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

Performing side-effect patterns after mutations

As you read this section title, you might have been wondering whether you’ve seen how to perform side effects after your mutations previously. The answer is yes, you already did. To perform side effects after a mutation, you can leverage any of these options:

  • onMutate
  • onSuccess
  • onError
  • onSettled

Now, what you haven’t seen is how you can leverage these side effects to do some amazing things that might improve your user experience, such as performing multiple side effects, refetching a query, or even updating your query data after a mutation.

In this section, we will review some ways we leverage the callback functions of our useMutation hook and more to perform the previously mentioned side effects.

How to perform an additional side effect

During development, a scenario may come up where it would be useful if you could perform two onSuccess callbacks. Now, you can definitely add as much...