WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedYou open WhatsApp, type a message, and hit send. A single grey tick appears. You're on a train with no signal, but the message went through anyway. Or did it? That single tick is the beginning of a suMay 31, 2026·8 min read
Sessions vs JWT vs Cookies: Understanding Authentication ApproachesYour application needs to know who's accessing it. When a user logs in, you need to remember they're authenticated so they don't have to log in again for every request. There are three main ways to doMay 4, 2026·6 min read
REST API Design Made Simple with Express.jsAPIs are how applications communicate. A REST API is a structured way to request and receive data over HTTP. Building REST APIs is one of the most common uses for Express. What is an API? An API (ApplMay 3, 2026·8 min read
Handling File Uploads in Express with MulterUsers need to upload files: profile pictures, documents, resumes, attachments. Handling this in Express requires special handling. A library called Multer makes it straightforward. Why File Uploads NeMay 2, 2026·6 min read
Storing Uploaded Files and Serving Them in ExpressUsers need to upload files to your application. Maybe they're uploading profile pictures, documents, or media. Once you store these files, you need to serve them back to users. This requires understanMay 1, 2026·6 min read
URL Parameters vs Query Strings in Express.jsYour API needs to receive data from users. Express lets you pass data through the URL in two different ways: URL parameters and query strings. They look different, work differently, and have differentApr 29, 2026·6 min read
What is Middleware in Express and How It WorksMiddleware sits between incoming requests and your route handlers. It intercepts requests, does something with them, and either passes them along or stops them. Understanding middleware is key to builApr 27, 2026·6 min read
