React State Tutorial: Build a Course Filter
Web Development Learning Series — Part 6 of 10 · Intermediate to Advanced React is useful when a page has several connected interactive views. The challenge is often deciding what the application needs to remember. This lesson builds a difficulty filter for a course catalog and keeps the state small. Use an existing React learning project or the official documentation's interactive editor. This example is a component, not a complete installation guide. You should already know JavaScript arrays, functions, and basic JSX.