JavaScript is a scripting language used to make webpages alive. Basically,there are two types of scripting the first one is Server Side Scripting and the second one is Client Side Scripting. JavaScript can be used for both type of scripting.

What is Server Side Scripting?

Server Side Scripting is the scripts you make to serve the webpages as per the user's request. Server Side Scripting can also be done in other programming languages like php, python(using Django, Flask), etc. It is also called Back-end Development.

For doing Server-Side Scripting in JavaScript you need to install Node.js.

What is Client Side Scripting?

Client Side Scripting is the scripting you do to make webpages interactive. Like Server Side Scripting Client Side Scripting cannot be done in any other language. It can only be done in JavaScript. It comes under Front-end Development.

What is Node.js?

Node.js is a JavaScript run time environment extracted fron Chrome's V8 JavaScript engine and it's also famous because of npm(node package manager) by which you can install any of the library of Node.js.