React Query V4 Expert-Expert Query Assistance

Example

useQuery hook to fetch user data from an API and cache it for performance optimization.

Scenario

In a dashboard application where user data needs to be fetched from a server and displayed, React Query V5 handles API calls, data caching, and state management efficiently, reducing the need for manual boilerplate code and improving UI responsiveness.

Example

useMutation hook to handle POST requests for submitting form data.

Scenario

In an e-commerce application, useMutation can be used to handle checkout processes, where form data needs to be sent to a server to create or update orders. React Query V5 Expert shows how to use the hook to manage mutations, including optimistic updates and error handling.

Example

Configuring queries to refetch on window focus or network reconnection.

Scenario

In mobile applications where network connectivity can change frequently, React Query V5 automatically refetches data when the app regains focus or when the network status changes, ensuring that the app data is always up-to-date without manual intervention.