Lakhveer Singh Rajput Blog's: 🌟 Insights on Tech, Coding, and Personal Growth 🚀💡

TypeScript is more than JavaScript with types . Used properly, it becomes a powerful engineering tool for building large-scale applications that are easier to maintain, refactor, test, optimize, and scale. The real power of TypeScript appears when you move beyond basic types like string , number , and interface and start using generics, discriminated unions, type narrowing, utility types, template literal types, satisfies , branded types, exhaustive checking, and compiler-driven design . Let’s explore the hacks that separate a TypeScript beginner from a TypeScript Pro Developer . 🧠⚡ 🧩 1. Prefer unknown Over any One of the biggest TypeScript mistakes is using any whenever the compiler complains. ❌ Weak approach function parseResponse ( data: any ) { return data. user . name ; } You’ve effectively disabled TypeScript. ✅ Pro approach function parseResponse ( data: unknown ) { if ( typeof data === "object" && data !== null && "user...

⚛️ ReactJS Principles for Optimized Code 🚀 Write Less. Render Smarter. Ship Faster. React makes it incredibly easy to build interfaces — but writing React code that works is not the same as writing React code that scales . As applications grow, small decisions around component structure, state, effects, rendering, data fetching, and JavaScript can turn into major performance problems. This guide covers the principles, patterns, functions, optimization techniques, hacks, and common mistakes that help you write clean, predictable, maintainable, and high-performance React applications . 🧠 1. The Golden Principle: Optimize the Architecture First Before thinking about useMemo() , useCallback() , or lazy loading, ask: “Why is this component rendering in the first place?” A well-designed React application naturally requires fewer optimizations. ❌ Poor architecture function App ( ) { const [search, setSearch] = useState ( "" ); const [theme, setTheme] = useState ( "dark...