React Key Concepts: An in-depth guide to React's core features , Second Edition

Maximilian Schwarzmüller

S$67.99

4.8 (4 Ratings)

Paperback Jan 2025 544 pages 2nd Edition

Maximilian Schwarzmüller

S$67.99

4.8 (4 Ratings)

Paperback Jan 2025 544 pages 2nd Edition

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React Key Concepts

Summary and Key Takeaways

React is a library, though it's actually a combination of two main packages: react and react-dom.
Though it is possible to build non-trivial user interfaces without React, simply using vanilla JavaScript to do so can be cumbersome, error-prone, and hard to maintain.
React simplifies the creation of complex user interfaces by providing a declarative way to define the desired end state(s) of the UI.
Declarative means that you define the target user interface content and structure, combined with different states (e.g., "is a modal open or closed?"), and you leave it up to React to figure out the appropriate DOM instructions.
The react package itself derives UI states and manages a virtual DOM. It's "bridges" like react-dom or react-native that translate this virtual DOM into actual UI (DOM) instructions.
With React, you can build Single Page Applications (SPAs), meaning that React is used to control the entire user interface on all...

What Does React Do with All These Components?

If you follow the trail of all components and their import and export statements to the top, you will find a root.render(...) instruction in the main entry script of the React project. Typically, this main entry script can be found in the main.jsx file, located in the project’s src/ folder. This render() method, which is provided by the React library (to be precise, by the react-dom package), takes a snippet of JSX code and interprets and executes it for you.

The complete snippet you find in the root entry file (main.jsx) typically looks like this:

import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App.jsx';
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<App />);

The exact code you find in your new React project might look slightly different.

It may, for instance, include...

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Key benefits

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

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.

Who is this book 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.

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

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Jonathan Reeves Jan 24, 2025

If you are new to React or an experienced developer seeking to stay updated on the latest trends and best practices, "React Key Concepts" is an invaluable resource. This book provides comprehensive guidance on utilizing essential libraries, such as react-router-dom, effectively. I highly recommend this book, as it has proven to be a significant asset in my daily work as a React developer.Max, an exceptional instructor, demonstrates extensive knowledge of the subject matter. Having previously taken his courses on Udemy, I appreciate his engaging writing style, which keeps the reader captivated and eager to learn more. The book effectively combines theoretical concepts with numerous code examples and snippets, facilitating a deeper understanding of the material.For anyone looking to enhance their grasp of React's core concepts, "React Key Concepts: An In-Depth Guide to React's Core Features" is an excellent choice.I just received my paperback copy and I have to say this book is just an amazing resource for anyone that uses React for work or even if you are just starting your journey. What a great resource. Read more

Amazon Verified review

Aram Jan 28, 2025

I've got the chance to read this book from an Advanced Reader's Copy shared with me by the Publisher.It is a great resource to complement your learning journey in building modern web apps.This book will teach you every essential concept in React.Highly important topics are covered in details, such as:- Components and JSX- Passing and consuming props for reusability- Building interactive UIs with Events, State and Hooks- Lists Rendering and displaying conditional content- Styling React with CSS and styling libraries- Accessing DOM values with refs- Building SPA using React Router- Form Actions to handle user input- Handling complex state- Best practices and optimizations in ReactOne of the most important topics that is covered in detail is the side effects.Tasks such as calling external APIs, accessing browser storage, and other similar tasks are considered side effects and should be handled correctly to avoid issues with React’s component rendering lifecycle.Another equally important topic, Context API - a modern way to pass props deeply into components, is also covered extensivelyBoth of these topics have been my favourite read on this amazing book.The author even goes beyond the frontend, and taps into building full stack web applications by using the popular Next.js: A powerful react-based framework to allow you build server-side rendered react apps.The book has recently been released with the announcement of the latest version of React 19, so you don’t need to worry about missing learning the new features as well.Recent features including use() hook, form actions, and how to think about React on the server, are all covered.The book is full of screenshots and code snippets to better simplify your learning experience.Also I really like how there are exercises and quizzes by the end of each chapter, this can massively boost your learning experience and a perfect opportunity to test your knowledge.Always keep in mind that the more you implement and write code by yourself, the better skilled and confident you will become.This is a highly recommended read.Don’t miss the chance to master React from one of the best React instructors. Read more

Ralph B. Jan 24, 2025

Great teacher. Read more

Salman Farsi Jan 19, 2025

"React Key Concepts" by Maximilian Schwarzmüller is a comprehensive and thoughtfully organized guide to mastering React. This second edition encapsulates the essence of React's core features, offering developers a seamless blend of practical knowledge and theoretical understanding. With clear examples, insightful activities, and engaging exercises, the book simplifies complex concepts like components, hooks, state management, and advanced features such as React Router and Next.js integration. Tailored for both intermediate developers and those seeking a solid refresher, it stands as a practical reference and a structured learning path. Read more

React Key Concepts: An in-depth guide to React's core features , Second Edition

What do you get with Print?

React Key Concepts

Summary and Key Takeaways

Introduction

What Are Components?

Why Components?

What Does React Do with All These Components?

JSX vs HTML vs Vanilla JavaScript

Moving Beyond Static Content

Outputting Dynamic Content

When Should You Split Components?

Summary and Key Takeaways

Apply What You Learned

Activity 2.1: Creating a React App to Present Yourself

Page 1 of 9

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React Key Concepts: An in-depth guide to React's core features , Second Edition

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