JS is one of the popular programming language used in all web applications for validation, rendering dynamic content, interactive graphics and maps, and much more. Along with HTML and CSS, JS has the power to build complete, web applications. There are two types of : Front end and back end. The front end is the part that can be seen by everyone on the browser, and the back end is the part that works behind the front end of any website. For beginners, the front end is very easy to understand, and they can create various projects in the front-end development.