State Management with React Query: Improve developer and user experience by mastering server state in React

Cover Page....2

Table of Contents....3

Preface....4

Part 1: Understanding State and Getting to Know React Query....13

Chapter 1: What Is State and How Do We Manage It?....14

Technical requirements....14

What is state in React?....15

Managing state in React....17

What do different state management libraries have in common?....24

Summary....25

Chapter 2: Server State versus Client State....26

Technical requirements....27

What is global state?....27

What is client state?....31

What is server state?....32

Understanding common challenges with server state....34

Summary....38

Chapter 3: React Query – Introducing, Installing, and Configuring It....39

Technical requirements....39

What is React Query?....40

Installing React Query....43

Configuring React Query....45

Adding React Query Devtools....51

Summary....58

Part 2: Managing Server State with React Query....59

Chapter 4: Fetching Data with React Query....60

Technical requirements....60

What is useQuery and how does it work?....61

Refetching data with useQuery....81

Fetching dependent queries with useQuery....85

Putting it all into practice....87

Summary....94

Chapter 5: More Data-Fetching Challenges....96

Technical requirements....96

Building parallel queries....97

Leveraging QueryClient....100

Creating paginated queries....111

Creating infinite queries....115

Debugging your queries with Devtools....119

Summary....124

Chapter 6: Performing Data Mutations with React Query....126

Technical requirements....127

What is useMutation and how does it work?....127

Performing side-effect patterns after mutations....148

Performing optimistic updates....153

Summary....158

Chapter 7: Server-Side Rendering with Next.js or Remix....159

Technical requirements....159

Why should I use React Query with server-side rendering frameworks?....160

Using the initialData pattern....161

Using the hydrate pattern....165

Summary....172

Chapter 8: Testing React Query Hooks and Components....174

Technical requirements....174

Configuring Mock Service Worker....175

Organizing code....178

Testing components that use React Query....183

Testing custom hooks that use React Query....210

Summary....219

Chapter 9: What Changes in React Query v5?....221

Technical requirements....222

What are the support changes?....222

Using only the object format....222

Removing the logger....224

Renaming loading to pending....224

Renaming cacheTime to gcTime....225

Renaming Hydrate to HydrationBoundary....226

Removing keepPreviousData and using placeholderData....228

Introducing a new way to perform optimistic updates....229

Introducing maxPages to infinite queries....234

Summary....235

Index....237

Why subscribe?....250

Other Books You May Enjoy....252

Packt is searching for authors like you....255

Share your thoughts....255

Download a free PDF copy of this book....256

Beat common challenges in data fetching and data mutations while learning one of the most popular libraries for managing server state in React

Purchase of the print or Kindle book includes a free PDF eBook

Key Features

• Learn how state is split into server and client state and the common challenges with each
• Understand how React Query addresses server state challenges by facilitating data fetching and mutations
• Apply the knowledge gained to improve developer experience and build applications with improved UX

Book Description

State management, a crucial aspect of the React ecosystem, has gained significant attention in recent times. While React offers various libraries and tools to handle state, each with different approaches and perspectives, one thing is clear: state management solutions for handling client state are not optimized for dealing with server state. React Query was created to address this issue of managing your server state, and this guide will equip you with the knowledge and skills needed to effectively use React Query for state management.

Starting with a brief history of state management in the React ecosystem, you'll find out what prompted the split from a global state to client and server state and thus understand the need for React Query. As you progress through the chapters, you'll see how React Query enables you to perform server state tasks such as fetching, caching, updating, and synchronizing your data with the server. But that's not all; once you've mastered React Query, you'll be able to apply this knowledge to handle server state with server-side rendering frameworks as well. You'll also work with patterns to test your code by leveraging the testing library and Mock Service Worker.

By the end of this book, you'll have gained a new perspective of state and be able to leverage React Query to overcome the obstacles associated with server state.

What you will learn

• Get to grips with state and how it's typically managed
• Install and configure React Query and its Devtools
• Manage server state data fetching with the useQuery hook
• Create, update, and delete data using the useMutation hook
• Employ React Query in combination with frameworks such as Next.js and Remix
• Explore MSW and the testing library to test React Query using components and hooks

Who this book is for

The book is for React developers who want to improve their state management skills and overcome the hurdles brought about by server state while improving their developer and user experience. Basic knowledge of web development and React will assist with understanding key concepts covered in this book. JavaScript developers will also find it useful.