Tutorials, stack comparisons, tool reviews, and productivity tips — code that ships.
A single slow query can exhaust your entire Postgres connection pool in under a minute, cascade to every endpoint, and take your service down. Here is how to set per-query timeouts with statement_timeout, cancel hung queries with AbortSignal, and handle the 57014 error before it becomes a pager alert.
A user-facing notification system is the kind of feature every SaaS builds twice: once as a quick loop of raw SQL and process.send, and once as a proper delivery engine after the batch sender hits a rate limit and silently drops a thousand critical alerts. Here is the production-grade Node.js notification engine that handles channel routing, template rendering, idempotency, rate limiting, and delivery tracking across email, push, and in-app channels.
Your dashboard needs live updates, your build pipeline needs progress streams, and your users want to know when something happens without refreshing the page. Here is how to build it with Server-Sent Events: 30 lines of server code, the EventSource API on the client, and Redis pub/sub so it actually scales past one server instance.
Your Node.js event loop stalls on CPU-heavy work, and eval() is too dangerous for running untrusted user code. WebAssembly gives you near-native speed with a sandboxed memory model and pluggable modules compiled from Rust, C, or Go. Here is how to integrate WASM into a production Node.js service.
Most Node.js codebases either hardwire every dependency or import a heavyweight DI framework and regret it. This post shows three practical DI patterns with working code: a manual wiring function, a lightweight factory-based container, and function-scoped injection. Pick the pattern that fits your project size.
Adding Redis to your infrastructure stack just for session storage adds operational complexity, memory pressure, and a new failure mode. Here is a production-grade session store built on PostgreSQL with row-level locking, lazy cleanup, and session rotation that handles 10,000 concurrent users without breaking a sweat.
JavaScript Date is broken. Timezone bugs, daylight saving time surprises, and ambiguous date math cost teams hours every sprint. Here is how to use the Temporal API with the production-ready polyfill today, with patterns for timezone-aware scheduling, duration math, and calendar-safe date handling.
Your Astro site scores 95+ on Lighthouse until you add a navbar dropdown. Then it tanks. Here is how to use client directives, component islanding, and framework-agnostic patterns to keep interactivity without the JavaScript bloat.
Your API returns JSON for everyone, but mobile clients on slow networks want MessagePack, internal services negotiate Protobuf, the browser cache serves HTML for a JSON request because Vary is missing, and the fix is three request headers and one response header you have been ignoring.
You reach for Babel, ts-node, or an entire build pipeline just to import a .ts file, mock a dependency in tests, or add request tracing. Node.js has built-in hooks for all of this since v18, and most teams do not know they exist. This post builds three loaders from scratch and shows you exactly when to use them.