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---
id: devtools
title: Devtools
---
Wave your hands in the air and shout hooray because Vue Query comes with dedicated devtools! 🥳
When you begin your Vue Query journey, you'll want these devtools by your side. They help visualize all of the inner workings of Vue Query and will likely save you hours of debugging if you find yourself in a pinch!
> For Chrome, Firefox, and Edge users: Third-party browser extensions are available for debugging TanStack Query directly in browser DevTools. These provide the same functionality as the framework-specific devtools packages:
>
> - <img alt="Chrome logo" src="https://www.google.com/chrome/static/images/chrome-logo.svg" width="16" height="16" class="inline mr-1 not-prose" /> <a href="https://chromewebstore.google.com/detail/tanstack-query-devtools/annajfchloimdhceglpgglpeepfghfai">Devtools for Chrome</a>
> - <img alt="Firefox logo" src="https://upload.wikimedia.org/wikipedia/commons/a/a0/Firefox_logo%2C_2019.svg" width="16" height="16" class="inline mr-1 not-prose" /> <a href="https://addons.mozilla.org/en-US/firefox/addon/tanstack-query-devtools/">Devtools for Firefox</a>
> - <img alt="Edge logo" src="https://upload.wikimedia.org/wikipedia/commons/9/98/Microsoft_Edge_logo_%282019%29.svg" width="16" height="16" class="inline mr-1 not-prose" /> <a href="https://microsoftedge.microsoft.com/addons/detail/tanstack-query-devtools/edmdpkgkacmjopodhfolmphdenmddobj">Devtools for Edge</a>
## Component based Devtools (Vue 3)
You can directly integrate the devtools component into your page using a dedicated package.
Component-based devtools use a framework-agnostic implementation and are always up-to-date.
The devtools component is a separate package that you need to install:
```bash
npm i @tanstack/vue-query-devtools
```
or
```bash
pnpm add @tanstack/vue-query-devtools
```
or
```bash
yarn add @tanstack/vue-query-devtools
```
or
```bash
bun add @tanstack/vue-query-devtools
```
By default, Vue Query Devtools are only included in bundles when `process.env.NODE_ENV === 'development'`, so you don't need to worry about excluding them during a production build.
## Floating Mode
Devtools will be mounted as a fixed, floating element in your app and provide a toggle in the corner of the screen to show and hide the devtools. This toggle state will be stored and remembered in localStorage across reloads.
Place the following code as high in your Vue app as you can. The closer it is to the root of the page, the better it will work!
```vue
<script setup>
import { VueQueryDevtools } from '@tanstack/vue-query-devtools'
</script>
<template>
<h1>The app!</h1>
<VueQueryDevtools />
</template>
```
### Options
- `initialIsOpen: boolean`
- Set this `true` if you want the dev tools to default to being open.
- `buttonPosition?: "top-left" | "top-right" | "bottom-left" | "bottom-right" | "relative"`
- Defaults to `bottom-right`.
- The position of the TanStack logo to open and close the devtools panel.
- `position?: "top" | "bottom" | "left" | "right"`
- Defaults to `bottom`.
- The position of the Vue Query devtools panel.
- `client?: QueryClient`
- Use this to use a custom QueryClient. Otherwise, the one from the nearest context will be used.
- `errorTypes?: { name: string; initializer: (query: Query) => TError}[]`
- Use this to predefine some errors that can be triggered on your queries. The initializer will be called (with the specific query) when that error is toggled on from the UI. It must return an Error.
- `styleNonce?: string`
- Use this to pass a nonce to the style tag that is added to the document head. This is useful if you are using a Content Security Policy (CSP) nonce to allow inline styles.
- `shadowDOMTarget?: ShadowRoot`
- Default behavior will apply the devtool's styles to the head tag within the DOM.
- Use this to pass a shadow DOM target to the devtools so that the styles will be applied within the shadow DOM instead of within the head tag in the light DOM.
- `theme?: "light" | "dark" | "system"`
- Defaults to `system`.
- Set this to change the theme of the devtools panel.
## Embedded Mode
Embedded mode will show the development tools as a fixed element in your application, so you can use our panel in your own development tools.
Place the following code as high in your Vue app as you can. The closer it is to the root of the page, the better it will work!
```vue
<script setup>
import { ref } from 'vue'
import { VueQueryDevtoolsPanel } from '@tanstack/vue-query-devtools'
const isOpen = ref(false)
</script>
<template>
<h1>The app!</h1>
<button @click="isOpen = !isOpen">
{{ isOpen ? 'Close' : 'Open' }} the devtools panel
</button>
<VueQueryDevtoolsPanel v-if="isOpen" :onClose="() => (isOpen = false)" />
</template>
```
### Options
- `style?: Partial<CSSStyleDeclaration>`
- Custom styles for the devtools panel
- Default: `{ height: '500px' }`
- Example: `{ height: '100%' }`
- Example: `{ height: '100%', width: '100%' }`
- `onClose?: () => void`
- Callback function that is called when the devtools panel is closed
- `client?: QueryClient`,
- Use this to use a custom QueryClient. Otherwise, the one from the nearest context will be used.
- `errorTypes?: { name: string; initializer: (query: Query) => TError}[]`
- Use this to predefine some errors that can be triggered on your queries. Initializer will be called (with the specific query) when that error is toggled on from the UI. It must return an Error.
- `styleNonce?: string`
- Use this to pass a nonce to the style tag that is added to the document head. This is useful if you are using a Content Security Policy (CSP) nonce to allow inline styles.
- `shadowDOMTarget?: ShadowRoot`
- Default behavior will apply the devtool's styles to the head tag within the DOM.
- Use this to pass a shadow DOM target to the devtools so that the styles will be applied within the shadow DOM instead of within the head tag in the light DOM.
- `theme?: "light" | "dark" | "system"`
- Defaults to `system`.
- Set this to change the theme of the devtools panel.
## Traditional Devtools
Vue Query will seamlessly integrate with the [Official Vue devtools](https://github.com/vuejs/devtools-next), adding custom inspector and timeline events.
Devtool code will be treeshaken from production bundles by default.
To make it work, you only need to enable it in the plugin options:
```ts
app.use(VueQueryPlugin, {
enableDevtoolsV6Plugin: true,
})
```
Both v6 and v7 versions of devtools are supported.

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---
id: graphql
title: GraphQL
ref: docs/framework/react/graphql.md
replace: { 'React': 'Vue', 'react-query': 'vue-query' }
---
[//]: # 'Codegen'
[//]: # 'Codegen'

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---
id: background-fetching-indicators
title: Background Fetching Indicators
ref: docs/framework/react/guides/background-fetching-indicators.md
---
[//]: # 'Example'
```vue
<script setup>
import { useQuery } from '@tanstack/vue-query'
const { isPending, isFetching, isError, data, error } = useQuery({
queryKey: ['todos'],
queryFn: getTodos,
})
</script>
<template>
<div v-if="isFetching">Refreshing...</div>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<!-- We can assume by this point that `isSuccess === true` -->
<ul v-else-if="data">
<li v-for="todo in data" :key="todo.id">{{ todo.title }}</li>
</ul>
</template>
```
[//]: # 'Example'
[//]: # 'Example2'
```vue
<script setup>
import { useIsFetching } from '@tanstack/vue-query'
const isFetching = useIsFetching()
</script>
<template>
<div v-if="isFetching">Queries are fetching in the background...</div>
</template>
```
[//]: # 'Example2'

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---
id: caching
title: Caching Examples
ref: docs/framework/react/guides/caching.md
---

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---
id: custom-client
title: Custom Client
---
### Custom client
Vue Query allows providing custom `QueryClient` for Vue context.
It might be handy when you need to create `QueryClient` beforehand to integrate it with other libraries that do not have access to the Vue context.
For this reason, `VueQueryPlugin` accepts either `QueryClientConfig` or `QueryClient` as a plugin options.
If You provide `QueryClientConfig`, `QueryClient` instance will be created internally and provided to Vue context.
```tsx
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClientConfig: {
defaultOptions: { queries: { staleTime: 3600 } },
},
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
```
```tsx
const myClient = new QueryClient(queryClientConfig)
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClient: myClient,
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
```
### Custom context key
You can also customize the key under which `QueryClient` will be accessible in Vue context. This can be useful is you want to avoid name clashing between multiple apps on the same page with Vue2.
It works both with default, and custom `QueryClient`
```tsx
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClientKey: 'Foo',
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
```
```tsx
const myClient = new QueryClient(queryClientConfig)
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClient: myClient,
queryClientKey: 'Foo',
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
```
To use the custom client key, You have to provide it as a query options
```js
useQuery({
queryKey: ['query1'],
queryFn: fetcher,
queryClientKey: 'foo',
})
```
Internally custom key will be combined with default query key as a suffix. But user do not have to worry about it.
```tsx
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClientKey: 'Foo',
}
app.use(VueQueryPlugin, vueQueryPluginOptions) // -> VUE_QUERY_CLIENT:Foo
```

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---
id: default-query-function
title: Default Query Function
ref: docs/framework/react/guides/default-query-function.md
---
[//]: # 'Example'
```tsx
// Define a default query function that will receive the query key
const defaultQueryFn = async ({ queryKey }) => {
const { data } = await axios.get(
`https://jsonplaceholder.typicode.com${queryKey[0]}`,
)
return data
}
// provide the default query function to your app with defaultOptions
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClientConfig: {
defaultOptions: { queries: { queryFn: defaultQueryFn } },
},
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
// All you have to do now is pass a key!
const { status, data, error, isFetching } = useQuery({
queryKey: [`/posts/${postId}`],
})
```
[//]: # 'Example'

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---
id: dependent-queries
title: Dependent Queries
ref: docs/framework/react/guides/dependent-queries.md
---
[//]: # 'Example'
```js
// Get the user
const { data: user } = useQuery({
queryKey: ['user', email],
queryFn: () => getUserByEmail(email.value),
})
const userId = computed(() => user.value?.id)
const enabled = computed(() => !!user.value?.id)
// Then get the user's projects
const { isIdle, data: projects } = useQuery({
queryKey: ['projects', userId],
queryFn: () => getProjectsByUser(userId.value),
enabled, // The query will not execute until `enabled == true`
})
```
[//]: # 'Example'
[//]: # 'Example2'
```tsx
// Get the users ids
const { data: userIds } = useQuery({
queryKey: ['users'],
queryFn: getUsersData,
select: (users) => users.map((user) => user.id),
})
const queries = computed(() => {
return userIds.value.length
? userIds.value.map((id) => {
return {
queryKey: ['messages', id],
queryFn: () => getMessagesByUsers(id),
}
})
: []
})
// Then get the users messages
const usersMessages = useQueries({
queries, // if userIds.value is undefined or has no items, an empty array will be returned
})
```
[//]: # 'Example2'

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---
id: disabling-queries
title: Disabling/Pausing Queries
ref: docs/framework/react/guides/disabling-queries.md
---
[//]: # 'Example'
```vue
<script setup>
import { useQuery } from '@tanstack/vue-query'
const { isLoading, isError, data, error, refetch, isFetching } = useQuery({
queryKey: ['todos'],
queryFn: fetchTodoList,
enabled: false,
})
</script>
<template>
<button @click="refetch()">Fetch Todos</button>
<span v-if="isLoading">Loading...</span>
<span v-else-if="isError">Error: {{ error?.message }}</span>
<div v-else-if="data">
<span v-if="isFetching">Fetching...</span>
<ul>
<li v-for="todo in data" :key="todo.id">{{ todo.title }}</li>
</ul>
</div>
<span v-else>Not ready...</span>
</template>
```
[//]: # 'Example'
[//]: # 'Example2'
```vue
<script setup>
import { useQuery } from '@tanstack/vue-query'
const filter = ref('')
const isEnabled = computed(() => !!filter.value)
const { data } = useQuery({
queryKey: ['todos', filter],
queryFn: () => fetchTodos(filter),
// ⬇️ disabled as long as the filter is empty
enabled: isEnabled,
})
</script>
<template>
<span v-if="data">Filter was set and data is here!</span>
</template>
```
[//]: # 'Example2'
[//]: # 'Example3'
```vue
<script setup>
import { useQuery, skipToken } from '@tanstack/vue-query'
const filter = ref('')
const queryFn = computed(() =>
!!filter.value ? () => fetchTodos(filter) : skipToken,
)
const { data } = useQuery({
queryKey: ['todos', filter],
// ⬇️ disabled as long as the filter is undefined or empty
queryFn: queryFn,
})
</script>
<template>
<span v-if="data">Filter was set and data is here!</span>
</template>
```
[//]: # 'Example3'

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---
id: does-this-replace-client-state
title: Does Vue Query replace Vuex, Pinia or other global state managers?
ref: docs/framework/react/guides/does-this-replace-client-state.md
replace: { 'Redux, MobX': 'Vuex, Pinia' }
---

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---
id: filters
title: Filters
ref: docs/framework/react/guides/filters.md
---

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---
id: important-defaults
title: Important Defaults
ref: docs/framework/react/guides/important-defaults.md
---
[//]: # 'Materials'
[//]: # 'Materials'

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---
id: infinite-queries
title: Infinite Queries
ref: docs/framework/react/guides/infinite-queries.md
---
[//]: # 'Example'
```vue
<script setup>
import { useInfiniteQuery } from '@tanstack/vue-query'
const fetchProjects = async ({ pageParam }) => {
const res = await fetch('/api/projects?cursor=' + pageParam)
return res.json()
}
const {
data,
error,
fetchNextPage,
hasNextPage,
isFetching,
isFetchingNextPage,
isPending,
isError,
} = useInfiniteQuery({
queryKey: ['projects'],
queryFn: fetchProjects,
initialPageParam: 0,
getNextPageParam: (lastPage, pages) => lastPage.nextCursor,
})
</script>
<template>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<div v-else-if="data">
<span v-if="isFetching && !isFetchingNextPage">Fetching...</span>
<ul v-for="(group, index) in data.pages" :key="index">
<li v-for="project in group.projects" :key="project.id">
{{ project.name }}
</li>
</ul>
<button
@click="() => fetchNextPage()"
:disabled="!hasNextPage || isFetchingNextPage"
>
<span v-if="isFetchingNextPage">Loading more...</span>
<span v-else-if="hasNextPage">Load More</span>
<span v-else>Nothing more to load</span>
</button>
</div>
</template>
```
[//]: # 'Example'

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---
id: initial-query-data
title: Initial Query Data
ref: docs/framework/react/guides/initial-query-data.md
---
[//]: # 'Materials'
[//]: # 'Materials'

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---
id: invalidations-from-mutations
title: Invalidations from Mutations
ref: docs/framework/react/guides/invalidations-from-mutations.md
---
[//]: # 'Example2'
```tsx
import { useMutation, useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
// When this mutation succeeds, invalidate any queries with the `todos` or `reminders` query key
const mutation = useMutation({
mutationFn: addTodo,
onSuccess: () => {
queryClient.invalidateQueries({ queryKey: ['todos'] })
queryClient.invalidateQueries({ queryKey: ['reminders'] })
},
})
```
[//]: # 'Example2'

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---
id: migrating-to-tanstack-query-5
title: Migrating to TanStack Query v5
ref: docs/framework/react/guides/migrating-to-v5.md
---
[//]: # 'FrameworkSpecificBreakingChanges'
## Vue Query Breaking Changes
### `useQueries` composable returns `ref` instead of `reactive`
To fix compatibility with Vue 2, `useQueries` composable now returns `queries` array wrapped in `ref`.
Previously `reactive` was returned which led to multiple problems:
- User could spread return value loosing reactivity.
- `readonly` wrapper used for return value was breaking Vue 2 reactivity detection mechanism. This was a silent issue in Vue 2.6, but appeared as error in Vue 2.7.
- Vue 2 does not support arrays as a root value of `reactive`.
With this change all of those issues are fixed.
Also this aligns `useQueries` with other composables which return all of the values as `refs`.
### Vue v3.3 is now required
To be able to provide new features following Vue releases, we now require Vue 3 to be at least in v3.3 version.
Requirements for Vue 2.x remain unchanged.
[//]: # 'FrameworkSpecificBreakingChanges'
[//]: # 'FrameworkSpecificNewFeatures'
### Ability to run `vue-query` composables in `injectionContext`
Previously `vue-query` composables could be run only within `setup` function of the component.
We had an escape hatch in place to allow those hooks to be run anywhere if user would provide `queryClient` as a composable option.
Now you can use `vue-query` composables in any function that supports `injectionContext`. Ex. router navigation guards.
When using this new feature, make sure that `vue-query` composable is running within `effectScope`. Otherwise it might lead to memory leaks.
We have added `dev-only` warnings to inform users about potential misusage.
[//]: # 'FrameworkSpecificNewFeatures'

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---
id: mutations
title: Mutations
ref: docs/framework/react/guides/mutations.md
---
[//]: # 'Example'
```vue
<script setup>
import { useMutation } from '@tanstack/vue-query'
const { isPending, isError, error, isSuccess, mutate } = useMutation({
mutationFn: (newTodo) => axios.post('/todos', newTodo),
})
function addTodo() {
mutate({ id: new Date(), title: 'Do Laundry' })
}
</script>
<template>
<span v-if="isPending">Adding todo...</span>
<span v-else-if="isError">An error occurred: {{ error.message }}</span>
<span v-else-if="isSuccess">Todo added!</span>
<button @click="addTodo">Create Todo</button>
</template>
```
[//]: # 'Example'
[//]: # 'Info1'
[//]: # 'Info1'
[//]: # 'Example2'
[//]: # 'Example2'
[//]: # 'Example3'
```vue
<script>
import { useMutation } from '@tanstack/vue-query'
const { error, mutate, reset } = useMutation({
mutationFn: (newTodo) => axios.post('/todos', newTodo),
})
function addTodo() {
mutate({ id: new Date(), title: 'Do Laundry' })
}
</script>
<template>
<span v-else-if="error">
<span>An error occurred: {{ error.message }}</span>
<button @click="reset">Reset error</button>
</span>
<button @click="addTodo">Create Todo</button>
</template>
```
[//]: # 'Example3'
[//]: # 'Example11'
```js
const client = new QueryClient({
defaultOptions: {
queries: {
gcTime: 1000 * 60 * 60 * 24, // 24 hours
},
},
})
// we need a default mutation function so that paused mutations can resume after a page reload
queryClient.setMutationDefaults({
mutationKey: ['todos'],
mutationFn: ({ id, data }) => {
return api.updateTodo(id, data)
},
})
const vueQueryOptions: VueQueryPluginOptions = {
queryClient: client,
clientPersister: (queryClient) => {
return persistQueryClient({
queryClient,
persister: createAsyncStoragePersister({ storage: localStorage }),
})
},
clientPersisterOnSuccess: (queryClient) => {
queryClient.resumePausedMutations()
},
}
createApp(App).use(VueQueryPlugin, vueQueryOptions).mount('#app')
```
[//]: # 'Example11'
[//]: # 'Materials'
[//]: # 'Materials'

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---
id: network-mode
title: Network Mode
ref: docs/framework/react/guides/network-mode.md
---

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---
id: optimistic-updates
title: Optimistic Updates
ref: docs/framework/react/guides/optimistic-updates.md
replace: { 'React': 'Vue' }
---

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---
id: paginated-queries
title: Paginated / Lagged Queries
ref: docs/framework/react/guides/paginated-queries.md
---
[//]: # 'Example2'
```vue
<script setup lang="ts">
import { ref, Ref } from 'vue'
import { useQuery, keepPreviousData } from '@tanstack/vue-query'
const fetcher = (page: Ref<number>) =>
fetch(
`https://jsonplaceholder.typicode.com/posts?_page=${page.value}&_limit=10`,
).then((response) => response.json())
const page = ref(1)
const { isPending, isError, data, error, isFetching, isPlaceholderData } =
useQuery({
queryKey: ['projects', page],
queryFn: () => fetcher(page),
placeholderData: keepPreviousData,
})
const prevPage = () => {
page.value = Math.max(page.value - 1, 1)
}
const nextPage = () => {
if (!isPlaceholderData.value) {
page.value = page.value + 1
}
}
</script>
<template>
<h1>Posts</h1>
<p>Current Page: {{ page }} | Previous data: {{ isPlaceholderData }}</p>
<button @click="prevPage">Prev Page</button>
<button @click="nextPage">Next Page</button>
<div v-if="isPending">Loading...</div>
<div v-else-if="isError">An error has occurred: {{ error }}</div>
<div v-else-if="data">
<ul>
<li v-for="item in data" :key="item.id">
{{ item.title }}
</li>
</ul>
</div>
</template>
```
[//]: # 'Example2'

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---
id: parallel-queries
title: Parallel Queries
ref: docs/framework/react/guides/parallel-queries.md
---
[//]: # 'Example'
```vue
<script setup lang="ts">
// The following queries will execute in parallel
const usersQuery = useQuery({ queryKey: ['users'], queryFn: fetchUsers })
const teamsQuery = useQuery({ queryKey: ['teams'], queryFn: fetchTeams })
const projectsQuery = useQuery({
queryKey: ['projects'],
queryFn: fetchProjects,
})
</script>
```
[//]: # 'Example'
[//]: # 'Info'
[//]: # 'Info'
[//]: # 'Example2'
```js
const users = computed(...)
const queries = computed(() => users.value.map(user => {
return {
queryKey: ['user', user.id],
queryFn: () => fetchUserById(user.id),
}
})
);
const userQueries = useQueries({queries: queries})
```
[//]: # 'Example2'

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---
id: placeholder-query-data
title: Placeholder Query Data
ref: docs/framework/react/guides/placeholder-query-data.md
---
[//]: # 'ExampleValue'
```tsx
const result = useQuery({
queryKey: ['todos'],
queryFn: () => fetch('/todos'),
placeholderData: placeholderTodos,
})
```
[//]: # 'ExampleValue'
[//]: # 'Memoization'
[//]: # 'Memoization'
[//]: # 'ExampleCache'
```tsx
const result = useQuery({
queryKey: ['blogPost', blogPostId],
queryFn: () => fetch(`/blogPosts/${blogPostId}`),
placeholderData: () => {
// Use the smaller/preview version of the blogPost from the 'blogPosts'
// query as the placeholder data for this blogPost query
return queryClient
.getQueryData(['blogPosts'])
?.find((d) => d.id === blogPostId)
},
})
```
[//]: # 'ExampleCache'
[//]: # 'Materials'
[//]: # 'Materials'

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@@ -0,0 +1,9 @@
---
id: polling
title: Polling
ref: docs/framework/react/guides/polling.md
replace: { '@tanstack/react-query': '@tanstack/vue-query' }
---
[//]: # 'ReactNative'
[//]: # 'ReactNative'

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@@ -0,0 +1,57 @@
---
id: prefetching
title: Prefetching
---
If you're lucky enough, you may know enough about what your users will do to be able to prefetch the data they need before it's needed. If this is the case, use `queryClient.query` or `queryClient.infiniteQuery` to warm the cache ahead of time:
[//]: # 'ExamplePrefetching'
```tsx
import { noop } from '@tanstack/vue-query'
const prefetchTodos = async () => {
// The results of this query will be cached like a normal query
await queryClient
.query({
queryKey: ['todos'],
queryFn: fetchTodos,
})
.catch(noop)
}
```
[//]: # 'ExamplePrefetching'
- If **fresh** data for this query is already in the cache, the data will not be fetched
- If a `staleTime` is passed e.g. `queryClient.query({ queryKey: ['todos'], queryFn: fn, staleTime: 5000 })` and the data is older than the specified `staleTime`, the query will be fetched
- As `useQuery` will retry fetches and handle errors, you can use `void` to ignore the promise from `query` and `.catch(noop)` to ignore errors.
- If you want to always return cached data when it exists, use `staleTime: 'static'`
- If no instances of `useQuery` appear for a prefetched query, it will be deleted and garbage collected after the time specified in `gcTime`.
## Prefetching Infinite Queries
Infinite Queries can be prefetched like regular Queries. Per default, only the first page of the Query will be prefetched and will be stored under the given QueryKey. If you want to prefetch more than one page, you can use the `pages` option, in which case you also have to provide a `getNextPageParam` function:
[//]: # 'ExampleInfiniteQuery'
```tsx
import { noop } from '@tanstack/vue-query'
const prefetchProjects = async () => {
// The results of this query will be cached like a normal query
await queryClient
.infiniteQuery({
queryKey: ['projects'],
queryFn: fetchProjects,
initialPageParam: 0,
getNextPageParam: (lastPage, pages) => lastPage.nextCursor,
pages: 3, // prefetch the first 3 pages
})
.catch(noop)
}
```
[//]: # 'ExampleInfiniteQuery'
The above code will try to prefetch 3 pages in order, and `getNextPageParam` will be executed for each page to determine the next page to prefetch. If `getNextPageParam` returns `undefined`, the prefetching will stop.

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@@ -0,0 +1,63 @@
---
id: queries
title: Queries
ref: docs/framework/react/guides/queries.md
---
[//]: # 'Example'
```ts
import { useQuery } from '@tanstack/vue-query'
const result = useQuery({ queryKey: ['todos'], queryFn: fetchTodoList })
```
[//]: # 'Example'
[//]: # 'Example3'
```vue
<script setup>
import { useQuery } from '@tanstack/vue-query'
const { isPending, isError, data, error } = useQuery({
queryKey: ['todos'],
queryFn: fetchTodoList,
})
</script>
<template>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<!-- We can assume by this point that `isSuccess === true` -->
<ul v-else-if="data">
<li v-for="todo in data" :key="todo.id">{{ todo.title }}</li>
</ul>
</template>
```
[//]: # 'Example3'
[//]: # 'Example4'
```vue
<script setup>
import { useQuery } from '@tanstack/vue-query'
const { status, data, error } = useQuery({
queryKey: ['todos'],
queryFn: fetchTodoList,
})
</script>
<template>
<span v-if="status === 'pending'">Loading...</span>
<span v-else-if="status === 'error'">Error: {{ error.message }}</span>
<!-- also status === 'success', but "else" logic works, too -->
<ul v-else-if="data">
<li v-for="todo in data" :key="todo.id">{{ todo.title }}</li>
</ul>
</template>
```
[//]: # 'Example4'
[//]: # 'Materials'
[//]: # 'Materials'

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@@ -0,0 +1,25 @@
---
id: query-cancellation
title: Query Cancellation
ref: docs/framework/react/guides/query-cancellation.md
---
[//]: # 'Example7'
```ts
const query = useQuery({
queryKey: ['todos'],
queryFn: async ({ signal }) => {
const resp = await fetch('/todos', { signal })
return resp.json()
},
})
const queryClient = useQueryClient()
function onButtonClick() {
queryClient.cancelQueries({ queryKey: ['todos'] })
}
```
[//]: # 'Example7'

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@@ -0,0 +1,22 @@
---
id: query-functions
title: Query Functions
ref: docs/framework/react/guides/query-functions.md
---
[//]: # 'Example4'
```js
const result = useQuery({
queryKey: ['todos', { status, page }],
queryFn: fetchTodoList,
})
// Access the key, status and page variables in your query function!
function fetchTodoList({ queryKey }) {
const [_key, { status, page }] = queryKey
return new Promise()
}
```
[//]: # 'Example4'

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@@ -0,0 +1,6 @@
---
id: query-invalidation
title: Query Invalidation
ref: docs/framework/react/guides/query-invalidation.md
replace: { 'react-query': 'vue-query' }
---

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@@ -0,0 +1,21 @@
---
id: query-keys
title: Query Keys
ref: docs/framework/react/guides/query-keys.md
---
[//]: # 'Example5'
```ts
import type { Ref } from 'vue'
function useTodos(todoId: Ref<string>) {
const queryKey = ['todos', todoId]
return useQuery({
queryKey,
queryFn: () => fetchTodoById(todoId.value),
})
}
```
[//]: # 'Example5'

View File

@@ -0,0 +1,6 @@
---
id: query-options
title: Query Options
ref: docs/framework/react/guides/query-options.md
replace: { '@tanstack/react-query': '@tanstack/vue-query' }
---

View File

@@ -0,0 +1,39 @@
---
id: query-retries
title: Query Retries
ref: docs/framework/react/guides/query-retries.md
replace: { 'Provider': 'Plugin' }
---
[//]: # 'Example'
```tsx
import { useQuery } from '@tanstack/vue-query'
// Make a specific query retry a certain number of times
const result = useQuery({
queryKey: ['todos', 1],
queryFn: fetchTodoListPage,
retry: 10, // Will retry failed requests 10 times before displaying an error
})
```
[//]: # 'Example'
[//]: # 'Example2'
```ts
import { VueQueryPlugin } from '@tanstack/vue-query'
const vueQueryPluginOptions = {
queryClientConfig: {
defaultOptions: {
queries: {
retryDelay: (attemptIndex) => Math.min(1000 * 2 ** attemptIndex, 30000),
},
},
},
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
```
[//]: # 'Example2'

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@@ -0,0 +1,5 @@
---
id: scroll-restoration
title: Scroll Restoration
ref: docs/framework/react/guides/scroll-restoration.md
---

