I actually didn’t look hard enough: there is a proposal[0] for something that could be called ‘BigDecimal’ in ECMAScript, but it’s a stage 0 proposal[1]. As for why a decimal type hasn’t progressed further in ECMAScript you’ll want to read the notes [2] from the meeting where the latest proposal was discussed.
[0] https://docs.google.com/presentation/d/1jPsw7EGsS6BW59_BDRu9...
[1] https://github.com/tc39/proposals/blob/master/stage-0-propos...
[2] https://github.com/rwaldron/tc39-notes/blob/b8da60318b564f13...
In BigInt: Arbitrary precision integers in JavaScripttc39
proposals
Web Development2016–2025
tc39 / proposals
proposals
Tracking ECMAScript Proposals
39Distinct people
46Mentions
1Explicit recommenders
19.2KGitHub stars
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Tracking ECMAScript Proposals
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Don't they still have to wait for the spec to finalize / hit stage 3? Don't get me wrong, I'm super excited for this functionality because I love it in languages like F# and…
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Mentions over time
HN mentions by year46 dated mentions
Observed mentions: 2016-05-16 09:42:28 UTC to 2025-08-03 23:04:30 UTC.
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View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 7 | 2 | 5 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 12 | 0 | 12 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 10 | 3 | 7 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 4 | 1 | 3 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 2 | 0 | 2 |
From the project README
An excerpt from the repository, fetched Nov 13, 2026.
Read the project’s introduction
ECMAScript proposals
Stage 1 Proposals
Stage 0 Proposals
Finished Proposals
Inactive Proposals
ECMAScript Internationalization API Specification proposals
Contributing to 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
Test262 Feature Flag
Meeting Notes
Legacy RegExp features in JavaScript
Claude Pache
Mark Miller
Claude Pache
legacy-regexp
-2026‑01
-2024‑06
-2023‑07
-2017‑05
-2017‑05
-2017‑03
-2016‑09
Source Phase Imports
Luca Casonato
Guy Bedford
Luca Casonato
source-phase-imports
-2026‑05
-2026‑01
-2024‑10
-2024‑07
-2024‑06
-2023‑07
-2023‑05
-2023‑05
-2023‑03
Dynamic Code Brand Checks
Nicolo Ribaudo
Krzysztof Kotowicz
Mike Samuel
Nicolo Ribaudo
No test262 tests
-2026‑05
-2026‑01
-2024‑06
-2024‑04
-2021‑01
-2019‑12
-2019‑07
Deferring Module Evaluation
Yulia Startsev
Guy Bedford
Nicolò Ribaudo
import-defer testing plan
-2026‑07
-2026‑03
-2025‑02
-2024‑12
-2024‑12
-2024‑10
-2024‑06
-2024‑04
-2023‑07
-2022‑11
-2021‑01
Non-extensible Applies to Private
Mark Miller
Shu-yu Guo
Chip Morningstar
Erik Marks
Mark Miller
Shu-yu Guo
Chip Morningstar
Erik Marks
nonextensible-applies-to-private
-2025‑09
-2025‑07
-2025‑04
Import Text
Eemeli Aro
Eemeli Aro
import-text
-2026‑03
-2025‑11
Error Stack Accessor
Jordan Harband
Jordan Harband
Mark Miller
tests PR
-2026‑05
-2026‑03
-2025‑11
