RxJS
RxJS, short for Reactive Extensions for JavaScript, is a library for reactive programming using Observables, enabling developers to work with asynchronous data streams in a composable and declarative way. RxJS is widely used in web applications, SPAs, server-side applications, and frameworks like Angular. Developers can install RxJS via npm using npm install rxjs or access the official documentation at https://rxjs.dev/ for personal or business projects.