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 This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.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
globalThis	Jordan Harband	Jordan Harband	✅	November 2018
Legacy RegExp features in JavaScript	Claude Pache	Mark Miller Claude Pache	✅	May 2017
BigInt	Daniel Ehrenberg	Daniel Ehrenberg	✅	June 2019
import.meta	Domenic Denicola	Domenic Denicola	✅	September 2017
Private instance methods and accessors	Daniel Ehrenberg	Daniel Ehrenberg Kevin Gibbons	❓	January 2019
Class Public Instance Fields & Private Instance Fields	Daniel Ehrenberg Kevin Gibbons	Daniel Ehrenberg Jeff Morrison Kevin Smith Kevin Gibbons	❓	January 2019
Static class fields and private static methods	Daniel Ehrenberg Kevin Gibbons Jeff Morrison Kevin Smith	Shu-Yu Guo Daniel Ehrenberg	❓	January 2019
Hashbang Grammar	Bradley Farias	Bradley Farias	✅	November 2018
Numeric separators	Sam Goto Rick Waldron	Sam Goto Rick Waldron	✅	June 2019
Top-level await	Myles Borins	Myles Borins	❓	June 2019
WeakRefs	Dean Tribble	Dean Tribble Mark Miller Till Schneidereit	✅	June 2019
Nullish coalescing Operator	Gabriel Isenberg	Gabriel Isenberg Justin Ridgewell Daniel Rosenwasser	❓	July 2019
RegExp Match array offsets	Ron Buckton	Ron Buckton	❓	July 2019
Optional Chaining	Gabriel Isenberg Claude Pache Dustin Savery	Gabriel Isenberg Dustin Savery Justin Ridgewell Daniel Rosenwasser	❓	July 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	January 2019
throw expressions	Ron Buckton	Ron Buckton	January 2018
Atomics.waitAsync	Lars Hansen	Shu-yu Guo Lars Hansen	June 2019
Function implementation hiding	Domenic Denicola Michael Ficarra	Domenic Denicola Michael Ficarra	May 2018
New Set methods	Michał Wadas Sathya Gunasekaran	Sathya Gunasekaran	January 2019
Realms	Caridy Patiño Jean-Francois Paradis	Dave Herman Mark Miller Caridy Patiño	May 2018
ArrayBuffer.prototype.transfer	Domenic Denicola	Domenic Denicola	July 2018
Sequence properties in Unicode property escapes	Mathias Bynens	Mathias Bynens	September 2018
Temporal	Maggie Pint Matt Johnson Philipp Dunkel	Maggie Pint Philipp Dunkel Brian Terlson	September 2018
collection normalization	Bradley Farias	Bradley Farias	January 2019
String.prototype.replaceAll	Peter Marshall Jakob Gruber Mathias Bynens	Mathias Bynens	March 2019
for-in mechanics	Kevin Gibbons	Kevin Gibbons	June 2019
Array.isTemplateObject	Mike Samuel	Mike Samuel	June 2019
Promise.any	Mathias Bynens Kevin Gibbons Sergey Rubanov	Mathias Bynens	July 2019
Iterator helpers	Gus Caplan	Domenic Denicola	July 2019
Explicit Resource Management	Ron Buckton	Ron Buckton	July 2019

✅ 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 an admin in that organization, please contact @LJHarb

2. @bterlson, @gesa, or @codehag 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!).