React Query: derived boolean flags

In a nutshell

useQuery gives you a number of derived boolean flags:

• isFetching: true when the query is executing, whether it’s the initial fetch or subsequent background fetches.
• isPending: true when there is no cached data and no query attempt has finished yet.
• isLoading: true when the first request for a query is in-flight. Same as isFetching && isPending.
• isRefetching: true when a background refetch is in-flight. It doesn’t equal true when the initial fetch is in-flight.

Sources

• useQuery – Official docs