jasnell / proposals

Tracking ECMAScript Proposals

ECMAScript proposals

• Stage 1 Proposals
• Stage 0 Proposals
• Finished Proposals
• Inactive Proposals

ECMAScript Internationalization API Specification proposals

Contributing new proposals

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

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 This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.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	✅	May 2017
Hashbang Grammar	Bradley Farias	Bradley Farias	✅	November 2018
Atomics.waitAsync	Lars Hansen	Shu-yu Guo Lars Hansen	✅	December 2019
Import Assertions	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	✅	November 2020
JSON Modules	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	✅	January 2021
Temporal	Philipp Dunkel Maggie Johnson-Pint Matt Johnson-Pint Brian Terlson Shane Carr Ujjwal Sharma Philip Chimento Jason Williams Justin Grant	Philipp Dunkel Maggie Johnson-Pint Matt Johnson-Pint Brian Terlson Shane Carr Ujjwal Sharma Philip Chimento Jason Williams Justin Grant	✅	March 2021
Resizable and growable ArrayBuffers	Shu-yu Guo	Shu-yu Guo	✅	May 2021
Array find from last	Wenlu Wang	Wenlu Wang Daniel Rosenwasser	✅	July 2021
ShadowRealm	Caridy Patiño Jean-Francois Paradis	Dave Herman Mark Miller Caridy Patiño Leo Balter	✅	December 2021
Array Grouping	Justin Ridgewell	Justin Ridgewell	❓	December 2021

Stage 2

Proposal	Author	Champion	Last Presented
function.sent metaproperty	Allen Wirfs-Brock	HE Shi-Jun	July 2019
Decorators	Daniel Ehrenberg	Yehuda Katz Brian Terlson Daniel Ehrenberg Chris Garrett	December 2021
throw expressions	Ron Buckton	Ron Buckton	January 2018
Function implementation hiding	Domenic Denicola Michael Ficarra	Michael Ficarra	June 2020
New Set methods	Michał Wadas Sathya Gunasekaran	Sathya Gunasekaran	January 2019
Sequence properties in Unicode property escapes	Mathias Bynens	Mathias Bynens	October 2019
collection normalization	Bradley Farias	Bradley Farias	January 2019
Array.isTemplateObject	Mike Samuel, Krzysztof Kotowicz	Krzysztof Kotowicz	December 2019
Iterator helpers	Gus Caplan	Michael Ficarra Jonathan Keslin	July 2020
Explicit Resource Management	Ron Buckton	Ron Buckton	February 2020
Map.prototype.emplace	Bradley Farias	Erica Pramer	July 2020
Dynamic Import Host Adjustment	Mike Samuel, Krzysztof Kotowicz	Krzysztof Kotowicz	December 2019
WeakRefs cleanupSome	Yulia Startsev Daniel Ehrenberg	Yulia Startsev Daniel Ehrenberg	July 2020
Record & Tuple	Robin Ricard Richard Button	Robin Ricard Richard Button	December 2021
JSON.parse source text access	Richard Gibson	Richard Gibson	July 2020
Module Blocks	Surma Daniel Ehrenberg	Surma	January 2021
Symbols as WeakMap keys	Daniel Ehrenberg Richard Button Robin Ricard Leo Balter Rick Waldron Caridy Patiño	Daniel Ehrenberg Richard Button Robin Ricard Leo Balter Rick Waldron Caridy Patiño	April 2021
Adopting Unicode behavior for set notation in regular expressions	Markus Scherer Mathias Bynens	Mathias Bynens	December 2021
Change Array by copy	Robin Ricard	Robin Ricard	August 2021
Pipeline Operator	J. S. Choi James DiGioia Ron Buckton Tab Atkins	J. S. Choi Ron Buckton Tab Atkins	August 2021
Destructure Private Fields	Justin Ridgewell	Justin Ridgewell	December 2021
Array.fromAsync	J.S. Choi	J.S. Choi	December 2021
RegExp Modifiers	Ron Buckton	Ron Buckton	December 2021
RegExp Buffer Boundaries (\A, \z, \Z)	Ron Buckton	Ron Buckton	December 2021

✅ means a pull request for tests was merged.

❓ means there is no pull request for tests yet.

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

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!).