ECMAScript

Proposals

• Stage 0 Proposals
• Finished Proposals
• Inactive 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 This list contains only stage 1 proposals and higher that have not yet been withdrawn/rejected, or become finished.

🚀	Proposal	Champion	Stage
	SIMD.JS - SIMD APIs	John McCutchan, Peter Jensen, Dan Gohman, Daniel Ehrenberg	3
	Function.prototype.toString revision	Michael Ficarra	3
	global	Jordan Harband	3
	Rest/Spread Properties	Sebastian Markbage	3
	Asynchronous Iteration	Domenic Denicola	3
	import()	Domenic Denicola	3
	RegExp Lookbehind Assertions	Daniel Ehrenberg	3
	RegExp Unicode Property Escapes	Brian Terlson, Daniel Ehrenberg, Mathias Bynens	3
	RegExp named capture groups	Daniel Ehrenberg, Brian Terlson	3
	s (dotAll) flag for regular expressions	Mathias Bynens, Brian Terlson	3
	function.sent metaproperty	Allen Wirfs-Brock	2
	String.prototype.{trimStart,trimEnd}	Sebastian Markbage	2
	Public Class Fields	Jeff Morrison	2
🚀	Promise.prototype.finally	Jordan Harband	2
	Class and Property Decorators	Yehuda Katz and Brian Terlson	2
🚀	Legacy RegExp features in JavaScript	Mark Miller, Claude Pache	2
	Private Fields	Daniel Ehrenberg	2
	Intl.Segmenter	Daniel Ehrenberg	2
	Arbitrary-precision Integers	Daniel Ehrenberg	2
	Date.parse fallback semantics	Morgan Phillips	1
	export * as ns from "mod"; statements	Lee Byron	1
	export v from "mod"; statements	Lee Byron	1
🚀	Observable	Jafar Husain and Mark Miller	1
	String#matchAll	Jordan Harband	1
	WeakRefs	Dean Tribble	1
	Frozen Realms	Mark S. Miller, Chip Morningstar, Caridy Patiño	1
	Math Extensions	Rick Waldron	1
	of and from on collection constructors	Leo Balter	1
	Generator arrow functions (=>*)	Brendan Eich, Domenic Denicola	1
	Promise.try	Jordan Harband	1
	Null Propagation	Gabriel Isenberg	1
	Math.signbit: IEEE-754 sign bit	JF Bastien	1
	Error stacks	Jordan Harband	1
	"do expressions"	Dave Herman	1
	Realms	Dave Herman, Mark Miller, Caridy Patiño	1
	Temporal	Maggie Pint, Brian Terlson	1

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

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 @bterlson
2. Email @bterlson at brian.terlson AT microsoft.com notifying me of the transfer (github's transfer notification is not the most obvious thing and there's only a short window to accept the transfer)
3. @bterlson will transfer your repository to the TC39 organization.

Note that as part of the onboarding process your repository name may be normalized. Don't worry, redirects will continue to work.