phetsims/axon

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Axon provides powerful and concise models for interactive simulations, based on observable Properties and related patterns.

Stars: 12
Forks: 10
Open beginner issues: 0
Indexed issues: 13

Dominant language: TypeScript
License: MIT
Last GitHub push: Jul 1, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

13 open issues indexed

RangedDynamicProperty cannot set value and range atomically. Open

status:ready-for-review type:bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

phetsims/axon#473 · 7 comments · Opened Jun 29, 2026
Mapping units from SI to description. Open

design:description dev:code-review dev:description status:ready-for-review

phetsims/axon#466 · 26 comments · 1 assignee · Opened Jul 22, 2025
Which side should the unit be on in RTL locales? Open

type:i18n

phetsims/axon#464 · 1 comment · 1 assignee · Opened Jun 3, 2025
PropertyIO is declared in ReadOnlyProperty Open

dev:phet-io priority:4-low

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

phetsims/axon#429 · Opened Feb 15, 2023
Can we eliminate some PhET-iO State order dependency code now that Properties self-guard? Open

dev:phet-io phet-io:collaboration priority:3-medium

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

phetsims/axon#413 · 2 comments · Opened Aug 31, 2022
Separate BidirectionalDynamicProperty from DynamicProperty Open

help-wanted

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

phetsims/axon#410 · 2 comments · Opened Aug 24, 2022
Revist and revise the Property hierarchy Open

type:epic

Difficulty 5/5 Over a week Newbie friendliness 15/100

phetsims/axon#404 · 1 comment · Opened Jul 21, 2022
Review UnitConversionProperty and MappedProperty Open

status:ready-for-review

phetsims/axon#399 · 1 assignee · Opened Jul 8, 2022
branch: record Open

phetsims/axon#352 · 2 comments · 1 assignee · Opened Apr 22, 2021
Eliminate unused or unnecessary ObservableArray methods from ObservableArrayDef Open

good-first-issue help-wanted

Difficulty 4/5 3-5 days Newbie friendliness 25/100

phetsims/axon#334 · 3 comments · Opened Oct 2, 2020
Fix intermediate states caused by listener order Open

dev:enhancement priority:4-low

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

phetsims/axon#303 · Opened Jun 12, 2020
how to handle gotchas related to Property setDeferred Open

dev:phet-io

Difficulty 5/5 Over a week Newbie friendliness 15/100

phetsims/axon#281 · 10 comments · Opened Jan 24, 2020
create additional type-specific Property subclasses? Open

design:phet-io dev:phet-io priority:4-low

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

phetsims/axon#221 · 32 comments · Opened Feb 12, 2019

phetsims/axon

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