What functionalities that RxJS provide for Angular2?

问题

There is some references of RxJS in the Angular2 project. What is RxJS being used for in Angular2?

回答1:

A list of what angular2 uses RxJS for

Http (for example its get method returns an Observable)
EventEmitter (like you said, extends from Subject)
AsyncPipe which supports Promise, Observable or EventEmitter.
QueryList's changes method returns an EventEmitter. Update
NG_ASYNC_VALIDATORS which implements Validator and overrides the method validate to return either a Promise or an Observable. Update

Note about NG_ASYNC_VALIDATORS

NG_ASYNC_VALIDATORS doesn't use Observable directly, it doesn't subscribe to them but converts them to Promises, in any case, NG_ASYNC_VALIDATORS still accepts Observables. Look at line #104 in validators.ts.

Thanks to @przemcio for the observation.

Not yet implemented / In conversation

ObserveChild which would return an EventEmitter.
ObserveChildren Update

Note

They are working on bundle RxJS with the bare operators, see issue #5288. The idea is to distribute angular2 with the minimal required operators and make the user to provide the rest of them.

Note update

Like I was told here and here (I had a problem with importing Subject) they're working on removing completely Subject, so from core we would be able to import only Observable, everything else should be provided by the developer.

I can't think of any other, if I remember of something else I'll update the answer.

来源：https://stackoverflow.com/questions/33860374/what-functionalities-that-rxjs-provide-for-angular2

标签

angular

rxjs