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proposals

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tc39 /proposals

Tracking ECMAScript Proposals

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ECMAScript proposals

ECMAScript Internationalization API Specification proposals

Active proposals

Proposals follow this process document. This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished. Stage 2 indicates that the committee expects these features to be developed and eventually included in the standard.

Stage 3

| Proposal | Author | Champion | Tests | Last Presented | | ------------------------------------------------------------------------------ | ----------------------------------------------------------------------- | ----------------------------------------------------------------------- | ---------------------------------------------- | --------------------------------------------------------| | Legacy RegExp features in JavaScript | Claude Pache | Mark Miller
Claude Pache | :question: | May 2017 | | Private instance methods and accessors | Daniel Ehrenberg | Daniel Ehrenberg
Kevin Gibbons | :whitecheckmark: | January 2019 | | Class Public Instance Fields & Private Instance Fields | Daniel Ehrenberg
Kevin Gibbons | Daniel Ehrenberg
Jeff Morrison
Kevin Smith
Kevin Gibbons | :whitecheckmark: | March 2019 | | Static class fields and private static methods | Daniel Ehrenberg
Kevin Gibbons
Jeff Morrison
Kevin Smith | Shu-Yu Guo
Daniel Ehrenberg | :whitecheckmark: | January 2019 | | Hashbang Grammar | Bradley Farias | Bradley Farias | :whitecheckmark: | November 2018 | | Top-level

await
| Myles Borins | Myles Borins | :whitecheckmark: | June 2019 | | RegExp Match Indices | Ron Buckton | Ron Buckton | :whitecheckmark: | December 2019 | |
Atomics.waitAsync
| Lars Hansen | Shu-yu Guo
Lars Hansen | :whitecheckmark: | December 2019 |

Stage 2

| Proposal | Author | Champion | Last Presented | | ------------------------------------------------------------------------------ | ----------------------------------------------------- | --------------------------------------------------------------------------------- | ------------------------------------------------------------------- | |

function.sent
metaproperty | Allen Wirfs-Brock | 贺师俊 (HE Shi-Jun) | July 2019 | | Decorators | Daniel Ehrenberg | Yehuda Katz
Brian Terlson
Daniel Ehrenberg | March 2020 | |
throw
expressions
| Ron Buckton | Ron Buckton | January 2018 | | Function implementation hiding | Domenic Denicola
Michael Ficarra | Michael Ficarra | December 2019 | | New Set methods | Michał Wadas
Sathya Gunasekaran | Sathya Gunasekaran | January 2019 | | Realms | Caridy Patiño
Jean-Francois Paradis | Dave Herman
Mark Miller
Caridy Patiño | February 2020 | |
ArrayBuffer.prototype.transfer
| Domenic Denicola | Shu-yu Guo | July 2018 | | Sequence properties in Unicode property escapes | Mathias Bynens | Mathias Bynens | October 2019 | | Temporal | Maggie Pint
Matt Johnson
Philipp Dunkel | Maggie Pint
Philipp Dunkel
Brian Terlson | March 2020 | | collection normalization | Bradley Farias | Bradley Farias | January 2019 | | Array.isTemplateObject | Mike Samuel | Mike Samuel | December 2019 | | Iterator helpers | Gus Caplan | Michael Ficarra
Jonathan Keslin | July 2019 | | Explicit Resource Management | Ron Buckton | Ron Buckton | February 2020 | |
Map.prototype.upsert
| Bradley Farias | Erica Pramer | October 2019 | | Dynamic Import Host Adjustment | Mike Samuel | Mike Samuel | December 2019 | | Ergonomic brand checks for Private Fields | Jordan Harband | Jordan Harband | June 2020 | | Import Conditions | Myles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg | Myles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg | June 2020 | | WeakRefs
cleanupSome
| Yulia Startsev
Daniel Ehrenberg | Yulia Startsev
Daniel Ehrenberg | July 2020 | | JSON Modules | Myles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg | Myles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg | July 2020 | |
.item()
| Shu-yu Guo
Tab Atkins | Shu-yu Guo
Tab Atkins | July 2020 | | Record & Tuple | Robin Ricard
Richard Button | Robin Ricard
Richard Button | July 2020 | | JSON.parse source text access | Richard Gibson | Richard Gibson | July 2020 |

:whitecheckmark: means a pull request for tests was merged.

:question: means there is no pull request for tests yet.

:construction: means a pull request for tests was created, but not merged yet.

Contributing new proposals

Please see Contributing to ECMAScript for the most up-to-date information on contributing proposals to this standard.

Onboarding existing proposals

Proposals that are Stage 1 and above must be transferred to the TC39 GitHub organization for discoverability and archival purposes. To onboard a proposal that lives outside the TC39 organization:

  1. Transfer your repository to the @tc39-transfer organization
    • if you are a TC39 delegate, but not a member of that organization, please contact @LJHarb
  2. One of the chairs (@bterlson, @gesa, @MylesBorins, or @robpalme) will transfer your repository to the TC39 organization the next chance they get.

Note that as part of the onboarding process your repository name may be normalized. Don't worry, repo redirects will continue to work as long as you never create a fork, or a new repository, with the same name - although Github Pages redirects will be broken (please update your links!).

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