If you're familiar with JavaScript you've likely used asynchronous calls. Mainly, you've used promises. But now there is a new kid on the block, observables. Observables are a key concept in reactive programming, or as it's known in the JavaScript ecosystem, RxJS. So let's learn about this reactive programming library, what it is, and how we can use it in our applications. And be prepared, we can do a lot more than .then now!

You will learn:

• Understand the key concepts in reactive programming
• About relevant operators
• Show the difference between promises and observables and when to use each