Jan 6, 2020 in Angular
Q: How do Observables differ from Promises?

1 Answer

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Jan 6, 2020

As soon as a promise is made, the execution takes place. However, this is not the case with observables because they are lazy. This means that nothing happens until a subscription is made. While promises handle a single event, observable is a stream that allows passing of more than one event. A callback is made for each event in an observable.

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