As we know, promises are for handling async requests and observables can also do the same. But where do they differ?
Observables are lazy whereas promises are not
This is pretty self-explanatory: observables are lazy, that is we have to subscribe observables to get the results. In the case of promises, they execute immediately.
Observables handle multiple values unlike promises
Promises can only provide a single value whereas observables can give you multiple values.
Observables are cancelable
You can cancel observables by unsubscribing it using the unsubscribe method whereas promises don’t have such a feature.
Observables provide many operators
There are many operators like map, forEach, filter etc. Observables provide these whereas promises does not have any operators in their bucket.
These are features that makes observables different from promises.
Now, it’s time to end. I hope you have a better understanding of the hot topic of observables!
Thanks for reading!
