Book Image

State Management with React Query

By : Daniel Afonso
Book Image

State Management with React Query

By: Daniel Afonso

Overview of this book

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.
Table of Contents (14 chapters)
Part 1: Understanding State and Getting to Know React Query
Part 2: Managing Server State with React Query

Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “Natively, React gives us two ways to hold state in our applications – useState and useReducer.”

A block of code is set as follows:

const NotState = ({aList = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]}) => {
  const value = "a constant value";
  const filteredList = aList.filter((item) => item % 2 === 0);
  return => <div key={item}>{item}</div>);

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

const App = () => {
  return (
    <div className="App">
      <div>Counter: {count}</div>
        <button onClick={increment}>+1</button>
        <button onClick={decrement}>-1</button>
        <button onClick={reset}>Reset</button>

Any command-line input or output is written as follows:

npm i @tanstack/react-query

Bold: Indicates a new term, an important word, or words that you see on screen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “As a user, I want my query to be re-fetched when I click the Invalidate Query button.”

Tips or important notes

Appear like this.