RxJS
https://github.com/Reactive-Extensions/RxJS
http://reactivex.io/
https://github.com/ReactiveX/rxjs
http://reactivex.io/rxjs
https://rxjs-dev.firebaseapp.com/
https://www.learnrxjs.io/
https://rxjs-cn.github.io/learn-rxjs-operators/
https://xgrommx.github.io/rx-book/
https://egghead.io/lessons/rxjs-what-is-rxjs
Angular
https://angular.io/guide/rx-library