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Taste of RxJS
The document discusses RxJS, a library for composing asynchronous and event-based programs using observable sequences. It covers key concepts such as observables, observers, and operators, highlighting the advantages of RxJS over promises, including the ability to handle multiple events and support cancellation. Additionally, it notes that RxJS is utilized in frameworks like Angular for managing asynchronous actions.
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Taste of RxJS
- 1. TASTE OF RXJS NGMEETUP
- 2. MD. ZIAUL HAQ JavaScriptDeveloper @Upwork Global Author @Packt Follow me: @jquerygeek
- 3.
- 4. RXJS ▸ Reactive Extensionsfor JavaScript, A Library ▸ Combination of Observer pattern and Iterator pattern with functional approach ▸ Handle asynchronous events as collection
- 5. RXJS ▸ RxJS isa library for composing asynchronous and event- based programs by using observable sequences
- 6. RXJS ▸ A libraryfor composing asynchronous program by using observable sequences ▸ Also provide a long list of operator for select, filter,, transform, combine, etc
- 7. THINK OF RXJSAS LODASH FOR EVENTS reactivex.io
- 8. STREAM ▸ A sequenceof ongoing events order by time ▸ We can get value, error and complete signal from stream
- 9. SOURCE OF DATASTREAM ▸ UI Events ▸ Http request ▸ Array like object ▸ Memory / cache
- 10. RXJS IS NOTALONE ▸ RxJS ▸ RxJava ▸ RxPHP ▸ Rx.Net ▸ RxScala ▸ RxSwift
- 11. WHAT RXJS CONTAINS ▸Observable ▸ Observer ▸ Operators
- 12. OBSERVABLE ▸ Observable areused to watch these stream and emit functions when a value, error or complete signal return ▸ Observable can be subscribed by an observer or many observer ▸ Observable will constantly watch stream and will update accordingly ▸ We can interact with as regular array and can apply all the operator on these data.
- 13. OBSERVABLE IS JUSTA FUNCTION THAT TAKES AN OBSERVER AND RETURNS A FUNCTION Ben Lesh
- 15. COLD VS HOTOBSERVABLE ▸ Cold: When subscribe ▸ Hot: From begging
- 16. OBSERVER ▸ Observer watchthe Observable ▸ Use .subscribe() for invoke the Observable
- 17. OPERATORS ▸ Creating operators:fromEvent ▸ Transformation operators: map, scan ▸ Filtering operators: filter, first ▸ Combination operators: concat ▸ Utility operators: toPromise
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- 20. WHO USING ▸ Angularreturn Observable on asynchronous actions ▸ Goes with every framework
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- 22. OBSERVABLE VS PROMISE ▸All that Promise provide ▸ Observable can handle multiple events ▸ Cancelable ▸ Can retry with retry operator
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