Introduction to Node.js and NPM

What is Node.js?

• Node.js® is a JavaScript runtime built on Chrome's V8 JavaScript engine.

• Node.js is an open-source server environment, runs on various platforms (Windows, Linux, Unix, etc), and is free.

• Node.js uses an event-driven, non-blocking I/O, model. Use Cases Server-side Development (Web server, business logic, Database access)

What is Node Package Manager(NPM)? Node package manager manages the ecosystem of node modules or packages. These packages consist of:

• Javascript files

• Package.json

When Node.js is installed on your computer, Node package manager is automatically installed. To install Node.js click on the link below and select LTS (Recommended). https://nodejs.org/en/download/ Choose the file that is compatible with your computer and install it. To check if Node.js was correctly installed, open the command line on windows/MacOs and run (npm -v and node -v) to get the version installed.

What is a Module in Node.js? A module in Node.js can also be referred to as a Javascript library. That is a set of functions you want to include in your application project.

Node.js has a set of built-in modules that you can use without installation. To include in your application use the require() function with the name of the function in the module.

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