Hello React! 👋
Welcome to Interactive React! In this course, you'll learn React by doing - editing real code and seeing instant results.
What is React?
React is a JavaScript library for building user interfaces. It was created by Facebook (now Meta) in 2013 and has become one of the most popular frontend tools.
Why React?
- Component-Based: Build small, reusable pieces
- Declarative: Describe what you want, not how to do it
- Fast: Virtual DOM makes updates efficient
Your First Component
A React component is just a function that returns JSX (HTML-like syntax in JavaScript).
Try editing the code in the playgrounds below - your changes appear instantly!