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@@ -0,0 +1,278 @@
---
id: ssr
title: SSR
---
Vue Query supports prefetching multiple queries on the server and then _dehydrating_ those queries to the queryClient. This means the server can prerender markup that is immediately available on page load and as soon as JS is available, Vue Query can upgrade or _hydrate_ those queries with the full functionality of the library. This includes refetching those queries on the client if they have become stale since the time they were rendered on the server.
## Using Nuxt.js
### Nuxt 3
First create `vue-query.ts` file in your `plugins` directory with the following content:
```ts
import type {
DehydratedState,
VueQueryPluginOptions,
} from '@tanstack/vue-query'
import {
VueQueryPlugin,
QueryClient,
hydrate,
dehydrate,
} from '@tanstack/vue-query'
// Nuxt 3 app aliases
import { defineNuxtPlugin, useState } from '#imports'
export default defineNuxtPlugin((nuxt) => {
const vueQueryState = useState<DehydratedState | null>('vue-query')
// Modify your Vue Query global settings here
const queryClient = new QueryClient({
defaultOptions: { queries: { staleTime: 5000 } },
})
const options: VueQueryPluginOptions = { queryClient }
nuxt.vueApp.use(VueQueryPlugin, options)
if (import.meta.server) {
nuxt.hooks.hook('app:rendered', () => {
vueQueryState.value = dehydrate(queryClient)
})
}
if (import.meta.client && vueQueryState.value !== null) {
hydrate(queryClient, vueQueryState.value)
}
})
```
Now you are ready to prefetch some data in your pages with `onServerPrefetch`.
- Prefetch all the queries that you need with `queryClient.query`, `queryClient.infiniteQuery`, or `suspense`
```ts
export default defineComponent({
setup() {
const queryClient = useQueryClient()
const { data } = useQuery({
queryKey: ['test'],
queryFn: fetcher,
})
onServerPrefetch(async () => {
await suspense()
})
return { data }
},
})
```
### Nuxt 2
First create `vue-query.js` file in your `plugins` directory with the following content:
```js
import Vue from 'vue'
import { VueQueryPlugin, QueryClient, hydrate } from '@tanstack/vue-query'
export default (context) => {
// Modify your Vue Query global settings here
const queryClient = new QueryClient({
defaultOptions: { queries: { staleTime: 5000 } },
})
if (process.server) {
context.ssrContext.VueQuery = queryClient
}
if (process.client) {
Vue.use(VueQueryPlugin, { queryClient })
if (context.nuxtState && context.nuxtState.vueQueryState) {
hydrate(queryClient, context.nuxtState.vueQueryState)
}
}
}
```
Add this plugin to your `nuxt.config.js`
```js
module.exports = {
...
plugins: ['~/plugins/vue-query.js'],
}
```
Now you are ready to prefetch some data in your pages with `onServerPrefetch`.
- Use `useContext` to get nuxt context
- Use `useQueryClient` to get server-side instance of `queryClient`
- Prefetch all the queries that you need with `queryClient.query`, `queryClient.infiniteQuery`, or `suspense`
- Dehydrate `queryClient` to the `nuxtContext`
```vue
// pages/todos.vue
<template>
<div>
<button @click="refetch">Refetch</button>
<p>{{ data }}</p>
</div>
</template>
<script lang="ts">
import {
defineComponent,
onServerPrefetch,
useContext,
} from '@nuxtjs/composition-api'
import { useQuery, useQueryClient, dehydrate } from '@tanstack/vue-query'
export default defineComponent({
setup() {
// Get QueryClient either from SSR context, or Vue context
const { ssrContext } = useContext()
// Make sure to provide `queryClient` as a second parameter to `useQuery` calls
const queryClient =
(ssrContext != null && ssrContext.VueQuery) || useQueryClient()
// This will be prefetched and sent from the server
const { data, refetch, suspense } = useQuery(
{
queryKey: ['todos'],
queryFn: getTodos,
},
queryClient,
)
// This won't be prefetched, it will start fetching on client side
const { data2 } = useQuery(
{
queryKey: ['todos2'],
queryFn: getTodos,
},
queryClient,
)
onServerPrefetch(async () => {
await suspense()
ssrContext.nuxt.vueQueryState = dehydrate(queryClient)
})
return {
refetch,
data,
}
},
})
</script>
```
As demonstrated, it's fine to prefetch some queries and let others fetch on the client. This means you can control what content server renders or not by adding or removing `queryClient.query` or `suspense` for a specific query.
## Using Vite SSR
Sync VueQuery client state with [vite-ssr](https://github.com/frandiox/vite-ssr) in order to serialize it in the DOM:
```js
// main.js (entry point)
import App from './App.vue'
import viteSSR from 'vite-ssr/vue'
import {
QueryClient,
VueQueryPlugin,
hydrate,
dehydrate,
} from '@tanstack/vue-query'
export default viteSSR(App, { routes: [] }, ({ app, initialState }) => {
// -- This is Vite SSR main hook, which is called once per request
// Create a fresh VueQuery client
const queryClient = new QueryClient()
// Sync initialState with the client state
if (import.meta.env.SSR) {
// Indicate how to access and serialize VueQuery state during SSR
initialState.vueQueryState = { toJSON: () => dehydrate(queryClient) }
} else {
// Reuse the existing state in the browser
hydrate(queryClient, initialState.vueQueryState)
}
// Mount and provide the client to the app components
app.use(VueQueryPlugin, { queryClient })
})
```
Then, call VueQuery from any component using Vue's `onServerPrefetch`:
```html
<!-- MyComponent.vue -->
<template>
<div>
<button @click="refetch">Refetch</button>
<p>{{ data }}</p>
</div>
</template>
<script setup>
import { useQuery } from '@tanstack/vue-query'
import { onServerPrefetch } from 'vue'
// This will be prefetched and sent from the server
const { refetch, data, suspense } = useQuery({
queryKey: ['todos'],
queryFn: getTodos,
})
onServerPrefetch(suspense)
</script>
```
## Tips, Tricks and Caveats
### Only successful queries are included in dehydration
Any query with an error is automatically excluded from dehydration. This means that the default behavior is to pretend these queries were never loaded on the server, usually showing a loading state instead, and retrying the queries on the queryClient. This happens regardless of error.
Sometimes this behavior is not desirable, maybe you want to render an error page with a correct status code instead on certain errors or queries. In those cases, use `queryClient.query` and catch any errors to handle those manually.
### Staleness is measured from when the query was fetched on the server
A query is considered stale depending on when it was `dataUpdatedAt`. A caveat here is that the server needs to have the correct time for this to work properly, but UTC time is used, so timezones do not factor into this.
Because `staleTime` defaults to `0`, queries will be refetched in the background on page load by default. You might want to use a higher `staleTime` to avoid this double fetching, especially if you don't cache your markup.
This refetching of stale queries is a perfect match when caching markup in a CDN! You can set the cache time of the page itself decently high to avoid having to re-render pages on the server, but configure the `staleTime` of the queries lower to make sure data is refetched in the background as soon as a user visits the page. Maybe you want to cache the pages for a week, but refetch the data automatically on page load if it's older than a day?
### High memory consumption on server
In case you are creating the `QueryClient` for every request, Vue Query creates the isolated cache for this client, which is preserved in memory for the `gcTime` period. That may lead to high memory consumption on server in case of high number of requests during that period.
On the server, `gcTime` defaults to `Infinity` which disables manual garbage collection and will automatically clear memory once a request has finished. If you are explicitly setting a non-Infinity `gcTime` then you will be responsible for clearing the cache early.
To clear the cache after it is not needed and to lower memory consumption, you can add a call to [`queryClient.clear()`](../reference/classes/QueryClient.md#clear) after the request is handled and dehydrated state has been sent to the client.
## `dehydrate`/`hydrate` options
`dehydrate` and `hydrate` are re-exported from `@tanstack/query-core`, so they're available directly from `@tanstack/vue-query` — as used throughout this guide.
`dehydrate(client, options?)` accepts a `DehydrateOptions` object:
- `shouldDehydrateMutation: (mutation) => boolean` — whether to dehydrate a given mutation. Called for each mutation in the cache; defaults to only including paused mutations. To extend the default behavior instead of replacing it, import and call `defaultShouldDehydrateMutation` as part of your return statement.
- `shouldDehydrateQuery: (query) => boolean` — whether to dehydrate a given query. Called for each query in the cache; defaults to only including successful queries (see [above](#only-successful-queries-are-included-in-dehydration)). Extend it the same way, with `defaultShouldDehydrateQuery`.
- `serializeData?: (data) => any` — transforms (serializes) data during dehydration.
- `shouldRedactErrors?: (error) => boolean` — only applies to queries still `pending` at dehydration time, whose promise is dehydrated too: decides whether to redact the error if that promise later rejects. Defaults to redacting all such errors. Does **not** apply to `query.state.error` on already-settled queries — that error is included in the dehydrated state as-is, so sanitize it yourself via `shouldDehydrateQuery` if it may contain sensitive data.
`hydrate(client, dehydratedState, options?)` accepts a `HydrateOptions` object:
- `defaultOptions.mutations` — default mutation options for the hydrated mutations.
- `defaultOptions.queries` — default query options for the hydrated queries.
- `defaultOptions.deserializeData?: (data) => any` — transforms (deserializes) data before it's put into the cache.
One caveat with `hydrate`: if a query being hydrated already exists in the cache, it's only overwritten when the incoming data is newer than what's already there — otherwise it's silently skipped.
Alternatively, you can set a smaller `gcTime`.

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@@ -0,0 +1,57 @@
---
id: suspense
title: Suspense (experimental)
---
> NOTE: Suspense mode for Vue Query is experimental, same as Vue's Suspense itself. These APIs WILL change and should not be used in production unless you lock both your Vue and Vue Query versions to patch-level versions that are compatible with each other.
Vue Query can also be used with Vue's new [Suspense](https://vuejs.org/guide/built-ins/suspense.html) API's.
To do that you need to wrap your suspendable component with `Suspense` component provided by Vue
```vue
<script setup>
import SuspendableComponent from './SuspendableComponent.vue'
</script>
<template>
<Suspense>
<template #default>
<SuspendableComponent />
</template>
<template #fallback>
<div>Loading...</div>
</template>
</Suspense>
</template>
```
And change your `setup` function in suspendable component to be `async`. Then you can use async `suspense` function that is provided by `vue-query`.
```vue
<script>
import { defineComponent } from 'vue'
import { useQuery } from '@tanstack/vue-query'
const todoFetcher = async () =>
await fetch('https://jsonplaceholder.cypress.io/todos').then((response) =>
response.json(),
)
export default defineComponent({
name: 'SuspendableComponent',
async setup() {
const { data, suspense } = useQuery({
queryKey: ['todos'],
queryFn: todoFetcher,
})
await suspense()
return { data }
},
})
</script>
```
## Fetch-on-render vs Render-as-you-fetch
Out of the box, Vue Query in `suspense` mode works really well as a **Fetch-on-render** solution with no additional configuration. This means that when your components attempt to mount, they will trigger query fetching and suspend, but only once you have imported them and mounted them. If you want to take it to the next level and implement a **Render-as-you-fetch** model, we recommend implementing [Prefetching](./prefetching) on routing callbacks and/or user interactions events to start loading queries before they are mounted and hopefully even before you start importing or mounting their parent components.

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---
id: testing
title: Testing
---

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@@ -0,0 +1,5 @@
---
id: updates-from-mutation-responses
title: Updates from Mutation Responses
ref: docs/framework/react/guides/updates-from-mutation-responses.md
---

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@@ -0,0 +1,25 @@
---
id: window-focus-refetching
title: Window Focus Refetching
ref: docs/framework/react/guides/window-focus-refetching.md
replace: { '@tanstack/react-query': '@tanstack/vue-query' }
---
[//]: # 'Example'
```js
const vueQueryPluginOptions: VueQueryPluginOptions = {
queryClientConfig: {
defaultOptions: {
queries: {
refetchOnWindowFocus: false,
},
},
},
}
app.use(VueQueryPlugin, vueQueryPluginOptions)
```
[//]: # 'Example'
[//]: # 'ReactNative'
[//]: # 'ReactNative'

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@@ -0,0 +1,67 @@
---
id: installation
title: Installation
---
You can install Vue Query via [NPM](https://npmjs.com).
### NPM
```bash
npm i @tanstack/vue-query
```
or
```bash
pnpm add @tanstack/vue-query
```
or
```bash
yarn add @tanstack/vue-query
```
or
```bash
bun add @tanstack/vue-query
```
> Wanna give it a spin before you download? Try out the [basic](./examples/basic) example!
Vue Query is compatible with Vue 2.x and 3.x
> If you are using Vue 2.6, make sure to also setup [@vue/composition-api](https://github.com/vuejs/composition-api)
### Vue Query Initialization
Before using Vue Query, you need to initialize it using `VueQueryPlugin`
```tsx
import { VueQueryPlugin } from '@tanstack/vue-query'
app.use(VueQueryPlugin)
```
### Use of Composition API with `<script setup>`
All examples in our documentation use [`<script setup>`](https://staging.vuejs.org/api/sfc-script-setup.html) syntax.
Vue 2 users can also use that syntax using [this plugin](https://github.com/antfu/unplugin-vue2-script-setup). Please check the plugin documentation for installation details.
If you are not a fan of `<script setup>` syntax, you can easily translate all the examples into normal Composition API syntax by moving the code under `setup()` function and returning the values used in the template.
```vue
<script setup>
import { useQuery } from '@tanstack/vue-query'
const { isPending, isFetching, isError, data, error } = useQuery({
queryKey: ['todos'],
queryFn: getTodos,
})
</script>
<template>...</template>
```

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@@ -0,0 +1,16 @@
---
id: overview
title: Overview
ref: docs/framework/react/overview.md
replace: { 'React': 'Vue', 'react-query': 'vue-query' }
---
[//]: # 'Example'
[//]: # 'Example'
[//]: # 'Materials'
## You talked me into it, so what now?
- Learn Vue Query at your own pace with our amazingly thorough [Walkthrough Guide](./installation) and [API Reference](./reference/functions/useQuery)
[//]: # 'Materials'

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@@ -0,0 +1,5 @@
---
id: broadcastQueryClient
title: broadcastQueryClient (Experimental)
ref: docs/framework/react/plugins/broadcastQueryClient.md
---

View File

@@ -0,0 +1,200 @@
---
id: createPersister
title: experimental_createQueryPersister
---
## Installation
This utility comes as a separate package and is available under the `'@tanstack/query-persist-client-core'` import.
```bash
npm install @tanstack/query-persist-client-core
```
or
```bash
pnpm add @tanstack/query-persist-client-core
```
or
```bash
yarn add @tanstack/query-persist-client-core
```
or
```bash
bun add @tanstack/query-persist-client-core
```
## Usage
- Import the `experimental_createQueryPersister` function
- Create a new `experimental_createQueryPersister`
- you can pass any `storage` to it that adheres to the `AsyncStorage` interface
- Pass that `persister` as an option to your Query. This can be done either by passing it to the `defaultOptions` of the `QueryClient` or to any `useQuery` hook instance.
- If you pass this `persister` as `defaultOptions`, all queries will be persisted to the provided `storage`. You can additionally narrow this down by passing `filters`. In contrast to the `persistClient` plugin, this will not persist the whole query client as a single item, but each query separately. As a key, the query hash is used.
- If you provide this `persister` to a single `useQuery` hook, only this Query will be persisted.
- Note: `queryClient.setQueryData()` operations are not persisted, this means that if you perform an optimistic update and refresh the page before the query has been invalidated, your changes to the query data will be lost. See https://github.com/TanStack/query/issues/6310
This way, you do not need to store whole `QueryClient`, but choose what is worth to be persisted in your application. Each query is lazily restored (when the Query is first used) and persisted (after each run of the `queryFn`), so it does not need to be throttled. `staleTime` is also respected after restoring the Query, so if data is considered `stale`, it will be refetched immediately after restoring. If data is `fresh`, the `queryFn` will not run.
Garbage collecting a Query from memory **does not** affect the persisted data. That means Queries can be kept in memory for a shorter period of time to be more **memory efficient**. If they are used the next time, they will just be restored from the persistent storage again.
```tsx
import { QueryClient } from '@tanstack/vue-query'
import { experimental_createQueryPersister } from '@tanstack/query-persist-client-core'
const persister = experimental_createQueryPersister({
storage: AsyncStorage,
maxAge: 1000 * 60 * 60 * 12, // 12 hours
})
const queryClient = new QueryClient({
defaultOptions: {
queries: {
gcTime: 1000 * 30, // 30 seconds
persister: persister.persisterFn,
},
},
})
```
### Adapted defaults
The `createPersister` plugin technically wraps the `queryFn`, so it doesn't restore if the `queryFn` doesn't run. In that way, it acts as a caching layer between the Query and the network. Thus, the `networkMode` defaults to `'offlineFirst'` when a persister is used, so that restoring from the persistent storage can also happen even if there is no network connection.
## Additional utilities
Invoking `experimental_createQueryPersister` returns additional utilities in addition to `persisterFn` for easier implementation of userland functionalities.
### `persistQueryByKey(queryKey: QueryKey, queryClient: QueryClient): Promise<void>`
This function will persist `Query` to storage and key defined when creating persister.
This utility might be used along `setQueryData` to persist optimistic update to storage without waiting for invalidation.
```tsx
const persister = experimental_createQueryPersister({
storage: AsyncStorage,
maxAge: 1000 * 60 * 60 * 12, // 12 hours
})
const queryClient = useQueryClient()
useMutation({
mutationFn: updateTodo,
onMutate: async (newTodo) => {
...
// Optimistically update to the new value
queryClient.setQueryData(['todos'], (old) => [...old, newTodo])
// And persist it to storage
persister.persistQueryByKey(['todos'], queryClient)
...
},
})
```
### `retrieveQuery<T>(queryHash: string): Promise<T | undefined>`
This function would attempt to retrieve persisted query by `queryHash`.
If `query` is `expired`, `busted` or `malformed` it would be removed from the storage instead, and `undefined` would be returned.
### `persisterGc(): Promise<void>`
This function can be used to sporadically clean up storage from `expired`, `busted` or `malformed` entries.
For this function to work, your storage must expose `entries` method that would return a `key-value tuple array`.
For example `Object.entries(localStorage)` for `localStorage` or `entries` from `idb-keyval`.
### `restoreQueries(queryClient: QueryClient, filters): Promise<void>`
This function can be used to restore queries that are currently stored by persister.
For example when your app is starting up in offline mode, or you want all or only specific data from previous session to be immediately available without intermediate `loading` state.
The filter object supports the following properties:
- `queryKey?: QueryKey`
- Set this property to define a query key to match on.
- `exact?: boolean`
- If you don't want to search queries inclusively by query key, you can pass the `exact: true` option to return only the query with the exact query key you have passed.
For this function to work, your storage must expose `entries` method that would return a `key-value tuple array`.
For example `Object.entries(localStorage)` for `localStorage` or `entries` from `idb-keyval`.
## API
### `experimental_createQueryPersister`
```tsx
experimental_createQueryPersister(options: StoragePersisterOptions)
```
#### `Options`
```tsx
export interface StoragePersisterOptions {
/** The storage client used for setting and retrieving items from cache.
* For SSR pass in `undefined`.
*/
storage: AsyncStorage | Storage | undefined | null
/**
* How to serialize the data to storage.
* @default `JSON.stringify`
*/
serialize?: (persistedQuery: PersistedQuery) => string
/**
* How to deserialize the data from storage.
* @default `JSON.parse`
*/
deserialize?: (cachedString: string) => PersistedQuery
/**
* A unique string that can be used to forcefully invalidate existing caches,
* if they do not share the same buster string
*/
buster?: string
/**
* The max-allowed age of the cache in milliseconds.
* If a persisted cache is found that is older than this
* time, it will be discarded
* @default 24 hours
*/
maxAge?: number
/**
* Prefix to be used for storage key.
* Storage key is a combination of prefix and query hash in a form of `prefix-queryHash`.
*/
prefix?: string
/**
* If set to `true`, the query will refetch on successful query restoration if the data is stale.
* If set to `false`, the query will not refetch on successful query restoration.
* If set to `'always'`, the query will always refetch on successful query restoration.
* Defaults to `true`.
*/
refetchOnRestore?: boolean | 'always'
/**
* Filters to narrow down which Queries should be persisted.
*/
filters?: QueryFilters
}
interface AsyncStorage<TStorageValue = string> {
getItem: (key: string) => MaybePromise<TStorageValue | undefined | null>
setItem: (key: string, value: TStorageValue) => MaybePromise<unknown>
removeItem: (key: string) => MaybePromise<void>
entries?: () => MaybePromise<Array<[key: string, value: TStorageValue]>>
}
```
The default options are:
```tsx
{
prefix = 'tanstack-query',
maxAge = 1000 * 60 * 60 * 24,
serialize = JSON.stringify,
deserialize = JSON.parse,
refetchOnRestore = true,
}
```

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@@ -0,0 +1,53 @@
---
id: quick-start
title: Quick Start
ref: docs/framework/react/quick-start.md
replace: { 'React': 'Vue', 'react-query': 'vue-query' }
---
[//]: # 'Example'
If you're looking for a fully functioning example, please have a look at our [basic codesandbox example](./examples/basic)
```vue
<script setup>
import { useQueryClient, useQuery, useMutation } from '@tanstack/vue-query'
// Access QueryClient instance
const queryClient = useQueryClient()
// Query
const { isPending, isError, data, error } = useQuery({
queryKey: ['todos'],
queryFn: getTodos,
})
// Mutation
const mutation = useMutation({
mutationFn: postTodo,
onSuccess: () => {
// Invalidate and refetch
queryClient.invalidateQueries({ queryKey: ['todos'] })
},
})
function onButtonClick() {
mutation.mutate({
id: Date.now(),
title: 'Do Laundry',
})
}
</script>
<template>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<!-- We can assume by this point that `isSuccess === true` -->
<ul v-else>
<li v-for="todo in data" :key="todo.id">{{ todo.title }}</li>
</ul>
<button @click="onButtonClick">Add Todo</button>
</template>
```
[//]: # 'Example'

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@@ -0,0 +1,173 @@
---
id: reactivity
title: Reactivity
---
Vue uses the [the signals paradigm](https://vuejs.org/guide/extras/reactivity-in-depth.html#connection-to-signals) to handle and track reactivity. A key feature of
this system is the reactive system only triggers updates on specifically watched reactive properties. A consequence of this is you also need to ensure that the queries are updated when values they consume are updated.
## Keeping Queries Reactive
When creating a composable for a query your first choice may be to write it like so:
```ts
export function useUserProjects(userId: string) {
return useQuery(
queryKey: ['userProjects', userId],
queryFn: () => api.fetchUserProjects(userId),
);
}
```
We might consume this composable like so:
```ts
// Reactive user ID ref.
const userId = ref('1')
// Fetches the user 1's projects.
const { data: projects } = useUserProjects(userId.value)
const onChangeUser = (newUserId: string) => {
// Edits the userId, but the query will not re-fetch.
userId.value = newUserId
}
```
This code will not work as intended. This is because we are extracting the value from the userId ref directly. Vue-query is not tracking the `userId` `ref` so it has no way of knowing when the value changes.
Luckily, the fix for this is trivial. The value must be made trackable in the query key. We can Just accept the `ref` directly in the composable and place it in the query key:
```ts
export function useUserProjects(userId: Ref<string>) {
return useQuery(
queryKey: ['userProjects', userId],
queryFn: () => api.fetchUserProjects(userId.value),
);
}
```
Now the query will re-fetch when the `userId` changes.
```ts
const onChangeUser = (newUserId: string) => {
// Query refetches data with new user ID!
userId.value = newUserId
}
```
In vue query any reactive properties within a query key are tracked for changes automatically. This allows vue-query to refetch data whenever the
parameters for a given request change.
### Accounting for Non-Reactive Queries
While far less likely, sometimes passing non-reactive variables is intentional. For example, some entities only need to be fetched once and don't need tracking or we invalidate a mutation a query options object after a mutation.
If we use our custom composable defined above the usage in this case feels a bit off:
```ts
const { data: projects } = useUserProjects(ref('1'))
```
We have to create an intermediate `ref` just to make the parameter type-compatible. We can do better here. Let's instead update our composable to accept both plain values and reactive values:
```ts
export function useUserProjects(userId: MaybeRef<string>) {
return useQuery(
queryKey: ['userProjects', userId],
queryFn: () => api.fetchUserProjects(toValue(userId)),
);
}
```
Now we can use the composable with both plain values and refs:
```ts
// Fetches the user 1's projects, userId is not expected to change.
const { data: projects } = useUserProjects('1')
// Fetches the user 1's projects, queries will react to changes on userId.
const userId = ref('1')
// Make some changes to userId...
// Query re-fetches based on any changes to userId.
const { data: projects } = useUserProjects(userId)
```
### Using Derived State inside Queries
It's quite common to derive some new reactive state from another source of reactive state. Commonly, this problem manifests in situations where you deal with component props. Let's assume our `userId` is a prop passed to a component:
```vue
<script setup lang="ts">
const props = defineProps<{
userId: string
}>()
</script>
```
You may be tempted to use the prop directly in the query like so:
```ts
// Won't react to changes in props.userId.
const { data: projects } = useUserProjects(props.userId)
```
However, similar to the first example, this is not reactive. Property access on `reactive` variables causes reactivity to be lost. We can fix this by making this derived state reactive via a `computed`:
```ts
const userId = computed(() => props.userId)
// Reacts to changes in props.userId.
const { data: projects } = useUserProjects(userId)
```
This works as expected, however, this solution isn't always the most optimal. Aside from the introduction of an intermediate variable, we also create a memoized value that is somewhat unnecessary. For trivial cases of simple property access `computed` is an optimization with no real benefit. In these cases a more appropriate solution is to use [reactive getters](https://blog.vuejs.org/posts/vue-3-3#better-getter-support-with-toref-and-tovalue). Reactive getters are simply functions that return a value based on some reactive state, similar to how `computed` works. Unlike `computed`, reactive getters do not memoize their values so it makes it a good candidate for simple property access.
Let's once again refactor our composable, but this time we'll have it accept a `ref`, plain value, or a reactive getter:
```ts
export function useUserProjects(userId: MaybeRefOrGetter<string>) {
...
}
```
Let's adjust our usage and now use a reactive getter:
```ts
// Reacts to changes in props.userId. No `computed` needed!
const { data: projects } = useUserProjects(() => props.userId)
```
This gives us a terse syntax and the reactivity we need without any unneeded memoization overhead.
### Other tracked Query Options
Above, we only touched one query option that tracks reactive dependencies. However, in addition to `queryKey`, `enabled` also allows
the use of reactive values. This comes in handy in situations where you want to control the fetching of a query based on some derived state:
```ts
export function useUserProjects(userId: MaybeRef<string>) {
return useQuery(
queryKey: ['userProjects', userId],
queryFn: () => api.fetchUserProjects(toValue(userId)),
enabled: () => userId.value === activeUserId.value,
);
}
```
More details on this option can be found on the [useQuery reference](./reference/functions/useQuery.md) page.
### Immutability
Results from `useQuery` are always immutable. This is necessary for performance and caching purposes. If you need to mutate a value returned from `useQuery`, you must create a copy of the data.
One implication of this design is that passing values from `useQuery` to a two-way binding such as `v-model` will not work. You must create a mutable copy of the data before attempting to update it in place.
## Key Takeaways
- `enabled` and `queryKey` are the two query options that can accept reactive values.
- Pass query option that accept all three types of values in Vue: refs, plain values, and reactive getters.
- If you expect a query to react to changes based on the values it consumes, ensure that the values are reactive. (i.e. pass in refs directly to the query, or use reactive getters)
- If you don't need a query to be reactive pass in a plain value.
- For trivial derived state such as property access consider using a reactive getter in place of a `computed`.
- Results from `useQuery` are always immutable.

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---
id: CancelledError
title: CancelledError
---
Defined in: [packages/query-core/src/retryer.ts:77](https://github.com/TanStack/query/blob/main/packages/query-core/src/retryer.ts#L77)
The error thrown by a `Retryer` (and surfaced to `query.promise`/`mutation`) when a fetch is cancelled, e.g. via
`query.cancel()`. `revert`, if `true`, tells the caller to restore the state the query was in before the fetch
started instead of surfacing the error. `silent`, if `true`, tells the caller to suppress this error and instead
resolve with the promise of the fetch that triggered the cancellation.
## Example
```ts
query.cancel()
try {
await query.promise
} catch (error) {
if (error instanceof CancelledError) {
// the fetch was cancelled, e.g. via `query.cancel()`
}
}
```
## Extends
- `Error`
## Constructors
### Constructor
```ts
new CancelledError(options?): CancelledError;
```
Defined in: [packages/query-core/src/retryer.ts:80](https://github.com/TanStack/query/blob/main/packages/query-core/src/retryer.ts#L80)
#### Parameters
##### options?
[`CancelOptions`](../interfaces/CancelOptions.md)
#### Returns
`CancelledError`
#### Overrides
```ts
Error.constructor
```
## Properties
### cause?
```ts
optional cause: unknown;
```
Defined in: node\_modules/.pnpm/typescript@6.0.3/node\_modules/typescript/lib/lib.es2022.error.d.ts:24
#### Inherited from
```ts
Error.cause
```
***
### message
```ts
message: string;
```
Defined in: node\_modules/.pnpm/typescript@6.0.3/node\_modules/typescript/lib/lib.es5.d.ts:1075
#### Inherited from
```ts
Error.message
```
***
### name
```ts
name: string;
```
Defined in: node\_modules/.pnpm/typescript@6.0.3/node\_modules/typescript/lib/lib.es5.d.ts:1074
#### Inherited from
```ts
Error.name
```
***
### revert?
```ts
optional revert: boolean;
```
Defined in: [packages/query-core/src/retryer.ts:78](https://github.com/TanStack/query/blob/main/packages/query-core/src/retryer.ts#L78)
***
### silent?
```ts
optional silent: boolean;
```
Defined in: [packages/query-core/src/retryer.ts:79](https://github.com/TanStack/query/blob/main/packages/query-core/src/retryer.ts#L79)
***
### stack?
```ts
optional stack: string;
```
Defined in: node\_modules/.pnpm/typescript@6.0.3/node\_modules/typescript/lib/lib.es5.d.ts:1076
#### Inherited from
```ts
Error.stack
```
***
### stackTraceLimit
```ts
static stackTraceLimit: number;
```
Defined in: node\_modules/.pnpm/@types+node@22.19.15/node\_modules/@types/node/globals.d.ts:68
The `Error.stackTraceLimit` property specifies the number of stack frames
collected by a stack trace (whether generated by `new Error().stack` or
`Error.captureStackTrace(obj)`).
The default value is `10` but may be set to any valid JavaScript number. Changes
will affect any stack trace captured _after_ the value has been changed.
If set to a non-number value, or set to a negative number, stack traces will
not capture any frames.
#### Inherited from
```ts
Error.stackTraceLimit
```
## Methods
### captureStackTrace()
```ts
static captureStackTrace(targetObject, constructorOpt?): void;
```
Defined in: node\_modules/.pnpm/@types+node@22.19.15/node\_modules/@types/node/globals.d.ts:52
Creates a `.stack` property on `targetObject`, which when accessed returns
a string representing the location in the code at which
`Error.captureStackTrace()` was called.
```js
const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack; // Similar to `new Error().stack`
```
The first line of the trace will be prefixed with
`${myObject.name}: ${myObject.message}`.
The optional `constructorOpt` argument accepts a function. If given, all frames
above `constructorOpt`, including `constructorOpt`, will be omitted from the
generated stack trace.
The `constructorOpt` argument is useful for hiding implementation
details of error generation from the user. For instance:
```js
function a() {
b();
}
function b() {
c();
}
function c() {
// Create an error without stack trace to avoid calculating the stack trace twice.
const { stackTraceLimit } = Error;
Error.stackTraceLimit = 0;
const error = new Error();
Error.stackTraceLimit = stackTraceLimit;
// Capture the stack trace above function b
Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
throw error;
}
a();
```
#### Parameters
##### targetObject
`object`
##### constructorOpt?
`Function`
#### Returns
`void`
#### Inherited from
```ts
Error.captureStackTrace
```
***
### prepareStackTrace()
```ts
static prepareStackTrace(err, stackTraces): any;
```
Defined in: node\_modules/.pnpm/@types+node@22.19.15/node\_modules/@types/node/globals.d.ts:56
#### Parameters
##### err
`Error`
##### stackTraces
`CallSite`[]
#### Returns
`any`
#### See
https://v8.dev/docs/stack-trace-api#customizing-stack-traces
#### Inherited from
```ts
Error.prepareStackTrace
```

