Tracking ECMAScript Proposals
ECMAScript Internationalization API Specification 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 This list contains only stage 2 proposals and higher that have not yet been withdrawn/rejected, or become finished.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.
Proposal | Author | Champion | Test262 Feature Flag | Last Presented |
---|---|---|---|---|
Legacy RegExp features in JavaScript | Claude Pache | Mark Miller Claude Pache |
legacy-regexp | May 2017 |
JSON Modules | Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg |
Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg |
json-modules | January 2021 |
Temporal | Philipp 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 |
Temporal | March 2021 |
Decorators | Daniel Ehrenberg Kristen Hewell Garrett |
Kristen Hewell Garrett | decorators | March 2023 |
JSON.parse source text access | Richard Gibson | Richard Gibson | json-parse-with-source | January 2023 |
RegExp Modifiers | Ron Buckton | Ron Buckton | regexp-modifiers | June 2022 |
Array.fromAsync |
J.S. Choi | J.S. Choi | Array.fromAsync | May 2023 |
Sync Iterator helpers | Gus Caplan | Michael Ficarra Jonathan Keslin Kevin Gibbons |
iterator-helpers | November 2022 |
Explicit Resource Management | Ron Buckton | Ron Buckton | explicit-resource-management | March 2023 |
Float16 on TypedArrays, DataView, Math.f16round |
Leo Balter | Leo Balter Kevin Gibbons |
:question: | May 2023 |
Decorator Metadata | Kristen Hewell Garrett | Kristen Hewell Garrett | :question: | May 2023 |
Import Attributes | Myles Borins Sven Sauleau Dan Clark Daniel Ehrenberg |
Sven Sauleau Dan Clark Daniel Ehrenberg Nicolò Ribaudo |
import-attributes | March 2023 |
Source Phase Imports | Luca Casonato | Guy Bedford Luca Casonato |
:question: | July 2023 |
Uint8Array to/from Base64 | Kevin Gibbons | Kevin Gibbons | :question: | February 2024 |
Dynamic Code Brand Checks | Nicolo Ribaudo | Krzysztof Kotowicz Mike Samuel Nicolo Ribaudo |
:question: | April 2024 |
Redeclarable global eval -introduced var s |
Shu-yu Guo | Shu-yu Guo | :question: | April 2024 |
Proposal | Author | Champion | Test262 Feature Flag | Last Presented |
---|---|---|---|---|
ShadowRealm | Caridy Patiño Jean-Francois Paradis |
Dave Herman Mark Miller Caridy Patiño Leo Balter Rick Waldron Chengzhong Wu |
ShadowRealm | February 2024 |
Promise.try |
Jordan Harband | Jordan Harband | April 2024 | |
Math.sumPrecise |
Kevin Gibbons | Kevin Gibbons | April 2024 |
Proposal | Author | Champion | Last Presented |
---|---|---|---|
function.sent metaproperty |
Allen Wirfs-Brock | HE Shi-Jun | July 2019 |
throw expressions |
Ron Buckton | Ron Buckton | January 2018 |
Function implementation hiding | Domenic Denicola Michael Ficarra |
Michael Ficarra | June 2020 |
collection normalization | Bradley Farias | Bradley Farias | January 2019 |
Array.isTemplateObject | Mike Samuel, Krzysztof Kotowicz | Krzysztof Kotowicz | December 2019 |
Map.prototype.emplace |
Bradley Farias | Erica Pramer | July 2020 |
Dynamic Import Host Adjustment | Mike Samuel, Krzysztof Kotowicz | Krzysztof Kotowicz | December 2019 |
Record & Tuple | Robin Ricard Richard Button |
Robin Ricard Richard Button |
December 2021 |
Module Expressions | Surma Daniel Ehrenberg Nicolò Ribaudo |
Surma Nicolò Ribaudo |
November 2022 |
Pipeline Operator | J. S. Choi James DiGioia Ron Buckton Tab Atkins |
J. S. Choi Ron Buckton Tab Atkins |
August 2021 |
Destructure Private Fields | Justin Ridgewell | Justin Ridgewell | December 2021 |
RegExp Buffer Boundaries (\A , \z , \Z ) |
Ron Buckton | Ron Buckton | December 2021 |
String.dedent | Misha Kaletsky Hemanth HM Justin Ridgewell |
Hemanth HM Justin Ridgewell |
June 2022 |
JSON.parseImmutable | Robin Ricard Richard Button Nicolò Ribaudo Ashley Claymore |
Robin Ricard Richard Button Nicolò Ribaudo Ashley Claymore |
July 2022 |
Module Declarations | Daniel Ehrenberg Nicolò Ribaudo |
Daniel Ehrenberg Mark Miller Nicolò Ribaudo |
November 2022 |
Symbol Predicates | Robin Ricard Jordan Harband |
Ashley Claymore Jordan Harband |
January 2023 |
Async Iterator helpers | Gus Caplan | Michael Ficarra Jonathan Keslin Kevin Gibbons |
January 2023 |
Iterator.range | Jack Works | Jack Works | March 2023 |
Async Context | Chengzhong Wu | Chengzhong Wu Justin Ridgewell |
March 2023 |
Time Zone Canonicalization | Justin Grant | Justin Grant Richard Gibson |
May 2023 |
Deferring Module Evaluation | Yulia Startsev Guy Bedford |
Yulia Startsev Guy Bedford Nicolò Ribaudo |
July 2023 |
RegExp.escape |
Domenic Denicola Benjamin Gruenbaum Jordan Harband |
Jordan Harband Kevin Gibbons |
September 2023 |
Joint Iteration | Michael Ficarra | Michael Ficarra | February 2024 |
The test262 feature flag links to a code search of tests using that feature flag, which may constitute complete or partial coverage. The :question: means there is no feature flag for tests yet.
See Contributing to ECMAScript and How We Work for the most up-to-date information on contributing to proposals to TC39 standards and how proposals advance.
Proposals that are Stage 1 and above must be transferred to the TC39 GitHub organization for discoverability and archival purposes. To onboard a proposal:
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!).