ECMAScript proposals

• Stage 1 Proposals
• Stage 0 Proposals
• Finished Proposals
• Inactive 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 This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.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	✅	May 2017
Private instance methods and accessors	Daniel Ehrenberg	Daniel Ehrenberg Kevin Gibbons	✅	September 2020
Class Public Instance Fields & Private Instance Fields	Daniel Ehrenberg Kevin Gibbons	Daniel Ehrenberg Jeff Morrison Kevin Smith Kevin Gibbons	✅	September 2020
Static class fields and private static methods	Daniel Ehrenberg Kevin Gibbons Jeff Morrison Kevin Smith	Shu-Yu Guo Daniel Ehrenberg	✅	September 2020
Hashbang Grammar	Bradley Farias	Bradley Farias	✅	November 2018
Top-level await	Myles Borins	Myles Borins	✅	June 2019
RegExp Match Indices	Ron Buckton	Ron Buckton	✅	December 2019
Atomics.waitAsync	Lars Hansen	Shu-yu Guo Lars Hansen	✅	December 2019
.at()	Shu-yu Guo Tab Atkins	Shu-yu Guo Tab Atkins	✅	November 2020
Import Assertions	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	❓	September 2020

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	September 2020
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
Realms	Caridy Patiño Jean-Francois Paradis	Dave Herman Mark Miller Caridy Patiño	June 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	September 2020
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
Ergonomic brand checks for Private Fields	Jordan Harband	Jordan Harband	September 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	September 2020
Record & Tuple	Robin Ricard Richard Button	Robin Ricard Richard Button	September 2020
JSON.parse source text access	Richard Gibson	Richard Gibson	July 2020
Class Static Block	Ron Buckton	Ron Buckton	September 2020
Resizable and growable ArrayBuffers	Shu-yu Guo	Shu-yu Guo	September 2020
Error Cause	Chengzhong Wu	Chengzhong Wu Hemanth HM	November 2020

✅ 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.

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!).