What is the difference between Promises and Observables?

Question

What is the difference between Promise and Observable in Angular?

An example on each would be helpful in understanding both the cases. In w

Answer 1

Promises and Observables both handle the asynchronous call only.

Here are the differences between them:

Observable

1. Emits multiple values over a period of time
2. Is not called until we subscribe to the Observable
3. Can be canceled by using the unsubscribe() method
4. Provides the map, forEach, filter, reduce, retry, and retryWhen operators

Promise

1. Emits only a single value at a time

2. Calls the services without .then and .catch

3. Cannot be canceled

4. Does not provide any operators