Simply put, a web framework makes it easier to develop a web application. Consider the aspect of breaking down commonly used functionality into reusable modules. That is exactly what frameworks do. They come with a lot of reusable modules and enforce a standard structure for the code so that it will be easier for developers across the world to go through and understand the application. Apart from all these advantages, web frameworks mostly get maintained by lots of developers across the world. So, the effort of developers in incorporating the newer bug fixes and features of underlying languages is minimized to a step where we just need to upgrade the framework version that is being used by the application. So, the use of web frameworks for building web applications brings a lot of advantages to the development and maintenance phases of an application.

The Express.js framework, which we are going to use throughout this book, is a Model View Controller (MVC) based...