🤯 TypeScript Things That Will Surprise You — Deep Concepts Every Pro Developer Should Know
🤯 TypeScript Things That Will Surprise You — Deep Concepts Every Pro Developer Should Know TypeScript often looks like “JavaScript with types.” But once you go beyond interfaces, string , number , and boolean , TypeScript becomes a surprisingly powerful type-level programming language . You start discovering things like: 🤯 Types that exist only at compile time 🧠 Functions that can determine types dynamically 🔥 never being more useful than you expect 🪄 Types that behave differently depending on context 🧩 unknown being safer than any 🎯 Literal types that can completely change API design 🧬 Conditional and mapped types 🛡️ Exhaustiveness checking ⚡ Structural typing 🧠 Type narrowing through control flow 💥 Situations where TypeScript intentionally allows unsafe behavior Let’s explore the TypeScript concepts that can genuinely surprise you — and the principles professional developers should follow. 🧠 1. TypeScript Types Don’t Exist at Runtime This is probably the first major sur...