View File

@@ -0,0 +1,665 @@
---
id: InfiniteQueryObserver
title: InfiniteQueryObserver
---
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:41](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L41)
An `InfiniteQueryObserver` extends `QueryObserver` to observe and switch
between infinite queries. It augments the base `QueryObserverResult` with
infinite-query-specific fields and methods, such as `hasNextPage` and
`fetchNextPage`, and is the primitive that framework adapters (e.g.
`useInfiniteQuery`) build their hooks on top of.
## Example
```ts
const observer = new InfiniteQueryObserver(queryClient, {
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextCursor,
})
const unsubscribe = observer.subscribe((result) => console.log(result))
```
## Extends
- [`QueryObserver`](QueryObserver.md)\<`TQueryFnData`, `TError`, `TData`, [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `TPageParam`\>, `TQueryKey`\>
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`\>
### TQueryKey
`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
### TPageParam
`TPageParam` = `unknown`
## Constructors
### Constructor
```ts
new InfiniteQueryObserver<TQueryFnData, TError, TData, TQueryKey, TPageParam>(client, options): InfiniteQueryObserver<TQueryFnData, TError, TData, TQueryKey, TPageParam>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:83](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L83)
#### Parameters
##### client
`QueryClient`
##### options
[`InfiniteQueryObserverOptions`](../interfaces/InfiniteQueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
#### Returns
`InfiniteQueryObserver`\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
#### Overrides
[`QueryObserver`](QueryObserver.md).[`constructor`](QueryObserver.md#constructor)
## Properties
### fetch
```ts
protected fetch: ReplaceReturnType<(fetchOptions) => Promise<QueryObserverResult<TData, TError>>, Promise<InfiniteQueryObserverResult<TData, TError>>>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:72](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L72)
#### Overrides
```ts
QueryObserver.fetch
```
***
### getCurrentResult
```ts
getCurrentResult: ReplaceReturnType<() => QueryObserverResult<TData, TError>, InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:60](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L60)
Returns the most recently computed `QueryObserverResult` for the
observed query. This is a point-in-time read; to be notified of updates
as they happen, subscribe to the observer instead (its inherited
`subscribe` method).
#### Example
```ts
const result = observer.getCurrentResult()
console.log(result.status, result.data)
```
#### Overrides
```ts
QueryObserver.getCurrentResult
```
***
### listeners
```ts
protected listeners: Set<QueryObserverListener<TData, TError>>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`listeners`](QueryObserver.md#listeners)
***
### options
```ts
options: QueryObserverOptions<TQueryFnData, TError, TData, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/queryObserver.ts:89](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L89)
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`options`](QueryObserver.md#options)
***
### subscribe()
```ts
subscribe: (listener) => () => void;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:55](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L55)
#### Parameters
##### listener
`InfiniteQueryObserverListener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Overrides
```ts
QueryObserver.subscribe
```
## Methods
### bindMethods()
```ts
protected bindMethods(): void;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:96](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L96)
#### Returns
`void`
#### Overrides
[`QueryObserver`](QueryObserver.md).[`bindMethods`](QueryObserver.md#bindmethods)
***
### createResult()
```ts
protected createResult(query, options): InfiniteQueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:201](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L201)
#### Parameters
##### query
[`Query`](Query.md)\<`TQueryFnData`, `TError`, [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `TPageParam`\>, `TQueryKey`\>
##### options
[`InfiniteQueryObserverOptions`](../interfaces/InfiniteQueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
#### Returns
[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>
#### Overrides
[`QueryObserver`](QueryObserver.md).[`createResult`](QueryObserver.md#createresult)
***
### destroy()
```ts
destroy(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:161](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L161)
Stops observing the current query: clears all listeners, cancels the
stale and refetch-interval timers, and removes this observer from the
query it was observing.
#### Returns
`void`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`destroy`](QueryObserver.md#destroy)
***
### fetchNextPage()
```ts
fetchNextPage(options?): Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:161](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L161)
Fetches the next page of the infinite query and returns a promise that
resolves with the resulting `InfiniteQueryObserverResult`. The page
param used for the fetch is determined by `getNextPageParam`, which
receives the current pages/page params and whose result also determines
`hasNextPage`.
#### Parameters
##### options?
[`FetchNextPageOptions`](../interfaces/FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Example
```ts
const { hasNextPage } = observer.getCurrentResult()
if (hasNextPage) {
await observer.fetchNextPage()
}
```
#### See
[InfiniteQueryObserver#fetchPreviousPage](#fetchpreviouspage)
***
### fetchOptimistic()
```ts
fetchOptimistic(options): Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/queryObserver.ts:395](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L395)
Fetches a query defined by the given options without affecting this
observer's own tracked query or result, and returns a promise that
resolves with the `QueryObserverResult` for that fetch. This is useful
for prefetching data that another observer (e.g. a query about to be
navigated to) will need, ahead of time.
#### Parameters
##### options
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `TPageParam`\>, `TQueryKey`\>
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Example
```ts
const result = await observer.fetchOptimistic({
queryKey: ['posts', 2],
queryFn: () => fetchPost(2),
})
console.log(result.data)
```
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`fetchOptimistic`](QueryObserver.md#fetchoptimistic)
***
### fetchPreviousPage()
```ts
fetchPreviousPage(options?): Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:190](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L190)
Fetches the previous page of the infinite query and returns a promise
that resolves with the resulting `InfiniteQueryObserverResult`. The page
param used for the fetch is determined by `getPreviousPageParam`, which
receives the current pages/page params and whose result also determines
`hasPreviousPage`.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](../interfaces/FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Example
```ts
const { hasPreviousPage } = observer.getCurrentResult()
if (hasPreviousPage) {
await observer.fetchPreviousPage()
}
```
#### See
[InfiniteQueryObserver#fetchNextPage](#fetchnextpage)
***
### getCurrentQuery()
```ts
getCurrentQuery(): Query<TQueryFnData, TError, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/queryObserver.ts:357](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L357)
Returns the `Query` instance this observer is currently observing.
#### Returns
[`Query`](Query.md)\<`TQueryFnData`, `TError`, [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `TPageParam`\>, `TQueryKey`\>
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`getCurrentQuery`](QueryObserver.md#getcurrentquery)
***
### getOptimisticResult()
```ts
getOptimisticResult(options): InfiniteQueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:127](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L127)
The infinite-query counterpart of [QueryObserver#getOptimisticResult](QueryObserver.md#getoptimisticresult), marking the
options as an infinite query before delegating to it. Called by framework adapters (e.g.
`useInfiniteQuery`) ahead of subscribing, to compute the current `InfiniteQueryObserverResult`
synchronously.
#### Parameters
##### options
[`DefaultedInfiniteQueryObserverOptions`](../type-aliases/DefaultedInfiniteQueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
#### Returns
[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>
#### Overrides
[`QueryObserver`](QueryObserver.md).[`getOptimisticResult`](QueryObserver.md#getoptimisticresult)
***
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`hasListeners`](QueryObserver.md#haslisteners)
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:110](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L110)
#### Returns
`void`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`onSubscribe`](QueryObserver.md#onsubscribe)
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:124](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L124)
#### Returns
`void`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`onUnsubscribe`](QueryObserver.md#onunsubscribe)
***
### refetch()
```ts
refetch(__namedParameters): Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/queryObserver.ts:371](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L371)
Refetches the observed query and returns a promise that resolves with
the resulting `QueryObserverResult`.
#### Parameters
##### \_\_namedParameters
[`RefetchOptions`](../interfaces/RefetchOptions.md) = `{}`
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Example
```ts
const result = await observer.refetch({ cancelRefetch: false })
console.log(result.data)
```
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`refetch`](QueryObserver.md#refetch)
***
### setOptions()
```ts
setOptions(options): void;
```
Defined in: [packages/query-core/src/infiniteQueryObserver.ts:108](https://github.com/TanStack/query/blob/main/packages/query-core/src/infiniteQueryObserver.ts#L108)
Updates the observer's options. Behaves the same as
`QueryObserver.setOptions`, additionally marking the options as
belonging to an infinite query before delegating to the base
implementation.
#### Parameters
##### options
[`InfiniteQueryObserverOptions`](../interfaces/InfiniteQueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
#### Returns
`void`
#### Overrides
[`QueryObserver`](QueryObserver.md).[`setOptions`](QueryObserver.md#setoptions)
***
### shouldFetchOnReconnect()
```ts
shouldFetchOnReconnect(): boolean;
```
Defined in: [packages/query-core/src/queryObserver.ts:135](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L135)
Returns whether the observed query is currently stale and configured
(via the `refetchOnReconnect` option) to refetch when the network
reconnects.
#### Returns
`boolean`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`shouldFetchOnReconnect`](QueryObserver.md#shouldfetchonreconnect)
***
### shouldFetchOnWindowFocus()
```ts
shouldFetchOnWindowFocus(): boolean;
```
Defined in: [packages/query-core/src/queryObserver.ts:148](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L148)
Returns whether the observed query is currently stale and configured
(via the `refetchOnWindowFocus` option) to refetch when the window
regains focus.
#### Returns
`boolean`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`shouldFetchOnWindowFocus`](QueryObserver.md#shouldfetchonwindowfocus)
***
### trackProp()
```ts
trackProp(key): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:350](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L350)
Records that the given `QueryObserverResult` property was read, so a subsequent update only
notifies this observer if a tracked property actually changed. Normally called indirectly via
[QueryObserver#trackResult](QueryObserver.md#trackresult)'s proxy; exposed directly for adapters that track property
access themselves (e.g. through their own reactivity system) instead of via the proxy.
#### Parameters
##### key
`"error"` | `"data"` | `"isError"` | `"isPending"` | `"isLoading"` | `"isLoadingError"` | `"isRefetchError"` | `"isSuccess"` | `"isPlaceholderData"` | `"status"` | `"dataUpdatedAt"` | `"errorUpdatedAt"` | `"failureCount"` | `"failureReason"` | `"errorUpdateCount"` | `"isFetched"` | `"isFetchedAfterMount"` | `"isFetching"` | `"isInitialLoading"` | `"isPaused"` | `"isRefetching"` | `"isStale"` | `"isEnabled"` | `"refetch"` | `"fetchStatus"`
#### Returns
`void`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`trackProp`](QueryObserver.md#trackprop)
***
### trackResult()
```ts
trackResult(result, onPropTracked?): QueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/queryObserver.ts:331](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L331)
Wraps a `QueryObserverResult` in a `Proxy` that records which properties are read, via
[QueryObserver#trackProp](QueryObserver.md#trackprop) (and an optional `onPropTracked` callback). Used by framework
adapters when `notifyOnChangeProps` is not set, to implement its default "only re-render on
properties you actually read" behavior.
#### Parameters
##### result
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
##### onPropTracked?
(`key`) => `void`
#### Returns
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`trackResult`](QueryObserver.md#trackresult)
***
### updateResult()
```ts
updateResult(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:735](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L735)
Recomputes and stores the current result from the current query/options, notifying listeners
if it changed. Framework adapters call this right after subscribing to make sure no query
update was missed in the gap between creating the observer and subscribing to it.
#### Returns
`void`
#### Inherited from
[`QueryObserver`](QueryObserver.md).[`updateResult`](QueryObserver.md#updateresult)

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@@ -0,0 +1,330 @@
---
id: Mutation
title: Mutation
---
Defined in: [packages/query-core/src/mutation.ts:135](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L135)
Represents a single mutation attempt. A `Mutation` holds the mutation's
options, state (data/error/status), and the `MutationObserver`s currently
subscribed to it.
Instances are created and managed internally by `MutationCache`; application
code typically interacts with mutations indirectly through `QueryClient` or
a framework hook like `useMutation`. Direct access to a `Mutation` instance
is possible via `mutationCache.find()`/`getAll()` for inspecting cache state.
## Example
```ts
const mutationCache = queryClient.getMutationCache()
const mutation = mutationCache.find({ mutationKey: ['addPost'] })
```
## Extends
- `Removable`
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TVariables
`TVariables` = `unknown`
### TOnMutateResult
`TOnMutateResult` = `unknown`
## Constructors
### Constructor
```ts
new Mutation<TData, TError, TVariables, TOnMutateResult>(config): Mutation<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/query-core/src/mutation.ts:152](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L152)
#### Parameters
##### config
`MutationConfig`\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
#### Returns
`Mutation`\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
#### Overrides
```ts
Removable.constructor
```
## Properties
### gcTime
```ts
gcTime: number;
```
Defined in: [packages/query-core/src/removable.ts:7](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L7)
#### Inherited from
```ts
Removable.gcTime
```
***
### mutationId
```ts
readonly mutationId: number;
```
Defined in: [packages/query-core/src/mutation.ts:143](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L143)
***
### options
```ts
options: MutationOptions<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/query-core/src/mutation.ts:142](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L142)
***
### state
```ts
state: MutationState<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/query-core/src/mutation.ts:141](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L141)
## Accessors
### meta
#### Get Signature
```ts
get meta(): Record<string, unknown> | undefined;
```
Defined in: [packages/query-core/src/mutation.ts:179](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L179)
The `meta` object passed in the mutation's options, if any.
##### Returns
`Record`\<`string`, `unknown`\> \| `undefined`
## Methods
### clearGcTimeout()
```ts
protected clearGcTimeout(): void;
```
Defined in: [packages/query-core/src/removable.ts:32](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L32)
#### Returns
`void`
#### Inherited from
```ts
Removable.clearGcTimeout
```
***
### continue()
```ts
continue(): Promise<unknown>;
```
Defined in: [packages/query-core/src/mutation.ts:243](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L243)
Resumes a mutation that is currently paused or was restored from a
dehydrated, still-`pending` state.
- If this mutation has an active retryer (it paused mid-attempt, e.g. due
to the network mode or scope-based queuing), its retryer is resumed.
- Otherwise, if the mutation's status is still `pending` (e.g. it was
dehydrated while an attempt was in flight and never got a retryer in
this instance), `execute` is called again with the last known variables.
- Otherwise the mutation has already settled and this resolves immediately
without running anything again.
#### Returns
`Promise`\<`unknown`\>
#### Example
```ts
// typically driven by reconnect handling, e.g. queryClient.resumePausedMutations()
const mutation = mutationCache.find({ mutationKey: ['addPost'] })
await mutation?.continue()
```
#### See
[Mutation#execute](#execute)
***
### destroy()
```ts
destroy(): void;
```
Defined in: [packages/query-core/src/removable.ts:10](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L10)
#### Returns
`void`
#### Inherited from
```ts
Removable.destroy
```
***
### execute()
```ts
execute(variables): Promise<TData>;
```
Defined in: [packages/query-core/src/mutation.ts:284](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L284)
Runs the mutation function for the given variables through a retryer, and
drives the mutation's state and lifecycle callbacks through to settlement.
If this mutation's state is already `pending` when `execute` is called
(i.e. it was restored, still in-flight, from a dehydrated state), the
`onMutate` step is skipped and a `continue` action is dispatched to
unpause it; otherwise a `pending` action is dispatched first, then the
mutation cache's `onMutate` and the mutation's own `onMutate` option are
awaited in that order, and the resulting context is stored.
The mutation function is then run (subject to `retry`/`retryDelay`/
`networkMode`, and to the mutation cache's scope-based serialization).
On success, the cache's `onSuccess`/`onSettled` callbacks run before the
mutation's own `onSuccess`/`onSettled` options, a `success` action is
dispatched, and the resolved data is returned. On failure, the same
cache-then-option ordering is used for `onError`/`onSettled`, but each of
those four callbacks is individually caught so that a throwing callback
cannot mask the original error; an `error` action is then dispatched and
the original error is re-thrown.
#### Parameters
##### variables
`TVariables`
#### Returns
`Promise`\<`TData`\>
#### Example
```ts
// Called internally by `MutationObserver.mutate` and `Mutation.continue` —
// applications normally trigger mutations through those, not this method.
const data = await mutation.execute(variables)
```
#### See
[Mutation#continue](#continue)
***
### optionalRemove()
```ts
protected optionalRemove(): void;
```
Defined in: [packages/query-core/src/mutation.ts:212](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutation.ts#L212)
#### Returns
`void`
#### Overrides
```ts
Removable.optionalRemove
```
***
### scheduleGc()
```ts
protected scheduleGc(): void;
```
Defined in: [packages/query-core/src/removable.ts:14](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L14)
#### Returns
`void`
#### Inherited from
```ts
Removable.scheduleGc
```
***
### updateGcTime()
```ts
protected updateGcTime(newGcTime): void;
```
Defined in: [packages/query-core/src/removable.ts:24](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L24)
#### Parameters
##### newGcTime
`number` | `undefined`
#### Returns
`void`
#### Inherited from
```ts
Removable.updateGcTime
```

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@@ -0,0 +1,336 @@
---
id: MutationCache
title: MutationCache
---
Defined in: [packages/vue-query/src/mutationCache.ts:15](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationCache.ts#L15)
Vue-aware subclass of `@tanstack/query-core`'s `MutationCache`. `find`/`findAll` also accept a
MaybeRefDeep filters object, so `ref`s can be passed directly without unwrapping. Access it via
`queryClient.getMutationCache()` — `QueryClient` constructs one of these by default.
## Extends
- `MutationCache`
## Constructors
### Constructor
```ts
new MutationCache(config): MutationCache;
```
Defined in: [packages/query-core/src/mutationCache.ts:129](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationCache.ts#L129)
#### Parameters
##### config
[`MutationCacheConfig`](../interfaces/MutationCacheConfig.md) = `{}`
#### Returns
`MutationCache`
#### Inherited from
```ts
MC.constructor
```
## Properties
### config
```ts
config: MutationCacheConfig = {};
```
Defined in: [packages/query-core/src/mutationCache.ts:129](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationCache.ts#L129)
#### Inherited from
```ts
MC.config
```
***
### listeners
```ts
protected listeners: Set<MutationCacheListener>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
```ts
MC.listeners
```
## Methods
### clear()
```ts
clear(): void;
```
Defined in: [packages/query-core/src/mutationCache.ts:236](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationCache.ts#L236)
Removes all mutations from the cache.
#### Returns
`void`
#### Example
```ts
const mutationCache = queryClient.getMutationCache()
mutationCache.clear()
```
#### Inherited from
```ts
MC.clear
```
***
### find()
```ts
find<TData, TError, TVariables, TOnMutateResult>(filters):
| Mutation<TData, TError, TVariables, TOnMutateResult>
| undefined;
```
Defined in: [packages/vue-query/src/mutationCache.ts:16](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationCache.ts#L16)
A slightly more advanced method that can be used to get an existing mutation instance from
the cache. If the mutation does not exist, `undefined` is returned.
This is not typically needed for most applications, but can come in handy when needing more
information about a mutation in rare scenarios.
#### Type Parameters
##### TData
`TData` = `unknown`
##### TError
`TError` = `Error`
##### TVariables
`TVariables` = `any`
##### TOnMutateResult
`TOnMutateResult` = `unknown`
#### Parameters
##### filters
`MaybeRefDeep`\<[`MutationFilters`](../interfaces/MutationFilters.md)\<`unknown`, `Error`, `unknown`, `unknown`\>\>
#### Returns
\| [`Mutation`](Mutation.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
\| `undefined`
#### See
[MutationCache#findAll](#findall)
#### Example
```ts
const mutationCache = queryClient.getMutationCache()
const mutation = mutationCache.find({ mutationKey: ['addPost'] })
```
#### Overrides
```ts
MC.find
```
***
### findAll()
```ts
findAll(filters): Mutation<unknown, Error, unknown, unknown>[];
```
Defined in: [packages/vue-query/src/mutationCache.ts:27](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationCache.ts#L27)
An even more advanced method that can be used to get existing mutation instances from the
cache that match the given filters. If no mutations match, an empty array is returned.
This is not typically needed for most applications, but can come in handy when needing more
information about mutations in rare scenarios.
#### Parameters
##### filters
`MaybeRefDeep`\<[`MutationFilters`](../interfaces/MutationFilters.md)\<`unknown`, `Error`, `unknown`, `unknown`\>\> = `{}`
#### Returns
[`Mutation`](Mutation.md)\<`unknown`, `Error`, `unknown`, `unknown`\>[]
#### See
[MutationCache#find](#find)
#### Example
```ts
const mutationCache = queryClient.getMutationCache()
const mutations = mutationCache.findAll({ mutationKey: ['addPost'] })
```
#### Overrides
```ts
MC.findAll
```
***
### getAll()
```ts
getAll(): Mutation<unknown, Error, unknown, unknown>[];
```
Defined in: [packages/query-core/src/mutationCache.ts:259](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationCache.ts#L259)
Returns all mutations within the cache.
This is not typically needed for most applications, but can come in handy when needing more
information about a mutation in rare scenarios.
#### Returns
[`Mutation`](Mutation.md)\<`unknown`, `Error`, `unknown`, `unknown`\>[]
#### Example
```ts
const mutationCache = queryClient.getMutationCache()
const mutations = mutationCache.getAll()
```
#### Inherited from
```ts
MC.getAll
```
***
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
```ts
MC.hasListeners
```
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/subscribable.ts:23](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L23)
#### Returns
`void`
#### Inherited from
```ts
MC.onSubscribe
```
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/subscribable.ts:27](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L27)
#### Returns
`void`
#### Inherited from
```ts
MC.onUnsubscribe
```
***
### subscribe()
```ts
subscribe(listener): () => void;
```
Defined in: [packages/query-core/src/subscribable.ts:8](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L8)
#### Parameters
##### listener
`MutationCacheListener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Inherited from
```ts
MC.subscribe
```

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@@ -0,0 +1,335 @@
---
id: MutationObserver
title: MutationObserver
---
Defined in: [packages/query-core/src/mutationObserver.ts:38](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L38)
Observes a single mutation and derives a `MutationObserverResult` from it.
A framework hook like `useMutation` creates one `MutationObserver` per hook
call, keeps it stable across re-renders, calls `setOptions` when the options
passed to the hook change, subscribes to it to re-render on updates, and
reads `getCurrentResult()` for the value to return. Calling `mutate()`
builds a new underlying `Mutation` in the `MutationCache` and executes it.
## Example
```ts
const observer = new MutationObserver(queryClient, {
mutationFn: (variables: { title: string }) => addPost(variables),
})
```
## Extends
- `Subscribable`\<`MutationObserverListener`\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TVariables
`TVariables` = `void`
### TOnMutateResult
`TOnMutateResult` = `unknown`
## Constructors
### Constructor
```ts
new MutationObserver<TData, TError, TVariables, TOnMutateResult>(client, options): MutationObserver<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/query-core/src/mutationObserver.ts:58](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L58)
#### Parameters
##### client
`QueryClient`
##### options
[`MutationObserverOptions`](../interfaces/MutationObserverOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
#### Returns
`MutationObserver`\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
#### Overrides
```ts
Subscribable<
MutationObserverListener<TData, TError, TVariables, TOnMutateResult>
>.constructor
```
## Properties
### listeners
```ts
protected listeners: Set<MutationObserverListener<TData, TError, TVariables, TOnMutateResult>>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
```ts
Subscribable.listeners
```
***
### options
```ts
options: MutationObserverOptions<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/query-core/src/mutationObserver.ts:46](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L46)
## Methods
### bindMethods()
```ts
protected bindMethods(): void;
```
Defined in: [packages/query-core/src/mutationObserver.ts:75](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L75)
#### Returns
`void`
***
### getCurrentResult()
```ts
getCurrentResult(): MutationObserverResult<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/query-core/src/mutationObserver.ts:155](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L155)
Returns the observer's current result, derived from the observed
mutation's state (or the default, `idle` state if no mutation has been
built yet, e.g. before the first `mutate()` call or after `reset()`).
#### Returns
[`MutationObserverResult`](../type-aliases/MutationObserverResult.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
***
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
```ts
Subscribable.hasListeners
```
***
### mutate()
```ts
mutate(variables, options?): Promise<TData>;
```
Defined in: [packages/query-core/src/mutationObserver.ts:207](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L207)
Builds a new `Mutation` in the `MutationCache` using the observer's
current options, detaches this observer from any previously observed
mutation, attaches it to the new one, and executes it with the given
variables.
The optional per-call `options` (`onSuccess`/`onError`/`onSettled`) are
invoked once the mutation settles, in addition to any callbacks defined
on the observer's own options.
#### Parameters
##### variables
`TVariables`
##### options?
[`MutateOptions`](../interfaces/MutateOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
#### Returns
`Promise`\<`TData`\>
#### Example
```ts
await observer.mutate(
{ title: 'New post' },
{ onSuccess: (data) => console.log(data) },
)
```
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/mutationObserver.ts:127](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L127)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onSubscribe
```
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/mutationObserver.ts:135](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L135)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onUnsubscribe
```
***
### reset()
```ts
reset(): void;
```
Defined in: [packages/query-core/src/mutationObserver.ts:180](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L180)
Detaches the observer from the mutation it is currently observing (if
any) and resets the observed result back to its default, `idle` state.
This does not cancel an in-flight mutation; the mutation itself keeps
running to completion and its own callbacks still fire, but this
observer stops reflecting its state and a subsequent `mutate()` call
will build a brand new mutation.
#### Returns
`void`
#### Example
```ts
observer.reset()
```
#### See
[MutationObserver#mutate](#mutate)
***
### setOptions()
```ts
setOptions(options): void;
```
Defined in: [packages/query-core/src/mutationObserver.ts:96](https://github.com/TanStack/query/blob/main/packages/query-core/src/mutationObserver.ts#L96)
Updates the observer's options.
If the new `mutationKey` differs from the previous one (and both were
defined), the observer is reset, detaching it from the mutation it was
observing. Otherwise, if the currently observed mutation is still
`pending`, its options are updated in place as well.
#### Parameters
##### options
[`MutationObserverOptions`](../interfaces/MutationObserverOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
#### Returns
`void`
#### Example
```ts
observer.setOptions({
mutationFn: (variables: { title: string }) => addPost(variables),
onSuccess: (data) => console.log(data),
})
```
***
### subscribe()
```ts
subscribe(listener): () => void;
```
Defined in: [packages/query-core/src/subscribable.ts:8](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L8)
#### Parameters
##### listener
`MutationObserverListener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Inherited from
```ts
Subscribable.subscribe
```

