Tutorials, stack comparisons, tool reviews, and productivity tips — code that ships.
A practical guide to running Node.js containers with least privilege: dropping Linux capabilities, switching to a non-root user, enabling read-only root filesystems, and applying seccomp profiles so a container breakout is significantly harder.
WebSocket connections live longer than HTTP requests, which means your JWT that was valid at connect time may be expired or revoked while the socket is still open. Here is how to authenticate WebSocket handshakes, validate authorizations per-message, and handle token rotation without killing active connections.
ESLint v9 makes flat config the default and deprecates .eslintrc. This is a breaking change in how you configure linting. Here is the migration path with a working config that covers TypeScript, React, imports, and Prettier integration.
Node.js ships a built-in fetch since v18, but it does not handle timeouts, streaming, or HTTP errors the way production code needs. Here is a zero-dependency HTTP client class that wraps fetch with every safeguard your API calls require.
A practical guide to running WebSocket servers across multiple instances using Redis Pub/Sub, including connection management, session routing, and message delivery patterns that actually work in production.
A cache write is missing, a database row is corrupted, a WebSocket state machine is stuck in limbo. These are not flaky infrastructure problems. They are JavaScript race conditions, and they follow predictable patterns. Here is how to spot, reproduce, and fix the five most common async race patterns in Node.js and the browser.
Your package.json `exports` field is either missing, wrong, or silently ignored by some consumers and not others. Here is the complete guide to conditional exports, subpath patterns, TypeScript resolution, and the migration path from the old `main` field.
One thrown exception in a hot path can deoptimize your entire function in V8. Here is the benchmark data that proves it, the Result type pattern that avoids the tax, and the 50-line implementation you can drop into your project today.
Fire off 10,000 concurrent API calls and you get rate-limited, OOM-killed, or both. Batch them with Promise.all and one slow item blocks the whole batch. Here is the promise-pool pattern with backpressure and abort signals that gives you full control over concurrent async work.
Async generators let you build composable, memory-efficient data pipelines that handle datasets larger than RAM, with better testability and simpler error semantics than Node.js streams. Here is the pattern for pagination, transformation, fan-out, and backpressure in production.