The problem with cross-domain AJAX calls

All the asynchronous calls that we have made until now have been on the node server. The node server has already handled the functionality for supporting CORS. There are situations where we want to load data from a different domain, such as fetching data from other APIs, which may not have CORS supports. Server-side programs are designed to handle these kinds of call; we can use cURL to make HTTP calls to different domains to fetch such data. This increases our dependency on server-side programs as we have to make a call to our server, which in turn makes a call to another domain to fetch the data, which is returned to a client-side program. It might come across as being a trivial issue, but we are adding an extra layer to our web architecture. To avoid making a server-side call, let us try and see if we can make an asynchronous call to...