---

What could you benefit from it

• Manage queryKey in a type-safe way
• Make queryClient's operations clearly associated with custom ReactQuery hooks
• You can extract the TypeScript type of any custom ReactQuery hooks
• Middleware

English | 简体中文

Table of Contents

• Installation
• Examples
• Usage
  • createQuery
  • createInfiniteQuery
  • createSuspenseQuery
  • createSuspenseInfiniteQuery
  • createMutation
  • router
  • Middleware
  • TypeScript
  • Type inference
  • Disabling Queries
• FAQ
• Migration
• Issues
  • 🐛 Bugs
  • 💡 Feature Requests
• LICENSE

Installation

This module is distributed via npm which is bundled with node and should be installed as one of your project's dependencies:

$ npm i react-query-kit
# or
$ yarn add react-query-kit

If you still on React Query Kit v2? Check out the v2 docs here: https://github.com/liaoliao666/react-query-kit/tree/v2#readme.

Examples

• Basic
• Optimistic Updates
• Next.js
• Load-More & Infinite Scroll

createQuery

Usage

import { QueryClient, dehydrate } from '@tanstack/react-query'
import { createQuery } from 'react-query-kit'

type Data = { title: string; content: string }
type Variables = { id: number }

const usePost = createQuery({
  queryKey: ['posts'],
  fetcher: (variables: Variables): Promise<data> =&gt; {
    return fetch(`/posts/${variables.id}`).then(res =&gt; res.json())
  },
  // u can also pass middleware to cutomize this hook's behavior
  use: [myMiddleware]
})


const variables = { id: 1 }

// example
export default function Page() {
  // queryKey will be `['posts', { id: 1 }]` if u passed variables
  const { data } = usePost({ variables })

  return (
    <div>
      <div>{data?.title}</div>
      <div>{data?.content}</div>
    </div>
  )
}

console.log(usePost.getKey()) //  ['posts']
console.log(usePost.getKey(variables)) //  ['posts', { id: 1 }]

// nextjs example
export async function getStaticProps() {
  const queryClient = new QueryClient()

  await queryClient.prefetchQuery(usePost.getFetchOptions(variables))

  return {
    props: {
      dehydratedState: dehydrate(queryClient),
    },
  }
}

// usage outside of react component
const data = await queryClient.fetchQuery(usePost.getFetchOptions(variables))

// useQueries example
const queries = useQueries({
  queries: [
   usePost.getOptions(variables),
   useUser.getOptions(),
  ],
})

// getQueryData
queryClient.getQueryData(usePost.getKey(variables)) // Data

// setQueryData
queryClient.setQueryData(usePost.getKey(variables), {...})

Additional API Reference

Options

• fetcher: (variables: TVariables, context: QueryFunctionContext) => TFnData | Promise
  • Required
  • The function that the query will use to request data. And The second param is the QueryFunctionContext of queryFn.
• variables?: TVariables
  • Optional
  • variables will be the frist param of fetcher and the last element of the queryKey array
• use: Middleware[]
  • Optional
  • array of middleware functions (details)

Expose Methods

• fetcher: (variables: TVariables, context: QueryFunctionContext) => TFnData | Promise
• getKey: (variables: TVariables) => QueryKey
• getOptions: (variables: TVariables) => UseQueryOptions
• getFetchOptions: (variables: TVariables) => ({ queryKey, queryFn, queryKeyHashFn })

createInfiniteQuery

Usage

import { QueryClient, dehydrate } from '@tanstack/react-query'
import { createInfiniteQuery } from 'react-query-kit'

type Data = { projects: { id: string; name: string }[]; nextCursor: number }
type Variables = { active: boolean }

const useProjects = createInfiniteQuery({
  queryKey: ['projects'],
  fetcher: (variables: Variables, { pageParam }): Promise<data> =&gt; {
    return fetch(
      `/projects?cursor=${pageParam}?active=${variables.active}`
    ).then(res =&gt; res.json())
  },
  getNextPageParam: (lastPage, pages) =&gt; lastPage.nextCursor,
  initialPageParam: 0,
})

const variables = { active: true }

// example
export default function Page() {
  // queryKey equals to ['projects', { active: true }]
  const { data, fetchNextPage, hasNextPage, isFetching, isFetchingNextPage } =
    useProjects({ variables })

  return (
    <div>
      {data.pages.map((group, i) =&gt; (
        
          {group.projects.map(project =&gt; (
            <p>{project.name}</p>
          ))}
        
