9 articles found
Middleware is how Express works. Not just a feature of it -- it is the whole thing. This is the talk I give to every new hire: the five middleware types, execution order, why next() trips everyone up, async error handling, and the patterns we actually use in production.
Design patterns get a bad rap, but a handful of them genuinely earn their keep in JavaScript. This opinionated walkthrough covers seven patterns — module, observer, singleton, factory, strategy, decorator, and facade — with honest takes on which ones I actually reach for in real code and which ones mostly live in textbooks.
Generics separate TypeScript beginners from everyone else. Here are the patterns you'll actually reach for in real codebases, explained without the academic fluff.
I put off learning TypeScript decorators for a long time. They looked like unnecessary magic. Then I actually used them on a real project -- and changed my mind. This guide walks through every type of decorator with real-world examples, from Express route handlers to validation patterns.
I spent way too long going back and forth on enums versus union types. Here's where I landed after trying both in real projects, covering numeric enums, string enums, const enums, as const patterns, and the actual runtime differences that matter when you're shipping code.
I burned a lot of hours on cache invalidation before I figured out which Redis patterns actually hold up under load. Here's what I settled on after running caching in production across several Node.js services.