Knowledge Base & Insights
Personal Blogs
Deep dives into system architecture, frontend performance, and the journey of building software products.
Sessions vs JWT vs Cookies: Understanding Authentication Thoroughly
Learn the difference between sessions, JWT, and cookies in modern authentication systems. This beginner-friendly guide explains stateful vs stateless authentication, session-based login, JWT token authentication, browser cookies, and when to use each authentication approach in real-world applications.
JWT Authentication in Node.js Explained Simply
Learn JWT authentication in Node.js with beginner-friendly examples and real-world analogies. This guide explains JSON Web Tokens, token structure, login flow, protected routes, middleware validation, and how stateless authentication works in Express applications.
What is Middleware in Express and How It Works
Learn what middleware is in Express.js and how it works inside the request-response lifecycle. This beginner-friendly guide explains middleware types, execution order, the next() function, and real-world examples like logging, authentication, and request validation.
Storing Uploaded Files and Serving Them in Express
Learn how uploaded files are stored and served in Express.js using static file serving and upload folders. This beginner-friendly guide explains local vs external storage, accessing uploaded files via URLs, and important file upload security practices.
URL Parameters vs Query Strings in Express.js
Learn the difference between URL parameters and query strings in Express.js with beginner-friendly examples and real-world analogies. This guide explains route params, query parameters, req.params, req.query, and when to use params vs query strings in APIs and web applications.
How Node.js Handles Multiple Requests with a Single Thread
Learn how Node.js handles multiple requests using a single thread with the help of the event loop and asynchronous non-blocking architecture. This beginner-friendly guide explains concurrency, worker threads, and why Node.js scales so efficiently for modern web applications.
Creating Routes and Handling Requests with Express
Learn how to create routes and handle requests in Express.js with beginner-friendly examples and real-world analogies. This guide explains GET and POST routes, request and response objects, route parameters, and the Express request-response lifecycle.
Setting Up Your First Node.js Application Step-by-Step
Learn how to set up your first Node.js application step-by-step. This beginner-friendly guide explains Node.js installation, checking setup with terminal, understanding REPL, running JavaScript files, and building your first Hello World server.
The new Keyword in JavaScript
Learn how the new keyword works in JavaScript with beginner-friendly examples and real-world analogies. This guide explains constructor functions, object creation, prototype linking, instances, and the internal process behind JavaScript object instantiation.