      ))}
      <div>
        <button> fetchNextPage()}
          disabled={!hasNextPage || isFetchingNextPage}
        &gt;
          {isFetchingNextPage
            ? 'Loading more...'
            : hasNextPage
            ? 'Load More'
            : 'Nothing more to load'}
        </button>
      </div>
      <div>{isFetching &amp;&amp; !isFetchingNextPage ? 'Fetching...' : null}</div>
    </div>
  )
}

// nextjs example
export async function getStaticProps() {
  const queryClient = new QueryClient()

  await queryClient.prefetchInfiniteQuery(
    useProjects.getFetchOptions(variables)
  )

  return {
    props: {
      dehydratedState: dehydrate(queryClient),
    },
  }
}

// usage outside of react component
const data = await queryClient.fetchInfiniteQuery(
  useProjects.getFetchOptions(variables)
)

Additional API Reference

Options

• fetcher: (variables: TVariables, context: QueryFunctionContext) => TFnData | Promise
  • Required
  • The function that the query will use to request data. And The second param is the QueryFunctionContext of queryFn.
• variables?: TVariables
  • Optional
  • variables will be the frist param of fetcher and the last element of the queryKey array
• use: Middleware[]
  • Optional
  • array of middleware functions (details)

Expose Methods

• fetcher: (variables: TVariables, context: QueryFunctionContext) => TFnData | Promise
• getKey: (variables: TVariables) => QueryKey
• getOptions: (variables: TVariables) => UseInfiniteQueryOptions
• getFetchOptions: (variables: TVariables) => ({ queryKey, queryFn, queryKeyHashFn, getNextPageParam, getPreviousPageParam, initialPageParam })

createSuspenseQuery

This has the same effect as setting the suspense option to true in the query config, but it works better in TypeScript, because data is guaranteed to be defined (as errors and loading states are handled by Suspense- and ErrorBoundaries).

import { createSuspenseQuery } from 'react-query-kit'

createSuspenseQuery({
  ...options,
})

// equals to
createQuery({
  ...options,
  enabled: true,
  suspense: true,
  throwOnError: true,
})

createSuspenseInfiniteQuery

import { createSuspenseInfiniteQuery } from 'react-query-kit'

createSuspenseInfiniteQuery({
  ...options,
})

// equals to
createInfiniteQuery({
  ...options,
  enabled: true,
  suspense: true,
  throwOnError: true,
})

createMutation

Usage

import { createMutation } from 'react-query-kit'

const useAddTodo = createMutation({
  mutationFn: async (variables: { title: string; content: string }) =>
    fetch('/post', {
      method: 'POST',
      body: JSON.stringify(variables),
    }).then(res => res.json()),
  onSuccess(data, variables, context) {
    // do somethings
  },
})

function App() {
  const mutation = useAddTodo({
    onSettled: (data, error, variables, context) => {
      // Error or success... doesn't matter!
    },
  })

  return (
    <div>
      {mutation.isPending ? (
        'Adding todo...'
      ) : (
        &lt;&gt;
          {mutation.isError ? (
            <div>An error occurred: {mutation.error.message}</div>
          ) : null}

          {mutation.isSuccess ? <div>Todo added!</div> : null}

          <button> {
              mutation.mutate({ title: 'Do Laundry', content: 'content...' })
            }}
          &gt;
            create Todo
          </button>
        
      )}
    </div>
  )
}

// usage outside of react component
useAddTodo.mutationFn({ title: 'Do Laundry', content: 'content...' })