-2025‑02
RegExp Buffer Boundaries (\A, \z, \Z)
Ron Buckton
Ron Buckton
tests PR
-2026‑05
-2026‑03
-2026‑01
-2023‑07
-2021‑12
-2021‑10
Await Dictionary
Alexander J. Vincent
Ashley Claymore
Jordan Harband
Chris de Almeida
await-dictionary tests 1 2
-2026‑07
-2025‑11
-2025‑09
-2023‑03
Curtailing the power of "Thenables"
Matthew Gaudet
Matthew Gaudet
❓
-2026‑09
-2026‑09
-2026‑07
-2026‑07
-2026‑05
-2026‑03
-2025‑07
-2025‑02
Stage 2.7
Proposal
Author
Champion
Test262 Feature Flag
Meeting Notes
Decorators
Daniel Ehrenberg
Kristen Hewell Garrett
Kristen Hewell Garrett
decorators testing plan
-2026‑05
-2025‑11
-2025‑02
-2024‑06
-2023‑11
-2023‑05
-2023‑03
-2023‑01
-2023‑01
-2022‑06
-2022‑03
-2022‑03
-2022‑03
-2021‑12
-2021‑07
-2020‑09
-2020‑07
-2020‑06
-2020‑03
-2019‑03
-2019‑01
-2018‑11
-2018‑09
-2018‑07
-2018‑05
-2018‑03
-2018‑01
-2018‑01
-2017‑09
-2017‑09
-2017‑07
-2016‑09
-2016‑07
-2016‑05
-2016‑01
-2015‑09
-2015‑05
-2015‑03
-2015‑01
-2014‑04
Decorator Metadata
Kristen Hewell Garrett
Kristen Hewell Garrett
decorator-metadata
-2026‑05
-2024‑06
-2023‑05
-2023‑05
-2023‑03
ShadowRealm
Caridy Patiño
Jean-Francois Paradis
Dave Herman
Mark Miller
Caridy Patiño
Leo Balter
Rick Waldron
Chengzhong Wu
ShadowRealm
-2025‑02
-2025‑02
-2024‑12
-2024‑06
-2024‑02
-2023‑11
-2023‑09
-2022‑11
-2022‑09
-2022‑06
-2022‑03
-2021‑12
-2021‑08
-2021‑07
-2021‑05
-2021‑04
-2021‑01
-2020‑11
-2020‑06
-2020‑02
-2018‑07
-2018‑05
-2017‑03
-2017‑01
-2015‑05
-2014‑06
-2014‑01
ESM Phase Imports
Luca Casonato
Guy Bedford
Luca Casonato
Guy Bedford
❓
-2026‑05
-2026‑03
-2024‑12
-2024‑12
-2024‑10
-2024‑06
-2024‑04
-2024‑02
Immutable ArrayBuffers
Mark Miller
Peter Hoddie
Richard Gibson
Jack Works
Mark Miller
Peter Hoddie
Richard Gibson
Jack Works
❓
-2025‑07
-2025‑05
-2025‑04
-2025‑02
-2024‑12
-2024‑10
Import Bytes
Steven Salat
Steven Salat
Import Bytes
-2025‑09
JSON.parse options
Robin Ricard
Richard Button
Nicolò Ribaudo
Ashley Claymore
Nicolò Ribaudo
Ashley Claymore
Peter Klecha
❓
-2026‑07
-2026‑03
-2023‑07
-2022‑07
export all from
Guy Bedford
Nicolò Ribaudo
❓
 -2026‑09
-2026‑05
Deferred Re-exports
Nicolò Ribaudo
Nicolò Ribaudo
❓
-2026‑09
-2026‑05
-2026‑01
-2025‑11
-2025‑09
-2025‑04
-2024‑04
Stage 2
Proposal
Author
Champion
Stage 2.7 reviewers
Meeting Notes
function.sent metaproperty
Allen Wirfs-Brock
Daniel Ehrenberg
Domenic Denicola
-2026-01
-2026‑01
-2024‑06
-2022‑06
-2019‑07
-2018‑03
-2015‑11
-2015‑11
throw expressions
Ron Buckton
Ron Buckton
Nicolò Ribaudo
-2024‑06
-2024‑02
-2023‑09
-2023‑09
-2023‑07
-2018‑01
-2017‑11
-2017‑09
-2017‑07
Function implementation hiding
Domenic Denicola
Michael Ficarra
Michael Ficarra
Yehuda Katz
Waldemar Horwat
Mike Samuel
-2026‑01
-2024‑06
-2023‑07
-2020‑06
-2019‑12
-2019‑07
-2018‑05
collection normalization
Bradley Farias
Michael Ficarra
Ashley Claymore
Jordan Harband
-2026‑01
-2021‑03
-2019‑07
-2019‑01
Module Expressions
Surma
Daniel Ehrenberg
Nicolò Ribaudo
Surma
Nicolò Ribaudo
Leo Balter
Guy Bedford
Mathieu Hofman
Jordan Harband
-2022‑11
Pipeline Operator
J. S. Choi
