Read Time: ~14 minutes | Building on React fundamentals to master state management at scale Prerequisites : Familiarity with React basics, useState, useEffect (Part 1) 🔗 Series Navigation 📌 What You'll Learn By the end of this guide, you'll understand: ✅ Creating powerful custom hooks ✅ When and how to use useReducer ✅ Managing state globally with Context API ✅ Redux fundamentals and when to use it ✅ Modern alternatives: Zustand and Jotai ✅ Choosing the right pattern for your project ✅ Real-world shopping cart implementation 🎣 Custom Hooks: Reusing Logic Across Components Custom hooks are regular JavaScript functions that let you extract component logic into reusable functions. They're one of the most powerful React patterns. Rule #1: Custom Hooks Must Start with "use" // ✅ Correct - starts with "use" function useFormInput ( initialValue ) { const [ value , setValue ] = useState ( initialValue ); return { value , bind : { value , onChange : e => setValue ( e . target .…