React is the most popular library for building user interfaces on the web, and this guide will take you from never having written a component to shipping a real app. It is up to date for 2026 and 2027, which means modern React 19, function components and hooks, Vite, Server Components, TypeScript, testing, and everything in between. Every code listing has been run against the latest versions.
If you aren't sure where to begin, start with Your React Learning Path. It explains what to learn, in what order, and how long each stage tends to take. After that, work your way down the Basics section, or jump to whatever you need. The tutorials are ordered so that each one builds on the one before it.
These tutorials are updated regularly to keep up with how React is written today. If you prefer holding something in your hands, there is also a book about React. It was written for React 16, so the fundamentals still apply, but the code in it (such as class components) is older than the code you will find here.
Ready to put these ideas to work? Our React quizzes focus on reviewing component boundaries, state, effects, and the assumptions behind a working interface.
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