hydration/dehydrate

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dehydrate creates a frozen representation of a cache that can later be hydrated with Hydrate, useHydrate, or hydrate. This is useful for passing prefetched queries from server to client or persisting queries to localStorage or other persistent locations. It only includes currently successful queries by default.

JavaScript

1import { dehydrate } from "react-query/hydration";2 3const dehydratedState = dehydrate(queryClient, {4  shouldDehydrateQuery,5});

Options

client: QueryClient
- Required
- The queryClient that should be dehydrated
options: DehydrateOptions
- Optional
- dehydrateMutations: boolean
  - Optional
  - Whether or not to dehydrate mutations.
- dehydrateQueries: boolean
  - Optional
  - Whether or not to dehydrate queries.
- shouldDehydrateMutation: (mutation: Mutation) => boolean
  - Optional
  - This function is called for each mutation in the cache
  - Return true to include this mutation in dehydration, or false otherwise
  - The default version only includes paused mutations
- shouldDehydrateQuery: (query: Query) => boolean
  - Optional
  - This function is called for each query in the cache
  - Return true to include this query in dehydration, or false otherwise
  - The default version only includes successful queries, do shouldDehydrateQuery: () => true to include all queries

Returns

dehydratedState: DehydratedState
- This includes everything that is needed to hydrate the queryClient at a later point
- You should not rely on the exact format of this response, it is not part of the public API and can change at any time
- This result is not in serialized form, you need to do that yourself if desired