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---
id: QueriesObserver
title: QueriesObserver
---
Defined in: [packages/query-core/src/queriesObserver.ts:56](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L56)
A `QueriesObserver` watches an array of queries at once, exposing them as
a single array of `QueryObserverResult`s (or, when a `combine` option is
given, as a combined value derived from that array). It manages one
internal `QueryObserver` per query, and is the primitive that framework
adapters (e.g. `useQueries`) build their hooks on top of.
## Example
```ts
const observer = new QueriesObserver(queryClient, [
{ queryKey: ['post', 1], queryFn: fetchPost },
{ queryKey: ['post', 2], queryFn: fetchPost },
])
const unsubscribe = observer.subscribe((result) => {
console.log(result)
})
```
## Extends
- `Subscribable`\<`QueriesObserverListener`\>
## Type Parameters
### TCombinedResult
`TCombinedResult` = [`QueryObserverResult`](../type-aliases/QueryObserverResult.md)[]
## Constructors
### Constructor
```ts
new QueriesObserver<TCombinedResult>(
client,
queries,
options?): QueriesObserver<TCombinedResult>;
```
Defined in: [packages/query-core/src/queriesObserver.ts:70](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L70)
#### Parameters
##### client
`QueryClient`
##### queries
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`any`, `any`, `any`, `any`, `any`, `never`\>[]
##### options?
[`QueriesObserverOptions`](../interfaces/QueriesObserverOptions.md)\<`TCombinedResult`\>
#### Returns
`QueriesObserver`\<`TCombinedResult`\>
#### Overrides
```ts
Subscribable<QueriesObserverListener>.constructor
```
## Properties
### listeners
```ts
protected listeners: Set<QueriesObserverListener>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
```ts
Subscribable.listeners
```
## Methods
### destroy()
```ts
destroy(): void;
```
Defined in: [packages/query-core/src/queriesObserver.ts:106](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L106)
Stops observing all queries: clears all listeners and destroys every
underlying `QueryObserver` this observer manages.
#### Returns
`void`
***
### getCurrentResult()
```ts
getCurrentResult(): QueryObserverResult[];
```
Defined in: [packages/query-core/src/queriesObserver.ts:210](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L210)
Returns the most recently computed array of `QueryObserverResult`s, one
per observed query, in the same order as the queries passed to the
constructor or `setQueries`.
#### Returns
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)[]
#### Example
```ts
const results = observer.getCurrentResult()
const data = results.map((result) => result.data)
```
***
### getObservers()
```ts
getObservers(): QueryObserver<unknown, Error, unknown, unknown, readonly unknown[]>[];
```
Defined in: [packages/query-core/src/queriesObserver.ts:227](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L227)
Returns the underlying `QueryObserver` instances this observer manages,
in the same order as the queries passed to the constructor or
`setQueries`.
#### Returns
[`QueryObserver`](QueryObserver.md)\<`unknown`, `Error`, `unknown`, `unknown`, readonly `unknown`[]\>[]
***
### getOptimisticResult()
```ts
getOptimisticResult(queries, combine): [QueryObserverResult[], (r?) => TCombinedResult, () => QueryObserverResult[]];
```
Defined in: [packages/query-core/src/queriesObserver.ts:238](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L238)
The `QueriesObserver` counterpart of [QueryObserver#getOptimisticResult](QueryObserver.md#getoptimisticresult) — computes
the result for the given (already-defaulted) queries right now, synchronously. Called by
framework adapters (e.g. `useQueries`) ahead of subscribing, returning a tuple of the raw
per-query results, a function to compute the combined result from them, and a function to
wrap the results for property-access tracking.
#### Parameters
##### queries
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`unknown`, `Error`, `unknown`, `unknown`, readonly `unknown`[], `never`\>[]
##### combine
`CombineFn`\<`TCombinedResult`\> | `undefined`
#### Returns
\[[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)[], (`r?`) => `TCombinedResult`, () => [`QueryObserverResult`](../type-aliases/QueryObserverResult.md)[]\]
***
### getQueries()
```ts
getQueries(): Query<unknown, Error, unknown, readonly unknown[]>[];
```
Defined in: [packages/query-core/src/queriesObserver.ts:218](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L218)
Returns the underlying `Query` instances currently being observed, in
the same order as the queries passed to the constructor or `setQueries`.
#### Returns
[`Query`](Query.md)\<`unknown`, `Error`, `unknown`, readonly `unknown`[]\>[]
***
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
```ts
Subscribable.hasListeners
```
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/queriesObserver.ts:86](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L86)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onSubscribe
```
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/queriesObserver.ts:96](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L96)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onUnsubscribe
```
***
### setQueries()
```ts
setQueries(queries, options?): void;
```
Defined in: [packages/query-core/src/queriesObserver.ts:127](https://github.com/TanStack/query/blob/main/packages/query-core/src/queriesObserver.ts#L127)
Replaces the set of queries being observed. Existing `QueryObserver`s
are reused for queries that match an already-observed query hash;
observers for queries that are no longer present are destroyed, and new
observers are created and subscribed to for newly added queries.
#### Parameters
##### queries
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`unknown`, `Error`, `unknown`, `unknown`, readonly `unknown`[], `never`\>[]
##### options?
[`QueriesObserverOptions`](../interfaces/QueriesObserverOptions.md)\<`TCombinedResult`\>
#### Returns
`void`
#### Example
```ts
observer.setQueries([
{ queryKey: ['post', 1], queryFn: fetchPost },
{ queryKey: ['post', 3], queryFn: fetchPost },
])
```
***
### subscribe()
```ts
subscribe(listener): () => void;
```
Defined in: [packages/query-core/src/subscribable.ts:8](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L8)
#### Parameters
##### listener
`QueriesObserverListener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Inherited from
```ts
Subscribable.subscribe
```

View File

@@ -0,0 +1,585 @@
---
id: Query
title: Query
---
Defined in: [packages/query-core/src/query.ts:225](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L225)
Represents a single cached query. A `Query` holds the query's key, options,
state (data/error/status), and the observers currently subscribed to it.
Instances are created and managed internally by `QueryCache`; application
code typically interacts with queries indirectly through `QueryClient` or
a framework hook like `useQuery`. Direct access to a `Query` instance is
possible via `queryCache.find()`/`findAll()` for inspecting cache state.
## Example
```ts
const queryCache = queryClient.getQueryCache()
const query = queryCache.find({ queryKey: ['posts'] })
if (query) {
console.log(query.state.dataUpdatedAt)
}
```
## Extends
- `Removable`
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TData
`TData` = `TQueryFnData`
### TQueryKey
`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
## Constructors
### Constructor
```ts
new Query<TQueryFnData, TError, TData, TQueryKey>(config): Query<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/query-core/src/query.ts:246](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L246)
#### Parameters
##### config
`QueryConfig`\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
#### Returns
`Query`\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
#### Overrides
```ts
Removable.constructor
```
## Properties
### gcTime
```ts
gcTime: number;
```
Defined in: [packages/query-core/src/removable.ts:7](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L7)
#### Inherited from
```ts
Removable.gcTime
```
***
### observers
```ts
observers: QueryObserver<any, any, any, any, any>[];
```
Defined in: [packages/query-core/src/query.ts:242](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L242)
***
### options
```ts
options: QueryOptions<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/query-core/src/query.ts:233](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L233)
***
### queryHash
```ts
queryHash: string;
```
Defined in: [packages/query-core/src/query.ts:232](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L232)
***
### queryKey
```ts
queryKey: TQueryKey;
```
Defined in: [packages/query-core/src/query.ts:231](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L231)
***
### state
```ts
state: QueryState<TData, TError>;
```
Defined in: [packages/query-core/src/query.ts:234](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L234)
## Accessors
### meta
#### Get Signature
```ts
get meta(): Record<string, unknown> | undefined;
```
Defined in: [packages/query-core/src/query.ts:264](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L264)
The `meta` object passed in the query's options, if any.
##### Returns
`Record`\<`string`, `unknown`\> \| `undefined`
***
### promise
#### Get Signature
```ts
get promise(): Promise<TData> | undefined;
```
Defined in: [packages/query-core/src/query.ts:277](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L277)
The promise for the currently in-flight fetch, if the query is fetching.
`undefined` when the query is not fetching.
##### Returns
`Promise`\<`TData`\> \| `undefined`
## Methods
### cancel()
```ts
cancel(options?): Promise<void>;
```
Defined in: [packages/query-core/src/query.ts:348](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L348)
Cancels the query's currently in-flight fetch, if any.
- Returns a promise that resolves once the cancellation has settled.
- If no fetch is in progress, resolves immediately.
#### Parameters
##### options?
[`CancelOptions`](../interfaces/CancelOptions.md)
#### Returns
`Promise`\<`void`\>
#### Example
```ts
await query.cancel()
```
***
### clearGcTimeout()
```ts
protected clearGcTimeout(): void;
```
Defined in: [packages/query-core/src/removable.ts:32](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L32)
#### Returns
`void`
#### Inherited from
```ts
Removable.clearGcTimeout
```
***
### destroy()
```ts
destroy(): void;
```
Defined in: [packages/query-core/src/query.ts:361](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L361)
Clears the query's garbage collection timeout and silently cancels any
in-flight fetch. Called by `QueryCache` when the query is removed from
the cache.
#### Returns
`void`
#### See
[Query#cancel](#cancel)
#### Overrides
```ts
Removable.destroy
```
***
### fetch()
```ts
fetch(options?, fetchOptions?): Promise<TData>;
```
Defined in: [packages/query-core/src/query.ts:590](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L590)
Fetches the query, i.e. runs its `queryFn` (through any configured
retryer/behavior) and updates the query's state with the result.
- If a fetch is already in flight, returns its promise instead of
starting a new one, unless `fetchOptions.cancelRefetch` is set and the
query already has data, in which case the current fetch is silently
cancelled first.
- If `options` is passed, it replaces the query's current options
before fetching.
#### Parameters
##### options?
`QueryOptions`\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `never`\>
##### fetchOptions?
`FetchOptions`\<`TQueryFnData`\>
#### Returns
`Promise`\<`TData`\>
***
### getObserversCount()
```ts
getObserversCount(): number;
```
Defined in: [packages/query-core/src/query.ts:560](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L560)
Returns the number of observers currently subscribed to this query.
#### Returns
`number`
#### Example
```ts
if (query.getObserversCount() === 0) {
// no component is currently watching this query
}
```
***
### invalidate()
```ts
invalidate(): void;
```
Defined in: [packages/query-core/src/query.ts:574](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L574)
Marks the query as invalidated, unless it is already invalidated. This
updates `state.isInvalidated` and notifies observers, but does not by
itself trigger a refetch.
#### Returns
`void`
#### Example
```ts
query.invalidate()
```
***
### isActive()
```ts
isActive(): boolean;
```
Defined in: [packages/query-core/src/query.ts:386](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L386)
Returns `true` if the query has at least one observer for which `enabled`
does not resolve to `false`.
#### Returns
`boolean`
***
### isDisabled()
```ts
isDisabled(): boolean;
```
Defined in: [packages/query-core/src/query.ts:400](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L400)
Returns `true` if the query is disabled, meaning it will not fetch
automatically.
- If the query has observers, it is disabled when none of them are active
(see `isActive`).
- If the query has no observers, it is disabled when its `queryFn` is
`skipToken` or it has never been fetched.
#### Returns
`boolean`
***
### isFetched()
```ts
isFetched(): boolean;
```
Defined in: [packages/query-core/src/query.ts:412](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L412)
Returns `true` if the query has been fetched, i.e. it has resolved with
either data or an error at least once.
#### Returns
`boolean`
***
### isStale()
```ts
isStale(): boolean;
```
Defined in: [packages/query-core/src/query.ts:447](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L447)
Returns `true` if the query is stale.
- If the query has observers, defers to whether any observer's current
result reports `isStale` (which accounts for each observer's own
`staleTime` and `enabled` state).
- If the query has no observers, it is considered stale when it has no
data or has been invalidated.
#### Returns
`boolean`
#### See
[Query#isStaleByTime](#isstalebytime)
#### Example
```ts
if (query.isStale()) {
// refetch or otherwise treat the cached data as outdated
}
```
***
### isStaleByTime()
```ts
isStaleByTime(staleTime): boolean;
```
Defined in: [packages/query-core/src/query.ts:473](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L473)
Returns `true` if the query's data is stale relative to the given
`staleTime` (defaults to `0`).
- A query with no data is always stale.
- `staleTime: 'static'` is never stale.
- An invalidated query is always stale.
- Otherwise, staleness is based on elapsed time since `dataUpdatedAt`.
#### Parameters
##### staleTime
[`StaleTime`](../type-aliases/StaleTime.md) = `0`
#### Returns
`boolean`
#### See
[Query#isStale](#isstale)
#### Example
```ts
const isStale = query.isStaleByTime(1000 * 60)
```
***
### isStatic()
```ts
isStatic(): boolean;
```
Defined in: [packages/query-core/src/query.ts:420](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L420)
Returns `true` if the query has at least one observer configured with
`staleTime: 'static'`, meaning it is treated as never stale.
#### Returns
`boolean`
***
### optionalRemove()
```ts
protected optionalRemove(): void;
```
Defined in: [packages/query-core/src/query.ts:305](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L305)
#### Returns
`void`
#### Overrides
```ts
Removable.optionalRemove
```
***
### reset()
```ts
reset(): void;
```
Defined in: [packages/query-core/src/query.ts:377](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L377)
Resets the query back to its initial state (the state it had when it was
first created, e.g. any `initialData`), destroying it first to cancel any
in-flight fetch.
#### Returns
`void`
***
### scheduleGc()
```ts
protected scheduleGc(): void;
```
Defined in: [packages/query-core/src/removable.ts:14](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L14)
#### Returns
`void`
#### Inherited from
```ts
Removable.scheduleGc
```
***
### setState()
```ts
setState(state): void;
```
Defined in: [packages/query-core/src/query.ts:334](https://github.com/TanStack/query/blob/main/packages/query-core/src/query.ts#L334)
Merges the given partial state directly into this query's state, notifying observers. Used
by persistence and broadcast plugins to restore a state snapshot, and by devtools to let a
user manually trigger a loading/error state or edit the cached data.
#### Parameters
##### state
`Partial`\<[`QueryState`](../interfaces/QueryState.md)\<`TData`, `TError`\>\>
#### Returns
`void`
***
### updateGcTime()
```ts
protected updateGcTime(newGcTime): void;
```
Defined in: [packages/query-core/src/removable.ts:24](https://github.com/TanStack/query/blob/main/packages/query-core/src/removable.ts#L24)
#### Parameters
##### newGcTime
`number` | `undefined`
#### Returns
`void`
#### Inherited from
```ts
Removable.updateGcTime
```

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---
id: QueryCache
title: QueryCache
---
Defined in: [packages/vue-query/src/queryCache.ts:16](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryCache.ts#L16)
Vue-aware subclass of `@tanstack/query-core`'s `QueryCache`. `find`/`findAll` also accept a
MaybeRefDeep filters object, so `ref`s can be passed directly without unwrapping. Access it via
`queryClient.getQueryCache()` — `QueryClient` constructs one of these by default.
## Extends
- `QueryCache`
## Constructors
### Constructor
```ts
new QueryCache(config): QueryCache;
```
Defined in: [packages/query-core/src/queryCache.ts:126](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L126)
#### Parameters
##### config
[`QueryCacheConfig`](../interfaces/QueryCacheConfig.md) = `{}`
#### Returns
`QueryCache`
#### Inherited from
```ts
QC.constructor
```
## Properties
### config
```ts
config: QueryCacheConfig = {};
```
Defined in: [packages/query-core/src/queryCache.ts:126](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L126)
#### Inherited from
```ts
QC.config
```
***
### listeners
```ts
protected listeners: Set<QueryCacheListener>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
```ts
QC.listeners
```
## Methods
### build()
```ts
build<TQueryFnData, TError, TData, TQueryKey>(
client,
options,
state?): Query<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/query-core/src/queryCache.ts:147](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L147)
Returns the existing `Query` instance for the given options' `queryKey`/`queryHash`, or
builds and adds a new one to the cache if none exists yet. Used by framework adapters and
plugins (e.g. broadcast/persistence) that need to get-or-create a `Query` directly, bypassing
the reactive `QueryObserver` machinery.
#### Type Parameters
##### TQueryFnData
`TQueryFnData` = `unknown`
##### TError
`TError` = `Error`
##### TData
`TData` = `TQueryFnData`
##### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### Parameters
##### client
`QueryClient`
##### options
[`WithRequired`](../type-aliases/WithRequired.md)\<`QueryOptions`\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `never`\>, `"queryKey"`\>
##### state?
[`QueryState`](../interfaces/QueryState.md)\<`TData`, `TError`\>
#### Returns
[`Query`](Query.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
#### Example
```ts
const queryCache = queryClient.getQueryCache()
const query = queryCache.build(queryClient, {
queryKey: ['posts'],
queryFn: fetchPosts,
})
```
#### Inherited from
```ts
QC.build
```
***
### clear()
```ts
clear(): void;
```
Defined in: [packages/query-core/src/queryCache.ts:232](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L232)
Removes all queries from the cache.
#### Returns
`void`
#### Example
```ts
const queryCache = queryClient.getQueryCache()
queryCache.clear()
```
#### Inherited from
```ts
QC.clear
```
***
### find()
```ts
find<TQueryFnData, TError, TData>(filters):
| Query<TQueryFnData, TError, TData, readonly unknown[]>
| undefined;
```
Defined in: [packages/vue-query/src/queryCache.ts:17](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryCache.ts#L17)
A slightly more advanced method that can be used to get an existing query instance from the
cache. This instance not only contains all the state for the query, but all of the instances,
and underlying guts of the query as well. If the query does not exist, `undefined` is
returned.
This is not typically needed for most applications, but can come in handy when needing more
information about a query in rare scenarios (e.g. looking at `query.state.dataUpdatedAt` to
decide whether a query is fresh enough to be used as an initial value).
#### Type Parameters
##### TQueryFnData
`TQueryFnData` = `unknown`
##### TError
`TError` = `Error`
##### TData
`TData` = `TQueryFnData`
#### Parameters
##### filters
`MaybeRefDeep`\<[`WithRequired`](../type-aliases/WithRequired.md)\<[`QueryFilters`](../interfaces/QueryFilters.md)\<readonly `unknown`[]\>, `"queryKey"`\>\>
#### Returns
\| [`Query`](Query.md)\<`TQueryFnData`, `TError`, `TData`, readonly `unknown`[]\>
\| `undefined`
#### See
[QueryCache#findAll](#findall)
#### Example
```ts
const queryCache = queryClient.getQueryCache()
const query = queryCache.find({ queryKey: ['posts'] })
```
#### Overrides
```ts
QC.find
```
***
### findAll()
```ts
findAll(filters): Query<unknown, Error, unknown, readonly unknown[]>[];
```
Defined in: [packages/vue-query/src/queryCache.ts:23](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryCache.ts#L23)
An even more advanced method that can be used to get existing query instances from the cache
that partially match a query key. If no queries match, an empty array is returned.
This is not typically needed for most applications, but can come in handy when needing more
information about queries in rare scenarios.
#### Parameters
##### filters
`MaybeRefDeep`\<[`QueryFilters`](../interfaces/QueryFilters.md)\<readonly `unknown`[]\>\> = `{}`
#### Returns
[`Query`](Query.md)\<`unknown`, `Error`, `unknown`, readonly `unknown`[]\>[]
#### See
[QueryCache#find](#find)
#### Example
```ts
const queryCache = queryClient.getQueryCache()
const queries = queryCache.findAll({ queryKey: ['posts'] })
```
#### Overrides
```ts
QC.findAll
```
***
### get()
```ts
get<TQueryFnData, TError, TData, TQueryKey>(queryHash):
| Query<TQueryFnData, TError, TData, TQueryKey>
| undefined;
```
Defined in: [packages/query-core/src/queryCache.ts:254](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L254)
Returns the `Query` instance stored under the given `queryHash`, or `undefined` if none
exists. Unlike [QueryCache#find](#find), this looks up by the already-computed hash rather
than by `QueryFilters`. Used by plugins (e.g. broadcast/hydration) that already have a hash
to look up directly.
#### Type Parameters
##### TQueryFnData
`TQueryFnData` = `unknown`
##### TError
`TError` = `Error`
##### TData
`TData` = `TQueryFnData`
##### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### Parameters
##### queryHash
`string`
#### Returns
\| [`Query`](Query.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
\| `undefined`
#### Example
```ts
const queryCache = queryClient.getQueryCache()
const queryHash = hashKey(['posts'])
const query = queryCache.get(queryHash)
```
#### Inherited from
```ts
QC.get
```
***
### getAll()
```ts
getAll(): Query<unknown, Error, unknown, readonly unknown[]>[];
```
Defined in: [packages/query-core/src/queryCache.ts:277](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L277)
Returns all queries within the cache.
#### Returns
[`Query`](Query.md)\<`unknown`, `Error`, `unknown`, readonly `unknown`[]\>[]
#### Example
```ts
const queryCache = queryClient.getQueryCache()
const queries = queryCache.getAll()
```
#### Inherited from
```ts
QC.getAll
```
***
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
```ts
QC.hasListeners
```
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/subscribable.ts:23](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L23)
#### Returns
`void`
#### Inherited from
```ts
QC.onSubscribe
```
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/subscribable.ts:27](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L27)
#### Returns
`void`
#### Inherited from
```ts
QC.onUnsubscribe
```
***
### remove()
```ts
remove(query): void;
```
Defined in: [packages/query-core/src/queryCache.ts:208](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryCache.ts#L208)
Destroys the given `Query` and removes it from the cache, notifying subscribers with a
`'removed'` event. A no-op if the query is no longer the one currently stored under its hash
(e.g. it was already replaced). Used by plugins (e.g. the broadcast client) that mirror
removals across `QueryCache` instances.
#### Parameters
##### query
[`Query`](Query.md)\<`any`, `any`, `any`, `any`\>
#### Returns
`void`
#### Example
```ts
const queryCache = queryClient.getQueryCache()
const query = queryCache.find({ queryKey: ['posts'] })
if (query) {
queryCache.remove(query)
}
```
#### Inherited from
```ts
QC.remove
```
***
### subscribe()
```ts
subscribe(listener): () => void;
```
Defined in: [packages/query-core/src/subscribable.ts:8](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L8)
#### Parameters
##### listener
`QueryCacheListener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Inherited from
```ts
QC.subscribe
```

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---
id: QueryObserver
title: QueryObserver
---
Defined in: [packages/query-core/src/queryObserver.ts:57](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L57)
A `QueryObserver` watches a single query in the `QueryCache` and computes a
`QueryObserverResult` from its state, recomputing and notifying subscribers
whenever the underlying query (or the observer's options) changes. It is
the primitive that framework adapters (e.g. `useQuery`) build their hooks
on top of, but it can also be used directly to observe and switch between
queries outside of any framework.
## Example
```ts
const observer = new QueryObserver(queryClient, {
queryKey: ['posts'],
queryFn: fetchPosts,
})
const unsubscribe = observer.subscribe((result) => {
console.log(result.data)
})
```
## Extends
- `Subscribable`\<`QueryObserverListener`\<`TData`, `TError`\>\>
## Extended by
- [`InfiniteQueryObserver`](InfiniteQueryObserver.md)
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TData
`TData` = `TQueryFnData`
### TQueryData
`TQueryData` = `TQueryFnData`
### TQueryKey
`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
## Constructors
### Constructor
```ts
new QueryObserver<TQueryFnData, TError, TData, TQueryData, TQueryKey>(client, options): QueryObserver<TQueryFnData, TError, TData, TQueryData, TQueryKey>;
```
Defined in: [packages/query-core/src/queryObserver.ts:87](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L87)
#### Parameters
##### client
`QueryClient`
##### options
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>
#### Returns
`QueryObserver`\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>
#### Overrides
```ts
Subscribable<QueryObserverListener<TData, TError>>.constructor
```
## Properties
### listeners
```ts
protected listeners: Set<QueryObserverListener<TData, TError>>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
```ts
Subscribable.listeners
```
***
### options
```ts
options: QueryObserverOptions<TQueryFnData, TError, TData, TQueryData, TQueryKey>;
```
Defined in: [packages/query-core/src/queryObserver.ts:89](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L89)
## Methods
### bindMethods()
```ts
protected bindMethods(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:106](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L106)
#### Returns
`void`
***
### createResult()
```ts
protected createResult(query, options): QueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/queryObserver.ts:559](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L559)
#### Parameters
##### query
[`Query`](Query.md)\<`TQueryFnData`, `TError`, `TQueryData`, `TQueryKey`\>
##### options
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>
#### Returns
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
***
### destroy()
```ts
destroy(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:161](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L161)
Stops observing the current query: clears all listeners, cancels the
stale and refetch-interval timers, and removes this observer from the
query it was observing.
#### Returns
`void`
***
### fetch()
```ts
protected fetch(fetchOptions): Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/queryObserver.ts:448](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L448)
#### Parameters
##### fetchOptions
`ObserverFetchOptions`
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
***
### fetchOptimistic()
```ts
fetchOptimistic(options): Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/queryObserver.ts:395](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L395)
Fetches a query defined by the given options without affecting this
observer's own tracked query or result, and returns a promise that
resolves with the `QueryObserverResult` for that fetch. This is useful
for prefetching data that another observer (e.g. a query about to be
navigated to) will need, ahead of time.
#### Parameters
##### options
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Example
```ts
const result = await observer.fetchOptimistic({
queryKey: ['posts', 2],
queryFn: () => fetchPost(2),
})
console.log(result.data)
```
***
### getCurrentQuery()
```ts
getCurrentQuery(): Query<TQueryFnData, TError, TQueryData, TQueryKey>;
```
Defined in: [packages/query-core/src/queryObserver.ts:357](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L357)
Returns the `Query` instance this observer is currently observing.
#### Returns
[`Query`](Query.md)\<`TQueryFnData`, `TError`, `TQueryData`, `TQueryKey`\>
***
### getCurrentResult()
```ts
getCurrentResult(): QueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/queryObserver.ts:321](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L321)
Returns the most recently computed `QueryObserverResult` for the
observed query. This is a point-in-time read; to be notified of updates
as they happen, subscribe to the observer instead (its inherited
`subscribe` method).
#### Returns
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
#### Example
```ts
const result = observer.getCurrentResult()
console.log(result.status, result.data)
```
***
### getOptimisticResult()
```ts
getOptimisticResult(options): QueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/queryObserver.ts:272](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L272)
Computes the result the observer would produce for the given (already-defaulted) options
right now, building the underlying `Query` if it doesn't exist yet, without waiting for a
subscription callback. Called by framework adapters on every render (e.g. `useQuery`) so the
returned value is available synchronously, ahead of `setOptions` triggering an actual fetch.
#### Parameters
##### options
[`DefaultedQueryObserverOptions`](../type-aliases/DefaultedQueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>
#### Returns
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
***
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
```ts
Subscribable.hasListeners
```
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:110](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L110)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onSubscribe
```
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:124](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L124)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onUnsubscribe
```
***
### refetch()
```ts
refetch(__namedParameters): Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/queryObserver.ts:371](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L371)
Refetches the observed query and returns a promise that resolves with
the resulting `QueryObserverResult`.
#### Parameters
##### \_\_namedParameters
[`RefetchOptions`](../interfaces/RefetchOptions.md) = `{}`
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Example
```ts
const result = await observer.refetch({ cancelRefetch: false })
console.log(result.data)
```
***
### setOptions()
```ts
setOptions(options): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:182](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L182)
Updates the observer's options. This will re-resolve the query being
observed (switching to a different query if the `queryKey` changed),
trigger a fetch if the new options require one and the observer has
subscribers, recompute the current result, and reschedule the stale and
refetch-interval timers as needed.
#### Parameters
##### options
[`QueryObserverOptions`](../interfaces/QueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>
#### Returns
`void`
#### Example
```ts
observer.setOptions({ queryKey: ['posts', 1], queryFn: () => fetchPost(1) })
// later: switch to a different query, reusing the same observer
observer.setOptions({ queryKey: ['posts', 2], queryFn: () => fetchPost(2) })
```
***
### shouldFetchOnReconnect()
```ts
shouldFetchOnReconnect(): boolean;
```
Defined in: [packages/query-core/src/queryObserver.ts:135](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L135)
Returns whether the observed query is currently stale and configured
(via the `refetchOnReconnect` option) to refetch when the network
reconnects.
#### Returns
`boolean`
***
### shouldFetchOnWindowFocus()
```ts
shouldFetchOnWindowFocus(): boolean;
```
Defined in: [packages/query-core/src/queryObserver.ts:148](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L148)
Returns whether the observed query is currently stale and configured
(via the `refetchOnWindowFocus` option) to refetch when the window
regains focus.
#### Returns
`boolean`
***
### subscribe()
```ts
subscribe(listener): () => void;
```
Defined in: [packages/query-core/src/subscribable.ts:8](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L8)
#### Parameters
##### listener
`QueryObserverListener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Inherited from
```ts
Subscribable.subscribe
```
***
### trackProp()
```ts
trackProp(key): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:350](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L350)
Records that the given `QueryObserverResult` property was read, so a subsequent update only
notifies this observer if a tracked property actually changed. Normally called indirectly via
[QueryObserver#trackResult](#trackresult)'s proxy; exposed directly for adapters that track property
access themselves (e.g. through their own reactivity system) instead of via the proxy.
#### Parameters
##### key
`"error"` | `"data"` | `"isError"` | `"isPending"` | `"isLoading"` | `"isLoadingError"` | `"isRefetchError"` | `"isSuccess"` | `"isPlaceholderData"` | `"status"` | `"dataUpdatedAt"` | `"errorUpdatedAt"` | `"failureCount"` | `"failureReason"` | `"errorUpdateCount"` | `"isFetched"` | `"isFetchedAfterMount"` | `"isFetching"` | `"isInitialLoading"` | `"isPaused"` | `"isRefetching"` | `"isStale"` | `"isEnabled"` | `"refetch"` | `"fetchStatus"`
#### Returns
`void`
***
### trackResult()
```ts
trackResult(result, onPropTracked?): QueryObserverResult<TData, TError>;
```
Defined in: [packages/query-core/src/queryObserver.ts:331](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L331)
Wraps a `QueryObserverResult` in a `Proxy` that records which properties are read, via
[QueryObserver#trackProp](#trackprop) (and an optional `onPropTracked` callback). Used by framework
adapters when `notifyOnChangeProps` is not set, to implement its default "only re-render on
properties you actually read" behavior.
#### Parameters
##### result
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
##### onPropTracked?
(`key`) => `void`
#### Returns
[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>
***
### updateResult()
```ts
updateResult(): void;
```
Defined in: [packages/query-core/src/queryObserver.ts:735](https://github.com/TanStack/query/blob/main/packages/query-core/src/queryObserver.ts#L735)
Recomputes and stores the current result from the current query/options, notifying listeners
if it changed. Framework adapters call this right after subscribing to make sure no query
update was missed in the gap between creating the observer and subscribing to it.
#### Returns
`void`

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---
id: defaultShouldDehydrateMutation
title: defaultShouldDehydrateMutation
---
```ts
function defaultShouldDehydrateMutation(mutation): boolean;
```
Defined in: [packages/query-core/src/hydration.ts:177](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L177)
The default `shouldDehydrateMutation` predicate used by `dehydrate`. Only dehydrates mutations that are
currently paused (e.g. paused by `networkMode` while offline).
## Parameters
### mutation
[`Mutation`](../classes/Mutation.md)
## Returns
`boolean`

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---
id: defaultShouldDehydrateQuery
title: defaultShouldDehydrateQuery
---
```ts
function defaultShouldDehydrateQuery(query): boolean;
```
Defined in: [packages/query-core/src/hydration.ts:185](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L185)
The default `shouldDehydrateQuery` predicate used by `dehydrate`. Only dehydrates queries whose status is
`'success'`.
## Parameters
### query
[`Query`](../classes/Query.md)
## Returns
`boolean`

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---
id: dehydrate
title: dehydrate
---
```ts
function dehydrate(client, options): DehydratedState;
```
Defined in: [packages/query-core/src/hydration.ts:207](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L207)
Dehydrates a `QueryClient`'s cache (queries and mutations) into a plain, serializable `DehydratedState`,
typically to embed in server-rendered markup and later restore into a client-side `QueryClient` via `hydrate`.
Which queries/mutations are included, and how their data/errors are transformed, is controlled by `options`,
falling back to the client's `dehydrate` default options, and finally to `defaultShouldDehydrateQuery` /
`defaultShouldDehydrateMutation`.
## Parameters
### client
`QueryClient`
### options
[`DehydrateOptions`](../interfaces/DehydrateOptions.md) = `{}`
## Returns
[`DehydratedState`](../interfaces/DehydratedState.md)
## Example
```ts
const queryClient = new QueryClient()
await queryClient.prefetchQuery({
queryKey: ['posts'],
queryFn: getPosts,
})
const dehydratedState = dehydrate(queryClient)
```

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@@ -0,0 +1,43 @@
---
id: dehydrateQuery
title: dehydrateQuery
---
```ts
function dehydrateQuery(
query,
serializeData?,
shouldRedactErrors?): DehydratedQuery;
```
Defined in: [packages/query-core/src/hydration.ts:148](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L148)
Dehydrates a single `Query` into a serializable `DehydratedQuery` snapshot. Note that most query config (e.g.
`queryFn`, `staleTime`) is not dehydrated but instead meant to be configured again when consuming the
de/rehydrated data, typically with `useQuery` on the client. If the query is still `pending`, its in-flight
promise is dehydrated too so it can be resumed on the other side instead of re-fetched.
## Parameters
### query
[`Query`](../classes/Query.md)
The query to dehydrate.
### serializeData?
`TransformerFn`
Optional transform applied to `query.state.data` before it is included in the snapshot.
### shouldRedactErrors?
(`error`) => `boolean`
Optional predicate; if it returns `false` for the promise's rejection error, that
error is kept as-is instead of being redacted.
## Returns
`DehydratedQuery`

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@@ -0,0 +1,52 @@
---
id: experimental_streamedQuery
title: experimental_streamedQuery
---
```ts
function experimental_streamedQuery<TQueryFnData, TData, TQueryKey>(streamFn): QueryFunction<TData, TQueryKey>;
```
Defined in: [packages/query-core/src/streamedQuery.ts:75](https://github.com/TanStack/query/blob/main/packages/query-core/src/streamedQuery.ts#L75)
This is a helper function to create a query function that streams data from an AsyncIterable.
Data will be an Array of all the chunks received.
The query will be in a 'pending' state until the first chunk of data is received, but will go to 'success' after that.
The query will stay in fetchStatus 'fetching' until the stream ends.
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TData
`TData` = `TQueryFnData`[]
### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
## Parameters
### streamFn
`StreamedQueryParams`\<`TQueryFnData`, `TData`, `TQueryKey`\>
The function that returns an AsyncIterable to stream data from.
## Returns
[`QueryFunction`](../type-aliases/QueryFunction.md)\<`TData`, `TQueryKey`\>
## Example
```ts
await queryClient.query({
queryKey: ['data'],
queryFn: streamedQuery({
streamFn: fetchDataInChunks,
}),
})
```

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@@ -0,0 +1,30 @@
---
id: hashKey
title: hashKey
---
```ts
function hashKey(queryKey): string;
```
Defined in: [packages/query-core/src/utils.ts:284](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L284)
Default query & mutation keys hash function.
Hashes the value into a stable hash.
## Parameters
### queryKey
readonly `unknown`[]
## Returns
`string`
## Example
```ts
// Object keys are sorted, so key order doesn't affect the hash:
hashKey(['todos', { page: 1, filter: 'done' }]) // === '["todos",{"filter":"done","page":1}]'
```

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@@ -0,0 +1,49 @@
---
id: hydrate
title: hydrate
---
```ts
function hydrate(
client,
dehydratedState,
options?): void;
```
Defined in: [packages/query-core/src/hydration.ts:264](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L264)
Restores a `DehydratedState` (as produced by `dehydrate`) into a `QueryClient`'s cache, typically to seed the
client with data already fetched on the server. `mutations` and `queries` are each optional on `dehydratedState`.
Queries not yet in the cache are built from the dehydrated snapshot; queries that already exist are only updated
when the dehydrated data is newer than what's already cached. Newly built queries have their `fetchStatus` reset
to `'idle'` so they don't hydrate stuck in a fetching state. If a dehydrated query still had an in-flight
promise, it is resumed via `query.fetch()` (reusing that promise as `initialPromise`) rather than re-invoking
`queryFn`.
## Parameters
### client
`QueryClient`
### dehydratedState
`Partial`\<[`DehydratedState`](../interfaces/DehydratedState.md)\>
### options?
[`HydrateOptions`](../interfaces/HydrateOptions.md)
## Returns
`void`
## Example
```ts
// dehydratedState was produced by `dehydrate` on the server
// and sent to the client, e.g. embedded in server-rendered markup.
const queryClient = new QueryClient()
hydrate(queryClient, dehydratedState)
```

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@@ -0,0 +1,149 @@
---
id: infiniteQueryOptions
title: infiniteQueryOptions
---
## Call Signature
```ts
function infiniteQueryOptions<TQueryFnData, TError, TData, TQueryKey, TPageParam>(options): UndefinedInitialDataInfiniteOptions<TQueryFnData, TError, TData, TQueryKey, TPageParam> & QueryKeyWithDataTag<TQueryKey, InfiniteData<TQueryFnData, unknown>, TError>;
```
Defined in: [packages/vue-query/src/infiniteQueryOptions.ts:99](https://github.com/TanStack/query/blob/main/packages/vue-query/src/infiniteQueryOptions.ts#L99)
You can generally pass everything to `infiniteQueryOptions` that you can also pass to `useInfiniteQuery`.
These options can be shared across hooks and imperative APIs such as `queryClient.infiniteQuery`.
`options.queryKey` is required and is the query key to generate options for.
### Type Parameters
#### TQueryFnData
`TQueryFnData`
#### TError
`TError` = `Error`
#### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### TPageParam
`TPageParam` = `unknown`
### Parameters
#### options
[`UndefinedInitialDataInfiniteOptions`](../type-aliases/UndefinedInitialDataInfiniteOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
The [UndefinedInitialDataInfiniteOptions](../type-aliases/UndefinedInitialDataInfiniteOptions.md) to use — everything you can pass to
`useInfiniteQuery`.
### Returns
[`UndefinedInitialDataInfiniteOptions`](../type-aliases/UndefinedInitialDataInfiniteOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\> & [`QueryKeyWithDataTag`](../type-aliases/QueryKeyWithDataTag.md)\<`TQueryKey`, [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>, `TError`\>
The same options object, typed so that `queryKey` carries the inferred data type.
### See
[useInfiniteQuery](useInfiniteQuery.md) to run an infinite query with these options.
### Example
```vue
<script setup lang="ts">
import { infiniteQueryOptions, useInfiniteQuery } from '@tanstack/vue-query'
const projectsOptions = infiniteQueryOptions({
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
})
const { data, isError, error, fetchNextPage } = useInfiniteQuery(projectsOptions)
</script>
```
## Call Signature
```ts
function infiniteQueryOptions<TQueryFnData, TError, TData, TQueryKey, TPageParam>(options): DefinedInitialDataInfiniteOptions<TQueryFnData, TError, TData, TQueryKey, TPageParam> & QueryKeyWithDataTag<TQueryKey, InfiniteData<TQueryFnData, unknown>, TError>;
```
Defined in: [packages/vue-query/src/infiniteQueryOptions.ts:153](https://github.com/TanStack/query/blob/main/packages/vue-query/src/infiniteQueryOptions.ts#L153)
You can generally pass everything to `infiniteQueryOptions` that you can also pass to `useInfiniteQuery`.
These options can be shared across hooks and imperative APIs such as `queryClient.infiniteQuery`.
`options.queryKey` is required and is the query key to generate options for.
This overload is selected when `initialData` is set, so the resulting `data` is never `undefined`.
### Type Parameters
#### TQueryFnData
`TQueryFnData`
#### TError
`TError` = `Error`
#### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### TPageParam
`TPageParam` = `unknown`
### Parameters
#### options
[`DefinedInitialDataInfiniteOptions`](../type-aliases/DefinedInitialDataInfiniteOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
The [DefinedInitialDataInfiniteOptions](../type-aliases/DefinedInitialDataInfiniteOptions.md) to use — everything you can pass to
`useInfiniteQuery`, with `initialData` set.
### Returns
[`DefinedInitialDataInfiniteOptions`](../type-aliases/DefinedInitialDataInfiniteOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\> & [`QueryKeyWithDataTag`](../type-aliases/QueryKeyWithDataTag.md)\<`TQueryKey`, [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>, `TError`\>
The same options object, typed so that `queryKey` carries the inferred data type.
### See
[useInfiniteQuery](useInfiniteQuery.md) to run an infinite query with these options.
### Example
```vue
<script setup lang="ts">
import { infiniteQueryOptions, useInfiniteQuery } from '@tanstack/vue-query'
const projectsOptions = infiniteQueryOptions({
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
initialData: { pages: [], pageParams: [] },
})
// `data` is never `undefined`, thanks to `initialData` — even if a refetch fails, so the
// list stays visible alongside the error.
const { data, isError, error } = useInfiniteQuery(projectsOptions)
</script>
```

View File

@@ -0,0 +1,24 @@
---
id: isCancelledError
title: isCancelledError
---
```ts
function isCancelledError(value): value is CancelledError;
```
Defined in: [packages/query-core/src/retryer.ts:90](https://github.com/TanStack/query/blob/main/packages/query-core/src/retryer.ts#L90)
## Parameters
### value
`any`
## Returns
`value is CancelledError`
## Deprecated
Use instanceof `CancelledError` instead.

