RxJs from Scratch
summary
Two-hour workshop runs live with hands-on StackBlitz exercises and concrete claims: observables come from HTTP and forms, async pipe removes manual subscribe, tap spies side effects, operators like map, filter, combineLatest and switchMap compose streams, and polling uses timer + switchMap to call an API every 30s. Solutions use a ReplaySubject/BehaviorSubject pattern for shared state; demos build working dropdowns, filtered country lists, and a working exchange-rate poller.
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chapters (22)
- 0:00Introduction
- 4:45What is RxJS
- 10:46Subscribing basics
- 13:50Dropdown selection example
- 17:29First exercise setup
- 20:18First exercise solution
- 24:00Async pipe simplification
- 28:06RxJS operators intro
- 34:29Map operator demo
- 40:27Tap for side effects
- 45:07Merge and filter combo
- 50:07CombineLatest explained
- 55:03Second exercise setup
- 56:29Second exercise solution
- 1:05:01Debugging with tap
- 1:10:01Custom observables subjects
- 1:18:14Subject types comparison
- 1:23:43Replay and Async subjects
- 1:28:06Third exercise setup
- 1:33:54Third exercise solution
- 1:39:54Subject types recap
- 1:42:58Conclusion and key takeaways
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