# ReactiveX/rxdart

The Reactive Extensions for Dart

Repository: https://github.com/ReactiveX/rxdart
Canonical: https://ross.abutalabs.com/products/rxdart
Homepage: http://reactivex.io
Language: Dart
License: Apache-2.0
License Family: permissive
Last push: 2026-06-15T20:54:14+00:00

## Health v2 (maintenance only)
Score: 62/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 87, release rhythm 8, longevity 100
- inputs: {"age_days": 3970, "days_push": 79, "days_rel": 564, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3433, forks 274 (observed 2026-08-28T04:08:04.269573+00:00)

## What it is
RxDart is the ReactiveX implementation for Dart, providing observable streams and composable operators on top of native Dart Streams. It includes a companion rxdart_flutter package and is a Flutter Favorite package for reactive asynchronous programming.

## Use cases
- combine and transform dart streams with rx operators
- debounce user input events in flutter
- manage app state with observable streams
- handle asynchronous event streams reactively
- convert callbacks into observable streams
- implement reactive state management in dart

## When to choose
- you're building Dart or Flutter apps with complex asynchronous event flows
- you want the familiar ReactiveX operator API in Dart
- you need Subjects, Schedulers, and stream combinators beyond dart:async

## When to avoid
- your app has simple async needs covered by native Dart Streams and Futures
- you prefer other Flutter state management solutions like Bloc or Riverpod
- you're not working in the Dart ecosystem

## Facets
- artifact type: library
- maturity: active
- function: concurrency, state-management, streaming
- domain: cross-platform, mobile-development, developer-tools
- platform: cross-platform
- tags: reactive-programming, observables, streams, flutter, reactivex, mobile

## Member repositories
- ReactiveX/rxdart (main) score 62

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:04.269573+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 2026-08-29T18:37:43.768843+00:00, confidence not recorded.
  - readme: https://github.com/ReactiveX/rxdart (fetched 2026-08-28T04:08:04.269573+00:00, sha 4d4df58c5b7f)
  - homepage: http://reactivex.io (fetched 2026-08-29T09:31:50.580652+00:00, sha 82cef0299f27)
  - site_page: https://reactivex.io/documentation/observable.html (fetched 2026-08-29T09:31:50.583205+00:00, sha 9a5601c77b6d)
  - site_page: https://reactivex.io/documentation/operators.html (fetched 2026-08-29T09:31:50.586148+00:00, sha a0acd380d044)
  - site_page: https://reactivex.io/documentation/single.html (fetched 2026-08-29T09:31:50.588990+00:00, sha 5cb896bf348b)
  - site_page: https://reactivex.io/documentation/subject.html (fetched 2026-08-29T09:31:50.591636+00:00, sha 4aee216f65c4)
  - site_page: https://reactivex.io/documentation/scheduler.html (fetched 2026-08-29T09:31:50.593794+00:00, sha 12a5c3e9ebce)
- Data as of 2026-08-30T08:39:29.467469+00:00.