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Articles tagged with #programming-blogs
How does a server know who you are on every request? Many beginners think the server remembers them after login. That's not true. HTTP is stateless. Every request arrives like a stranger, with no memo
Where do uploaded files go after Multer saves them? Many beginners think an uploaded file lives inside the request, or inside the database. That's not true. A file is just bytes written to a disk. You
Why can't Express read a file upload on its own? You build a form with a file input. You submit it. You log req.body. It is empty. Many beginners think Express is broken or that it express.json() shou
What does "REST API" actually mean? Many beginners think REST is a library or a framework you install. That's not true. REST is a set of rules for how a client and a server talk to each other over HTT
How does Express know which user you want, and how do you filter the results? You open /users/42 and get one user. You open /search?q=laptop&sort=price and get a filtered list. Both look like normal U
Why Does Everyone Use Express Instead of Plain Node.js? Many beginners think Express is some separate framework that replaces Node.js entirely - like choosing React instead of vanilla JavaScript. That
