Topic 2

Basics of Nodejs and Installation

Nodejs Installation

• Download Link: (Install The LTS One)
• Youtube Tutorial

What is Nodejs?

• Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine.
• Node.js is free and open source.
• Node.js is platform independent.
• Node.js uses JavaScript on the server.

What Can Node.js Do?

• Node.js can generate dynamic page content
• Node.js can create, open, read, write, delete, and close files on the server
• Node.js can collect form data
• Node.js can add, delete, modify data in your database

Node allows developers to write JavaScript code that runs directly in a computer process itself instead of running it in a browser. Node can, therefore, be used to write server-side applications with access to the operating system, file system, and everything else required to build fully-functional applications.

Good Reads

• What is Nodejs used for?
• 6 Types of Applications You Can Build With Node.js

Why Node?

Node “uses an event-driven, non-blocking I/O model.”

• In practice, this means that Node is built well to handle asynchronous JavaScript code to perform many asynchronous activities such as reading and writing to the file system, handling connections to database servers, or handling requests as a web server.
• To handle asynchronous code, Node uses a callback-based system.

Things to try

Try this after installation

After installing node try to do this-
Save the following in script.js file

console.log("I am a Node program");

Running the terminal command node script.js in the same folder as script.js will start Node, print I am a Node program to the terminal window, and exit, as the script file has finished execution.