Promises Vs Observables: Key Differences In JavaScript
Promises handle single async ops, while Observables handle multiple async events as a stream of values. Promises are eager & can't be canceled, while Observables are lazy & multicast. Choose wisely!
Promises and observables are both mechanisms for handling asynchronous operations in JavaScript, but they have some differences in terms of functionality and behavior. A Promise is an object that represents the eventual completion or failure of an asynchronous operation and its resulting value. It is used to handle a single asynchronous event. When a promise is created, it is in one of three states: pending, fulfilled, or rejected. A pending promise is in an initial state, and it transitions to either fulfilled (resolved) or rejected (with an error) when the asynchronous operation completes. P...