Additional API Reference

Options

• use: Middleware[]
  • Optional
  • array of middleware functions (details)

Expose Methods

• getKey: () => MutationKey
• getOptions: () => UseMutationOptions
• mutationFn: MutationFunction

router

router which allow you to create a shape of your entire API

Usage

import { router } from 'react-query-kit'

const post = router(`post`, {
  byId: router.query({
    fetcher: (variables: { id: number }) =>
      fetch(`/posts/${variables.id}`).then(res => res.json()),
    use: [myMiddleware],
  }),

  list: router.infiniteQuery({
    fetcher: (_variables, { pageParam }) =>
      fetch(`/posts/?cursor=${pageParam}`).then(res => res.json()),
    getNextPageParam: lastPage => lastPage.nextCursor,
    initialPageParam: 0,
  }),

  add: router.mutation({
    mutationFn: async (variables: { title: string; content: string }) =>
      fetch('/posts', {
        method: 'POST',
        body: JSON.stringify(variables),
      }).then(res => res.json()),
  }),

  // nest router
  command: {
    report: router.mutation({ mutationFn }),

    promote: router.mutation({ mutationFn }),
  },
})

// get root key
post.getKey() // ['post']

// hooks
post.byId.useQuery({ variables: { id: 1 } })
post.byId.useSuspenseQuery({ variables: { id: 1 } })
post.list.useInfiniteQuery()
post.list.useSuspenseInfiniteQuery()
post.add.useMutation()
post.command.report.useMutation()

// expose methods
post.byId.getKey({ id: 1 }) // ['post', 'byId', { id: 1 }]
post.byId.getFetchOptions({ id: 1 })
post.byId.getOptions({ id: 1 })
post.byId.fetcher({ id: 1 })
post.add.getKey() // ['post', 'add']
post.add.getOptions()
post.add.mutationFn({ title: 'title', content: 'content' })

// infer types
type Data = inferData
type FnData = inferFnData
type Variables = inferVariables
type Error = inferError

Merging Routers

import { router } from 'react-query-kit'

const user = router(`user`, {})
const post = router(`post`, {})

const k = {
  user,
  post,
}

API Reference

type Router = (key: string | unknown[], config: TConfig) => TRouter

Expose Methods

• query Similar to createQuery but without option queryKey
• infiniteQuery Similar to createInfiniteQuery but without option queryKey
• mutation Similar to createMutation but without option mutationKey

Middleware

This feature is inspired by the Middleware feature from SWR. The middleware feature is a new addition in ReactQueryKit 1.5.0 that enables you to execute logic before and after hooks.

Middleware receive the hook and can execute logic before and after running it. If there are multiple middleware, each middleware wraps the next middleware. The last middleware in the list will receive the original hook.

Usage

import { QueryClient } from '@tanstack/react-query'
import { Middleware, MutationHook, QueryHook, getKey } from 'react-query-kit'

const logger: Middleware> = useQueryNext => {
  return options => {
    const log = useLogger()
    const fetcher = (variables, context) => {
      log(context.queryKey, variables)
      return options.fetcher(variables, context)
    }

    return useQueryNext({
      ...options,
      fetcher,
    })
  }
}

const useUser = createQuery({
  use: [logger],
})

// global middlewares
const queryMiddleware: Middleware = useQueryNext => {
  return options => {
    // u can also get queryKey via function getKey
    const fullKey = getKey(options.queryKey, options.variables)
    // ...
    return useQueryNext(options)
  }
}
const mutationMiddleware: Middleware = useMutationNext => {
  return options => {
    // ...
    return useMutationNext(options)
  }
}

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      use: [queryMiddleware],
    },
    mutations: {
      use: [mutationMiddleware],
    },
  },
})

Extend

Middleware will be merged from superior. For example:

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      use: [a],
    },
  },
})

const useSomething = createQuery({
  use: [b],
})

useSomething({ use: [c] })

is equivalent to:

createQuery({ use: [a, b, c] })

