What could you benefit from it

• Make queryKey strongly related with queryFn
• Manage queryKey in a type-safe way
• Generate a custom ReactQuery hook quickly
• Make queryClient's operations clearly associated with custom ReactQuery hooks
• Set defaultOptions for custom ReactQuery hooks easier and clearer

English | 简体中文

Table of Contents

• Installation
• Examples
• Usage
  • createQuery
  • createInfiniteQuery
  • createMutation
  • Type inference
• 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

Examples

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

createQuery

Usage

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

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

const usePost = createQuery<Response, Variables, Error>({
  primaryKey: '/posts',
  queryFn: ({ queryKey: [primaryKey, variables] }) => {
    // primaryKey equals to '/posts'
    return fetch(`${primaryKey}/${variables.id}`).then(res => res.json())
  },
  // if u only wanna fetch once
  enabled: (data) => !data,
  suspense: true
})

// or using the alternative syntax to create
// const usePost = createQuery<Response, Variables, Error>(
//   '/posts',
//   ({ queryKey: [primaryKey, variables] }) => {
//     // primaryKey equals to '/posts'
//     return fetch(`${primaryKey}/${variables.id}`).then(res => res.json())
//   },
//   {
//     // if u only wanna fetch once
//     enabled: (data) => !data,
//     suspense: true
//   }
// )


const variables = { id: 1 }

// example
export default function Page() {
  // queryKey equals to ['/posts', { id: 1 }]
  const { data } = usePost({ variables, suspense: true })

  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.getKey(variables), usePost.queryFn)

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

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

// useQueries example
const queries = useQueries({
  queries: [
    { queryKey: usePost.getKey(variables), queryFn: usePost.queryFn },
    { queryKey: useProjects.getKey(), queryFn: useProjects.queryFn },
  ],
})

// setQueryData
queryClient.setQueryData<inferData<typeof usePost>>(usePost.getKey(variables), {...})

Additional API Reference

Options

• primaryKey: string
  • Required
  • primaryKey will be the first element of the array of queryKey
• enabled: boolean | ((data: TData, variables: TVariables) => boolean)
  • Optional
  • Set this to false to disable this query from automatically running.
  • If set to a function, the function will be executed with the latest data to compute the boolean

Expose Methods

• getPrimaryKey: () => primaryKey
• getKey: (variables: TVariables) => [primaryKey, variables]
• queryFn: QueryFunction<TFnData, [primaryKey, TVariables]>

Returns

• queryKey: unknown[]
  • The query key of this custom query.
• setData: (updater: Updater<TData>, options?: SetDataOptions) => TData | undefined
  • it's args similar with queryClient.setQueryData but without queryKey

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<Data, Variables, Error>({
  primaryKey: 'projects',
  queryFn: ({ queryKey: [_primaryKey, variables], pageParam = 1 }) => {
    return fetch(`/projects?cursor=${pageParam}?active=${variables.active}`).then(res => res.json())
  },
  getNextPageParam: (lastPage, pages) => lastPage.nextCursor,
})

const variables = { active: true }

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

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

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

  await queryClient.prefetchInfiniteQuery(
    useProjects.getKey(variables),
    useProjects.queryFn
  )

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

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

Additional API Reference

Options

• primaryKey: string
  • Required
  • primaryKey will be the first element of the arrary of queryKey
• enabled: boolean | ((data: TData, variables: TVariables) => boolean)
  • Optional
  • Set this to false to disable this query from automatically running.
  • If set to a function, the function will be executed with the latest data to compute the boolean

Expose Methods

• getPrimaryKey: () => primaryKey
• getKey: (variables: TVariables) => [primaryKey, variables]
• queryFn: QueryFunction<TFnData, [primaryKey, TVariables]>

Returns

• queryKey: unknown[]
  • The query key of this custom query.
• setData: (updater: Updater<InfiniteData<TFnData>>, options?: SetDataOptions) => TData | undefined
  • it's args similar with queryClient.setQueryData but without queryKey

createMutation

Usage

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

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

// or using the alternative syntax to create
// const useAddTodo = createMutation<TData, { title: string; content: string }>(
//   async (variables) =>
//     fetch('/post', {
//       method: 'POST',
//       headers: {
//         Accept: 'application/json',
//         'Content-Type': 'application/json',
//       },
//       body: JSON.stringify(variables),
//     }).then(res => res.json()),
// )

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

  return (
    <div>
      {mutation.isLoading ? (
        'Adding todo...'
      ) : (
        <>
          {mutation.isError ? (
            <div>An error occurred: {mutation.error.message}</div>
          ) : null}

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

          <button
            onClick={() => {
              mutation.mutate({  title: 'Do Laundry', content: "content..." })
            }}
          >
            Create Todo
          </button>
        </>
      )}
    </div>
  )
}

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

Additional API Reference

Returns

• getKey: () => MutationKey
• mutationFn: MutationFunction<TData, TVariables>

Type inference

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

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

type Variables = inferVariables<typeof usePost>
type Data = inferData<typeof usePost>

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