Express JS is often mistaken for Node.js due to their similarities. Node.js is an open-source, cross-platform, JavaScript runtime environment used for creating web applications, while Express JS is a web application framework constructed on top of Node.js.
The major difference between Node.js and Express JS is that Node.js is a JavaScript runtime environment, while Express JS is a web application framework built on top of Node.js. Node.js is the foundation for developing server-side applications, while Express JS provides an array of features for creating web applications.
Express JS operates by setting up an application object which can be used to define routes, handle HTTP requests, and manage the data flow between the client and server. It also has a set of middleware functions for extending the functionality of the application and a templating engine for crafting dynamic web pages.
In conclusion, Express JS is an open source web application framework for Node.js, a JavaScript runtime. Node.js is used to create server-side applications with JavaScript, while Express JS is a web application framework built on top of Node.js. Express JS enables developers to define routes, handle HTTP requests, and manage the data flow between the client and server.