S06 L06 React useState (State Updates and Re-rendering)

📘 REACT USESTATE — STATE UPDATES AND RE-RENDERING In this lesson, we replace a plain local counter variable with real React state using useState. You will learn how useState provides both the current state value and a setter function, and how state updates trigger React re-renders automatically. 🎯 IN THIS VIDEO Recap why local variables fail for persistent interactive UI state Import and call useState from the React library Initialize component state with a default value Read current state value returned from useState Use the state setter function to request updates See automatic re-render behavior after state updates Use a functional updater pattern to derive the next state from the current state Apply array destructuring for concise React state syntax 🚀 HOW TO USE THIS COURSE useState is one of the most important React concepts and appears throughout component development. Understanding this pattern now makes later lessons on effects, props, and shared state much easier. 👉 Course Website: www.richardbraycourses.co.uk 👉 Course Repositories: www.github.com/RichardBrayCourses 👉 Full course playlist: https://youtube.com/playlist?list=PLNlOxdq7xu14b5ewH4IJC9tMinkgZBuVR&si=Pg8pEDR5UUbQstz6 📂 SECTION REPOSITORY Section 6 repository: https://github.com/RichardBrayCourses/frontend06-react 💡 NOTE When new state depends on previous state, use the functional updater form so updates are based on the latest available value.