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JavaScript is single-threaded, which means it can only do one thing at a time. But web servers need to handle hundreds of requests simultaneously. That's where asynchronous code comes in — it lets you
You'll see sessions, JWT, and cookies mentioned together a lot, but they're not the same thing. A session is how you track a user. A cookie is how you deliver that tracking. JWT is an alternative way
Every app lets users upload files. You need to store them and make them accessible. Local storage is simple but doesn't scale. Cloud storage scales but costs money. Pick wrong and you'll either run ou
Every URL tells a story. Part of that story is built into the path itself. Another part is hidden in the query string. Learn the difference and you'll write cleaner, more predictable APIs. This is abo
Node.js runs on a single thread. This seems impossible. How can one thread handle thousands of requests? The answer is the event loop and a clever design pattern. Understand this and Node.js's power b
Node.js is JavaScript outside the browser. You can run JavaScript on your computer, on servers, and in the cloud. Getting started is simpler than you think. This guide walks you through everything fro
