Let’s start with on the biggest challenge for Airbnb, which is one of the central difficulties handling data in a way that’s incredibly dynamic. That means you need to ensure that your JavaScript is always working hard for you without taking too much strain. That’s where a reactive approach comes into the action. As an asynchronous paradigm, it’s able to manage how data moves from its source to the components that react to it. But the paradigm can only do so much. By using ReactJS, Airbnb has a library which is capable enough of giving the necessary dynamism in your UI.