Using React Query for Data Fetching
Discover how to use React Query to manage server state in React Native applications. Learn to implement simple and custom hooks to fetch user login status and image data conditionally, ensuring data is synchronized and displayed correctly within your app.
We'll cover the following...
As we know, we need to fetch a few different pieces of data for our app. We will fetch the following:
List of avatars
List of images for the “Feed” surface
List of images for the “Favorited Images” surface
List of conversations
We are free to add the React Query fetching wherever we like. For simple queries, we can simply use the useQuery hook provided by the library in our components. We can also write our own custom hooks, holding more logic or conditions.
Checking the login status
Let’s start by looking at the simplest possible example: querying the server to check whether the user is logged in.
In order to use a React Query hook in the top-level component where we set up our navigation to display either the login screen or not, we will need to reorganize our code a little bit. We cannot have QueryClientProvider in the return statement of the same component trying to use a useQuery hook. Let’s change the name of the main component from App to AppWrapped and let’s add this new ...