DVDev Vaghelainweb-dev2026.hashnode.dev·May 10 · 15 min readUnderstanding JWT Authentication: How Tokens Replace SessionsEvery application that stores user data faces the same problem. How do you know who is making a request? When someone logs in with a username and password, the server needs a way to remember that this00
DVDev Vaghelainweb-dev2026.hashnode.dev·May 10 · 9 min readHow Multer Handles File Uploads in ExpressIf you have ever tried to read a file directly from req.body in Express, you know it does not work. The body parser that handles JSON and form strings chokes on binary file data. That is not a bug. It00
DVDev Vaghelainweb-dev2026.hashnode.dev·May 10 · 10 min readWhat Is a REST API? A Practical Guide for Developers Who Build Web ServicesIf you have ever integrated a third-party service into your application, chances are you used a REST API. Stripe for payments, GitHub for repository data, Twilio for messages. They all expose their fu00
DVDev Vaghelainweb-dev2026.hashnode.dev·May 10 · 7 min readHandling Image Uploads in Express: Where Files Actually GoEvery tutorial shows you how to send a file from a form to an Express server. Few of them pause to answer the obvious next question: where does the file actually live after it lands on your server? An00
DVDev Vaghelainweb-dev2026.hashnode.dev·May 10 · 10 min readUnderstanding Express Middleware: The Pipeline That Powers Your ServerIf you have written even a basic Express application, you have already used middleware without realizing it. That app.use(express.json()) line you added to parse request bodies? Middleware. The route 00
