Redux: Complete Guide from Zero to Hero

Redux & React-Redux: Complete Deep Dive 🚀 Let me break this down from absolute basics to advanced, the way you'd explain it confidently in an interview. 🧠 The Core Problem Redux Solves Imagine a React app with 50 components. Component A needs data that lives in Component Z. Without Redux, you'd have to pass props down through every component in between — this is called prop drilling, and it's a nightmare. Redux gives you a single global store — think of it as a big JavaScript object that any component can read from or write to directly. 🏛️ The 3 Sacred Principles of Redux Single source of truth — the entire app state lives in ONE store object State is read-only — you can NEVER directly mutate state (state.name = "John" ❌) Changes are made with pure functions — those functions are called reducers 🔑 Core Building Blocks Store The single JavaScript object holding your entire app's state. jsimport { createStore } from 'redux'; const store = createStore(rootReducer); store.getState() // Rea