# ReactiveX/learnrx

A series of interactive exercises for learning Microsoft's Reactive Extensions Library for Javascript.

Repository: https://github.com/ReactiveX/learnrx
Canonical: https://ross.abutalabs.com/products/learnrx
Language: JavaScript
License Family: other
Last push: 2019-06-25T05:54:02+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4984, "days_push": 2626, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1399, forks 287 (observed 2026-08-28T04:04:37.028824+00:00)

## What it is
A series of interactive browser-based exercises for learning Microsoft's Reactive Extensions (Rx) library for JavaScript. It teaches functional programming fundamentals like map, filter, concatAll, reduce, and zip as the foundation for reactive, asynchronous programming.

## Use cases
- learn reactive extensions for javascript
- practice functional programming in javascript
- learn map filter reduce zip through exercises
- prepare to use rxjs for async programming
- interactive tutorial for reactive programming
- train functional collection manipulation skills

## When to choose
- you want hands-on, interactive practice rather than passive reading
- you are new to RxJS and want to build functional programming foundations first
- you learn best by solving small coding challenges in the browser

## When to avoid
- you need up-to-date RxJS API coverage, as the material dates from around 2019
- you want a runnable library or tool rather than a tutorial
- you already know functional programming and only need RxJS operator reference

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: developer-tools
- domain: tutorials, programming-languages, web-development
- platform: browser
- tags: reactive-extensions, rxjs, functional-programming, interactive-exercises, tutorial, javascript, nodejs

## Member repositories
- ReactiveX/learnrx (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:37.028824+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 2026-08-30T04:39:09.042912+00:00, confidence not recorded.
  - readme: https://github.com/ReactiveX/learnrx (fetched 2026-08-28T04:04:37.028824+00:00, sha e04e1f4007e1)
- Data as of 2026-08-30T08:39:29.467469+00:00.