FRONTEND S06 L10 React Implementing useEffect

📘 REACT IMPLEMENTING USEEFFECT In this lesson, we fully implement useEffect for real side-effect management in the button component. You will conditionally register and remove a keyboard listener based on active state, then verify cleanup during state transitions and component unmounting. 🎯 IN THIS VIDEO Replace temporary effect logging with real listener setup logic Add conditional effect behavior based on active state Keep effect and cleanup logic inside component scope where state is available Register keyboard listeners only when active is true Skip registration when active is false Remove listeners during cleanup before the next effect cycle Confirm cleanup also runs on component unmount Validate final behavior with console traces and key press tests 🚀 HOW TO USE THIS COURSE This lesson completes the side-effect lifecycle pattern you will reuse across APIs, timers, subscriptions, and browser integrations in React. It gives you a safe, predictable model for setup and teardown across renders. 👉 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 A reliable effect pattern is: check whether setup is needed, set it up, and always return a cleanup function that can safely run multiple times.