tc39/proposal-amount

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Numbers with precision and a unit for JavaScript

Stars: 58
Forks: 12
Open beginner issues: 0
Indexed issues: 46
Avg merge: 2h 35m
Merged PRs (30d): 2

Dominant language: HTML
License: MIT
Last GitHub push: Sep 7, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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46 open issues indexed

Should we have a `region` option instead of `locale`? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#158 · Opened Sep 2, 2026
Compound `-per-` units should be supported Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#157 · 3 comments · Opened Aug 31, 2026
convertTo into sequence units should not use Euclidean division Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

tc39/proposal-amount#156 · Opened Aug 31, 2026
`GetNumberFormatPattern`'s unit reconciliation unreachable from `Amount.p.toLocaleString` Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

tc39/proposal-amount#154 · 1 comment · Opened Aug 31, 2026
We need an equality function Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#153 · 4 comments · Opened Aug 27, 2026
GetPreferredUnits asserts constraints on its region argument instead of expressing them in the parameter type Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

tc39/proposal-amount#151 · Opened Aug 19, 2026
Consider adding 's' and 'n' to serialized form for String and BigInt Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#147 · 4 comments · Opened Aug 13, 2026
Type of the non-final entries of an Array `.value` when precision is applied in constructor Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

tc39/proposal-amount#142 · 2 comments · Opened Aug 11, 2026
Precision of conversion between non-primitive units Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#140 · 2 comments · Opened Aug 6, 2026
Duration / time units in Amount Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#139 · 2 comments · 1 reaction · Opened Jul 16, 2026
Going through strings for numerical operations Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#138 · 1 reaction · Opened Jul 14, 2026
Support UTS 35 long unit identifiers in Amount construction and conversion? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#129 · 1 comment · Opened Jul 8, 2026
Amount + Sequence Units Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#118 · 25 comments · Opened May 21, 2026
Amount toString serialization discussions Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#116 · 13 comments · Opened May 21, 2026
Computing Correct Results Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#115 · 11 comments · Opened May 21, 2026
Construction of canonical exponential strings is overly cumbersome Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

tc39/proposal-amount#113 · Opened May 19, 2026
Add spec text for handling for `locale` and `usage` conversion options Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tc39/proposal-amount#109 · Opened May 16, 2026
May review Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#108 · 14 comments · Opened May 15, 2026
Using BigInts with Amount should not be painful Open

Difficulty 3/5 1-2 days Newbie friendliness 56/100

tc39/proposal-amount#107 · 7 comments · Opened May 11, 2026
Move rounding into an explicit function Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

tc39/proposal-amount#106 · 7 comments · Opened May 11, 2026
How to represent absence of unit? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#99 · 15 comments · Opened Apr 17, 2026
Interesting cases to be covered in test262 Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tc39/proposal-amount#96 · 2 comments · Opened Apr 3, 2026
ECMA-402 layering is incorrect Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#95 · Opened Apr 2, 2026
Observable validation logic Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tc39/proposal-amount#92 · 4 comments · Opened Apr 1, 2026
Retain numeric types across convertTo operations Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

tc39/proposal-amount#91 · 10 comments · Opened Mar 26, 2026
List supported units Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#88 · Opened Mar 12, 2026
March 2026 review Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#87 · 2 comments · Opened Mar 10, 2026
Default locale in unit conversion Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

tc39/proposal-amount#83 · Opened Feb 20, 2026
Semantics of undefined unit Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#78 · 3 comments · 1 reaction · Opened Jan 15, 2026
Number.Amount + Decimal.Amount Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

tc39/proposal-amount#75 · Opened Jan 6, 2026
November review Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tc39/proposal-amount#74 · Opened Nov 19, 2025
Implication of polymorphic Amount to round-trip conversions Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#72 · 2 comments · Opened Nov 4, 2025
Document and decide on arithmetic toPrimitive footguns Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#71 · 1 comment · 2 reactions · Opened Oct 6, 2025
Adapting `ToIntlMathematicalValue` to not read internal slots Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#64 · 7 comments · Opened Sep 22, 2025
Constructing an Amount from an Amount? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

tc39/proposal-amount#59 · 2 comments · 1 reaction · Opened Sep 18, 2025
fractionDigits and significantDigits Open

tc39/proposal-amount#54 · 16 comments · 1 assignee · Opened Jul 30, 2025
JSON support Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

tc39/proposal-amount#53 · 4 comments · Opened Jul 30, 2025
Large and small values Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#52 · 3 comments · Opened Jul 30, 2025
Formatting with increased precision seems like an error case Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#49 · 15 comments · Opened Jul 29, 2025
`BigInt(new Amount(bigint))` roundtrip. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#45 · 4 comments · Opened Jul 25, 2025
Prior Art Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

tc39/proposal-amount#43 · 9 comments · Opened Jul 19, 2025
What limits should Amount mathematical values have? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#37 · 3 comments · Opened Jul 18, 2025
Should we validate currency codes with `IsWellFormedCurrencyCode`? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#33 · Opened Jul 16, 2025
Largest and smallest string decimals Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tc39/proposal-amount#27 · 5 comments · Opened May 30, 2025
Unit extensibility Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

tc39/proposal-amount#25 · 3 comments · Opened Feb 21, 2025
Rationals Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

tc39/proposal-amount#23 · 15 comments · 1 reaction · Opened Feb 20, 2025

tc39/proposal-amount

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