RxJS: Reactive-Extensions for JavaScript with Angular 2

Question

Can someone explain to me why Angular 2 requires the RxJS library and how it relates to Observables and Angular 2

Answer 1

RxJS is the JavaScript reactive programming library used by Angular2.

In fact, the class Observablecomes from this library.

For example, the EventEmitterAngular2 class (which is a hot observable) extends the class Subjectfrom RxJS. See these lines in the source:

• https://github.com/angular/angular/blob/master/modules/angular2/src/facade/async.ts#L8
• https://github.com/angular/angular/blob/master/modules/angular2/src/facade/async.ts#L109

HTTP Observable :

• HTTP
  • https://github.com/angular/angular/blob/master/modules/angular2/src/http/http.ts#L9
  • https://github.com/angular/angular/blob/master/modules/angular2/src/http/http.ts#L11
• • https://github.com/angular/angular/blob/master/modules/angular2/src/common/forms/model.ts#L221

, Angular2, Rxjs:

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• HTTP
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