Reactive Programming with RxJS

Getting Real-Time Updates from Twitter

The second part of our plan to make a real-time dashboard for earthquakes is to add reports and information from Twitter related to the different earthquakes happening on the planet. For this, we’ll create a small Node.js program that will fetch the stream of tweets related to the earthquakes.

Setting Up Our Node.js Environment

Let’s configure our Node.js application. Besides RxJS, we will be using two venerable third-party modules to make our life easier: ws and twit.^[19] Any similar modules should work with minimal changes to the code.

First, let’s create a folder for our application and install the modules that we’ll use. (Note that the output of the npm command may vary depending on the current versions ...