Most Vue tutorials teach you how to use Vue. Very few teach you how Vue behaves in real production systems. After working on large-scale frontend applications — especially in fintech products where state, performance, and maintainability matter — I’ve realised that the biggest difference between beginner and senior Vue developers is not syntax. It’s how they think about: Reactivity State ownership Component boundaries Data flow Architecture So I decided to compile 30 practical Vue nuggets pulled from real-world experience building production applications with Vue and Nuxt. Not theory. Not tutorial fluff. Just lessons that consistently matter when applications grow. 🟢 1. ref vs reactive — they solve different problems One of the earliest Vue mistakes is using reactive for everything. The mental model is simple: Use ref for single values Use reactive for structured objects ref exists because primitives cannot be proxied like objects.…