React Key Concepts

An in-depth guide to React's core features

Maximilian Schwarzmüller

• Publisher: De Gruyter
• Year: 2025
• eBook ISBN: 9781836202264
• Topic: Computer Science
• Index: Computer Science

Confidently implement React in your next project with this in-depth overview of React's core features – now updated for React 19. Purchase of the print or Kindle book includes a free PDF ebook and bonus content from the author.

Key Features

• Work through clear, concise explanations of core React 19 functionalities
• Complete practical exercises that challenge you to build your own simple apps
• Discover fullstack React with Next.js, React Server Components, Suspense, and more

Book Description

Maximilian Schwarzmüller is a bestselling instructor who has helped more than three million students worldwide learn how to code. His bestselling React video course, "React – The Complete Guide", has over nine hundred thousand students on Udemy. Max has written this quick-start reference that distills the core concepts of React. Simple explanations, relevant examples, and step-by-step derivations make this guide the ideal resource for busy developers. In this second edition, Max guides you through changes brought by React 19, including the new use() hook, form actions, and how to think about React on the server. This book will support you through your next React projects in giving you a behind-the-scenes understanding of the framework – whether you've just finished Max's video course and are looking for a handy reference, or you're using a variety of other learning materials and need a single study guide to bring everything together. You'll find full solutions to all end-of-chapter quizzes and exercises in the book's GitHub repository.

What you will learn

• Build modern, user-friendly, and reactive web apps
• Create components and utilize props to pass data between them
• Handle events, perform state updates, and manage conditional content
• Add styles dynamically and conditionally for modern user interfaces
• Use advanced state management techniques such as React's Context API
• Utilize React Router to render different pages for different URLs
• Understand key best practices and optimization opportunities
• Learn about React Server Components and Server Actions

Who this book is for

This React book is for developers who have prior experience with, or who are currently learning, the basics of React. You can use this book as a standalone resource to consolidate your understanding or as a companion guide to other courses. To get the most value from this book, you should have a basic understanding of the fundamentals of JavaScript, HTML, and CSS.

Table of contents

• Cover
• Copyright Page
• Contributors
• Table of Contents
• Preface
• Chapter 1: React – What and Why
• Chapter 2: Understanding React Components and JSX
• Chapter 3: Components and Props
• Chapter 4: Working with Events and State
• Chapter 5: Rendering Lists and Conditional Content
• Chapter 6: Styling React Apps
• Chapter 7: Portals and Refs
• Chapter 8: Handling Side Effects
• Chapter 9: Handling User Input & Forms with Form Actions
• Chapter 10: Behind the Scenes of React and Optimization Opportunities
• Chapter 11: Working with Complex State
• Chapter 12: Building Custom React Hooks
• Chapter 13: Multipage Apps with React Router
• Chapter 14: Managing Data with React Router
• Chapter 15: Server-side Rendering & Building Fullstack Apps with Next.js
• Chapter 16: React Server Components & Server Actions
• Chapter 17: Understanding React Suspense & The use() Hook
• Chapter 18: Next Steps and Further Resources
• Packt Page
• Other Books You May Enjoy
• Index