View File

@@ -0,0 +1,40 @@
---
id: keepPreviousData
title: keepPreviousData
---
```ts
function keepPreviousData<T>(previousData): T | undefined;
```
Defined in: [packages/query-core/src/utils.ts:493](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L493)
Intended to be passed as a query's `placeholderData` option, for example
`placeholderData: keepPreviousData`. Instead of resetting the query's data to `undefined` while a new
query key is fetching, it keeps displaying the previously fetched data until the new data arrives.
## Type Parameters
### T
`T`
## Parameters
### previousData
`T` | `undefined`
## Returns
`T` \| `undefined`
## Example
```ts
new QueryObserver(queryClient, {
queryKey: ['posts', page],
queryFn: () => fetchPosts(page),
placeholderData: keepPreviousData,
})
```

View File

@@ -0,0 +1,38 @@
---
id: matchMutation
title: matchMutation
---
```ts
function matchMutation(filters, mutation): boolean;
```
Defined in: [packages/query-core/src/utils.ts:237](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L237)
Checks whether a mutation matches the given [MutationFilters](../interfaces/MutationFilters.md).
Every filter that is specified must match; filters that are left unspecified are ignored.
If a `mutationKey` filter is provided but the mutation has no `mutationKey` of its own, it does not match.
## Parameters
### filters
[`MutationFilters`](../interfaces/MutationFilters.md)
### mutation
[`Mutation`](../classes/Mutation.md)\<`any`, `any`\>
## Returns
`boolean`
## Example
```ts
const mutationCache = queryClient.getMutationCache()
const matchingMutations = mutationCache
.getAll()
.filter((mutation) => matchMutation({ mutationKey: ['addPost'] }, mutation))
```

View File

@@ -0,0 +1,37 @@
---
id: matchQuery
title: matchQuery
---
```ts
function matchQuery(filters, query): boolean;
```
Defined in: [packages/query-core/src/utils.ts:175](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L175)
Checks whether a query matches the given [QueryFilters](../interfaces/QueryFilters.md).
Every filter that is specified must match; filters that are left unspecified are ignored.
## Parameters
### filters
[`QueryFilters`](../interfaces/QueryFilters.md)
### query
[`Query`](../classes/Query.md)\<`any`, `any`, `any`, `any`\>
## Returns
`boolean`
## Example
```ts
const queryCache = queryClient.getQueryCache()
const matchingQueries = queryCache
.getAll()
.filter((query) => matchQuery({ queryKey: ['posts'] }, query))
```

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@@ -0,0 +1,299 @@
---
id: mutationOptions
title: mutationOptions
---
## Call Signature
```ts
function mutationOptions<TData, TError, TVariables, TOnMutateResult>(options): WithRequired<MutationOptions<TData, TError, TVariables, TOnMutateResult>, "mutationKey">;
```
Defined in: [packages/vue-query/src/mutationOptions.ts:34](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationOptions.ts#L34)
You can generally pass everything to `mutationOptions` that you can also pass to `useMutation`. A
`mutationKey` is required on this overload so the mutation can be looked up later, e.g. with
`useMutationState`.
### Type Parameters
#### TData
`TData` = `unknown`
#### TError
`TError` = `Error`
#### TVariables
`TVariables` = `void`
#### TOnMutateResult
`TOnMutateResult` = `unknown`
### Parameters
#### options
[`WithRequired`](../type-aliases/WithRequired.md)\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
The mutation options to use, identical to what you'd pass to `useMutation`, with a
required `mutationKey`.
### Returns
[`WithRequired`](../type-aliases/WithRequired.md)\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
The same options object, unchanged.
### See
[useMutation](useMutation.md) to run the mutation these options describe.
### Example
Looking the mutation up elsewhere via its `mutationKey`, e.g. for a global "saving…" indicator:
```vue
<script setup lang="ts">
import { mutationOptions, useMutationState } from '@tanstack/vue-query'
import { computed } from 'vue'
const createPostOptions = mutationOptions({
mutationKey: ['posts', 'create'],
mutationFn: createPost,
})
// Call `useMutationState` once — it manages its own subscription — then derive from its result.
const creatingPosts = useMutationState({
filters: { mutationKey: createPostOptions.mutationKey, status: 'pending' },
})
const isCreatingPost = computed(() => creatingPosts.value.length > 0)
</script>
```
## Call Signature
```ts
function mutationOptions<TData, TError, TVariables, TOnMutateResult>(options): () => WithRequired<MutationOptions<TData, TError, TVariables, TOnMutateResult>, "mutationKey">;
```
Defined in: [packages/vue-query/src/mutationOptions.ts:80](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationOptions.ts#L80)
Same as the plain-object overload with a required `mutationKey`, but for options that close over reactive
state (`ref`s read inside the function body). Wrap them in a getter so `useMutation` and the other consumers
always read the current values instead of the ones captured when the options were created.
### Type Parameters
#### TData
`TData` = `unknown`
#### TError
`TError` = `Error`
#### TVariables
`TVariables` = `void`
#### TOnMutateResult
`TOnMutateResult` = `unknown`
### Parameters
#### options
() => [`WithRequired`](../type-aliases/WithRequired.md)\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
A function returning the mutation options to use, with a required `mutationKey`,
re-evaluated on demand.
### Returns
A function that returns the same options object, unchanged.
```ts
(): WithRequired<MutationOptions<TData, TError, TVariables, TOnMutateResult>, "mutationKey">;
```
#### Returns
[`WithRequired`](../type-aliases/WithRequired.md)\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
### See
[useMutation](useMutation.md) to run the mutation these options describe.
### Example
```vue
<script setup lang="ts">
import { mutationOptions, useMutation } from '@tanstack/vue-query'
const props = defineProps<{ userId: number }>()
const createPostOptions = mutationOptions(() => ({
mutationKey: ['posts', 'create'],
// Reacts to changes on `props.userId`, unlike the plain-object overload.
mutationFn: (title: string) => createPost({ title, userId: props.userId }),
}))
const mutation = useMutation(createPostOptions)
</script>
<template>
<button @click="mutation.mutate('Hello')">Create</button>
</template>
```
## Call Signature
```ts
function mutationOptions<TData, TError, TVariables, TOnMutateResult>(options): Omit<MutationOptions<TData, TError, TVariables, TOnMutateResult>, "mutationKey">;
```
Defined in: [packages/vue-query/src/mutationOptions.ts:124](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationOptions.ts#L124)
You can generally pass everything to `mutationOptions` that you can also pass to `useMutation`. No
`mutationKey` is required on this overload — use this when you don't need to target the mutation via a
`mutationKey` filter later (e.g. with `useMutationState`); it can still be observed through other filters,
such as `status`.
### Type Parameters
#### TData
`TData` = `unknown`
#### TError
`TError` = `Error`
#### TVariables
`TVariables` = `void`
#### TOnMutateResult
`TOnMutateResult` = `unknown`
### Parameters
#### options
`Omit`\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
The mutation options to use, identical to what you'd pass to `useMutation`, without a
`mutationKey`.
### Returns
`Omit`\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
The same options object, unchanged.
### See
[useMutation](useMutation.md) to run the mutation these options describe.
### Remarks
See the other overload's example for looking a mutation up via `useMutationState`.
### Example
```vue
<script setup lang="ts">
import { mutationOptions, useMutation } from '@tanstack/vue-query'
const createPostOptions = mutationOptions({
mutationFn: createPost,
})
const mutation = useMutation(createPostOptions)
</script>
<template>
<button @click="mutation.mutate({ title: 'Hello' })">Create</button>
</template>
```
## Call Signature
```ts
function mutationOptions<TData, TError, TVariables, TOnMutateResult>(options): () => Omit<MutationOptions<TData, TError, TVariables, TOnMutateResult>, "mutationKey">;
```
Defined in: [packages/vue-query/src/mutationOptions.ts:169](https://github.com/TanStack/query/blob/main/packages/vue-query/src/mutationOptions.ts#L169)
Same as the plain-object overload without a `mutationKey`, but for options that close over reactive state
(`ref`s read inside the function body). Wrap them in a getter so `useMutation` and the other consumers
always read the current values instead of the ones captured when the options were created.
### Type Parameters
#### TData
`TData` = `unknown`
#### TError
`TError` = `Error`
#### TVariables
`TVariables` = `void`
#### TOnMutateResult
`TOnMutateResult` = `unknown`
### Parameters
#### options
() => `Omit`\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
A function returning the mutation options to use, without a `mutationKey`, re-evaluated on
demand.
### Returns
A function that returns the same options object, unchanged.
```ts
(): Omit<MutationOptions<TData, TError, TVariables, TOnMutateResult>, "mutationKey">;
```
#### Returns
`Omit`\<[`MutationOptions`](../type-aliases/MutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>, `"mutationKey"`\>
### See
[useMutation](useMutation.md) to run the mutation these options describe.
### Example
```vue
<script setup lang="ts">
import { mutationOptions, useMutation } from '@tanstack/vue-query'
const props = defineProps<{ userId: number }>()
const createPostOptions = mutationOptions(() => ({
// Reacts to changes on `props.userId`, unlike the plain-object overload.
mutationFn: (title: string) => createPost({ title, userId: props.userId }),
}))
const mutation = useMutation(createPostOptions)
</script>
<template>
<button @click="mutation.mutate('Hello')">Create</button>
</template>
```

View File

@@ -0,0 +1,32 @@
---
id: noop
title: noop
---
## Call Signature
```ts
function noop(): void;
```
Defined in: [packages/query-core/src/utils.ts:119](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L119)
A function that does nothing.
### Returns
`void`
## Call Signature
```ts
function noop(): undefined;
```
Defined in: [packages/query-core/src/utils.ts:120](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L120)
A function that does nothing.
### Returns
`undefined`

View File

@@ -0,0 +1,26 @@
---
id: partialMatchKey
title: partialMatchKey
---
```ts
function partialMatchKey(a, b): boolean;
```
Defined in: [packages/query-core/src/utils.ts:300](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L300)
Checks if key `b` partially matches with key `a`.
## Parameters
### a
readonly `unknown`[]
### b
readonly `unknown`[]
## Returns
`boolean`

View File

@@ -0,0 +1,310 @@
---
id: queryOptions
title: queryOptions
---
## Call Signature
```ts
function queryOptions<TQueryFnData, TError, TData, TQueryKey>(options): DefinedInitialQueryOptionsWithDataTag<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/vue-query/src/queryOptions.ts:244](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryOptions.ts#L244)
You can generally pass everything to `queryOptions` that you can also pass to `useQuery`. These options can
be shared across hooks and imperative APIs such as `queryClient.query`. `options.queryKey` is required and
is the query key to generate options for.
This overload is selected when `initialData` is set, so the resulting `data` is never `undefined`.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
[`DefinedInitialQueryOptions`](../type-aliases/DefinedInitialQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
The [DefinedInitialQueryOptions](../type-aliases/DefinedInitialQueryOptions.md) to use — everything you can pass to `useQuery`, with
`initialData` set.
### Returns
[`DefinedInitialQueryOptionsWithDataTag`](../type-aliases/DefinedInitialQueryOptionsWithDataTag.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
The same options object, typed so that `queryKey` carries the inferred data type.
### See
[useQuery](useQuery.md) to run a query with these options.
### Example
```vue
<script setup lang="ts">
import { queryOptions, useQuery } from '@tanstack/vue-query'
const postsOptions = queryOptions({
queryKey: ['posts'],
queryFn: fetchPosts,
initialData: [],
})
// `data` is `Post[]`, never `undefined`, thanks to `initialData` — even if a refetch fails,
// so the list stays visible alongside the error.
const { data, isError, error } = useQuery(postsOptions)
</script>
```
## Call Signature
```ts
function queryOptions<TQueryFnData, TError, TData, TQueryKey>(options): () => DefinedInitialQueryOptionsWithDataTag<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/vue-query/src/queryOptions.ts:281](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryOptions.ts#L281)
Same as the plain-object overload, but for options that close over reactive state (`ref`s read inside the
function body). Wrap them in a getter so `queryClient` methods like `invalidateQueries`/`fetchQuery` always
read the current values instead of the ones captured when the options were created.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
() => [`DefinedInitialQueryOptions`](../type-aliases/DefinedInitialQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
A function returning the [DefinedInitialQueryOptions](../type-aliases/DefinedInitialQueryOptions.md) to use, re-evaluated on demand.
### Returns
A function that returns the same options object, typed so that `queryKey` carries the inferred data
type.
```ts
(): DefinedInitialQueryOptionsWithDataTag<TQueryFnData, TError, TData, TQueryKey>;
```
#### Returns
[`DefinedInitialQueryOptionsWithDataTag`](../type-aliases/DefinedInitialQueryOptionsWithDataTag.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
### See
[useQuery](useQuery.md) to run a query with these options.
### Example
```vue
<script setup lang="ts">
import { ref } from 'vue'
import { queryOptions, useQuery } from '@tanstack/vue-query'
const postId = ref(1)
const postOptions = queryOptions(() => ({
queryKey: ['post', postId.value],
queryFn: () => fetchPost(postId.value),
initialData: { id: postId.value, title: '' },
}))
// Pass the getter itself, not `postOptions()`, so the query keeps reacting to `postId` changes.
const { data } = useQuery(postOptions)
</script>
```
## Call Signature
```ts
function queryOptions<TQueryFnData, TError, TData, TQueryKey>(options): UndefinedInitialQueryOptionsWithDataTag<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/vue-query/src/queryOptions.ts:326](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryOptions.ts#L326)
You can generally pass everything to `queryOptions` that you can also pass to `useQuery`. These options can
be shared across hooks and imperative APIs such as `queryClient.query`. `options.queryKey` is required and
is the query key to generate options for.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
[`UndefinedInitialQueryOptions`](../type-aliases/UndefinedInitialQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
The [UndefinedInitialQueryOptions](../type-aliases/UndefinedInitialQueryOptions.md) to use — everything you can pass to `useQuery`.
### Returns
[`UndefinedInitialQueryOptionsWithDataTag`](../type-aliases/UndefinedInitialQueryOptionsWithDataTag.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
The same options object, typed so that `queryKey` carries the inferred data type.
### See
[useQuery](useQuery.md) to run a query with these options.
### Example
A parameterized factory, so the same options object can be reused per `id`:
```vue
<script setup lang="ts">
import { queryOptions, useQuery } from '@tanstack/vue-query'
function postOptions(id: string) {
return queryOptions({
queryKey: ['post', id],
queryFn: () => fetchPost(id),
})
}
const { data, isPending, isError, error } = useQuery(postOptions('1'))
</script>
```
## Call Signature
```ts
function queryOptions<TQueryFnData, TError, TData, TQueryKey>(options): () => UndefinedInitialQueryOptionsWithDataTag<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/vue-query/src/queryOptions.ts:392](https://github.com/TanStack/query/blob/main/packages/vue-query/src/queryOptions.ts#L392)
Same as the plain-object overload, but for options that close over reactive state (`ref`s read inside the
function body). Wrap them in a getter so the `queryKey` — and anything else derived from a `ref` — reacts
to changes, and so `queryClient` methods like `invalidateQueries`/`fetchQuery` always read the current
values instead of the ones captured when the options were created.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
() => [`UndefinedInitialQueryOptions`](../type-aliases/UndefinedInitialQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
A function returning the [UndefinedInitialQueryOptions](../type-aliases/UndefinedInitialQueryOptions.md) to use, re-evaluated on
demand.
### Returns
A function that returns the same options object, typed so that `queryKey` carries the inferred
data type.
```ts
(): UndefinedInitialQueryOptionsWithDataTag<TQueryFnData, TError, TData, TQueryKey>;
```
#### Returns
[`UndefinedInitialQueryOptionsWithDataTag`](../type-aliases/UndefinedInitialQueryOptionsWithDataTag.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
### See
[useQuery](useQuery.md) to run a query with these options.
### Examples
```vue
<script setup lang="ts">
import { ref } from 'vue'
import { queryOptions, useQuery, useQueryClient } from '@tanstack/vue-query'
const postId = ref(1)
const postOptions = queryOptions(() => ({
queryKey: ['post', postId.value],
queryFn: () => fetchPost(postId.value),
}))
// Pass the getter itself, not `postOptions()`, so the query keeps reacting to `postId` changes.
const { data } = useQuery(postOptions)
const queryClient = useQueryClient()
// Here, call `postOptions()` so `invalidateQueries` reads the current `queryKey` right away.
queryClient.invalidateQueries(postOptions())
</script>
```
A parameterized factory that disables the query, type safe, until `postId` is set. The whole-options getter
re-evaluates `queryFn` on every change to `postId`. `queryFn` can also be a `computed`, but never a bare
getter, since a function there is the query function itself:
```vue
<script setup lang="ts">
import { queryOptions, skipToken, useQuery } from '@tanstack/vue-query'
function postOptions(postId: number | undefined) {
return queryOptions(() => ({
queryKey: ['post', postId],
queryFn: postId != null ? () => fetchPost(postId) : skipToken,
}))
}
const props = defineProps<{ postId: number | undefined }>()
const { data, isLoading, isError, error } = useQuery(postOptions(props.postId))
</script>
```

View File

@@ -0,0 +1,41 @@
---
id: replaceEqualDeep
title: replaceEqualDeep
---
```ts
function replaceEqualDeep<T>(
a,
b,
depth?): T;
```
Defined in: [packages/query-core/src/utils.ts:339](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L339)
This function returns `a` if `b` is deeply equal.
If not, it will replace any deeply equal children of `b` with those of `a`.
This can be used for structural sharing between JSON values for example.
## Type Parameters
### T
`T`
## Parameters
### a
`unknown`
### b
`T`
### depth?
`number`
## Returns
`T`

View File

@@ -0,0 +1,45 @@
---
id: shouldThrowError
title: shouldThrowError
---
```ts
function shouldThrowError<T>(throwOnError, params): boolean;
```
Defined in: [packages/query-core/src/utils.ts:576](https://github.com/TanStack/query/blob/main/packages/query-core/src/utils.ts#L576)
Resolves a `throwOnError` option to a boolean.
If `throwOnError` is a function, it is called with `params` (e.g. the error and, depending on the caller,
additional context such as the query or mutation) and its result is returned, allowing the throwing
behavior to be decided per error. Otherwise, `throwOnError` itself is coerced to a boolean (`undefined`
resolves to `false`).
## Type Parameters
### T
`T` *extends* (...`args`) => `boolean`
## Parameters
### throwOnError
`boolean` | `T` | `undefined`
### params
`Parameters`\<`T`\>
## Returns
`boolean`
## Example
```ts
const throwOnError =
query.state.error && typeof options.throwOnError === 'function'
? shouldThrowError(options.throwOnError, [query.state.error, query])
: options.throwOnError
```

View File

@@ -0,0 +1,386 @@
---
id: useInfiniteQuery
title: useInfiniteQuery
---
## Call Signature
```ts
function useInfiniteQuery<TQueryFnData, TError, TData, TQueryKey, TPageParam>(options, queryClient?): UseInfiniteQueryReturnType<TData, TError>;
```
Defined in: [packages/vue-query/src/useInfiniteQuery.ts:117](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useInfiniteQuery.ts#L117)
The options for `useInfiniteQuery` are identical to `useQuery`, with the addition of
`initialPageParam`, `getNextPageParam`, `getPreviousPageParam`, and `maxPages`.
This overload is selected when `initialData` is set, so the resulting `data` is never `undefined`.
`enabled` tracks reactive dependencies automatically as a `ref`, a plain value, or a reactive getter
(`() => ...`). `queryKey` reacts through a `ref` for the array itself, or `ref`s and reactive getters as
individual entries — the array itself can't be a bare getter.
### Type Parameters
#### TQueryFnData
`TQueryFnData`
#### TError
`TError` = `Error`
#### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### TPageParam
`TPageParam` = `unknown`
### Parameters
#### options
`MaybeRefOrGetter`\<[`DefinedInitialDataInfiniteOptions`](../type-aliases/DefinedInitialDataInfiniteOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>\>
The [DefinedInitialDataInfiniteOptions](../type-aliases/DefinedInitialDataInfiniteOptions.md) to use — everything you can pass to
`useInfiniteQuery`, with `initialData` set.
#### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
### Returns
[`UseInfiniteQueryReturnType`](../type-aliases/UseInfiniteQueryReturnType.md)\<`TData`, `TError`\>
The same properties as `useQuery`, with the addition of `fetchNextPage`, `fetchPreviousPage`,
`hasNextPage`, `hasPreviousPage`, `isFetchingNextPage`, and `isFetchingPreviousPage`. `data.value.pages` and
`data.value.pageParams` are also added, as long as a `select` doesn't change `TData` away from its default
`InfiniteData<TQueryFnData>` shape.
### Remarks
Keep in mind that imperative fetch calls, such as `fetchNextPage`, may interfere with the default
refetch behavior, resulting in outdated data. Make sure to call these functions only in response to user
actions, or add conditions like `hasNextPage && !isFetching`.
### Example
```vue
<script setup lang="ts">
import { useInfiniteQuery } from '@tanstack/vue-query'
// `data` is never `undefined`, thanks to `initialData` — even if a refetch fails, so the
// list stays visible alongside the error.
const { data, isError, error } = useInfiniteQuery({
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
initialData: { pages: [], pageParams: [] },
})
</script>
<template>
<span v-if="isError">Error: {{ error.message }}</span>
<ul>
<template v-for="page in data.pages" :key="page.nextId">
<li v-for="project in page.projects" :key="project.id">{{ project.name }}</li>
</template>
</ul>
</template>
```
## Call Signature
```ts
function useInfiniteQuery<TQueryFnData, TError, TData, TQueryKey, TPageParam>(options, queryClient?): UseInfiniteQueryReturnType<TData, TError>;
```
Defined in: [packages/vue-query/src/useInfiniteQuery.ts:251](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useInfiniteQuery.ts#L251)
The options for `useInfiniteQuery` are identical to `useQuery`, with the addition of
`initialPageParam`, `getNextPageParam`, `getPreviousPageParam`, and `maxPages`.
`enabled` tracks reactive dependencies automatically as a `ref`, a plain value, or a reactive getter
(`() => ...`). `queryKey` reacts through a `ref` for the array itself, or `ref`s and reactive getters as
individual entries — the array itself can't be a bare getter.
### Type Parameters
#### TQueryFnData
`TQueryFnData`
#### TError
`TError` = `Error`
#### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### TPageParam
`TPageParam` = `unknown`
### Parameters
#### options
`MaybeRefOrGetter`\<[`UndefinedInitialDataInfiniteOptions`](../type-aliases/UndefinedInitialDataInfiniteOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>\>
The [UndefinedInitialDataInfiniteOptions](../type-aliases/UndefinedInitialDataInfiniteOptions.md) to use — everything you can pass to
`useInfiniteQuery`.
#### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
### Returns
[`UseInfiniteQueryReturnType`](../type-aliases/UseInfiniteQueryReturnType.md)\<`TData`, `TError`\>
The same properties as `useQuery`, with the addition of `fetchNextPage`, `fetchPreviousPage`,
`hasNextPage`, `hasPreviousPage`, `isFetchingNextPage`, and `isFetchingPreviousPage`. `data.value.pages` and
`data.value.pageParams` are also added, as long as a `select` doesn't change `TData` away from its default
`InfiniteData<TQueryFnData>` shape.
### Remarks
Keep in mind that imperative fetch calls, such as `fetchNextPage`, may interfere with the default
refetch behavior, resulting in outdated data. Make sure to call these functions only in response to user
actions, or add conditions like `hasNextPage && !isFetching`.
### Examples
Fetching the next page from a "Load More" button click:
```vue
<script setup lang="ts">
import { useInfiniteQuery } from '@tanstack/vue-query'
const {
data,
isPending,
isError,
error,
fetchNextPage,
hasNextPage,
isFetching,
isFetchingNextPage,
} = useInfiniteQuery({
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
})
</script>
<template>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<template v-else>
<ul>
<template v-for="page in data.pages" :key="page.nextId">
<li v-for="project in page.projects" :key="project.id">{{ project.name }}</li>
</template>
</ul>
<button @click="fetchNextPage()" :disabled="!hasNextPage || isFetching">
{{ isFetchingNextPage ? 'Loading more...' : hasNextPage ? 'Load More' : 'Nothing more to load' }}
</button>
</template>
</template>
```
Fetching the next page automatically as the user scrolls, using an `IntersectionObserver` on a
sentinel element after the list:
```vue
<script setup lang="ts">
import { onUnmounted, ref, watch } from 'vue'
import { useInfiniteQuery } from '@tanstack/vue-query'
const {
data,
isPending,
isError,
error,
fetchNextPage,
hasNextPage,
isFetching,
isFetchingNextPage,
} = useInfiniteQuery({
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
})
const sentinel = ref<HTMLElement>()
let observer: IntersectionObserver | undefined
watch(sentinel, (el) => {
observer?.disconnect()
if (el == null) return
observer = new IntersectionObserver(([entry]) => {
if (entry?.isIntersecting && hasNextPage.value && !isFetching.value) {
fetchNextPage()
}
})
observer.observe(el)
})
onUnmounted(() => observer?.disconnect())
</script>
<template>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<template v-else>
<ul>
<template v-for="page in data.pages" :key="page.nextId">
<li v-for="project in page.projects" :key="project.id">{{ project.name }}</li>
</template>
</ul>
<div ref="sentinel">{{ isFetchingNextPage ? 'Loading more...' : '' }}</div>
</template>
</template>
```
## Call Signature
```ts
function useInfiniteQuery<TQueryFnData, TError, TData, TQueryKey, TPageParam>(options, queryClient?): UseInfiniteQueryReturnType<TData, TError>;
```
Defined in: [packages/vue-query/src/useInfiniteQuery.ts:347](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useInfiniteQuery.ts#L347)
Fallback overload for options whose `initialData` presence isn't statically known — for example, a
`ref`/reactive object built up conditionally, rather than a plain object literal. Prefer one of the other
overloads when possible, since they infer whether `data` can be `undefined` from `initialData` directly.
`enabled` tracks reactive dependencies automatically as a `ref`, a plain value, or a reactive getter
(`() => ...`). `queryKey` reacts through a `ref` for the array itself, or `ref`s and reactive getters as
individual entries — the array itself can't be a bare getter.
### Type Parameters
#### TQueryFnData
`TQueryFnData`
#### TError
`TError` = `Error`
#### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
#### TPageParam
`TPageParam` = `unknown`
### Parameters
#### options
`MaybeRefOrGetter`\<[`UseInfiniteQueryOptions`](../type-aliases/UseInfiniteQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>\>
A `ref`, plain value, or reactive getter resolving to the [UseInfiniteQueryOptions](../type-aliases/UseInfiniteQueryOptions.md) to
use.
#### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
### Returns
[`UseInfiniteQueryReturnType`](../type-aliases/UseInfiniteQueryReturnType.md)\<`TData`, `TError`\>
The same properties as `useQuery`, with the addition of `fetchNextPage`, `fetchPreviousPage`,
`hasNextPage`, `hasPreviousPage`, `isFetchingNextPage`, and `isFetchingPreviousPage`.
### Examples
Passing a whole-options getter so `maxPages` reacts to a setting stored elsewhere, not just `queryKey`:
```vue
<script setup lang="ts">
import { useInfiniteQuery } from '@tanstack/vue-query'
const props = defineProps<{ projectId: number; maxPages: number }>()
const { data } = useInfiniteQuery(() => ({
queryKey: ['project', props.projectId, 'issues'],
queryFn: ({ pageParam }) => fetchIssues(props.projectId, pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
maxPages: props.maxPages,
}))
</script>
<template>
<template v-for="page in data?.pages" :key="page.nextId">
<li v-for="issue in page.issues" :key="issue.id">{{ issue.title }}</li>
</template>
</template>
```
A query that's disabled, type-safe, until `postId` is set — pass `skipToken` as `queryFn` instead of
setting `enabled: false`. This requires a whole-options getter: `queryFn` isn't itself reactive, so the
getter is what re-evaluates it on every change to `props.postId`:
```vue
<script setup lang="ts">
import { skipToken, useInfiniteQuery } from '@tanstack/vue-query'
const props = defineProps<{ postId: string | undefined }>()
// Use `isLoading`, not `isPending`, so the loading state doesn't show while the query is disabled.
const { data, isLoading, isError, error } = useInfiniteQuery(() => {
const postId = props.postId
return {
queryKey: ['post', postId, 'comments'],
queryFn:
postId != null
? ({ pageParam }) => fetchComments(postId, pageParam)
: skipToken,
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
}
})
</script>
<template>
<span v-if="props.postId == null">Select a post</span>
<span v-else-if="isLoading">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<ul v-else>
<template v-for="page in data.pages" :key="page.nextId">
<li v-for="comment in page.comments" :key="comment.id">{{ comment.text }}</li>
</template>
</ul>
</template>
```

View File

@@ -0,0 +1,66 @@
---
id: useIsFetching
title: useIsFetching
---
```ts
function useIsFetching(fetchingFilters, queryClient?): Ref<number>;
```
Defined in: [packages/vue-query/src/useIsFetching.ts:54](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useIsFetching.ts#L54)
The `useIsFetching` composable returns a `ref` to the `number` of the queries that your application is
loading or fetching in the background (useful for app-wide loading indicators).
`fetchingFilters` may be a plain object, `MaybeRefDeep`, or a reactive getter (`() => ({ ... })`) — pass a
getter if the filters themselves depend on other reactive state.
## Parameters
### fetchingFilters
[`UseIsFetchingFilters`](../type-aliases/UseIsFetchingFilters.md) = `{}`
The [QueryFilters](../interfaces/QueryFilters.md) to narrow down the matched queries.
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
`Ref`\<`number`\>
A `ref` to the `number` of the queries that your application is currently loading or fetching in
the background.
## Examples
```vue
<script setup lang="ts">
import { useIsFetching } from '@tanstack/vue-query'
// How many queries matching the posts prefix are fetching?
const isFetchingPosts = useIsFetching({ queryKey: ['posts'] })
</script>
<template>
<span v-if="isFetchingPosts">Refreshing posts...</span>
</template>
```
A global loading indicator for any query fetching in the background, not just the ones on screen:
```vue
<script setup lang="ts">
import { useIsFetching } from '@tanstack/vue-query'
const isFetching = useIsFetching()
</script>
<template>
<div v-if="isFetching">Queries are fetching in the background...</div>
</template>
```

