reactive-extensions

Reactive Extensions for JS

• Observables
  • Observable
  • Flowable
  • Maybe
  • Single
  • Completable
• Subjects
  • ObservableSubject
  • MaybeSubject
  • SingleSubject
  • CompletableSubject
• Scheduler
• Cancellable

All Observables are extended in this package to allow observable conversion, and other features.

Installation

• NPM

npm i reactive-extensions

• CDN

  • jsDelivr

  <script src="https://cdn.jsdelivr.net/npm/is-reactive-streams/dist/index.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/rx-cancellable/dist/index.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/rx-scheduler/dist/index.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/rx-maybe/dist/index.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/rx-single/dist/index.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/rx-completable/dist/index.min.js"></script>

  • unpkg

  <script src="https://unpkg.com/is-reactive-streams/dist/index.min.js"></script>
  <script src="https://unpkg.com/rx-cancellable/dist/index.min.js"></script>
  <script src="https://unpkg.com/rx-scheduler/dist/index.min.js"></script>
  <script src="https://unpkg.com/rx-maybe/dist/index.min.js"></script>
  <script src="https://unpkg.com/rx-single/dist/index.min.js"></script>
  <script src="https://unpkg.com/rx-completable/dist/index.min.js"></script>

Difference between reactive-extensions and RxJS

There is already an existing ReactiveX implementation in JS called RxJS. reactive-extensions does not intend to replace RxJS, as this library was meant for educational purposes but evolved into a library that can be used for production. You can use either of two, but both libraries does not interop with one another.

Below is the comparison table between reactive-extensions and RxJS

Behavior	reactive-extensions	RxJS
Code	Written in pure JavaScript.	Written in TypeScript.
Observable Extensions	Supports Maybe, Single, Completable and Flowable	None
Operator Composition	Can both wrap the Emitter (through compose) and the Observer (through lift).	Wraps the Subscriber.
Operators	Bundled with their respective classes. Other operators returns a different type of Observable.	Exportable as an individual module.
Pipelines	Using compose.	Using pipe
Subscription	Uses Cancellable and Subscription (Flowable only)	Uses the Subscription class.
TC39 Observable	No.	Yes.
Performance	needs testing	needs testing

Useful Links

• Official Reactive Extensions Website
• ReactiveX Marbles