PrashantSathe

Taking your Node.js application from development to production requires careful planning. This guide covers all major deployment approaches with best practices for each. 1. Deployment Target Options Traditional Servers Platform as a Service Serverless 2. Preparing for Deployment Environment Configuration Production Dependencies 3. Process Management PM2 (Recommended) Systemd (Linux) 4. Deployment to Heroku Step-by-Step Process […]

Robust testing is essential for maintaining reliable Node.js applications. This guide covers unit, integration, and end-to-end testing with modern JavaScript testing tools. 1. Testing Pyramid Overview Unit Tests Integration Tests E2E Tests 2. Testing Setup with Jest Basic Configuration Basic Test Example 3. Testing Asynchronous Code Callbacks Promises 4. Mocking Dependencies Manual Mocks Jest Automatic

Proper error handling and debugging are essential skills for Node.js developers. This guide covers everything from basic error patterns to advanced debugging techniques. 1. Node.js Error Types Built-in Error Types Common Operational Errors 2. Basic Error Handling Patterns Try/Catch Blocks Error-First Callbacks Promise Error Handling 3. Advanced Error Handling Custom Error Classes Global Error Handler

Implementing secure authentication is crucial for any production Node.js application. This guide covers JWT, sessions, OAuth, and security best practices. 1. Authentication Strategies Session-Based Token-Based (JWT) OAuth/Third-Party 2. JWT Authentication Implementation Setup and Configuration User Registration 3. Login and Token Generation 4. Protecting Routes with Middleware Auth Middleware Role-Based Access 5. Session-Based Authentication Setup with

Databases are essential for persistent data storage in Node.js applications. This guide covers MongoDB (NoSQL) and PostgreSQL (SQL) integration with best practices for production applications. 1. Database Options in Node.js NoSQL Databases SQL Databases 2. MongoDB with Mongoose Setup and Connection Defining Schemas and Models 3. CRUD Operations with Mongoose Create Read Update Delete 4.

Middleware functions are the backbone of Express applications, handling everything from request processing to authentication. This guide will transform you into a middleware expert. 1. What is Middleware? Key Characteristics Basic Structure 2. Types of Middleware 1. Application-Level Middleware 2. Router-Level Middleware 3. Error-Handling Middleware 4. Built-In Middleware 5. Third-Party Middleware 3. Middleware Execution Flow

RESTful APIs are the backbone of modern web applications. This guide will walk you through building a complete REST API using Express.js with proper architecture and best practices. 1. REST Fundamentals REST Principles HTTP Methods 2. Basic API Structure 3. Proper Resource Routing Route Organization 4. CRUD Operations Implementation 5. Request Validation and Sanitization Manual

Express.js is the most popular web framework for Node.js, simplifying server creation with powerful features for web and mobile applications. Let’s explore its core concepts. 1. Why Use Express.js? Key Benefits Comparison 2. Basic Express Application 3. Core Express Concepts Routing Middleware 4. Serving Static Files 5. Handling Different Response Types Response Type Method Example

Node.js provides powerful file system capabilities through the fs module. This guide covers everything from basic file operations to advanced streaming. 1. FS Module Overview Synchronous vs Asynchronous Common Use Cases 2. Basic File Operations Reading Files Writing Files 3. Working with Directories 4. File Metadata and Stats 5. Streaming Large Files Read Stream Write

Node.js’s asynchronous nature is its superpower. This guide will help you understand callbacks, promises, and async/await – the three pillars of async programming in Node.js. 1. Understanding the Node.js Event Loop The event loop is what enables Node.js to handle thousands of concurrent connections with a single thread: 2. Callback Pattern (The Original Approach) Callback