      Public
      A TC39 proposal for importing text
      02841Updated Mar 3, 2026Mar 3, 2026
    • JavaScript
      MIT License
      2330Updated Mar 3, 2026Mar 3, 2026
    • dataset

      Public
      The automatic track tc39 proposals
      TypeScript
      The Unlicense
      114720Updated Mar 3, 2026Mar 3, 2026
    • proposal-thenable-curtailment

      Public
      A proposal to curtail the power of "thenable" objects.
      MIT License
      01260Updated Mar 2, 2026Mar 2, 2026
    • tc39.github.io

      Public
      Get involved in specifying JavaScript
      HTML
      MIT License
      61331282Updated Mar 2, 2026Mar 2, 2026
    • notes

      Public
      TC39 meeting notes
      JavaScript
      125699115Updated Mar 2, 2026Mar 2, 2026
    • proposals

      Public
      Tracking ECMAScript Proposals
      74119k33Updated Mar 2, 2026Mar 2, 2026
    • proposal-json-parseimmutable

      Public
      JSON.parseImmutable for creating Records and Tuples from JSON strings
      HTML
      MIT License
      24230Updated Mar 2, 2026Mar 2, 2026
    • proposal-amount

      Public
      Numbers with precision and a unit for JavaScript
      HTML
      MIT License
      845345Updated Mar 2, 2026Mar 2, 2026
    • proposal-intl-unit-protocol

      Public
      TC39 proposal for adding units to format functions
      JavaScript
      MIT License
      0640Updated Mar 2, 2026Mar 2, 2026
    • ecma262

      Public
      Status, process, and documents for ECMA-262
      HTML
      Other
      1.4k16k356116Updated Feb 27, 2026Feb 27, 2026
    • test262-harness

      Public
      Experimental harness for test262
      JavaScript
      BSD 3-Clause "New" or "Revised" License
      4794148Updated Feb 26, 2026Feb 26, 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
      9661Updated Feb 25, 2026Feb 25, 2026
    • proposal-typedarray-findwithin

      Public
      A proposal for searching for a subsequence within a TypedArray
      JavaScript
      MIT License
      0770Updated Feb 24, 2026Feb 24, 2026
    • proposal-typedarray-concat

      Public
      A proposal for optimizable TypedArray concatenation
      JavaScript
      MIT License
      0270Updated Feb 24, 2026Feb 24, 2026
    • MIT License
      55172Updated Feb 23, 2026Feb 23, 2026
    • ecmarkup

      Public
      An HTML superset/Markdown subset source format for ECMAScript and related specifications
      TypeScript
      MIT License
      7423710113Updated Feb 22, 2026Feb 22, 2026
    • ecma402

      Public
      Status, process, and documents for ECMA 402
      HTML
      Other
      1145951607Updated Feb 19, 2026Feb 19, 2026
    • tg5

      Public
      TC39-TG5: Experiments in programming language standardization. https://ecma-international.org/task-groups/tc39-tg5/
      326280Updated Feb 18, 2026Feb 18, 2026
    • proposal-decimal

      Public
      Built-in exact decimal numbers for JavaScript
      HTML
      18606540Updated Feb 12, 2026Feb 12, 2026
    • proposal-defer-import-eval

      Public
      A proposal for introducing a way to defer evaluate of a module
      HTML
      MIT License
      2130463Updated Feb 12, 2026Feb 12, 2026
    • Documentation of how TC39 operates and how to participate
      29216239Updated Feb 12, 2026Feb 12, 2026
    • proposal-async-context

      Public
      Async Context for JavaScript
      HTML
      Creative Commons Zero v1.0 Universal
      26826238Updated Feb 11, 2026Feb 11, 2026
    • proposal-import-bytes

      Public
      A modest proposal for importing bytes in javascript
      JavaScript
      MIT License
      57420Updated Feb 9, 2026Feb 9, 2026