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

Leveraging QueryClient

As you are aware, QueryClient allows you to interact with your cache.

In the previous chapter, we saw how QueryClient could be leveraged to trigger refetching a query. What we haven’t seen yet is how QueryClient can be used for much more things.

To use QueryClient in your components, you can leverage the useQueryClient hook to access it. Then, all you have to do is call the method you need.

In this section, we’ll see how you can use QueryClient to solve more server state challenges such as the following:

  • Query invalidation
  • Prefetching
  • Query cancelation

Before we start query invalidation, one thing to be aware of is that some of these methods, namely the ones we are going to see, can receive certain query filters to help you match with the right queries.

In the previous chapter, we saw the following example for query refetching:

queryClient.refetchQueries({ queryKey: ["api"] })

The preceding snippet...