NodeJS Application Overview

What Is Node.js?

Node.js is a JavaScript runtime built on Google’s high-performance V8 engine. It lets you run JavaScript outside the browser, so you can build server-side apps, CLI tools, and more—all with the same language you use in the browser. Node.js supports Windows, macOS, and Linux.

For production environments, use the Long-Term Support (LTS) version of Node.js. Manage multiple versions easily with tools like nvm.

Node Package Manager (npm)

When you install Node.js, you also get npm—the package manager that helps you discover, install, and manage JavaScript libraries and dependencies. With npm you can:

Share code with the community via the npm registry

Install and update packages with a single command

Define project scripts for testing, building, and running your app

Sample Node.js Project Structure

A minimal Node.js project often includes these three files:

File	Purpose
package.json	Metadata (name, version) and dependency definitions
index.js	Application entry point and core logic
test.js	Automated tests for your code

To set up your project:

# Install all dependencies listed in package.json
npm install

After installation, npm creates a node_modules folder with all packages you need.

Common npm Commands

Command	Description
npm install	Install project dependencies
npm test	Run tests defined in `test.js`
npm start	Launch the application (e.g., server)

# Verify your environment
$ node -v
v18.16.0
$ npm -v
9.8.1

# Install dependencies
$ npm install

# Run tests
$ npm test

# Start the application
$ npm start
App listening on port 3000

Once the application is running, open your browser and navigate to http://localhost:3000.

Introduction and Basics

Jenkins Setup and Interface

Extending Jenkins and Administration

Jenkins Pipelines

Automation and Security

Setting up CI Pipeline

Code Quality and Testing

Containerization and Deployment

Kubernetes and GitOps

AWS Lambda and Advanced Deployment Techniques

Jenkins Administration and Monitoring - Part 1

Shared Libraries in Jenkins

Agents and Nodes in Jenkins

Pipeline Enhancement and Caching

Pipeline Structure and Scripted vs Declarative

Jenkins Administration and Monitoring - Part 2

Backup and Configuration Management

NodeJS Application Overview

What Is Node.js?

Node Package Manager (npm)

Sample Node.js Project Structure

Common npm Commands

Links and References

Watch Video

​What Is Node.js?

​Node Package Manager (npm)

​Sample Node.js Project Structure

​Common npm Commands

​Links and References

Watch Video

What Is Node.js?

Node Package Manager (npm)

Sample Node.js Project Structure

Common npm Commands

Links and References