Handling Mutations with useMutation

How should an app add a user to the server, when useQuery can only read? A read can run whenever React Query decides, and it can run many times without harm. A request that creates a user must run once, at the moment the user presses a button. These requests therefore need a separate tool.

A mutation is any request that changes data on the server, such as creating an order, updating a profile, or deleting a comment. The useMutation hook runs one of these requests when you ask, and it tracks whether the request is running, has succeeded, or has failed.