# optimizely/nuclear-js

Reactive Flux built with ImmutableJS data structures. Framework agnostic.

Repository: https://github.com/optimizely/nuclear-js
Canonical: https://ross.abutalabs.com/products/nuclear-js
Homepage: https://optimizely.github.io/nuclear-js/
Language: JavaScript
License: MIT
License Family: permissive
Topics: optimizely-environment-prod, optimizely-owner-cjs, experimentation, production
Last push: 2025-04-29T23:12:49+00:00

## Health v2 (maintenance only)
Score: 31/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 19, release rhythm 8, longevity 100
- inputs: {"age_days": 4370, "days_push": 491, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2269, forks 141 (observed 2026-08-28T04:06:32.956501+00:00)

## What it is
NuclearJS is a reactive Flux state management library built on ImmutableJS data structures, with all application state in a single immutable map. It is framework agnostic, using functional 'getters' for derived state and offering integrations with React and Vue.

## Use cases
- manage application state with immutable data structures
- implement Flux architecture in a JavaScript app
- build reactive dataflow between stores and React or Vue views
- keep all app state in a single debuggable immutable map
- derive and compose state without stores referencing each other
- run Flux state logic on a Node.js server without a UI

## When to choose
- you want immutable, functional Flux-style state management decoupled from any UI framework
- you prefer a single immutable state map with declarative stores and composable getters
- you need state logic that runs identically on server and client

## When to avoid
- you are starting a new project where modern solutions like Redux, Zustand, or MobX are better supported
- you need a library with active development and a large current community
- you want built-in async action handling or modern ecosystem tooling

## Facets
- artifact type: library
- maturity: maintenance
- function: state-management, frontend-framework
- domain: web-development, frontend, developer-tools
- platform: browser
- tags: flux, immutablejs, reactive, getters, framework-agnostic, nodejs, javascript

## Member repositories
- optimizely/nuclear-js (main) score 31

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:32.956501+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:42:00.100035+00:00, confidence not recorded.
  - readme: https://github.com/optimizely/nuclear-js (fetched 2026-08-28T04:06:32.956501+00:00, sha 68c28176ebca)
  - homepage: https://optimizely.github.io/nuclear-js/ (fetched 2026-08-29T10:22:40.741079+00:00, sha c6ec699d9f3f)
  - registry_npm: https://registry.npmjs.org/nuclear-js (fetched 2026-08-29T10:22:40.745293+00:00, sha a4b8113a31d5)
- Data as of 2026-08-30T08:39:29.467469+00:00.