philpuglisi / proposals

Tracking ECMAScript Proposals

ECMAScript 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 This list contains only stage 1 proposals and higher that have not yet been withdrawn/rejected, or become finished.

Stage 3

🚀	Proposal	Author	Champion	Tests	Last Presented
	globalThis	Jordan Harband	Jordan Harband	✅	November 2018
	import()	Domenic Denicola	Domenic Denicola	✅	November 2016
	Legacy RegExp features in JavaScript	Claude Pache	Mark Miller Claude Pache	✅	May 2017
	BigInt	Daniel Ehrenberg	Daniel Ehrenberg	✅	May 2018
	import.meta	Domenic Denicola	Domenic Denicola	✅	September 2017
	Private instance methods and accessors	Daniel Ehrenberg	Daniel Ehrenberg Kevin Gibbons	❓	September 2018
	Class Public Instance Fields & Private Instance Fields	Daniel Ehrenberg Kevin Gibbons	Daniel Ehrenberg Jeff Morrison Kevin Smith Kevin Gibbons	❓	September 2018
	Static class fields and private static methods	Daniel Ehrenberg Kevin Gibbons Jeff Morrison Kevin Smith	Shu-Yu Guo Daniel Ehrenberg		May 2018
	String.prototype.matchAll	Jordan Harband	Jordan Harband	✅	September 2018
	Hashbang Grammar	Bradley Farias	Bradley Farias	🚧	November 2018

Stage 2

🚀	Proposal	Author	Champion	Last Presented
	Numeric separators	Sam Goto Rick Waldron	Sam Goto Rick Waldron	May 2018
	function.sent metaproperty	Allen Wirfs-Brock	Allen Wirfs-Brock	November 2015
	Decorators	Daniel Ehrenberg	Yehuda Katz Brian Terlson Daniel Ehrenberg	November 2018
🚀	throw expressions	Ron Buckton	Ron Buckton	January 2018
	Atomics.waitAsync	Lars Hansen	Shu-yu Guo Lars Hansen	September 2017
	WeakRefs	Dean Tribble	Dean Tribble	March 2018
	Top-level await	Myles Borins	Myles Borins	May 2018
	Function.prototype.toString() censorship	Domenic Denicola	Domenic Denicola	May 2018
	New Set methods	Michał Wadas Sathya Gunasekaran	Sathya Gunasekaran	May 2018
	Realms	Caridy Patiño Jean-Francois Paradis	Dave Herman Mark Miller Caridy Patiño	May 2018
	ArrayBuffer.prototype.transfer	Domenic Denicola	Domenic Denicola	July 2018
	RegExp Match array offsets	Ron Buckton	Ron Buckton	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
	Promise.allSettled	Jason Williams Robert Pamely	Mathias Bynens	January 2019
	collection normalization	Bradley Farias	Bradley Farias	January 2019

Stage 1

🚀	Proposal	Author	Champion	Last Presented
	export v from "mod"; statements	Lee Byron	Ben Newman John-David Dalton	July 2017
	Observable	Jafar Husain	Jafar Husain Mark Miller	May 2017
	Frozen Realms	Mark Miller Chip Morningstar Caridy Patiño	Mark Miller Chip Morningstar Caridy Patiño	March 2018
	Math Extensions	Rick Waldron	Rick Waldron	July 2016
	of and from on collection constructors	Leo Balter	Leo Balter	September 2016
	Generator arrow functions (=>*)		Brendan Eich Domenic Denicola	September 2016
	Promise.try	Jordan Harband	Jordan Harband	November 2016
	Optional Chaining	Gabriel Isenberg Claude Pache Dustin Savery	Gabriel Isenberg Dustin Savery	November 2018
	Math.signbit: IEEE-754 sign bit	JF Bastien	JF Bastien	May 2017
	Error stacks	Jordan Harband	Jordan Harband	January 2017
	do expressions	Dave Herman	Dave Herman	July 2018
	Float16 on TypedArrays, DataView, Math.hfround	Leo Balter	Leo Balter	May 2017
	Change Number.parseInt/parseFloat to not coerce null/undefined/NaN (repo link TBD)		Brendan Eich	July 2017
	Binary AST	Shu-yu Guo	Shu-yu Guo	May 2018
	Pipeline Operator	Daniel Ehrenberg	Daniel Ehrenberg	March 2018
	Extensible numeric literals	Daniel Ehrenberg	Daniel Ehrenberg	September 2017
	First-class protocols	Michael Ficarra	Michael Ficarra	July 2018
	Nullish coalescing Operator	Gabriel Isenberg	Gabriel Isenberg	March 2018
	Partial application	Ron Buckton	Ron Buckton	July 2018
	Cancellation API	Ron Buckton	Ron Buckton Brian Terlson	July 2018
	String.prototype.replaceAll	Peter Marshall Jakob Gruber Mathias Bynens	Mathias Bynens	November 2017
	String.prototype.codePoints	Ingvar Stepanyan	Mathias Bynens	May 2018
	Object.freeze + Object.seal syntax	Keith Cirkel	Keith Cirkel	November 2017
	Block Params	Sam Goto	Sam Goto	November 2017
	{BigInt,Number}.fromString	Mathias Bynens	Mathias Bynens	January 2018
	Math.seededRandoms()	Tab Atkins	Tab Atkins	January 2018
	Maximally minimal mixins	Justin Fagnani	Justin Fagnani	January 2018
	Getting last element of Array	Keith Cirkel	Keith Cirkel	January 2018
	Collection methods	Michał Wadas	Sathya Gunasekaran	January 2018
🚀	Richer Keys	Bradley Farias	Bradley Farias	March 2018
	Slice notation	Sathya Gunasekaran	Sathya Gunasekaran	March 2018
	Logical Assignment Operators	Justin Ridgewell	Justin Ridgewell	March 2018
	Module Keys	Mike Samuel	Mike Samuel	May 2018
	Class Static Block	Ron Buckton	Ron Buckton	May 2018
	class Access Expressions	Ron Buckton	Ron Buckton	May 2018
	Pattern Matching	Kat Marchán Brian Terlson	Kat Marchán Brian Terlson Sebastian Markbåge	May 2018
	Explicit Resource Management	Ron Buckton	Ron Buckton	July 2018
	Dynamic Modules	Bradley Farias	Bradley Farias	July 2018
	JavaScript Standard Library	Michael Saboff Mattijs Hoitink	Michael Saboff Mattijs Hoitink	July 2018
	"use module"	Dave Herman	Dave Herman	July 2017
	for-in mechanics	Kevin Gibbons	Kevin Gibbons	September 2018
	uniform parsing of quasi-standard Date.parse input	Richard Gibson	Richard Gibson	September 2018
	JSON.parse source text access	Richard Gibson	Richard Gibson	September 2018
	IDL for ECMAScript	Daniel Ehrenberg	Daniel Ehrenberg	September 2018
	Asset References	Sebastian Markbage	Sebastian Markbage	November 2018
	Freezing prototypes	Kevin Gibbons	Kevin Gibbons	January 2019
	new.initialize	Daniel Ehrenberg	Daniel Ehrenberg	January 2019
	Iterator helpers	Gus Caplan	Domenic Denicola	January 2019

🚀 means the champion thinks it's ready to advance but has not yet presented to the committee.

✅ 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!).