React Key Concepts

By : Maximilian Schwarzmüller

4.8 (4)

Buy this Book

React Key Concepts

4.8 (4)

By: Maximilian Schwarzmüller

Buy this Book

Overview of this book

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 eight 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.

Free Chapter

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

React – What and Why

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Introduction

What Is React?

The Problem with "Vanilla JavaScript"

React and Declarative Code

Introducing Single Page Applications

Summary and Key Takeaways

Understanding React Components and JSX

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Introduction

What Are Components?

What Does React Do with All These Components?

JSX vs HTML vs Vanilla JavaScript

Moving Beyond Static Content

When Should You Split Components?

Summary and Key Takeaways

Apply What You Learned

Components and Props

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Introduction

Not There Yet

Using Props in Components

Components, Props, and Reusability

How to Deal with Multiple Props

Summary and Key Takeaways

Apply What You Learned

Working with Events and State

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Introduction

What's the Problem?

Updating State Correctly

A Look under the Hood of React

Working with Multiple State Values

Deriving Values from State

Summary and Key Takeaways

Apply What You Learned

Rendering Lists and Conditional Content

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Introduction

What Are Conditional Content and List Data?

Rendering Content Conditionally

Outputting List Data

A Problem with List Items

Summary and Key Takeaways

Apply What You Learned

Styling React Apps

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Introduction

How Does Styling Work in React Apps?

Scoped Styles with CSS Modules

Summary and Key Takeaways

Apply What You Learned

Portals and Refs

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Introduction

A World without Refs

Refs versus State

Using Refs for More than DOM Access

React and Where Things End up in the DOM

Summary and Key Takeaways

Apply What You Have Learned

Handling Side Effects

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Introduction

What's the Problem?

Understanding Side Effects

Dealing with Side Effects with the useEffect() Hook

Effects and Their Dependencies

Summary and Key Takeaways

Apply What You Learned

Behind the Scenes of React and Optimization Opportunities

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Introduction

Revisiting Component Evaluations and Updates

The Virtual DOM vs the Real DOM

Avoiding Unnecessary Code Download

Strict Mode

Debugging Code and the React Developer Tools

Summary and Key Takeaways

Apply What You Learned

Working with Complex State

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Introduction

A Problem with Cross-Component State

Using Context to Handle Multi-Component State

Limitations of useState( )

Managing State with useReducer( )

Summary and Key Takeaways

Apply What You Learned

Building Custom React Hooks

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Introduction

Why Would You Build Custom Hooks?

Custom Hooks: A Flexible Feature

A More Complex Example

Summary and Key Takeaways

Apply What You Learned

Multipage Apps with React Router

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Introduction

One Page Is Not Enough

Getting Started with React Router and Defining Routes

From Static to Dynamic Routes

Redirecting

Summary and Key Takeaways

Apply What You Learned

Managing Data with React Router

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Introduction

Data Fetching and Routing Are Tightly Coupled

Loading Data with React Router

Getting Access to Loaded Data

Layouts Revisited

Handling Errors

Onward to Data Submission

Summary and Key Takeaways

Apply What You Learned

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React Key Concepts

By : Maximilian Schwarzmüller

React Key Concepts

By: Maximilian Schwarzmüller

Overview of this book

Apply What You Learned

Activity 3.1: Creating an App to Output Your Goals for This Book

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