useIsMutating

useIsMutating is an optional hook that returns the number of mutations that your application is fetching (useful for app-wide loading indicators).

import { useIsMutating } from 'react-query'
// How many mutations are fetching?
const isMutating = useIsMutating()
// How many mutations matching the posts prefix are fetching?
const isMutatingPosts = useIsMutating(['posts'])

Options

• mutationKey?: string | unknown[]
• filters?: MutationFilters: Mutation Filters

Returns

• isMutating: number
  • Will be the number of the mutations that your application is currently fetching.