This blog will be the first part of “What RxJS really is?” series and will cover,RxJS explained in simple terms.Why use RxJS ?RxJS Terms and SyntaxRxJS explained in simple terms."RxJS is a library for composing asynchronous and event-based programmes by using observable sequences." This is the explanation given by the RxJS team in the official documentation, and believe me, I did not understand a thing from this line. So let's make things simple with an example:Let's take the very s...