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Tracking ECMAScript Proposals

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Delapouite/proposals

 
 

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ECMAScript proposals

ECMAScript Internationalization API Specification proposals

Contributing to proposals

Active proposals

Proposals followthis process document.This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.Stage 2 indicates that the committee expects these features to be developed and eventually included in the standard.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

ProposalAuthorChampionTest262 Feature FlagLast Presented
Legacy RegExp features in JavaScriptClaude PacheMark Miller
Claude Pache
legacy-regexpMay 2017
JSON ModulesMyles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg
Myles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg
json-modulesJanuary 2021
TemporalPhilipp Dunkel
Maggie Johnson-Pint
Matt Johnson-Pint
Brian Terlson
Shane Carr
Ujjwal Sharma
Philip Chimento
Jason Williams
Justin Grant
Philipp Dunkel
Maggie Johnson-Pint
Matt Johnson-Pint
Brian Terlson
Shane Carr
Ujjwal Sharma
Philip Chimento
Jason Williams
Justin Grant
TemporalMarch 2021
DecoratorsDaniel Ehrenberg
Kristen Hewell Garrett
Kristen Hewell GarrettdecoratorsMarch 2023
JSON.parse source text accessRichard GibsonRichard Gibsonjson-parse-with-sourceJanuary 2023
RegExp ModifiersRon BucktonRon Bucktonregexp-modifiersJune 2022
Array.fromAsyncJ.S. ChoiJ.S. ChoiArray.fromAsyncMay 2023
Sync Iterator helpersGus CaplanMichael Ficarra
Jonathan Keslin
Kevin Gibbons
iterator-helpersNovember 2022
Explicit Resource ManagementRon BucktonRon Bucktonexplicit-resource-managementMarch 2023
Float16 on TypedArrays, DataView,Math.f16roundLeo BalterLeo Balter
Kevin Gibbons
May 2023
Decorator MetadataKristen Hewell GarrettKristen Hewell GarrettMay 2023
Import AttributesMyles Borins
Sven Sauleau
Dan Clark
Daniel Ehrenberg
Sven Sauleau
Dan Clark
Daniel Ehrenberg
Nicolò Ribaudo
import-attributesMarch 2023
Source Phase ImportsLuca CasonatoGuy Bedford
Luca Casonato
July 2023
Uint8Array to/from Base64Kevin GibbonsKevin GibbonsFebruary 2024
Dynamic Code Brand ChecksNicolo RibaudoKrzysztof Kotowicz
Mike Samuel
Nicolo Ribaudo
April 2024
Redeclarable globaleval-introducedvarsShu-yu GuoShu-yu GuoApril 2024
Promise.tryJordan HarbandJordan HarbandJune 2024

Stage 2.7

ProposalAuthorChampionTest262 Feature FlagLast Presented
ShadowRealmCaridy Patiño
Jean-Francois Paradis
Dave Herman
Mark Miller
Caridy Patiño
Leo Balter
Rick Waldron
Chengzhong Wu
ShadowRealmFebruary 2024
Math.sumPreciseKevin GibbonsKevin Gibbons
RegExp.escapeDomenic Denicola
Benjamin Gruenbaum
Jordan Harband
Jordan Harband
Kevin Gibbons
June 2024
Deferring Module EvaluationYulia Startsev
Guy Bedford
Yulia Startsev
Guy Bedford
Nicolò Ribaudo
June 2024
Joint IterationMichael FicarraMichael FicarraJune 2024

Stage 2

ProposalAuthorChampionLast Presented
function.sent metapropertyAllen Wirfs-BrockHE Shi-JunJuly 2019
throw expressionsRon BucktonRon BucktonJanuary 2018
Function implementation hidingDomenic Denicola
Michael Ficarra
Michael FicarraJune 2020
collection normalizationBradley FariasBradley FariasJanuary 2019
isTemplateObjectMike Samuel, Krzysztof KotowiczDaniel Ehrenberg
Jordan Harband
December 2019
Map.prototype.emplaceBradley FariasErica PramerJuly 2020
Dynamic Import Host AdjustmentMike Samuel, Krzysztof KotowiczKrzysztof KotowiczDecember 2019
Record & TupleRobin Ricard
Richard Button
Robin Ricard
Richard Button
December 2021
Module ExpressionsSurma
Daniel Ehrenberg
Nicolò Ribaudo
Surma
Nicolò Ribaudo
November 2022
Pipeline OperatorJ. S. Choi
James DiGioia
Ron Buckton
Tab Atkins
J. S. Choi
Ron Buckton
Tab Atkins
August 2021
Destructure Private FieldsJustin RidgewellJustin RidgewellDecember 2021
RegExp Buffer Boundaries (\A,\z,\Z)Ron BucktonRon BucktonDecember 2021
String.dedentMisha Kaletsky
Hemanth HM
Justin Ridgewell
Hemanth HM
Justin Ridgewell
June 2022
JSON.parseImmutableRobin Ricard
Richard Button
Nicolò Ribaudo
Ashley Claymore
Robin Ricard
Richard Button
Nicolò Ribaudo
Ashley Claymore
July 2022
Module DeclarationsDaniel Ehrenberg
Nicolò Ribaudo
Daniel Ehrenberg
Mark Miller
Nicolò Ribaudo
November 2022
Symbol PredicatesRobin Ricard
Jordan Harband
Ashley Claymore
Jordan Harband
January 2023
Async Iterator helpersGus CaplanMichael Ficarra
Jonathan Keslin
Kevin Gibbons
January 2023
Iterator.rangeJack WorksJack WorksMarch 2023
Async ContextChengzhong WuAndreu Botella
Chengzhong Wu
Justin Ridgewell
March 2023
Time Zone CanonicalizationJustin GrantJustin Grant
Richard Gibson
May 2023
Iterator SequencingMichael FicarraMichael FicarraJune 2024
Error.isErrorJordan HarbandJordan HarbandJune 2024
ESM Phase ImportsLuca Casonato
Guy Bedford
Luca Casonato
Guy Bedford
June 2024
"Discard" (void) BindingsRon BucktonRon BucktonJune 2024

The test262 feature flag links to a code search of tests using that feature flag, which may constitute complete or partial coverage.The ❓ means there is no feature flag for tests yet.

Contributing to proposals

SeeContributing to ECMAScript andHow We Work for the most up-to-date information on contributing to proposals to TC39 standards and how proposals advance.

Onboarding proposals

Proposals that are Stage 1 and above must be transferred tothe TC39 GitHub organization for discoverability and archival purposes. To onboard a proposal:

  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. The Github Administrator, or one of the chairs, 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 workas 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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