James DiGioia
Ron Buckton
Tab Atkins
J. S. Choi
Ron Buckton
Tab Atkins
Ross Kirsling
Christian Ulbrich
-2026‑01
-2023‑07
-2022‑03
-2022‑01
-2021‑08
-2021‑03
-2018‑03
-2017‑11
-2017‑09
Destructure Private Fields
Justin Ridgewell
Kevin Gibbons
Robin Ricard
Waldemar Horwat
Sarah Groff Hennigh-Palermo
Jordan Harband
Sergey Rubanov
-2026‑01
-2023‑07
-2021‑12
String.dedent
Misha Kaletsky
Hemanth HM
Justin Ridgewell
Hemanth HM
Justin Ridgewell
Robin Ricard
Jordan Harband
Mark Cohen
Sarah Groff Hennigh-Palermo
-2026‑01
-2022‑11
-2022‑09
-2022‑06
-2020‑09
Module Declarations
Daniel Ehrenberg
Nicolò Ribaudo
Mark Miller
Nicolò Ribaudo
Richard Gibson
Guy Bedford
-2022‑11
Symbol Predicates
Robin Ricard
Jordan Harband
Ashley Claymore
Jordan Harband
Daniel Minor
Nicolò Ribaudo
Mathieu Hofman
-2026‑01
-2023‑09
-2023‑05
-2023‑01
-2022‑07
Async Iterator helpers
Gus Caplan
Michael Ficarra
Jonathan Keslin
Kevin Gibbons
Richard Gibson
Yulia Startsev
Jason Orendorff
-2026‑07
-2026‑07
-2025‑11
-2024‑06
-2023‑09
-2023‑05
Iterator.range
Jack Works
Jack Works
Waldemar Horwat
Jordan Harband
-2026‑01
-2024‑04
Read the full README on GitHubWhat Hacker News says
10 sourcesDon't they still have to wait for the spec to finalize / hit stage 3?
Don't get me wrong, I'm super excited for this functionality because I love it in languages like F# and Elixir, but it looks like the pipe proposal is still stage 1.
https://github.com/tc39/proposals/blob/master/README.md
In TypeScript support for ES Next pipeline operatorA page to track ECMAScript proposals
1 points · Open discussionTc39/proposals: Tracking ECMAScript Proposals
1 points · Open discussionAfter several years of stagnation, ES6[1] massively improved the language, and there is a pipeline of more proposals[2].
[1]: http://es6-features.org/
[2]: https://github.com/tc39/proposals
In Show HN: A free, lightweight static page to get stock quotes using the IEX APIFetch is a Web API, not an ECMAScript language feature, so TC39 doesn’t have much to do with it. They do do Promises though and Cancellation is a Stage 1 proposal [0], so it’s more than a year away from standardization at best.
WHATWG handles Fetch and their spec[1] was updated seven days ago.
[0] https://github.com/tc39/proposals/blob/master/README.md
[1] https://fetch.spec.whatwg.org
In D3.js 5.0 is outPromise.prototype.finally is now stage 4
1 points · Open discussionJust in case anyone is not aware there is a stage 3 proposal [1] for 64 bit integers right now called BigInt [2].
[1]: https://github.com/tc39/proposals
[2]: https://github.com/tc39/proposal-bigint
In ECMAScript 2018: final feature setNo. There's still lots of ongoing work. There's a repo [0] with proposals and the different stages they're in.
Why would WASM mean slowing down JS changes?
[0] https://github.com/tc39/proposals
In ECMAScript 2018: final feature setI couldn’t immediately see any proposals for list/set/object comprehensions at https://github.com/tc39/proposals, are there any?
In ECMAScript 2018: final feature set