# nx-js/observer-util

Transparent reactivity with 100% language coverage. Made with ❤️ and ES6 Proxies.

Repository: https://github.com/nx-js/observer-util
Canonical: https://ross.abutalabs.com/products/observer-util
Language: JavaScript
License: MIT
License Family: permissive
Topics: reactive-programming, data-binding, proxy, observable, javascript, es6-proxies
Last push: 2023-08-06T18:54:57+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3745, "days_push": 1123, "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 1213, forks 78 (observed 2026-08-28T04:04:00.446514+00:00)

## What it is
A tiny JavaScript library providing transparent reactivity using ES6 Proxies, with observables and automatic reactions that re-run when observed state changes. It is framework-independent and supports 100% of the JavaScript language, including dynamic properties and delete.

## Use cases
- build a reactive state layer without a framework
- auto-update UI when plain JS state changes
- replace setState-style boilerplate with transparent observables
- react to dynamic property additions and deletions
- integrate reactivity into a custom frontend framework

## When to choose
- you want framework-agnostic reactivity with full JS language coverage
- you need a tiny, dependency-free observable library
- your target environments support ES6 Proxies

## When to avoid
- you need to support browsers or environments without ES6 Proxy support
- you already use a framework with a built-in reactivity system
- you need a full state management solution with devtools and ecosystem

## Facets
- artifact type: library
- maturity: maintenance
- function: state-management
- domain: frontend, web-development
- platform: browser
- tags: es6-proxies, observables, data-binding, reactivity, framework-agnostic, reactive-programming, javascript, nodejs

## Member repositories
- nx-js/observer-util (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:00.446514+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 2026-08-30T06:17:56.921641+00:00, confidence not recorded.
  - readme: https://github.com/nx-js/observer-util (fetched 2026-08-28T04:04:00.446514+00:00, sha d23143c60ddf)
- Data as of 2026-08-30T08:39:29.467469+00:00.