View File

@@ -0,0 +1,52 @@
---
id: useIsMutating
title: useIsMutating
---
```ts
function useIsMutating(filters, queryClient?): Ref<number>;
```
Defined in: [packages/vue-query/src/useMutationState.ts:53](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useMutationState.ts#L53)
The `useIsMutating` composable returns a `ref` to the `number` of mutations that your application currently
has `pending` (useful for app-wide loading indicators).
`filters` may be a plain object, `MaybeRefDeep`, or a reactive getter (`() => ({ ... })`) — pass a getter if
the filters themselves depend on other reactive state.
## Parameters
### filters
[`UseIsMutatingFilters`](../type-aliases/UseIsMutatingFilters.md) = `{}`
The [MutationFilters](../interfaces/MutationFilters.md) to narrow down the matched mutations.
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
`Ref`\<`number`\>
A `ref` to the `number` of the mutations that your application currently has `pending`.
## Example
```vue
<script setup lang="ts">
import { useIsMutating } from '@tanstack/vue-query'
// How many mutations matching the posts prefix are in progress?
const isMutatingPosts = useIsMutating({ mutationKey: ['posts'] })
</script>
<template>
<span v-if="isMutatingPosts">Saving posts...</span>
</template>
```

View File

@@ -0,0 +1,204 @@
---
id: useMutation
title: useMutation
---
```ts
function useMutation<TData, TError, TVariables, TOnMutateResult>(options, queryClient?): UseMutationReturnType<TData, TError, TVariables, TOnMutateResult>;
```
Defined in: [packages/vue-query/src/useMutation.ts:231](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useMutation.ts#L231)
Unlike queries, mutations are typically used to create/update/delete data or perform server side-effects.
`useMutation` is the composable for that.
`options` may be a plain object, a `ref`, or a reactive getter (`() => ({ ... })`) — pass a getter
if the options themselves depend on other reactive state.
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = `Error`
### TVariables
`TVariables` = `void`
### TOnMutateResult
`TOnMutateResult` = `unknown`
## Parameters
### options
[`UseMutationOptions`](../type-aliases/UseMutationOptions.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
The [UseMutationOptions](../type-aliases/UseMutationOptions.md) to use — everything you can pass to `useMutation`.
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
[`UseMutationReturnType`](../type-aliases/UseMutationReturnType.md)\<`TData`, `TError`, `TVariables`, `TOnMutateResult`\>
`mutate`/`mutateAsync` also accept per-call `onSuccess`/`onError`/`onSettled` callbacks as a second
argument, useful for triggering call-site side effects (e.g. navigation) without coupling them to the shared
mutation definition. Hook-level callbacks (passed to `options`) fire for every mutation; per-call
callbacks fire only for the latest call you've made.
## See
[mutationOptions](mutationOptions.md) to share these options across multiple `useMutation` call sites, or to look
the mutation up elsewhere via its `mutationKey` (e.g. with `useMutationState`).
## Examples
```vue
<script setup lang="ts">
import { useMutation, useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
const addMutation = useMutation({
mutationFn: addTodo,
onSuccess: () => queryClient.invalidateQueries({ queryKey: ['todos'] }),
})
function onAdd() {
addMutation.mutate('Item', {
onError: (error) => console.error('Failed to add item:', error),
})
}
</script>
<template>
<button @click="onAdd">Add</button>
</template>
```
Rendering the mutation's own state, rather than just firing it off:
```vue
<script setup lang="ts">
import { useMutation, useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
const addMutation = useMutation({
mutationFn: addTodo,
onSuccess: () => queryClient.invalidateQueries({ queryKey: ['todos'] }),
})
</script>
<template>
<div v-if="addMutation.isPending.value">Adding todo...</div>
<div v-else>
<div v-if="addMutation.isError.value">An error occurred: {{ addMutation.error.value.message }}</div>
<button @click="addMutation.mutate('Item')">Add</button>
</div>
</template>
```
Optimistic update via `onMutate`, rolling back on `onError`:
```vue
<script setup lang="ts">
import { useMutation, useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
const addMutation = useMutation({
mutationFn: addTodo,
onMutate: async (newTodo: string) => {
await queryClient.cancelQueries({ queryKey: ['todos'] })
const previousTodos = queryClient.getQueryData<Array<string>>(['todos'])
queryClient.setQueryData<Array<string>>(['todos'], (old) => [
...(old ?? []),
newTodo,
])
// Passed to `onError` as `onMutateResult` if the mutation fails.
return { previousTodos }
},
onError: (_err, _newTodo, onMutateResult) => {
queryClient.setQueryData(['todos'], onMutateResult?.previousTodos)
},
onSettled: () => {
queryClient.invalidateQueries({ queryKey: ['todos'] })
},
})
</script>
<template>
<button @click="addMutation.mutate('Item')">Add</button>
</template>
```
Callbacks passed per call to `mutate` only fire for the last call — `mutateAsync` gives you a
promise per call instead, so you can wait for all of them when they succeed:
```vue
<script setup lang="ts">
import { useMutation, useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
const addMutation = useMutation({
mutationFn: addTodo,
onSuccess: () => queryClient.invalidateQueries({ queryKey: ['todos'] }),
})
async function handleAddAll(todos: Array<string>) {
try {
await Promise.all(todos.map((todo) => addMutation.mutateAsync(todo)))
} catch (error) {
console.error('Failed to add todos:', error)
}
}
</script>
<template>
<button @click="handleAddAll(['Todo 1', 'Todo 2', 'Todo 3'])">Add all</button>
</template>
```
If some of the mutations above can fail independently of the others, and you want to know which ones
did — rather than losing that information the moment the first one rejects — swap `Promise.all` for
`Promise.allSettled`:
```vue
<script setup lang="ts">
import { useMutation, useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
const addMutation = useMutation({
mutationFn: addTodo,
onSuccess: () => queryClient.invalidateQueries({ queryKey: ['todos'] }),
})
async function handleAddAll(todos: Array<string>) {
const addResults = await Promise.allSettled(
todos.map((todo) => addMutation.mutateAsync(todo)),
)
addResults.forEach((addResult, index) => {
if (addResult.status === 'rejected') {
console.error(`Failed to add "${todos[index]}":`, addResult.reason)
}
})
}
</script>
<template>
<button @click="handleAddAll(['Todo 1', 'Todo 2', 'Todo 3'])">Add all</button>
</template>
```

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@@ -0,0 +1,111 @@
---
id: useMutationState
title: useMutationState
---
```ts
function useMutationState<TResult, TMutation>(options, queryClient?): Readonly<Ref<TResult[]>>;
```
Defined in: [packages/vue-query/src/useMutationState.ts:196](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useMutationState.ts#L196)
`useMutationState` is a composable that gives you access to all mutations in the `MutationCache`. You can
pass `filters` ([MutationFilters](../interfaces/MutationFilters.md)) to narrow down your mutations, and `select` to transform the
mutation state.
`options` may be a plain object or a reactive getter (`() => ({ ... })`) — pass a getter if the filters
themselves depend on other reactive state.
## Type Parameters
### TResult
`TResult` = [`MutationState`](../interfaces/MutationState.md)\<`unknown`, `Error`, `unknown`, `unknown`\>
### TMutation
`TMutation` *extends* [`Mutation`](../classes/Mutation.md)\<`any`, `any`, `any`, `any`\> = `MutationTypeFromResult`\<`TResult`\>
## Parameters
### options
The `filters` to narrow down matched mutations, and an optional `select` to transform the
mutation state.
[`MutationStateOptions`](../type-aliases/MutationStateOptions.md)\<`TResult`, `TMutation`\> | () => [`MutationStateOptions`](../type-aliases/MutationStateOptions.md)\<`TResult`, `TMutation`\>
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
`Readonly`\<`Ref`\<`TResult`[]\>\>
A `ref` to an Array of whatever `select` returns for each matching mutation.
## Examples
Get all variables of all running mutations:
```vue
<script setup lang="ts">
import { useMutationState } from '@tanstack/vue-query'
const pendingVariables = useMutationState({
filters: { status: 'pending' },
select: (mutation) => mutation.state.variables,
})
</script>
<template>{{ pendingVariables.length }} posts saving...</template>
```
Get all data for specific mutations via the `mutationKey`:
```vue
<script setup lang="ts">
import { useMutation, useMutationState } from '@tanstack/vue-query'
const mutationKey = ['posts']
// Some mutation that we want to get the state for
const mutation = useMutation({
mutationKey,
mutationFn: createPosts,
})
const savedPosts = useMutationState({
// this mutation key needs to match the mutation key of the given mutation (see above)
filters: { mutationKey, status: 'success' },
select: (mutation) => mutation.state.data,
})
</script>
<template>
<button @click="mutation.mutate(['New Post'])">
Create post ({{ savedPosts.length }} saved so far)
</button>
</template>
```
Access the latest successful mutation data via the `mutationKey`. Each invocation of `mutate` adds a new
entry to the mutation cache for `gcTime` milliseconds — with the `status: 'success'` filter below, check the
last item that `useMutationState` returns to get the latest successful invocation:
```vue
<script setup lang="ts">
import { computed } from 'vue'
import { useMutationState } from '@tanstack/vue-query'
const savedPosts = useMutationState({
filters: { mutationKey: ['posts'], status: 'success' },
select: (mutation) => mutation.state.data,
})
const latestSavedPost = computed(() => savedPosts.value[savedPosts.value.length - 1])
</script>
<template>{{ latestSavedPost ? 'Saved' : 'Nothing saved yet' }}</template>
```

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@@ -0,0 +1,94 @@
---
id: usePrefetchInfiniteQuery
title: usePrefetchInfiniteQuery
---
```ts
function usePrefetchInfiniteQuery<TQueryFnData, TError, TData, TQueryKey, TPageParam>(options, queryClient?): void;
```
Defined in: [packages/vue-query/src/usePrefetchInfiniteQuery.ts:94](https://github.com/TanStack/query/blob/main/packages/vue-query/src/usePrefetchInfiniteQuery.ts#L94)
`usePrefetchInfiniteQuery` does not return anything — it fires a prefetch as a reactive side effect, useful
for kicking off a fetch ahead of the component that will actually render the data with `useInfiniteQuery`.
You can pass everything to `usePrefetchInfiniteQuery` that you can pass to `queryClient.infiniteQuery`,
though `queryKey`, `initialPageParam`, and `getNextPageParam` are always required, and `queryFn` is required
unless a default query function has been defined.
`getNextPageParam` receives both the last page of the infinite list of data and the full array of all pages,
as well as pageParam information, and should return a single variable that will be passed to your query
function as `context.pageParam`. Return `undefined` or `null` to indicate there is no next page available.
The prefetch is skipped if the query already has any cached state — including a `pending`/`error` state left
over from a previous attempt — so it won't refetch data that's already there or already in flight. It
re-runs whenever a reactive dependency in `options` (built with `infiniteQueryOptions`, for example) changes.
Fire this during render, before a suspense boundary that wraps a component using `useInfiniteQuery`'s
`suspense()` — see the [Suspense guide](https://tanstack.com/query/latest/docs/framework/vue/guides/suspense).
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = `Error`
### TData
`TData` = [`InfiniteData`](../interfaces/InfiniteData.md)\<`TQueryFnData`, `unknown`\>
### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### TPageParam
`TPageParam` = `unknown`
## Parameters
### options
`MaybeRefOrGetter`\<`MaybeRefDeep`\<[`UsePrefetchInfiniteQueryOptions`](../type-aliases/UsePrefetchInfiniteQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>\>\>
A `ref`, plain value, or reactive getter resolving to the
[UsePrefetchInfiniteQueryOptions](../type-aliases/UsePrefetchInfiniteQueryOptions.md) to use — everything you can pass to `queryClient.infiniteQuery`.
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
`void`
`void` — nothing is returned.
## Example
```vue
<script setup lang="ts">
import { infiniteQueryOptions, usePrefetchInfiniteQuery } from '@tanstack/vue-query'
import Projects from './Projects.vue'
const projectsOptions = infiniteQueryOptions({
queryKey: ['projects'],
queryFn: ({ pageParam }) => fetchProjects(pageParam),
initialPageParam: 0,
getNextPageParam: (lastPage) => lastPage.nextId,
})
// Fire the prefetch as soon as this component runs, before `Projects` mounts and calls `useInfiniteQuery`.
usePrefetchInfiniteQuery(projectsOptions)
</script>
<template>
<Projects />
</template>
```

View File

@@ -0,0 +1,85 @@
---
id: usePrefetchQuery
title: usePrefetchQuery
---
```ts
function usePrefetchQuery<TQueryFnData, TError, TData, TQueryData, TQueryKey>(options, queryClient?): void;
```
Defined in: [packages/vue-query/src/usePrefetchQuery.ts:86](https://github.com/TanStack/query/blob/main/packages/vue-query/src/usePrefetchQuery.ts#L86)
`usePrefetchQuery` does not return anything — it fires a prefetch as a reactive side effect, useful for
kicking off a fetch ahead of the component that will actually render the data with `useQuery`. You can pass
everything to `usePrefetchQuery` that you can pass to `queryClient.query`, though `queryKey` is always
required, and `queryFn` is required unless a default query function has been defined.
The prefetch is skipped if the query already has any cached state — including a `pending`/`error` state left
over from a previous attempt — so it won't refetch data that's already there or already in flight. It
re-runs whenever a reactive dependency in `options` (built with `queryOptions`, for example) changes.
Fire this during render, before a suspense boundary that wraps a component using `useQuery`'s `suspense()`
— see the [Suspense guide](https://tanstack.com/query/latest/docs/framework/vue/guides/suspense).
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = `Error`
### TData
`TData` = `TQueryFnData`
### TQueryData
`TQueryData` = `TQueryFnData`
### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
## Parameters
### options
`MaybeRefOrGetter`\<`MaybeRefDeep`\<[`UsePrefetchQueryOptions`](../type-aliases/UsePrefetchQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryData`, `TQueryKey`\>\>\>
A `ref`, plain value, or reactive getter resolving to the [UsePrefetchQueryOptions](../type-aliases/UsePrefetchQueryOptions.md) to
use — everything you can pass to `queryClient.query`.
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
`void`
`void` — nothing is returned.
## Example
```vue
<script setup lang="ts">
import { usePrefetchQuery } from '@tanstack/vue-query'
import Posts from './Posts.vue'
// Fire the prefetch as soon as this component runs, before `Posts` mounts and calls `useQuery`.
usePrefetchQuery({
queryKey: ['posts'],
queryFn: fetchPosts,
})
</script>
<template>
<Posts />
</template>
```

View File

@@ -0,0 +1,156 @@
---
id: useQueries
title: useQueries
---
```ts
function useQueries<T, TCombinedResult>(__namedParameters, queryClient?): Readonly<Ref<TCombinedResult>>;
```
Defined in: [packages/vue-query/src/useQueries.ts:357](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useQueries.ts#L357)
The `useQueries` composable can be used to fetch a variable number of queries.
The `queries` option accepts an array of query option objects mostly identical to `useQuery`'s. It may be a
plain array, a `ref`/reactive array (each entry tracked individually), or a getter function — pass a getter
if the array itself (its length, or which queries are in it) depends on other reactive state.
Having the same query key more than once in the array of query objects may cause some data to be shared
between queries. To avoid this, consider de-duplicating the queries and map the results back to the desired
structure.
The `combine` option can be used to combine the results of the queries into a single value. The result will
be structurally shared to be as referentially stable as possible.
`placeholderData` is supported here too, but unlike `useQuery`, it doesn't receive information from
previously rendered queries, because the number of queries can differ between renders.
## Type Parameters
### T
`T` *extends* `any`[]
### TCombinedResult
`TCombinedResult` = `T` *extends* \[\] ? \[\] : `T` *extends* \[`Head`\] ? \[`GetUseQueryResult`\<`Head`\>\] : `T` *extends* \[`Head`, `...Tails[]`\] ? \[`...Tails[]`\] *extends* \[\] ? \[\] : \[`...Tails[]`\] *extends* \[`Head`\] ? \[`GetUseQueryResult`\<`Head`\>, `GetUseQueryResult`\<`Head`\>\] : \[`...Tails[]`\] *extends* \[`Head`, `...Tails[]`\] ? \[`...Tails[]`\] *extends* \[\] ? \[\] : \[`...Tails[]`\] *extends* \[`Head`\] ? \[`GetUseQueryResult`\<`Head`\>, `GetUseQueryResult`\<`Head`\>, `GetUseQueryResult`\<`Head`\>\] : \[`...Tails[]`\] *extends* \[`Head`, `...Tails[]`\] ? \[`...(...)[]`\] *extends* \[\] ? \[\] : ... *extends* ... ? ... : ... : \[`...{ [K in (...)]: (...) }[]`\] : \[...\{ \[K in string \| number \| symbol\]: GetUseQueryResult\<Tails\[K\<(...)\>\]\> \}\[\]\] : \{ \[K in string \| number \| symbol\]: GetUseQueryResult\<T\[K\<K\>\]\> \}
## Parameters
### \_\_namedParameters
`ShallowOption` & `object`
### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
## Returns
`Readonly`\<`Ref`\<`TCombinedResult`\>\>
A `ref` to the combined result. Without `combine`, this is an array with all the query results, in
the same order as the input. When `combine` is provided, this is the value returned by `combine` instead.
## Examples
```vue
<script setup lang="ts">
import { useQueries } from '@tanstack/vue-query'
const props = defineProps<{ ids: Array<number> }>()
const postQueries = useQueries({
queries: () =>
props.ids.map((id) => ({
queryKey: ['post', id],
queryFn: () => fetchPost(id),
staleTime: Infinity,
})),
})
</script>
<template>
<ul>
<li v-for="(query, index) in postQueries" :key="props.ids[index]">
<span v-if="query.isPending">Loading...</span>
<span v-else-if="query.isError">Error: {{ query.error.message }}</span>
<span v-else>{{ query.data.title }}</span>
</li>
</ul>
</template>
```
Combining results into a single value:
```vue
<script setup lang="ts">
import { useQueries } from '@tanstack/vue-query'
const props = defineProps<{ ids: Array<number> }>()
const combined = useQueries({
queries: () =>
props.ids.map((id) => ({
queryKey: ['post', id],
queryFn: () => fetchPost(id),
})),
combine: (postQueries) => ({
data: postQueries.map((query) => query.data),
isPending: postQueries.some((query) => query.isPending),
isError: postQueries.some((query) => query.isError),
}),
})
</script>
<template>
<span v-if="combined.isPending">Loading...</span>
<span v-else-if="combined.isError">Error!</span>
<ul v-else>
<li v-for="post in combined.data" :key="post.id">{{ post.title }}</li>
</ul>
</template>
```
Typing `select` via [queryOptions](queryOptions.md). Note that spreading a `queryOptions` result and overriding
`select` inline still falls back to `unknown` — wrap the spread in `queryOptions` again so the override is
resolved before it reaches `useQueries`:
```vue
<script setup lang="ts">
import { queryOptions, useQueries } from '@tanstack/vue-query'
const props = defineProps<{ id: number }>()
const postOptions = (id: number) =>
queryOptions({
queryKey: ['post', id],
queryFn: () => fetchPost(id),
})
const [{ data: broken }] = useQueries({
queries: () => [
{
...postOptions(props.id),
// ❌ `data` is `unknown` here
select: (data) => data.title,
},
],
})
const [{ data: fixed }] = useQueries({
queries: () => [
queryOptions({
...postOptions(props.id),
// ✅ `data` is `Post`
select: (data) => data.title,
}),
],
})
</script>
<template>
<h1>{{ fixed }}</h1>
</template>
```

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@@ -0,0 +1,359 @@
---
id: useQuery
title: useQuery
---
## Call Signature
```ts
function useQuery<TQueryFnData, TError, TData, TQueryKey>(options, queryClient?): UseQueryDefinedReturnType<TData, TError>;
```
Defined in: [packages/vue-query/src/useQuery.ts:65](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useQuery.ts#L65)
This overload is selected when `initialData` is set, so the resulting `data` is never `undefined`.
`enabled` tracks reactive dependencies automatically as a `ref`, a plain value, or a reactive getter
(`() => ...`). `queryKey` reacts through a `ref` or a reactive getter for the array itself, or `ref`s and
reactive getters as individual entries. Other options are read once when passed as a plain value, and stay
reactive when passed as a `ref` or a `computed`.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
[`DefinedInitialQueryOptions`](../type-aliases/DefinedInitialQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
The [DefinedInitialQueryOptions](../type-aliases/DefinedInitialQueryOptions.md) to use — everything you can pass to `useQuery`, with
`initialData` set.
#### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
### Returns
[`UseQueryDefinedReturnType`](../type-aliases/UseQueryDefinedReturnType.md)\<`TData`, `TError`\>
The current query result, typed so that `data` is never `undefined` (`status` never resolves to
`pending` in this overload's type, since `initialData` guarantees data upfront).
### Example
```vue
<script setup lang="ts">
import { useQuery } from '@tanstack/vue-query'
// `data` is `Post[]`, never `undefined`, thanks to `initialData` — even if a refetch fails,
// so the list stays visible alongside the error.
const { data, isError, error } = useQuery({
queryKey: ['posts'],
queryFn: fetchPosts,
initialData: [],
})
</script>
<template>
<span v-if="isError">Error: {{ error.message }}</span>
<ul>
<li v-for="post in data" :key="post.id">{{ post.title }}</li>
</ul>
</template>
```
## Call Signature
```ts
function useQuery<TQueryFnData, TError, TData, TQueryKey>(options, queryClient?): UseQueryReturnType<TData, TError>;
```
Defined in: [packages/vue-query/src/useQuery.ts:206](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useQuery.ts#L206)
`enabled` tracks reactive dependencies automatically as a `ref`, a plain value, or a reactive getter
(`() => ...`). `queryKey` reacts through a `ref` or a reactive getter for the array itself, or `ref`s and
reactive getters as individual entries. Other options are read once when passed as a plain value, and stay
reactive when passed as a `ref` or a `computed`.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
[`UndefinedInitialQueryOptions`](../type-aliases/UndefinedInitialQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`\>
The [UndefinedInitialQueryOptions](../type-aliases/UndefinedInitialQueryOptions.md) to use — everything you can pass to `useQuery`.
#### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
### Returns
[`UseQueryReturnType`](../type-aliases/UseQueryReturnType.md)\<`TData`, `TError`\>
The current query result. `status` is `pending` if there is no cached data to display, `error` if
the last fetch attempt failed, or `success` if the query has data to display.
### Examples
A query key built from a reactive `ref` — the query refetches whenever `postId` changes:
```vue
<script setup lang="ts">
import { ref } from 'vue'
import { useQuery } from '@tanstack/vue-query'
const postId = ref(1)
const { status, data, error } = useQuery({
queryKey: ['post', postId],
queryFn: () => fetchPost(postId.value),
})
</script>
<template>
<span v-if="status === 'pending'">Loading...</span>
<span v-else-if="status === 'error'">Error: {{ error.message }}</span>
<h1 v-else>{{ data.title }}</h1>
</template>
```
`select` derives whatever `data` a component needs from the cached value, without changing what's
actually stored in the cache — the cache still holds the full `Post[]`, but `data` here is a `number`:
```vue
<script setup lang="ts">
import { useQuery } from '@tanstack/vue-query'
const { data, isPending, isError, error } = useQuery({
queryKey: ['posts'],
queryFn: fetchPosts,
select: (posts) => posts.length,
})
</script>
<template>
<span v-if="isPending">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<span v-else>{{ data }} posts</span>
</template>
```
A dependent query, only enabled once `postId` is set — use `isLoading`, not `isPending`, so the
loading state doesn't show while the query is disabled:
```vue
<script setup lang="ts">
import { ref } from 'vue'
import { useQuery } from '@tanstack/vue-query'
const props = defineProps<{ postId: number | undefined }>()
const { data, isLoading, isError, error } = useQuery({
queryKey: ['post', props.postId],
queryFn: () => fetchPost(props.postId!),
enabled: () => props.postId != null,
})
</script>
<template>
<span v-if="props.postId == null">Select a post</span>
<span v-else-if="isLoading">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<h1 v-else>{{ data?.title }}</h1>
</template>
```
Seeding a detail query from an already-cached list, to skip the loading state:
```vue
<script setup lang="ts">
import { useQuery, useQueryClient } from '@tanstack/vue-query'
const props = defineProps<{ postId: number }>()
const queryClient = useQueryClient()
const { data, isError, error } = useQuery({
queryKey: ['post', props.postId],
queryFn: () => fetchPost(props.postId),
initialData: () =>
queryClient
.getQueryData<Array<Post>>(['posts'])
?.find((post) => post.id === props.postId),
})
</script>
<template>
<span v-if="isError">Error: {{ error.message }}</span>
<h1 v-else>{{ data?.title }}</h1>
</template>
```
Paginated data, keeping the previous page's data visible while the next page loads:
```vue
<script setup lang="ts">
import { ref } from 'vue'
import { keepPreviousData, useQuery } from '@tanstack/vue-query'
const page = ref(0)
const { data, isPlaceholderData, isError, error } = useQuery({
queryKey: ['posts', page],
queryFn: () => fetchPosts(page.value),
placeholderData: keepPreviousData,
})
</script>
<template>
<span v-if="isError">Error: {{ error.message }}</span>
<template v-else>
<ul>
<li v-for="post in data" :key="post.id">{{ post.title }}</li>
</ul>
<button :disabled="isPlaceholderData" @click="page++">Next Page</button>
</template>
</template>
```
## Call Signature
```ts
function useQuery<TQueryFnData, TError, TData, TQueryKey>(options, queryClient?): UseQueryReturnType<TData, TError>;
```
Defined in: [packages/vue-query/src/useQuery.ts:282](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useQuery.ts#L282)
Fallback overload for options whose `initialData` presence isn't statically known — for example, a
`ref`/reactive object built up conditionally, rather than a plain object literal. Prefer one of the other
overloads when possible, since they infer whether `data` can be `undefined` from `initialData` directly.
`enabled` tracks reactive dependencies automatically as a `ref`, a plain value, or a reactive getter
(`() => ...`). `queryKey` reacts through a `ref` or a reactive getter for the array itself, or `ref`s and
reactive getters as individual entries.
When `options` itself is a reactive getter, the whole object is re-evaluated on every change to its
dependencies, so any option inside it — not just `queryKey` and `enabled` — can change over time.
### Type Parameters
#### TQueryFnData
`TQueryFnData` = `unknown`
#### TError
`TError` = `Error`
#### TData
`TData` = `TQueryFnData`
#### TQueryKey
`TQueryKey` *extends* readonly `unknown`[] = readonly `unknown`[]
### Parameters
#### options
`MaybeRefOrGetter`\<[`UseQueryOptions`](../type-aliases/UseQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryFnData`, `TQueryKey`\>\>
A `ref`, plain value, or reactive getter resolving to the [UseQueryOptions](../type-aliases/UseQueryOptions.md) to use.
#### queryClient?
[`QueryClient`](../classes/QueryClient.md)
Use this to use a custom `QueryClient`. Otherwise, the one provided by `VueQueryPlugin`
will be used.
### Returns
[`UseQueryReturnType`](../type-aliases/UseQueryReturnType.md)\<`TData`, `TError`\>
The current query result, with `data` typed as possibly `undefined`.
### Examples
Passing a whole-options getter so `staleTime` reacts to a setting stored elsewhere, not just `queryKey`:
```vue
<script setup lang="ts">
import { useQuery } from '@tanstack/vue-query'
const props = defineProps<{ id: number; staleTime: number }>()
const { data } = useQuery(() => ({
queryKey: ['post', props.id],
queryFn: () => fetchPost(props.id),
staleTime: props.staleTime,
}))
</script>
<template>
<h1 v-if="data">{{ data.title }}</h1>
</template>
```
`skipToken` disables the query in a type-safe way, without a non-null assertion on `props.postId` —
`queryFn` is only ever called when it's defined. The whole-options getter re-evaluates `queryFn` on every
change to `props.postId`. `queryFn` can also be a `computed`, but never a bare getter, since a function
there is the query function itself. `refetch` doesn't work while `queryFn` is `skipToken` — use
`enabled: false` instead if you need to trigger the query manually:
```vue
<script setup lang="ts">
import { skipToken, useQuery } from '@tanstack/vue-query'
const props = defineProps<{ postId: number | undefined }>()
const { data, isLoading, isError, error } = useQuery(() => {
const postId = props.postId
return {
queryKey: ['post', postId],
queryFn: postId != null ? () => fetchPost(postId) : skipToken,
}
})
</script>
<template>
<span v-if="props.postId == null">Select a post</span>
<span v-else-if="isLoading">Loading...</span>
<span v-else-if="isError">Error: {{ error.message }}</span>
<h1 v-else>{{ data?.title }}</h1>
</template>
```

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---
id: useQueryClient
title: useQueryClient
---
```ts
function useQueryClient(id): QueryClient;
```
Defined in: [packages/vue-query/src/useQueryClient.ts:27](https://github.com/TanStack/query/blob/main/packages/vue-query/src/useQueryClient.ts#L27)
Retrieves the `QueryClient` installed by `VueQueryPlugin`, via Vue's `inject`. Must be called inside
`setup()` or another function that supports an injection context.
## Parameters
### id
`string` = `''`
The `queryClientKey` passed to `VueQueryPlugin` — only needed when multiple `QueryClient`s are
installed in the same app.
## Returns
[`QueryClient`](../classes/QueryClient.md)
## Throws
If called outside an injection context, or if no `QueryClient` was installed via `VueQueryPlugin`.
## Example
```vue
<script setup lang="ts">
import { useQueryClient } from '@tanstack/vue-query'
const queryClient = useQueryClient()
function invalidate() {
queryClient.invalidateQueries({ queryKey: ['todos'] })
}
</script>
```

