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 This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.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

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

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
  1. 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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