Security

No rate limiting means any client can hit your API as many times as it wants. This guide walks through the right way to implement it in Node.js - from express-rate-limit basics to Redis-backed sliding windows and layered per-route limits that work in production.

Stop fighting CORS. Understand preflight requests, credentials, wildcard mistakes. CORS isn't a bug—it's your API warning you about real security issues.

Most developers think session hijacking is an advanced attack. It's not. It usually starts with something very basic: your cookies. Learn the 3 flags and token refresh pattern that actually works.