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 This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.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

Fx Status	Proposal	Author	Champion	Tests	Last Presented
Available	Legacy RegExp features in JavaScript	Claude Pache	Mark Miller Claude Pache	✅	May 2017
Fx81	Private instance methods and accessors	Daniel Ehrenberg	Daniel Ehrenberg Kevin Gibbons	✅	January 2019
Public - Fx66, Private, in progress	Class Public Instance Fields & Private Instance Fields	Daniel Ehrenberg Kevin Gibbons	Daniel Ehrenberg Jeff Morrison Kevin Smith Kevin Gibbons	✅	March 2019
Public - Fx75, Private - in progress	Static class fields and private static methods	Daniel Ehrenberg Kevin Gibbons Jeff Morrison Kevin Smith	Shu-Yu Guo Daniel Ehrenberg	✅	January 2019
Fx67	Hashbang Grammar	Bradley Farias	Bradley Farias	✅	November 2018
In Progress	Top-level await	Myles Borins	Myles Borins	✅	June 2019
Available	RegExp Match Indices	Ron Buckton	Ron Buckton	❓	December 2019
Available	Atomics.waitAsync	Lars Hansen	Shu-yu Guo Lars Hansen	✅	December 2019
In Progress	.item()	Shu-yu Guo Tab Atkins	Shu-yu Guo Tab Atkins	🚧	September 2020
Available	Import Assertions	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	❓	September 2020

Stage 2

Fx Status	Proposal	Author	Champion	Last Presented
awaiting team feedback	function.sent metaproperty	Allen Wirfs-Brock	HE Shi-Jun	July 2019
awaiting team feedback	Decorators	Daniel Ehrenberg	Yehuda Katz Brian Terlson Daniel Ehrenberg	January 2019
available	throw expressions	Ron Buckton	Ron Buckton	January 2018
awaiting team feedback	Function implementation hiding	Domenic Denicola Michael Ficarra	Michael Ficarra	December 2019
awaiting committee consensus	New Set methods	Michał Wadas Sathya Gunasekaran	Sathya Gunasekaran	January 2019
awaiting team feedback	Realms	Caridy Patiño Jean-Francois Paradis	Dave Herman Mark Miller Caridy Patiño	February 2020
awaiting committee consensus	ArrayBuffer.prototype.transfer	Domenic Denicola	Shu-yu Guo	July 2018
awaiting committee consensus	Sequence properties in Unicode property escapes	Mathias Bynens	Mathias Bynens	October 2019
awaiting proposal stability	Temporal	Maggie Pint Matt Johnson Philipp Dunkel	Maggie Pint Philipp Dunkel Brian Terlson	February 2020
awaiting committee consensus	collection normalization	Bradley Farias	Bradley Farias	January 2019
awaiting team feedback	Array.isTemplateObject	Mike Samuel	Mike Samuel	December 2019
In Progress	Iterator helpers	Gus Caplan	Michael Ficarra Jonathan Keslin	July 2019
awaiting committee consensus	Explicit Resource Management	Ron Buckton	Ron Buckton	February 2020
awaiting team feedback	Map.prototype.upsert	Bradley Farias	Erica Pramer	October 2019
awaiting proposal stability	Dynamic Import Host Adjustment	Mike Samuel	Mike Samuel	December 2019
In progress	Ergonomic brand checks for Private Fields	Jordan Harband	Jordan Harband	September 2020
awaiting user feedback	WeakRefs cleanupSome	Yulia Startsev Daniel Ehrenberg	Yulia Startsev Daniel Ehrenberg	July 2020
Awaiting committee consensus	JSON Modules	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg	September 2020
In progress	Record & Tuple	Robin Ricard Richard Button	Robin Ricard Richard Button	September 2020
Awaiting stage 3	JSON.parse source text access	Richard Gibson	Richard Gibson	July 2020
Awaiting stage 3	Class Static Block	Ron Buckton	Ron Buckton	September 2020
Awaiting stage 3	Resizable and growable ArrayBuffers	Shu-yu Guo	Shu-yu Guo	September 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!).