Summary
In this chapter, you learned how to implement a simple monitor server that pushes data changes in real time to the client. We used Node.js because of its nonblocking I/O behavior and because of the fact that we can write the server code in JavaScript.
After installing Node.js and creating a package.json file for the application, we installed the express and serve-static web framework via the npm Node package manager.
We used the serve-static package to serve all the static files in the root directory of our application and added it as a middleware to express. This allows you to write a simple file server in less than 10 lines of code.
To implement real-time communication, we need a bidirectional connection rather than the unidirectional HTTP ...
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