29 articles tagged with ""express""
Your users shouldn't stare at a spinner while you send a welcome email. Learn how to offload slow work to background jobs with BullMQ and Redis.
You wouldn't fill a bathtub before washing your hands. So why are you loading a 2GB file into memory before sending it to a client? Node.js Streams are here to save your RAM — and your sanity.
Every unvalidated request is a ticking time bomb. Learn how to use Zod to add bulletproof, type-safe validation to your Express APIs — and sleep soundly at night.
Every Express request passes through a chain of middleware functions before getting a response. Understanding how that chain works — and how to build your own — turns spaghetti apps into clean, maintainable systems.
Ctrl+C your Node.js server and you might be dropping database connections, cutting off active requests, and losing in-flight jobs. Here's how to shut down like a professional instead of a villain.
Every time you change your API without versioning, a developer somewhere cries. Learn how to version your Express API properly so your users don't wake up to a broken integration at 3am.
Without rate limiting, your API is an open bar with no last call. Learn how to implement rock-solid rate limiting in Express before one angry user (or bot) takes down your entire service.
You've been sprinkling console.log like parmesan on every bug. There's a built-in debugger in Node.js that's been sitting there this whole time, judging you.
Your Express API crashes, your users see a wall of Node.js internals, and somewhere a hacker is taking notes. Let's fix error handling once and for all with centralized middleware, typed errors, and zero information leakage.
console.log is a lie you tell yourself in development. Here's how structured logging with Pino transforms your Node.js app from a black box into a system you can actually debug at 3am.
Your server restarts 50 times a day, and every restart kills in-flight requests. Here's how to shut down gracefully so users never notice.
Your API is probably sending 5-10x more data than it needs to. Learn how gzip and Brotli compression in Node.js can slash your bandwidth costs and make your app feel snappy — with three lines of code.
Webhooks are the backbone of modern integrations — but most devs get them wrong. Learn how to receive, verify, and process webhooks in Node.js without losing your mind (or your data).
Node.js is single-threaded — but your server has 8 cores. Learn how to use the cluster module to run multiple Node.js processes and actually use all that hardware you're paying for.
Every time your Express app opens a fresh database connection per request, a DBA somewhere cries. Learn how connection pooling works, why it matters, and how to configure it properly before your database gives up on you.
Still hammering your server with HTTP requests every second to fake real-time? Let's fix that. Here's how WebSockets work in Node.js and why your users will thank you.
Node.js is single-threaded — until it isn't. Worker Threads let you run CPU-heavy code in parallel without spinning up new processes. Here's how to use them correctly.
You've seen the pattern: requestId threads through every function signature like a bad cold that just won't quit. AsyncLocalStorage fixes this elegantly — here's how.
Every time you SIGKILL your Node.js server, you're mid-conversation at a restaurant when the lights go out. Here's how to let your server finish what it started before dying with dignity.
Express gives you a blank canvas and infinite rope to hang yourself with. Coming from Laravel, I learned this the hard way when my 'quick' Node.js API turned into a 900-line app.js monster. Here's the structure I wish someone had shown me.
Your webhook endpoint is wide open and anyone can POST fake events to it. Here's how to verify signatures in Node.js/Express so only legitimate providers can trigger your code.
You know that feeling when userId shows up in a function parameter, then the caller, then the caller's caller, and suddenly it's req.user all the way down six layers? Node.js has had a fix for this since v16. Nobody told you.
OFFSET pagination feels fine until page 500 brings your database to its knees. Here's how cursor-based pagination works, why it's faster, and how to implement it in Express.
Your Express API trusts whatever JSON the client sends. That's cute. Let's fix it with Zod — the schema validation library that'll save you from yourself.
Sending emails inside a request handler? Resizing images on the main thread? Let's talk about BullMQ — Redis-backed job queues that'll save your API response times and your sanity.
One flaky microservice shouldn't bring down your whole platform. The circuit breaker pattern is your safety net — here's how to implement it in Node.js and finally build resilient APIs.
Without rate limiting, your API is an open bar with no closing time. Learn how to add the bouncer that keeps your server alive when traffic goes sideways.
Your deployment restarts Node.js. 200 users mid-checkout get a connection reset. Their carts vanish. You are the villain. Here's how to not be the villain.
Think middleware is just app.use() and you're done? Cool! Now explain why your Express server randomly hangs. Let's dive into the middleware gotchas that bite every Node.js developer - from memory leaks to silent failures!