Mutation example

Demonstrating a post request to add a user using useMutation, and updating the user list by displaying the latest data using queryClient.setQueryData in the onSuccess callback.

  1. useMutation Hook: Utilize useMutation for performing POST requests to add a user.
  2. Mutation Function: Define a function to post user data to the server.
  3. onSuccess Callback: Use the onSuccess callback to update the cache with the latest user data.
  4. queryClient.setQueryData: Leverage queryClient.setQueryData to directly update the user list in the cache without refetching.
  5. Optimistic Updates: Ensure the user list reflects the newly added user immediately for a responsive user experience.

When to use

  1. Data Modification: Ideal for scenarios involving data creation, updates, or deletion.
  2. Real-Time Updates: Use to ensure the UI reflects the latest data changes immediately without waiting for a full refetch.
  3. Enhanced User Experience: Applicable for providing instant feedback to users after performing actions such as adding or updating items.

Full code for this example: Click here

User Form

User List