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@@ -0,0 +1,207 @@
---
id: "@tanstack/vue-query"
title: "@tanstack/vue-query"
---
## Classes
- [CancelledError](classes/CancelledError.md)
- [InfiniteQueryObserver](classes/InfiniteQueryObserver.md)
- [Mutation](classes/Mutation.md)
- [MutationCache](classes/MutationCache.md)
- [MutationObserver](classes/MutationObserver.md)
- [QueriesObserver](classes/QueriesObserver.md)
- [Query](classes/Query.md)
- [QueryCache](classes/QueryCache.md)
- [QueryClient](classes/QueryClient.md)
- [QueryObserver](classes/QueryObserver.md)
## Interfaces
- [CancelOptions](interfaces/CancelOptions.md)
- [DefaultOptions](interfaces/DefaultOptions.md)
- [DehydratedState](interfaces/DehydratedState.md)
- [DehydrateOptions](interfaces/DehydrateOptions.md)
- [~~EnsureQueryDataOptions~~](interfaces/EnsureQueryDataOptions.md)
- [FetchNextPageOptions](interfaces/FetchNextPageOptions.md)
- [FetchPreviousPageOptions](interfaces/FetchPreviousPageOptions.md)
- [~~FetchQueryOptions~~](interfaces/FetchQueryOptions.md)
- [FocusManager](interfaces/FocusManager.md)
- [HydrateOptions](interfaces/HydrateOptions.md)
- [InfiniteData](interfaces/InfiniteData.md)
- [InfiniteQueryObserverBaseResult](interfaces/InfiniteQueryObserverBaseResult.md)
- [InfiniteQueryObserverLoadingErrorResult](interfaces/InfiniteQueryObserverLoadingErrorResult.md)
- [InfiniteQueryObserverLoadingResult](interfaces/InfiniteQueryObserverLoadingResult.md)
- [InfiniteQueryObserverOptions](interfaces/InfiniteQueryObserverOptions.md)
- [InfiniteQueryObserverPendingResult](interfaces/InfiniteQueryObserverPendingResult.md)
- [InfiniteQueryObserverPlaceholderResult](interfaces/InfiniteQueryObserverPlaceholderResult.md)
- [InfiniteQueryObserverRefetchErrorResult](interfaces/InfiniteQueryObserverRefetchErrorResult.md)
- [InfiniteQueryObserverSuccessResult](interfaces/InfiniteQueryObserverSuccessResult.md)
- [InfiniteQueryPageParamsOptions](interfaces/InfiniteQueryPageParamsOptions.md)
- [InitialPageParam](interfaces/InitialPageParam.md)
- [InvalidateOptions](interfaces/InvalidateOptions.md)
- [InvalidateQueryFilters](interfaces/InvalidateQueryFilters.md)
- [MutateOptions](interfaces/MutateOptions.md)
- [MutationCacheConfig](interfaces/MutationCacheConfig.md)
- [MutationFilters](interfaces/MutationFilters.md)
- [MutationObserverBaseResult](interfaces/MutationObserverBaseResult.md)
- [MutationObserverErrorResult](interfaces/MutationObserverErrorResult.md)
- [MutationObserverIdleResult](interfaces/MutationObserverIdleResult.md)
- [MutationObserverLoadingResult](interfaces/MutationObserverLoadingResult.md)
- [MutationObserverOptions](interfaces/MutationObserverOptions.md)
- [MutationObserverSuccessResult](interfaces/MutationObserverSuccessResult.md)
- [MutationState](interfaces/MutationState.md)
- [NotifyEvent](interfaces/NotifyEvent.md)
- [OnlineManager](interfaces/OnlineManager.md)
- [QueriesObserverOptions](interfaces/QueriesObserverOptions.md)
- [QueryCacheConfig](interfaces/QueryCacheConfig.md)
- [QueryClientConfig](interfaces/QueryClientConfig.md)
- [QueryExecuteOptions](interfaces/QueryExecuteOptions.md)
- [QueryFilters](interfaces/QueryFilters.md)
- [QueryObserverBaseResult](interfaces/QueryObserverBaseResult.md)
- [QueryObserverLoadingErrorResult](interfaces/QueryObserverLoadingErrorResult.md)
- [QueryObserverLoadingResult](interfaces/QueryObserverLoadingResult.md)
- [QueryObserverOptions](interfaces/QueryObserverOptions.md)
- [QueryObserverPendingResult](interfaces/QueryObserverPendingResult.md)
- [QueryObserverPlaceholderResult](interfaces/QueryObserverPlaceholderResult.md)
- [QueryObserverRefetchErrorResult](interfaces/QueryObserverRefetchErrorResult.md)
- [QueryObserverSuccessResult](interfaces/QueryObserverSuccessResult.md)
- [QueryState](interfaces/QueryState.md)
- [RefetchOptions](interfaces/RefetchOptions.md)
- [RefetchQueryFilters](interfaces/RefetchQueryFilters.md)
- [Register](interfaces/Register.md)
- [ResetOptions](interfaces/ResetOptions.md)
- [ResultOptions](interfaces/ResultOptions.md)
- [SetDataOptions](interfaces/SetDataOptions.md)
- [TimeoutManager](interfaces/TimeoutManager.md)
## Type Aliases
- [AnyDataTag](type-aliases/AnyDataTag.md)
- [DataTag](type-aliases/DataTag.md)
- [dataTagErrorSymbol](type-aliases/dataTagErrorSymbol.md)
- [dataTagSymbol](type-aliases/dataTagSymbol.md)
- [DefaultedInfiniteQueryObserverOptions](type-aliases/DefaultedInfiniteQueryObserverOptions.md)
- [DefaultedQueryObserverOptions](type-aliases/DefaultedQueryObserverOptions.md)
- [DefaultError](type-aliases/DefaultError.md)
- [DefinedInfiniteQueryObserverResult](type-aliases/DefinedInfiniteQueryObserverResult.md)
- [DefinedInitialDataInfiniteOptions](type-aliases/DefinedInitialDataInfiniteOptions.md)
- [DefinedInitialQueryOptions](type-aliases/DefinedInitialQueryOptions.md)
- [DefinedInitialQueryOptionsWithDataTag](type-aliases/DefinedInitialQueryOptionsWithDataTag.md)
- [DefinedQueryObserverResult](type-aliases/DefinedQueryObserverResult.md)
- [DistributiveOmit](type-aliases/DistributiveOmit.md)
- [~~EnsureInfiniteQueryDataOptions~~](type-aliases/EnsureInfiniteQueryDataOptions.md)
- [~~FetchInfiniteQueryOptions~~](type-aliases/FetchInfiniteQueryOptions.md)
- [FetchStatus](type-aliases/FetchStatus.md)
- [GetNextPageParamFunction](type-aliases/GetNextPageParamFunction.md)
- [GetPreviousPageParamFunction](type-aliases/GetPreviousPageParamFunction.md)
- [InferDataFromTag](type-aliases/InferDataFromTag.md)
- [InferErrorFromTag](type-aliases/InferErrorFromTag.md)
- [InfiniteQueryExecuteOptions](type-aliases/InfiniteQueryExecuteOptions.md)
- [InfiniteQueryObserverResult](type-aliases/InfiniteQueryObserverResult.md)
- [InitialDataFunction](type-aliases/InitialDataFunction.md)
- [ManagedTimerId](type-aliases/ManagedTimerId.md)
- [MutateFunction](type-aliases/MutateFunction.md)
- [MutateFunctionRest](type-aliases/MutateFunctionRest.md)
- [MutationCacheNotifyEvent](type-aliases/MutationCacheNotifyEvent.md)
- [MutationFunction](type-aliases/MutationFunction.md)
- [MutationFunctionContext](type-aliases/MutationFunctionContext.md)
- [MutationKey](type-aliases/MutationKey.md)
- [MutationMeta](type-aliases/MutationMeta.md)
- [MutationObserverResult](type-aliases/MutationObserverResult.md)
- [MutationOptions](type-aliases/MutationOptions.md)
- [MutationScope](type-aliases/MutationScope.md)
- [MutationStateOptions](type-aliases/MutationStateOptions.md)
- [MutationStatus](type-aliases/MutationStatus.md)
- [NetworkMode](type-aliases/NetworkMode.md)
- [NonUndefinedGuard](type-aliases/NonUndefinedGuard.md)
- [NotifyEventType](type-aliases/NotifyEventType.md)
- [NotifyOnChangeProps](type-aliases/NotifyOnChangeProps.md)
- [OmitKeyof](type-aliases/OmitKeyof.md)
- [Override](type-aliases/Override.md)
- [PlaceholderDataFunction](type-aliases/PlaceholderDataFunction.md)
- [QueriesPlaceholderDataFunction](type-aliases/QueriesPlaceholderDataFunction.md)
- [QueryBooleanOption](type-aliases/QueryBooleanOption.md)
- [QueryCacheNotifyEvent](type-aliases/QueryCacheNotifyEvent.md)
- [QueryFunction](type-aliases/QueryFunction.md)
- [QueryFunctionContext](type-aliases/QueryFunctionContext.md)
- [QueryKey](type-aliases/QueryKey.md)
- [QueryKeyHashFunction](type-aliases/QueryKeyHashFunction.md)
- [QueryKeyWithDataTag](type-aliases/QueryKeyWithDataTag.md)
- [QueryMeta](type-aliases/QueryMeta.md)
- [QueryObserverResult](type-aliases/QueryObserverResult.md)
- [QueryOptions](type-aliases/QueryOptions.md)
- [QueryPersister](type-aliases/QueryPersister.md)
- [QueryStatus](type-aliases/QueryStatus.md)
- [SkipToken](type-aliases/SkipToken.md)
- [StaleTime](type-aliases/StaleTime.md)
- [StaleTimeFunction](type-aliases/StaleTimeFunction.md)
- [ThrowOnError](type-aliases/ThrowOnError.md)
- [TimeoutCallback](type-aliases/TimeoutCallback.md)
- [TimeoutProvider](type-aliases/TimeoutProvider.md)
- [UndefinedInitialDataInfiniteOptions](type-aliases/UndefinedInitialDataInfiniteOptions.md)
- [UndefinedInitialQueryOptions](type-aliases/UndefinedInitialQueryOptions.md)
- [UndefinedInitialQueryOptionsWithDataTag](type-aliases/UndefinedInitialQueryOptionsWithDataTag.md)
- [UnsetMarker](type-aliases/UnsetMarker.md)
- [Updater](type-aliases/Updater.md)
- [UseInfiniteQueryOptions](type-aliases/UseInfiniteQueryOptions.md)
- [UseInfiniteQueryReturnType](type-aliases/UseInfiniteQueryReturnType.md)
- [UseIsFetchingFilters](type-aliases/UseIsFetchingFilters.md)
- [UseIsMutatingFilters](type-aliases/UseIsMutatingFilters.md)
- [UseMutationOptions](type-aliases/UseMutationOptions.md)
- [UseMutationReturnType](type-aliases/UseMutationReturnType.md)
- [UsePrefetchInfiniteQueryOptions](type-aliases/UsePrefetchInfiniteQueryOptions.md)
- [UsePrefetchQueryOptions](type-aliases/UsePrefetchQueryOptions.md)
- [UseQueriesOptions](type-aliases/UseQueriesOptions.md)
- [UseQueriesResults](type-aliases/UseQueriesResults.md)
- [UseQueryDefinedReturnType](type-aliases/UseQueryDefinedReturnType.md)
- [UseQueryOptions](type-aliases/UseQueryOptions.md)
- [UseQueryReturnType](type-aliases/UseQueryReturnType.md)
- [VueQueryPluginOptions](type-aliases/VueQueryPluginOptions.md)
- [WithRequired](type-aliases/WithRequired.md)
## Variables
- [dataTagErrorSymbol](variables/dataTagErrorSymbol.md)
- [dataTagSymbol](variables/dataTagSymbol.md)
- [defaultScheduler](variables/defaultScheduler.md)
- [environmentManager](variables/environmentManager.md)
- [focusManager](variables/focusManager.md)
- [~~isServer~~](variables/isServer.md)
- [notifyManager](variables/notifyManager.md)
- [onlineManager](variables/onlineManager.md)
- [skipToken](variables/skipToken.md)
- [timeoutManager](variables/timeoutManager.md)
- [unsetMarker](variables/unsetMarker.md)
- [VueQueryPlugin](variables/VueQueryPlugin.md)
## Functions
- [defaultShouldDehydrateMutation](functions/defaultShouldDehydrateMutation.md)
- [defaultShouldDehydrateQuery](functions/defaultShouldDehydrateQuery.md)
- [dehydrate](functions/dehydrate.md)
- [dehydrateQuery](functions/dehydrateQuery.md)
- [experimental\_streamedQuery](functions/experimental_streamedQuery.md)
- [hashKey](functions/hashKey.md)
- [hydrate](functions/hydrate.md)
- [infiniteQueryOptions](functions/infiniteQueryOptions.md)
- [~~isCancelledError~~](functions/isCancelledError.md)
- [keepPreviousData](functions/keepPreviousData.md)
- [matchMutation](functions/matchMutation.md)
- [matchQuery](functions/matchQuery.md)
- [mutationOptions](functions/mutationOptions.md)
- [noop](functions/noop.md)
- [partialMatchKey](functions/partialMatchKey.md)
- [queryOptions](functions/queryOptions.md)
- [replaceEqualDeep](functions/replaceEqualDeep.md)
- [shouldThrowError](functions/shouldThrowError.md)
- [useInfiniteQuery](functions/useInfiniteQuery.md)
- [useIsFetching](functions/useIsFetching.md)
- [useIsMutating](functions/useIsMutating.md)
- [useMutation](functions/useMutation.md)
- [useMutationState](functions/useMutationState.md)
- [usePrefetchInfiniteQuery](functions/usePrefetchInfiniteQuery.md)
- [usePrefetchQuery](functions/usePrefetchQuery.md)
- [useQueries](functions/useQueries.md)
- [useQuery](functions/useQuery.md)
- [useQueryClient](functions/useQueryClient.md)

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---
id: CancelOptions
title: CancelOptions
---
Defined in: [packages/query-core/src/types.ts:1521](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1521)
## Properties
### revert?
```ts
optional revert: boolean;
```
Defined in: [packages/query-core/src/types.ts:1522](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1522)
***
### silent?
```ts
optional silent: boolean;
```
Defined in: [packages/query-core/src/types.ts:1523](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1523)

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---
id: DefaultOptions
title: DefaultOptions
---
Defined in: [packages/query-core/src/types.ts:1507](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1507)
## Type Parameters
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### dehydrate?
```ts
optional dehydrate: DehydrateOptions;
```
Defined in: [packages/query-core/src/types.ts:1518](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1518)
Default options used when dehydrating the client's caches; see [DehydrateOptions](DehydrateOptions.md).
***
### hydrate?
```ts
optional hydrate: object;
```
Defined in: [packages/query-core/src/types.ts:1516](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1516)
Default options used when hydrating queries; see [HydrateOptions](HydrateOptions.md).
#### deserializeData?
```ts
optional deserializeData: TransformerFn;
```
Transforms a query's `data` after it is read from the dehydrated state, reversing `serializeData`.
#### mutations?
```ts
optional mutations: MutationOptions<unknown, Error, unknown, unknown>;
```
Default options merged into every mutation restored from the dehydrated state.
#### queries?
```ts
optional queries: QueryOptions<unknown, Error, unknown, readonly unknown[], never>;
```
Default options merged into every query restored from the dehydrated state.
***
### mutations?
```ts
optional mutations: MutationObserverOptions<unknown, TError, unknown, unknown>;
```
Defined in: [packages/query-core/src/types.ts:1514](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1514)
Default options applied to every mutation, unless overridden per-mutation.
***
### queries?
```ts
optional queries: OmitKeyof<QueryObserverOptions<unknown, TError, unknown, unknown, readonly unknown[], never>, "queryKey" | "suspense", "strictly">;
```
Defined in: [packages/query-core/src/types.ts:1509](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1509)
Default options applied to every query, unless overridden per-query.

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---
id: DehydrateOptions
title: DehydrateOptions
---
Defined in: [packages/query-core/src/hydration.ts:42](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L42)
Options for `dehydrate`, controlling which queries/mutations are included in the resulting `DehydratedState` and
how their data/errors are transformed before being serialized (e.g. for embedding in server-rendered markup).
## Properties
### serializeData?
```ts
optional serializeData: TransformerFn;
```
Defined in: [packages/query-core/src/hydration.ts:44](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L44)
Transforms a query's `data` before it is dehydrated. Useful for non-JSON-serializable data.
***
### shouldDehydrateMutation()?
```ts
optional shouldDehydrateMutation: (mutation) => boolean;
```
Defined in: [packages/query-core/src/hydration.ts:46](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L46)
Predicate to decide whether a given `Mutation` should be dehydrated. Defaults to `defaultShouldDehydrateMutation`.
#### Parameters
##### mutation
[`Mutation`](../classes/Mutation.md)
#### Returns
`boolean`
***
### shouldDehydrateQuery()?
```ts
optional shouldDehydrateQuery: (query) => boolean;
```
Defined in: [packages/query-core/src/hydration.ts:48](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L48)
Predicate to decide whether a given `Query` should be dehydrated. Defaults to `defaultShouldDehydrateQuery`.
#### Parameters
##### query
[`Query`](../classes/Query.md)
#### Returns
`boolean`
***
### shouldRedactErrors()?
```ts
optional shouldRedactErrors: (error) => boolean;
```
Defined in: [packages/query-core/src/hydration.ts:54](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L54)
Predicate to decide whether a query's error should be redacted before dehydration. Errors are redacted
(replaced with a generic `Error('redacted')`) unless this function is provided and returns `false` for the
given error, in which case the original error is kept.
#### Parameters
##### error
`unknown`
#### Returns
`boolean`

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---
id: DehydratedState
title: DehydratedState
---
Defined in: [packages/query-core/src/hydration.ts:94](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L94)
A serializable snapshot of a `QueryClient`'s cache, as produced by `dehydrate` and consumed by `hydrate`. Typically
transported from server to client (e.g. embedded in server-rendered markup) to seed the client's cache with data
that has already been fetched, avoiding a redundant fetch on the client.
## Properties
### mutations
```ts
mutations: DehydratedMutation[];
```
Defined in: [packages/query-core/src/hydration.ts:95](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L95)
***
### queries
```ts
queries: DehydratedQuery[];
```
Defined in: [packages/query-core/src/hydration.ts:96](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L96)

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---
id: EnsureQueryDataOptions
title: EnsureQueryDataOptions
---
Defined in: [packages/query-core/src/types.ts:614](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L614)
## Deprecated
## Extends
- [`FetchQueryOptions`](FetchQueryOptions.md)\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TData
`TData` = `TQueryFnData`
### TQueryKey
`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
### TPageParam
`TPageParam` = `never`
## Properties
### ~~gcTime?~~
```ts
optional gcTime: number;
```
Defined in: [packages/query-core/src/types.ts:277](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L277)
The time in milliseconds that unused/inactive cache data remains in memory.
When a query's cache becomes unused or inactive, that cache data will be garbage collected after this duration.
When different garbage collection times are specified, the longest one will be used.
Setting it to `Infinity` will disable garbage collection.
Defaults to `5 * 60 * 1000` (5 minutes), or `Infinity` during SSR.
Note: the maximum allowed time is about 24 days, imposed by `setTimeout`'s 32-bit signed integer delay — see
`timeoutManager.setTimeoutProvider` for a workaround.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`gcTime`](FetchQueryOptions.md#gctime)
***
### ~~initialData?~~
```ts
optional initialData:
| TData
| InitialDataFunction<TData>;
```
Defined in: [packages/query-core/src/types.ts:317](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L317)
If set, this value will be used as the initial data for the query cache (as long as the query hasn't been
created or cached yet).
If set to a function, the function will be called **once** during the shared/root query initialization, and be
expected to synchronously return the initial data.
Initial data is considered stale by default unless a `staleTime` has been set.
`initialData` **is persisted** to the cache.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`initialData`](FetchQueryOptions.md#initialdata)
***
### ~~initialDataUpdatedAt?~~
```ts
optional initialDataUpdatedAt: number | () => number | undefined;
```
Defined in: [packages/query-core/src/types.ts:321](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L321)
If set, this value will be used as the time (in milliseconds) of when the `initialData` itself was last updated.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`initialDataUpdatedAt`](FetchQueryOptions.md#initialdataupdatedat)
***
### ~~initialPageParam?~~
```ts
optional initialPageParam: undefined;
```
Defined in: [packages/query-core/src/types.ts:605](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L605)
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`initialPageParam`](FetchQueryOptions.md#initialpageparam)
***
### ~~maxPages?~~
```ts
optional maxPages: number;
```
Defined in: [packages/query-core/src/types.ts:345](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L345)
Maximum number of pages to store in the data of an infinite query.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`maxPages`](FetchQueryOptions.md#maxpages)
***
### ~~meta?~~
```ts
optional meta: Record<string, unknown>;
```
Defined in: [packages/query-core/src/types.ts:341](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L341)
Additional payload to be stored on each query.
Use this property to pass information that can be used in other places.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`meta`](FetchQueryOptions.md#meta)
***
### ~~networkMode?~~
```ts
optional networkMode: NetworkMode;
```
Defined in: [packages/query-core/src/types.ts:265](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L265)
Controls whether a query is allowed to run based on the current network connectivity.
Defaults to `'online'`.
#### See
[Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`networkMode`](FetchQueryOptions.md#networkmode)
***
### ~~persister?~~
```ts
optional persister: QueryPersister<TQueryFnData, NoInfer<TQueryKey>, TPageParam>;
```
Defined in: [packages/query-core/src/types.ts:290](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L290)
This option can be used to persist the result of a query to an external storage, bypassing the need to actually
call the `queryFn`. Useful for persisting a query's data across e.g. server/client boundaries.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`persister`](FetchQueryOptions.md#persister)
***
### ~~queryFn?~~
```ts
optional queryFn:
| typeof skipToken
| QueryFunction<TQueryFnData, TQueryKey, TPageParam>;
```
Defined in: [packages/query-core/src/types.ts:285](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L285)
The function that the query will use to request data.
Required, unless a default query function has been set via `queryClient.setQueryDefaults` or
`queryClient.setDefaultOptions`.
Receives a [QueryFunctionContext](../type-aliases/QueryFunctionContext.md).
Must return a promise that will either resolve data or throw an error. The data cannot be `undefined`.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`queryFn`](FetchQueryOptions.md#queryfn)
***
### ~~queryHash?~~
```ts
optional queryHash: string;
```
Defined in: [packages/query-core/src/types.ts:295](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L295)
The hashed form of `queryKey`, computed with `queryKeyHashFn` (or the default hashing function otherwise). Used
as the actual cache key internally.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`queryHash`](FetchQueryOptions.md#queryhash)
***
### ~~queryKey~~
```ts
queryKey: TQueryKey & object;
```
Defined in: [packages/query-core/src/types.ts:304](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L304)
The query key to use for this query.
The query key will be hashed into a stable hash. See [Query Keys](https://tanstack.com/query/latest/docs/framework/react/guides/query-keys)
for more information.
The query will automatically update when this key changes (as long as `enabled` is not set to `false`).
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`queryKey`](FetchQueryOptions.md#querykey)
***
### ~~queryKeyHashFn?~~
```ts
optional queryKeyHashFn: QueryKeyHashFunction<TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:308](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L308)
If specified, this function is used to hash the `queryKey` to a string.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`queryKeyHashFn`](FetchQueryOptions.md#querykeyhashfn)
***
### ~~retry?~~
```ts
optional retry: RetryValue<TError>;
```
Defined in: [packages/query-core/src/types.ts:246](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L246)
If `false`, failed queries will not retry by default.
If `true`, failed queries will retry infinitely.
If set to an integer number, e.g. 3, failed queries will retry until the failed query count meets that number.
If set to a function `(failureCount, error) => boolean` failed queries will retry until the function returns false.
Defaults to `3` on the client and `0` on the server.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`retry`](FetchQueryOptions.md#retry)
***
### ~~retryDelay?~~
```ts
optional retryDelay: RetryDelayValue<TError>;
```
Defined in: [packages/query-core/src/types.ts:258](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L258)
This function receives a `retryAttempt` integer and the actual Error and returns the delay to apply before the
next attempt in milliseconds.
A function like `attempt => Math.min(attempt > 1 ? 2 ** attempt * 1000 : 1000, 30 * 1000)` applies exponential
backoff.
A function like `attempt => attempt * 1000` applies linear backoff.
Defaults to a function that applies exponential backoff, capped at 30 seconds.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`retryDelay`](FetchQueryOptions.md#retrydelay)
***
### ~~revalidateIfStale?~~
```ts
optional revalidateIfStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:627](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L627)
***
### ~~staleTime?~~
```ts
optional staleTime: StaleTimeFunction<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:610](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L610)
The time in milliseconds after data is considered stale.
If the data is fresh it will be returned from the cache.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`staleTime`](FetchQueryOptions.md#staletime)
***
### ~~structuralSharing?~~
```ts
optional structuralSharing: boolean | (oldData, newData) => unknown;
```
Defined in: [packages/query-core/src/types.ts:330](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L330)
Set this to `false` to disable structural sharing between query results.
Set this to a function which accepts the old and new data and returns resolved data of the same type to implement custom structural sharing logic.
Defaults to `true`.
#### Inherited from
[`FetchQueryOptions`](FetchQueryOptions.md).[`structuralSharing`](FetchQueryOptions.md#structuralsharing)

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---
id: FetchNextPageOptions
title: FetchNextPageOptions
---
Defined in: [packages/query-core/src/types.ts:737](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L737)
## Extends
- [`ResultOptions`](ResultOptions.md)
## Properties
### cancelRefetch?
```ts
optional cancelRefetch: boolean;
```
Defined in: [packages/query-core/src/types.ts:746](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L746)
If set to `true`, calling `fetchNextPage` repeatedly will invoke `queryFn` every time,
whether the previous invocation has resolved or not. Also, the result from previous invocations will be ignored.
If set to `false`, calling `fetchNextPage` repeatedly won't have any effect until the first invocation has resolved.
Defaults to `true`.
***
### throwOnError?
```ts
optional throwOnError: boolean;
```
Defined in: [packages/query-core/src/types.ts:701](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L701)
If set to `true`, the method throws if any of the underlying query refetch tasks fail.
Defaults to `false`, in which case failed refetches are swallowed and not surfaced to the
caller.
#### Inherited from
[`ResultOptions`](ResultOptions.md).[`throwOnError`](ResultOptions.md#throwonerror)

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---
id: FetchPreviousPageOptions
title: FetchPreviousPageOptions
---
Defined in: [packages/query-core/src/types.ts:749](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L749)
## Extends
- [`ResultOptions`](ResultOptions.md)
## Properties
### cancelRefetch?
```ts
optional cancelRefetch: boolean;
```
Defined in: [packages/query-core/src/types.ts:758](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L758)
If set to `true`, calling `fetchPreviousPage` repeatedly will invoke `queryFn` every time,
whether the previous invocation has resolved or not. Also, the result from previous invocations will be ignored.
If set to `false`, calling `fetchPreviousPage` repeatedly won't have any effect until the first invocation has resolved.
Defaults to `true`.
***
### throwOnError?
```ts
optional throwOnError: boolean;
```
Defined in: [packages/query-core/src/types.ts:701](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L701)
If set to `true`, the method throws if any of the underlying query refetch tasks fail.
Defaults to `false`, in which case failed refetches are swallowed and not surfaced to the
caller.
#### Inherited from
[`ResultOptions`](ResultOptions.md).[`throwOnError`](ResultOptions.md#throwonerror)

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---
id: FetchQueryOptions
title: FetchQueryOptions
---
Defined in: [packages/query-core/src/types.ts:595](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L595)
## Deprecated
## Extends
- [`WithRequired`](../type-aliases/WithRequired.md)\<`QueryOptions`\<`TQueryFnData`, `TError`, `TData`, `TQueryKey`, `TPageParam`\>, `"queryKey"`\>
## Extended by
- [`EnsureQueryDataOptions`](EnsureQueryDataOptions.md)
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TData
`TData` = `TQueryFnData`
### TQueryKey
`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
### TPageParam
`TPageParam` = `never`
## Properties
### ~~gcTime?~~
```ts
optional gcTime: number;
```
Defined in: [packages/query-core/src/types.ts:277](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L277)
The time in milliseconds that unused/inactive cache data remains in memory.
When a query's cache becomes unused or inactive, that cache data will be garbage collected after this duration.
When different garbage collection times are specified, the longest one will be used.
Setting it to `Infinity` will disable garbage collection.
Defaults to `5 * 60 * 1000` (5 minutes), or `Infinity` during SSR.
Note: the maximum allowed time is about 24 days, imposed by `setTimeout`'s 32-bit signed integer delay — see
`timeoutManager.setTimeoutProvider` for a workaround.
#### Inherited from
```ts
WithRequired.gcTime
```
***
### ~~initialData?~~
```ts
optional initialData:
| TData
| InitialDataFunction<TData>;
```
Defined in: [packages/query-core/src/types.ts:317](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L317)
If set, this value will be used as the initial data for the query cache (as long as the query hasn't been
created or cached yet).
If set to a function, the function will be called **once** during the shared/root query initialization, and be
expected to synchronously return the initial data.
Initial data is considered stale by default unless a `staleTime` has been set.
`initialData` **is persisted** to the cache.
#### Inherited from
```ts
WithRequired.initialData
```
***
### ~~initialDataUpdatedAt?~~
```ts
optional initialDataUpdatedAt: number | () => number | undefined;
```
Defined in: [packages/query-core/src/types.ts:321](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L321)
If set, this value will be used as the time (in milliseconds) of when the `initialData` itself was last updated.
#### Inherited from
```ts
WithRequired.initialDataUpdatedAt
```
***
### ~~initialPageParam?~~
```ts
optional initialPageParam: undefined;
```
Defined in: [packages/query-core/src/types.ts:605](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L605)
***
### ~~maxPages?~~
```ts
optional maxPages: number;
```
Defined in: [packages/query-core/src/types.ts:345](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L345)
Maximum number of pages to store in the data of an infinite query.
#### Inherited from
```ts
WithRequired.maxPages
```
***
### ~~meta?~~
```ts
optional meta: Record<string, unknown>;
```
Defined in: [packages/query-core/src/types.ts:341](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L341)
Additional payload to be stored on each query.
Use this property to pass information that can be used in other places.
#### Inherited from
```ts
WithRequired.meta
```
***
### ~~networkMode?~~
```ts
optional networkMode: NetworkMode;
```
Defined in: [packages/query-core/src/types.ts:265](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L265)
Controls whether a query is allowed to run based on the current network connectivity.
Defaults to `'online'`.
#### See
[Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
```ts
WithRequired.networkMode
```
***
### ~~persister?~~
```ts
optional persister: QueryPersister<TQueryFnData, NoInfer<TQueryKey>, TPageParam>;
```
Defined in: [packages/query-core/src/types.ts:290](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L290)
This option can be used to persist the result of a query to an external storage, bypassing the need to actually
call the `queryFn`. Useful for persisting a query's data across e.g. server/client boundaries.
#### Inherited from
```ts
WithRequired.persister
```
***
### ~~queryFn?~~
```ts
optional queryFn:
| typeof skipToken
| QueryFunction<TQueryFnData, TQueryKey, TPageParam>;
```
Defined in: [packages/query-core/src/types.ts:285](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L285)
The function that the query will use to request data.
Required, unless a default query function has been set via `queryClient.setQueryDefaults` or
`queryClient.setDefaultOptions`.
Receives a [QueryFunctionContext](../type-aliases/QueryFunctionContext.md).
Must return a promise that will either resolve data or throw an error. The data cannot be `undefined`.
#### Inherited from
```ts
WithRequired.queryFn
```
***
### ~~queryHash?~~
```ts
optional queryHash: string;
```
Defined in: [packages/query-core/src/types.ts:295](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L295)
The hashed form of `queryKey`, computed with `queryKeyHashFn` (or the default hashing function otherwise). Used
as the actual cache key internally.
#### Inherited from
```ts
WithRequired.queryHash
```
***
### ~~queryKey~~
```ts
queryKey: TQueryKey & object;
```
Defined in: [packages/query-core/src/types.ts:304](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L304)
The query key to use for this query.
The query key will be hashed into a stable hash. See [Query Keys](https://tanstack.com/query/latest/docs/framework/react/guides/query-keys)
for more information.
The query will automatically update when this key changes (as long as `enabled` is not set to `false`).
#### Inherited from
```ts
WithRequired.queryKey
```
***
### ~~queryKeyHashFn?~~
```ts
optional queryKeyHashFn: QueryKeyHashFunction<TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:308](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L308)
If specified, this function is used to hash the `queryKey` to a string.
#### Inherited from
```ts
WithRequired.queryKeyHashFn
```
***
### ~~retry?~~
```ts
optional retry: RetryValue<TError>;
```
Defined in: [packages/query-core/src/types.ts:246](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L246)
If `false`, failed queries will not retry by default.
If `true`, failed queries will retry infinitely.
If set to an integer number, e.g. 3, failed queries will retry until the failed query count meets that number.
If set to a function `(failureCount, error) => boolean` failed queries will retry until the function returns false.
Defaults to `3` on the client and `0` on the server.
#### Inherited from
```ts
WithRequired.retry
```
***
### ~~retryDelay?~~
```ts
optional retryDelay: RetryDelayValue<TError>;
```
Defined in: [packages/query-core/src/types.ts:258](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L258)
This function receives a `retryAttempt` integer and the actual Error and returns the delay to apply before the
next attempt in milliseconds.
A function like `attempt => Math.min(attempt > 1 ? 2 ** attempt * 1000 : 1000, 30 * 1000)` applies exponential
backoff.
A function like `attempt => attempt * 1000` applies linear backoff.
Defaults to a function that applies exponential backoff, capped at 30 seconds.
#### Inherited from
```ts
WithRequired.retryDelay
```
***
### ~~staleTime?~~
```ts
optional staleTime: StaleTimeFunction<TQueryFnData, TError, TData, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:610](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L610)
The time in milliseconds after data is considered stale.
If the data is fresh it will be returned from the cache.
***
### ~~structuralSharing?~~
```ts
optional structuralSharing: boolean | (oldData, newData) => unknown;
```
Defined in: [packages/query-core/src/types.ts:330](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L330)
Set this to `false` to disable structural sharing between query results.
Set this to a function which accepts the old and new data and returns resolved data of the same type to implement custom structural sharing logic.
Defaults to `true`.
#### Inherited from
```ts
WithRequired.structuralSharing
```

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---
id: FocusManager
title: FocusManager
---
Defined in: [packages/query-core/src/focusManager.ts:14](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L14)
The `FocusManager` manages the focus state within TanStack Query.
It can be used to change the default event listeners or to manually change the focus state.
## Extends
- `Subscribable`\<`Listener`\>
## Properties
### listeners
```ts
protected listeners: Set<Listener>;
```
Defined in: [packages/query-core/src/subscribable.ts:2](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L2)
#### Inherited from
```ts
Subscribable.listeners
```
## Methods
### hasListeners()
```ts
hasListeners(): boolean;
```
Defined in: [packages/query-core/src/subscribable.ts:19](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L19)
#### Returns
`boolean`
#### Inherited from
```ts
Subscribable.hasListeners
```
***
### isFocused()
```ts
isFocused(): boolean;
```
Defined in: [packages/query-core/src/focusManager.ts:128](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L128)
`isFocused` can be used to get the current focus state.
#### Returns
`boolean`
***
### onFocus()
```ts
onFocus(): void;
```
Defined in: [packages/query-core/src/focusManager.ts:118](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L118)
`onFocus` notifies all subscribed listeners with the current focus state.
#### Returns
`void`
***
### onSubscribe()
```ts
protected onSubscribe(): void;
```
Defined in: [packages/query-core/src/focusManager.ts:39](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L39)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onSubscribe
```
***
### onUnsubscribe()
```ts
protected onUnsubscribe(): void;
```
Defined in: [packages/query-core/src/focusManager.ts:45](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L45)
#### Returns
`void`
#### Overrides
```ts
Subscribable.onUnsubscribe
```
***
### setEventListener()
```ts
setEventListener(setup): void;
```
Defined in: [packages/query-core/src/focusManager.ts:77](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L77)
`setEventListener` can be used to set a custom event listener that will
be used to determine the focus state. The provided `setup` function
receives a `setFocused` callback: call it with a `boolean` to manually
set the focus state, or with no arguments to re-evaluate the current
focus state and notify subscribers.
#### Parameters
##### setup
`SetupFn`
#### Returns
`void`
#### Example
```ts
import { focusManager } from '@tanstack/query-core'
focusManager.setEventListener((handleFocus) => {
const listener = () => handleFocus()
// Listen to visibilitychange
if (typeof window !== 'undefined' && window.addEventListener) {
window.addEventListener('visibilitychange', listener, false)
}
return () => {
// Be sure to unsubscribe if a new handler is set
window.removeEventListener('visibilitychange', listener)
}
})
```
***
### setFocused()
```ts
setFocused(focused?): void;
```
Defined in: [packages/query-core/src/focusManager.ts:107](https://github.com/TanStack/query/blob/main/packages/query-core/src/focusManager.ts#L107)
`setFocused` can be used to manually set the focus state. Set `undefined`
to fall back to the default focus check.
#### Parameters
##### focused?
`boolean`
#### Returns
`void`
#### Example
```ts
import { focusManager } from '@tanstack/query-core'
// Set focused
focusManager.setFocused(true)
// Set unfocused
focusManager.setFocused(false)
// Fallback to the default focus check
focusManager.setFocused(undefined)
```
***
### subscribe()
```ts
subscribe(listener): () => void;
```
Defined in: [packages/query-core/src/subscribable.ts:8](https://github.com/TanStack/query/blob/main/packages/query-core/src/subscribable.ts#L8)
#### Parameters
##### listener
`Listener`
#### Returns
```ts
(): void;
```
##### Returns
`void`
#### Inherited from
```ts
Subscribable.subscribe
```

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---
id: HydrateOptions
title: HydrateOptions
---
Defined in: [packages/query-core/src/hydration.ts:61](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L61)
Options for `hydrate`, controlling the default options applied to queries/mutations restored from a
`DehydratedState`, and how to reverse any transformation applied by `DehydrateOptions.serializeData`.
## Properties
### defaultOptions?
```ts
optional defaultOptions: object;
```
Defined in: [packages/query-core/src/hydration.ts:62](https://github.com/TanStack/query/blob/main/packages/query-core/src/hydration.ts#L62)
#### deserializeData?
```ts
optional deserializeData: TransformerFn;
```
Transforms a query's `data` after it is read from the dehydrated state, reversing `serializeData`.
#### mutations?
```ts
optional mutations: MutationOptions<unknown, Error, unknown, unknown>;
```
Default options merged into every mutation restored from the dehydrated state.
#### queries?
```ts
optional queries: QueryOptions<unknown, Error, unknown, readonly unknown[], never>;
```
Default options merged into every query restored from the dehydrated state.

