This course is split into 7 sections; section 1 is a fast-paced quick introduction to NodeJS and how you start using NodeJS. We discuss what NodeJS is and that it is not a programming language like JavaScript but an interpreter and environment for JavaScript. Moving further with section 2, we explore the fundamentals of JavaScript and writing JavaScript code within the Node. It is loaded with examples about the basics of coding JavaScript. As Node uses JavaScript code, this section will provide a refresher and quick overview of JavaScript, and is designed to cover core JavaScript required for the upcoming sections and writing Node. JavaScript asynchronous programming explains asynchrony in computer programming, refers to the occurrence of events independent of the main program flow and ways to deal with such events, and shows how to add callbacks that run once a stack is complete. Each module in NodeJS has its own context and cannot interfere with other modules. Modules are like libraries that you can include in your application. Node.js has a set of built-in modules you can use without any further installation, such as http, fs, path, and url. Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. Explore how to set up a web application quickly with Express. All resources and code files are present at: https://github.com/PacktPublishing/NodeJS-MongoDB-Express---Beginner-to-Intermediate-JavaScript-