Multiple Middleware

Each middleware wraps the next middleware, and the last one just wraps the useQuery. For example:

createQuery({ use: [a, b, c] })

The order of middleware executions will be a → b → c, as shown below:

enter a
  enter b
    enter c
      useQuery()
    exit  c
  exit  b
exit  a

Multiple QueryClient

In ReactQuery v5, the QueryClient will be the second argument to useQuery and useMutation. If u have multiple QueryClient in global, u should receive QueryClient in middleware hook.

const useSomething = createQuery({
  use: [
    function myMiddleware(useQueryNext) {
      // u should receive queryClient as the second argument here
      return (options, queryClient) => {
        const client = useQueryClient(queryClient)
        // ...
        return useQueryNext(options, queryClient)
      }
    },
  ],
})

// if u need to pass an another QueryClient
useSomething({...}, anotherQueryClient)

TypeScript

By default, ReactQueryKit will also infer the types of data and variables from fetcher, so you can have the preferred types automatically.

type Data = { title: string; content: string }
type Variables = { id: number }

const usePost = createQuery({
  queryKey: ['posts'],
  fetcher: (variables: Variables): Promise<data> =&gt; {
    return fetch(`/posts/${variables}`).then(res =&gt; res.json())
  },
})

// `data` will be inferred as `Data | undefined`.
// `variables` will be inferred as `Variables`.
const { data } = usePost({ variables: { id: 1 } })

You can also explicitly specify the types for fetcher‘s variables and data.

type Data = { title: string; content: string }
type Variables = { id: number }

const usePost = createQuery({
  queryKey: ['posts'],
  fetcher: variables => {
    return fetch(`/posts/${variables}`).then(res => res.json())
  },
})

// `data` will be inferred as `Data | undefined`.
// `error` will be inferred as `Error | null`
// `variables` will be inferred as `Variables`.
const { data, error } = usePost({ variables: { id: 1 } })

Type inference

You can extract the TypeScript type of any custom hook with inferData or inferVariables

import { inferData, inferFnData, inferError, inferVariables, inferOptions } from 'react-query-kit'

const useProjects = createInfiniteQuery(...)

inferData // InfiniteData<data>
inferFnData // Data
inferVariables // Variables
inferError // Error
inferOptions // InfiniteQueryHookOptions&lt;...&gt;

Disabling Queries

To disable queries, you can pass skipToken as the option variables to your custom query. This will prevent the query from being executed.

import { skipToken } from '@tanstack/react-query'

const [name, setName] = useState()
const result = usePost({
  variables: id ? { id: id } : skipToken,
})

// and for useQueries example
const queries = useQueries({
  queries: [usePost.getOptions(id ? { id: id } : skipToken)],
})

FAQ

What is the difference between getFetchOptions and getOptions?

getFetchOptions would only return necessary options, while options like staleTime and retry would be omited

What is the difference between fetcher and queryFn?

ReactQueryKit would automatically converts fetcher to queryFn, as shown below:

const useTest = createQuery({
  queryKey: ['test'],
  fetcher: (variables, context) => {
    // ...
  },
})

// => useTest.getOptions(variables):
// {
//   queryKey: ['test', variables],
//   queryFn: (context) => fetcher(variables, context)
// }

Migration

Upgrading from ReactQueryKit 2 → ReactQueryKit 3

createQuery({
-  primaryKey: 'posts',
-  queryFn: ({ queryKey: [_primaryKey, variables] }) => {},
+  queryKey: ['posts'],
+  fetcher: variables => {},
})

What you benefit from ReactQueryKit 3

• Support hierarchical key
• Support infer the types of fetcher, you can enjoy the preferred types automatically.
• Support to create a shape of your entire API

Issues

Looking to contribute? Look for the Good First Issue label.

🐛 Bugs

Please file an issue for bugs, missing documentation, or unexpected behavior.

See Bugs

💡 Feature Requests

Please file an issue to suggest new features. Vote on feature requests by adding a 👍. This helps maintainers prioritize what to work on.

See Feature Requests

LICENSE

MIT