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---
id: InfiniteData
title: InfiniteData
---
Defined in: [packages/query-core/src/types.ts:210](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L210)
## Type Parameters
### TData
`TData`
### TPageParam
`TPageParam` = `unknown`
## Properties
### pageParams
```ts
pageParams: TPageParam[];
```
Defined in: [packages/query-core/src/types.ts:212](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L212)
***
### pages
```ts
pages: TData[];
```
Defined in: [packages/query-core/src/types.ts:211](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L211)

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@@ -0,0 +1,577 @@
---
id: InfiniteQueryObserverBaseResult
title: InfiniteQueryObserverBaseResult
---
Defined in: [packages/query-core/src/types.ts:1001](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1001)
## Extends
- [`QueryObserverBaseResult`](QueryObserverBaseResult.md)\<`TData`, `TError`\>
## Extended by
- [`InfiniteQueryObserverPendingResult`](InfiniteQueryObserverPendingResult.md)
- [`InfiniteQueryObserverLoadingResult`](InfiniteQueryObserverLoadingResult.md)
- [`InfiniteQueryObserverLoadingErrorResult`](InfiniteQueryObserverLoadingErrorResult.md)
- [`InfiniteQueryObserverRefetchErrorResult`](InfiniteQueryObserverRefetchErrorResult.md)
- [`InfiniteQueryObserverSuccessResult`](InfiniteQueryObserverSuccessResult.md)
- [`InfiniteQueryObserverPlaceholderResult`](InfiniteQueryObserverPlaceholderResult.md)
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: TData | undefined;
```
Defined in: [packages/query-core/src/types.ts:771](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L771)
The last successfully resolved data for the query.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`data`](QueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`dataUpdatedAt`](QueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: TError | null;
```
Defined in: [packages/query-core/src/types.ts:780](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L780)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`error`](QueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`errorUpdateCount`](QueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`errorUpdatedAt`](QueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`failureCount`](QueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`failureReason`](QueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`fetchStatus`](QueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isEnabled`](QueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: boolean;
```
Defined in: [packages/query-core/src/types.ts:804](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L804)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isError`](QueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isFetched`](QueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isFetchedAfterMount`](QueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isFetching`](QueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
***
### isFetchNextPageError
```ts
isFetchNextPageError: boolean;
```
Defined in: [packages/query-core/src/types.ts:1028](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1028)
Will be `true` if the query failed while fetching the next page.
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: boolean;
```
Defined in: [packages/query-core/src/types.ts:1036](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1036)
Will be `true` if the query failed while fetching the previous page.
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isInitialLoading`](QueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:823](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L823)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isLoading`](QueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: boolean;
```
Defined in: [packages/query-core/src/types.ts:831](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L831)
Will be `true` if the query failed while fetching for the first time.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isLoadingError`](QueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isPaused`](QueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: boolean;
```
Defined in: [packages/query-core/src/types.ts:827](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L827)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isPending`](QueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: boolean;
```
Defined in: [packages/query-core/src/types.ts:845](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L845)
Will be `true` if the data shown is the placeholder data.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isPlaceholderData`](QueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: boolean;
```
Defined in: [packages/query-core/src/types.ts:849](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L849)
Will be `true` if the query failed while refetching.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isRefetchError`](QueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isRefetching`](QueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isStale`](QueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: boolean;
```
Defined in: [packages/query-core/src/types.ts:863](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L863)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`isSuccess`](QueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`refetch`](QueryObserverBaseResult.md#refetch)
***
### status
```ts
status: QueryStatus;
```
Defined in: [packages/query-core/src/types.ts:881](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L881)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Inherited from
[`QueryObserverBaseResult`](QueryObserverBaseResult.md).[`status`](QueryObserverBaseResult.md#status)

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@@ -0,0 +1,600 @@
---
id: InfiniteQueryObserverLoadingErrorResult
title: InfiniteQueryObserverLoadingErrorResult
---
Defined in: [packages/query-core/src/types.ts:1078](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1078)
## Extends
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)\<`TData`, `TError`\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: undefined;
```
Defined in: [packages/query-core/src/types.ts:1082](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1082)
The last successfully resolved data for the query.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`data`](InfiniteQueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`dataUpdatedAt`](InfiniteQueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: TError;
```
Defined in: [packages/query-core/src/types.ts:1083](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1083)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`error`](InfiniteQueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdateCount`](InfiniteQueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdatedAt`](InfiniteQueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureCount`](InfiniteQueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureReason`](InfiniteQueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchNextPage`](InfiniteQueryObserverBaseResult.md#fetchnextpage)
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchPreviousPage`](InfiniteQueryObserverBaseResult.md#fetchpreviouspage)
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchStatus`](InfiniteQueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasNextPage`](InfiniteQueryObserverBaseResult.md#hasnextpage)
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasPreviousPage`](InfiniteQueryObserverBaseResult.md#haspreviouspage)
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isEnabled`](InfiniteQueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: true;
```
Defined in: [packages/query-core/src/types.ts:1084](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1084)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isError`](InfiniteQueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetched`](InfiniteQueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchedAfterMount`](InfiniteQueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetching`](InfiniteQueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingNextPage`](InfiniteQueryObserverBaseResult.md#isfetchingnextpage)
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingPreviousPage`](InfiniteQueryObserverBaseResult.md#isfetchingpreviouspage)
***
### isFetchNextPageError
```ts
isFetchNextPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1089](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1089)
Will be `true` if the query failed while fetching the next page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchNextPageError`](InfiniteQueryObserverBaseResult.md#isfetchnextpageerror)
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1090](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1090)
Will be `true` if the query failed while fetching the previous page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchPreviousPageError`](InfiniteQueryObserverBaseResult.md#isfetchpreviouspageerror)
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isInitialLoading`](InfiniteQueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: false;
```
Defined in: [packages/query-core/src/types.ts:1086](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1086)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoading`](InfiniteQueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: true;
```
Defined in: [packages/query-core/src/types.ts:1087](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1087)
Will be `true` if the query failed while fetching for the first time.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoadingError`](InfiniteQueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPaused`](InfiniteQueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: false;
```
Defined in: [packages/query-core/src/types.ts:1085](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1085)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPending`](InfiniteQueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: false;
```
Defined in: [packages/query-core/src/types.ts:1092](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1092)
Will be `true` if the data shown is the placeholder data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPlaceholderData`](InfiniteQueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: false;
```
Defined in: [packages/query-core/src/types.ts:1088](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1088)
Will be `true` if the query failed while refetching.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetchError`](InfiniteQueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetching`](InfiniteQueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isStale`](InfiniteQueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: false;
```
Defined in: [packages/query-core/src/types.ts:1091](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1091)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isSuccess`](InfiniteQueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`refetch`](InfiniteQueryObserverBaseResult.md#refetch)
***
### status
```ts
status: "error";
```
Defined in: [packages/query-core/src/types.ts:1093](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1093)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`status`](InfiniteQueryObserverBaseResult.md#status)

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@@ -0,0 +1,600 @@
---
id: InfiniteQueryObserverLoadingResult
title: InfiniteQueryObserverLoadingResult
---
Defined in: [packages/query-core/src/types.ts:1060](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1060)
## Extends
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)\<`TData`, `TError`\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: undefined;
```
Defined in: [packages/query-core/src/types.ts:1064](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1064)
The last successfully resolved data for the query.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`data`](InfiniteQueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`dataUpdatedAt`](InfiniteQueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: null;
```
Defined in: [packages/query-core/src/types.ts:1065](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1065)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`error`](InfiniteQueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdateCount`](InfiniteQueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdatedAt`](InfiniteQueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureCount`](InfiniteQueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureReason`](InfiniteQueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchNextPage`](InfiniteQueryObserverBaseResult.md#fetchnextpage)
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchPreviousPage`](InfiniteQueryObserverBaseResult.md#fetchpreviouspage)
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchStatus`](InfiniteQueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasNextPage`](InfiniteQueryObserverBaseResult.md#hasnextpage)
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasPreviousPage`](InfiniteQueryObserverBaseResult.md#haspreviouspage)
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isEnabled`](InfiniteQueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: false;
```
Defined in: [packages/query-core/src/types.ts:1066](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1066)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isError`](InfiniteQueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetched`](InfiniteQueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchedAfterMount`](InfiniteQueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetching`](InfiniteQueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingNextPage`](InfiniteQueryObserverBaseResult.md#isfetchingnextpage)
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingPreviousPage`](InfiniteQueryObserverBaseResult.md#isfetchingpreviouspage)
***
### isFetchNextPageError
```ts
isFetchNextPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1071](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1071)
Will be `true` if the query failed while fetching the next page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchNextPageError`](InfiniteQueryObserverBaseResult.md#isfetchnextpageerror)
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1072](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1072)
Will be `true` if the query failed while fetching the previous page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchPreviousPageError`](InfiniteQueryObserverBaseResult.md#isfetchpreviouspageerror)
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isInitialLoading`](InfiniteQueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: true;
```
Defined in: [packages/query-core/src/types.ts:1068](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1068)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoading`](InfiniteQueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: false;
```
Defined in: [packages/query-core/src/types.ts:1069](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1069)
Will be `true` if the query failed while fetching for the first time.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoadingError`](InfiniteQueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPaused`](InfiniteQueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: true;
```
Defined in: [packages/query-core/src/types.ts:1067](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1067)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPending`](InfiniteQueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: false;
```
Defined in: [packages/query-core/src/types.ts:1074](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1074)
Will be `true` if the data shown is the placeholder data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPlaceholderData`](InfiniteQueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: false;
```
Defined in: [packages/query-core/src/types.ts:1070](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1070)
Will be `true` if the query failed while refetching.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetchError`](InfiniteQueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetching`](InfiniteQueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isStale`](InfiniteQueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: false;
```
Defined in: [packages/query-core/src/types.ts:1073](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1073)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isSuccess`](InfiniteQueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`refetch`](InfiniteQueryObserverBaseResult.md#refetch)
***
### status
```ts
status: "pending";
```
Defined in: [packages/query-core/src/types.ts:1075](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1075)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`status`](InfiniteQueryObserverBaseResult.md#status)

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---
id: InfiniteQueryObserverOptions
title: InfiniteQueryObserverOptions
---
Defined in: [packages/query-core/src/types.ts:539](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L539)
## Extends
- [`QueryObserverOptions`](QueryObserverOptions.md)\<`TQueryFnData`, `TError`, `TData`, [`InfiniteData`](InfiniteData.md)\<`TQueryFnData`, `TPageParam`\>, `TQueryKey`, `TPageParam`\>.[`InfiniteQueryPageParamsOptions`](InfiniteQueryPageParamsOptions.md)\<`TQueryFnData`, `TPageParam`\>
## Type Parameters
### TQueryFnData
`TQueryFnData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
### TData
`TData` = `TQueryFnData`
### TQueryKey
`TQueryKey` *extends* [`QueryKey`](../type-aliases/QueryKey.md) = [`QueryKey`](../type-aliases/QueryKey.md)
### TPageParam
`TPageParam` = `unknown`
## Properties
### enabled?
```ts
optional enabled: QueryBooleanOption<TQueryFnData, TError, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:398](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L398)
Set this to `false` or a function that returns `false` to disable automatic refetching when the query mounts or changes query keys.
To refetch the query, use the `refetch` method returned from the `useQuery` instance.
Accepts a boolean or function that returns a boolean.
Defaults to `true`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`enabled`](QueryObserverOptions.md#enabled)
***
### gcTime?
```ts
optional gcTime: number;
```
Defined in: [packages/query-core/src/types.ts:277](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L277)
The time in milliseconds that unused/inactive cache data remains in memory.
When a query's cache becomes unused or inactive, that cache data will be garbage collected after this duration.
When different garbage collection times are specified, the longest one will be used.
Setting it to `Infinity` will disable garbage collection.
Defaults to `5 * 60 * 1000` (5 minutes), or `Infinity` during SSR.
Note: the maximum allowed time is about 24 days, imposed by `setTimeout`'s 32-bit signed integer delay — see
`timeoutManager.setTimeoutProvider` for a workaround.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`gcTime`](QueryObserverOptions.md#gctime)
***
### getNextPageParam
```ts
getNextPageParam: GetNextPageParamFunction<TPageParam, TQueryFnData>;
```
Defined in: [packages/query-core/src/types.ts:365](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L365)
This function can be set to automatically get the next cursor for infinite queries.
The result will also be used to determine the value of `hasNextPage`.
#### Inherited from
[`InfiniteQueryPageParamsOptions`](InfiniteQueryPageParamsOptions.md).[`getNextPageParam`](InfiniteQueryPageParamsOptions.md#getnextpageparam)
***
### getPreviousPageParam?
```ts
optional getPreviousPageParam: GetPreviousPageParamFunction<TPageParam, TQueryFnData>;
```
Defined in: [packages/query-core/src/types.ts:360](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L360)
This function can be set to automatically get the previous cursor for infinite queries.
The result will also be used to determine the value of `hasPreviousPage`.
#### Inherited from
[`InfiniteQueryPageParamsOptions`](InfiniteQueryPageParamsOptions.md).[`getPreviousPageParam`](InfiniteQueryPageParamsOptions.md#getpreviouspageparam)
***
### initialData?
```ts
optional initialData:
| InfiniteData<TQueryFnData, TPageParam>
| InitialDataFunction<InfiniteData<TQueryFnData, TPageParam>>;
```
Defined in: [packages/query-core/src/types.ts:317](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L317)
If set, this value will be used as the initial data for the query cache (as long as the query hasn't been
created or cached yet).
If set to a function, the function will be called **once** during the shared/root query initialization, and be
expected to synchronously return the initial data.
Initial data is considered stale by default unless a `staleTime` has been set.
`initialData` **is persisted** to the cache.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`initialData`](QueryObserverOptions.md#initialdata)
***
### initialDataUpdatedAt?
```ts
optional initialDataUpdatedAt: number | () => number | undefined;
```
Defined in: [packages/query-core/src/types.ts:321](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L321)
If set, this value will be used as the time (in milliseconds) of when the `initialData` itself was last updated.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`initialDataUpdatedAt`](QueryObserverOptions.md#initialdataupdatedat)
***
### initialPageParam
```ts
initialPageParam: TPageParam;
```
Defined in: [packages/query-core/src/types.ts:349](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L349)
#### Inherited from
[`InfiniteQueryPageParamsOptions`](InfiniteQueryPageParamsOptions.md).[`initialPageParam`](InfiniteQueryPageParamsOptions.md#initialpageparam)
***
### maxPages?
```ts
optional maxPages: number;
```
Defined in: [packages/query-core/src/types.ts:345](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L345)
Maximum number of pages to store in the data of an infinite query.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`maxPages`](QueryObserverOptions.md#maxpages)
***
### meta?
```ts
optional meta: Record<string, unknown>;
```
Defined in: [packages/query-core/src/types.ts:341](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L341)
Additional payload to be stored on each query.
Use this property to pass information that can be used in other places.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`meta`](QueryObserverOptions.md#meta)
***
### networkMode?
```ts
optional networkMode: NetworkMode;
```
Defined in: [packages/query-core/src/types.ts:265](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L265)
Controls whether a query is allowed to run based on the current network connectivity.
Defaults to `'online'`.
#### See
[Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`networkMode`](QueryObserverOptions.md#networkmode)
***
### notifyOnChangeProps?
```ts
optional notifyOnChangeProps: NotifyOnChangeProps;
```
Defined in: [packages/query-core/src/types.ts:484](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L484)
If set, the component will only re-render if any of the listed properties change.
When set to `['data', 'error']`, the component will only re-render when the `data` or `error` properties change.
When set to `'all'`, the component will re-render whenever a query is updated.
When set to a function, the function will be executed to compute the list of properties.
Defaults to `undefined`, in which case property access is tracked automatically, and the
component only re-renders when one of the tracked properties changes.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`notifyOnChangeProps`](QueryObserverOptions.md#notifyonchangeprops)
***
### persister?
```ts
optional persister: QueryPersister<TQueryFnData, NoInfer<TQueryKey>, TPageParam>;
```
Defined in: [packages/query-core/src/types.ts:290](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L290)
This option can be used to persist the result of a query to an external storage, bypassing the need to actually
call the `queryFn`. Useful for persisting a query's data across e.g. server/client boundaries.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`persister`](QueryObserverOptions.md#persister)
***
### placeholderData?
```ts
optional placeholderData:
| InfiniteData<TQueryFnData, TPageParam>
| PlaceholderDataFunction<InfiniteData<TQueryFnData, TPageParam>, TError, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:511](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L511)
If set, this value will be used as the placeholder data for this particular query observer while the query is still in the `loading` data and no initialData has been provided.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`placeholderData`](QueryObserverOptions.md#placeholderdata)
***
### queryFn?
```ts
optional queryFn:
| typeof skipToken
| QueryFunction<TQueryFnData, TQueryKey, TPageParam>;
```
Defined in: [packages/query-core/src/types.ts:285](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L285)
The function that the query will use to request data.
Required, unless a default query function has been set via `queryClient.setQueryDefaults` or
`queryClient.setDefaultOptions`.
Receives a [QueryFunctionContext](../type-aliases/QueryFunctionContext.md).
Must return a promise that will either resolve data or throw an error. The data cannot be `undefined`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`queryFn`](QueryObserverOptions.md#queryfn)
***
### queryHash?
```ts
optional queryHash: string;
```
Defined in: [packages/query-core/src/types.ts:295](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L295)
The hashed form of `queryKey`, computed with `queryKeyHashFn` (or the default hashing function otherwise). Used
as the actual cache key internally.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`queryHash`](QueryObserverOptions.md#queryhash)
***
### queryKey
```ts
queryKey: TQueryKey & object;
```
Defined in: [packages/query-core/src/types.ts:304](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L304)
The query key to use for this query.
The query key will be hashed into a stable hash. See [Query Keys](https://tanstack.com/query/latest/docs/framework/react/guides/query-keys)
for more information.
The query will automatically update when this key changes (as long as `enabled` is not set to `false`).
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`queryKey`](QueryObserverOptions.md#querykey)
***
### queryKeyHashFn?
```ts
optional queryKeyHashFn: QueryKeyHashFunction<TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:308](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L308)
If specified, this function is used to hash the `queryKey` to a string.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`queryKeyHashFn`](QueryObserverOptions.md#querykeyhashfn)
***
### refetchInterval?
```ts
optional refetchInterval: number | false | (query) => number | false | undefined;
```
Defined in: [packages/query-core/src/types.ts:414](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L414)
If set to a number, the query will continuously refetch at this frequency in milliseconds.
If set to a function, the function will be executed with the latest data and query to compute a frequency
Defaults to `false`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`refetchInterval`](QueryObserverOptions.md#refetchinterval)
***
### refetchIntervalInBackground?
```ts
optional refetchIntervalInBackground: boolean;
```
Defined in: [packages/query-core/src/types.ts:425](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L425)
If set to `true`, the query will continue to refetch while their tab/window is in the background.
Defaults to `false`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`refetchIntervalInBackground`](QueryObserverOptions.md#refetchintervalinbackground)
***
### refetchOnMount?
```ts
optional refetchOnMount: boolean | "always" | (query) => boolean | "always";
```
Defined in: [packages/query-core/src/types.ts:462](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L462)
If set to `true`, the query will refetch on mount if the data is stale.
If set to `false`, will disable additional instances of a query to trigger background refetch.
If set to `'always'`, the query will always refetch on mount (except when `staleTime: 'static'` is used).
If set to a function, the function will be executed with the latest data and query to compute the value
Defaults to `true`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`refetchOnMount`](QueryObserverOptions.md#refetchonmount)
***
### refetchOnReconnect?
```ts
optional refetchOnReconnect: boolean | "always" | (query) => boolean | "always";
```
Defined in: [packages/query-core/src/types.ts:448](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L448)
If set to `true`, the query will refetch on reconnect if the data is stale.
If set to `false`, the query will not refetch on reconnect.
If set to `'always'`, the query will always refetch on reconnect (except when `staleTime: 'static'` is used).
If set to a function, the function will be executed with the latest data and query to compute the value.
Defaults to `true` unless `networkMode` is `'always'`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`refetchOnReconnect`](QueryObserverOptions.md#refetchonreconnect)
***
### refetchOnWindowFocus?
```ts
optional refetchOnWindowFocus: boolean | "always" | (query) => boolean | "always";
```
Defined in: [packages/query-core/src/types.ts:434](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L434)
If set to `true`, the query will refetch on window focus if the data is stale.
If set to `false`, the query will not refetch on window focus.
If set to `'always'`, the query will always refetch on window focus (except when `staleTime: 'static'` is used).
If set to a function, the function will be executed with the latest data and query to compute the value.
Defaults to `true`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`refetchOnWindowFocus`](QueryObserverOptions.md#refetchonwindowfocus)
***
### retry?
```ts
optional retry: RetryValue<TError>;
```
Defined in: [packages/query-core/src/types.ts:246](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L246)
If `false`, failed queries will not retry by default.
If `true`, failed queries will retry infinitely.
If set to an integer number, e.g. 3, failed queries will retry until the failed query count meets that number.
If set to a function `(failureCount, error) => boolean` failed queries will retry until the function returns false.
Defaults to `3` on the client and `0` on the server.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`retry`](QueryObserverOptions.md#retry)
***
### retryDelay?
```ts
optional retryDelay: RetryDelayValue<TError>;
```
Defined in: [packages/query-core/src/types.ts:258](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L258)
This function receives a `retryAttempt` integer and the actual Error and returns the delay to apply before the
next attempt in milliseconds.
A function like `attempt => Math.min(attempt > 1 ? 2 ** attempt * 1000 : 1000, 30 * 1000)` applies exponential
backoff.
A function like `attempt => attempt * 1000` applies linear backoff.
Defaults to a function that applies exponential backoff, capped at 30 seconds.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`retryDelay`](QueryObserverOptions.md#retrydelay)
***
### retryOnMount?
```ts
optional retryOnMount: QueryBooleanOption<TQueryFnData, TError, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:474](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L474)
If set to `false`, the query will not be retried on mount if it contains an error.
If set to a function, the function will be executed with the query to compute the value.
Defaults to `true`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`retryOnMount`](QueryObserverOptions.md#retryonmount)
***
### select()?
```ts
optional select: (data) => TData;
```
Defined in: [packages/query-core/src/types.ts:500](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L500)
This option can be used to transform or select a part of the data returned by the query function. It affects
the returned `data` value, but does not affect what gets stored in the query cache.
The `select` function will only run if `data` changed, or if the reference to the `select` function itself
changes. To optimize, memoize the function so its reference stays stable across calls.
#### Parameters
##### data
[`InfiniteData`](InfiniteData.md)
#### Returns
`TData`
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`select`](QueryObserverOptions.md#select)
***
### staleTime?
```ts
optional staleTime: StaleTimeFunction<TQueryFnData, TError, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:407](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L407)
The time in milliseconds after data is considered stale.
If set to `Infinity`, the data will never be considered stale.
If set to `'static'`, the data will never be considered stale.
If set to a function, the function will be executed with the query to compute a `staleTime`.
Defaults to `0`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`staleTime`](QueryObserverOptions.md#staletime)
***
### structuralSharing?
```ts
optional structuralSharing: boolean | (oldData, newData) => unknown;
```
Defined in: [packages/query-core/src/types.ts:330](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L330)
Set this to `false` to disable structural sharing between query results.
Set this to a function which accepts the old and new data and returns resolved data of the same type to implement custom structural sharing logic.
Defaults to `true`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`structuralSharing`](QueryObserverOptions.md#structuralsharing)
***
### suspense?
```ts
optional suspense: boolean;
```
Defined in: [packages/query-core/src/types.ts:507](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L507)
If set to `true`, the query will suspend when `status === 'pending'`
and throw errors when `status === 'error'`.
Defaults to `false`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`suspense`](QueryObserverOptions.md#suspense)
***
### throwOnError?
```ts
optional throwOnError: ThrowOnError<TQueryFnData, TError, InfiniteData<TQueryFnData, TPageParam>, TQueryKey>;
```
Defined in: [packages/query-core/src/types.ts:493](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L493)
Whether errors should be thrown instead of setting the `error` property.
If set to `true` or `suspense` is `true`, all errors will be thrown to the error boundary.
If set to `false` and `suspense` is `false`, errors are returned as state.
If set to a function, it will be passed the error and the query, and it should return a boolean indicating whether to show the error in an error boundary (`true`) or return the error as state (`false`).
Defaults to `false`.
#### Inherited from
[`QueryObserverOptions`](QueryObserverOptions.md).[`throwOnError`](QueryObserverOptions.md#throwonerror)

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@@ -0,0 +1,600 @@
---
id: InfiniteQueryObserverPendingResult
title: InfiniteQueryObserverPendingResult
---
Defined in: [packages/query-core/src/types.ts:1043](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1043)
## Extends
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)\<`TData`, `TError`\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: undefined;
```
Defined in: [packages/query-core/src/types.ts:1047](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1047)
The last successfully resolved data for the query.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`data`](InfiniteQueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`dataUpdatedAt`](InfiniteQueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: null;
```
Defined in: [packages/query-core/src/types.ts:1048](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1048)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`error`](InfiniteQueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdateCount`](InfiniteQueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdatedAt`](InfiniteQueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureCount`](InfiniteQueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureReason`](InfiniteQueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchNextPage`](InfiniteQueryObserverBaseResult.md#fetchnextpage)
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchPreviousPage`](InfiniteQueryObserverBaseResult.md#fetchpreviouspage)
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchStatus`](InfiniteQueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasNextPage`](InfiniteQueryObserverBaseResult.md#hasnextpage)
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasPreviousPage`](InfiniteQueryObserverBaseResult.md#haspreviouspage)
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isEnabled`](InfiniteQueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: false;
```
Defined in: [packages/query-core/src/types.ts:1049](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1049)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isError`](InfiniteQueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetched`](InfiniteQueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchedAfterMount`](InfiniteQueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetching`](InfiniteQueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingNextPage`](InfiniteQueryObserverBaseResult.md#isfetchingnextpage)
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingPreviousPage`](InfiniteQueryObserverBaseResult.md#isfetchingpreviouspage)
***
### isFetchNextPageError
```ts
isFetchNextPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1053](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1053)
Will be `true` if the query failed while fetching the next page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchNextPageError`](InfiniteQueryObserverBaseResult.md#isfetchnextpageerror)
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1054](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1054)
Will be `true` if the query failed while fetching the previous page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchPreviousPageError`](InfiniteQueryObserverBaseResult.md#isfetchpreviouspageerror)
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isInitialLoading`](InfiniteQueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:823](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L823)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoading`](InfiniteQueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: false;
```
Defined in: [packages/query-core/src/types.ts:1051](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1051)
Will be `true` if the query failed while fetching for the first time.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoadingError`](InfiniteQueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPaused`](InfiniteQueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: true;
```
Defined in: [packages/query-core/src/types.ts:1050](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1050)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPending`](InfiniteQueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: false;
```
Defined in: [packages/query-core/src/types.ts:1056](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1056)
Will be `true` if the data shown is the placeholder data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPlaceholderData`](InfiniteQueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: false;
```
Defined in: [packages/query-core/src/types.ts:1052](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1052)
Will be `true` if the query failed while refetching.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetchError`](InfiniteQueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetching`](InfiniteQueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isStale`](InfiniteQueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: false;
```
Defined in: [packages/query-core/src/types.ts:1055](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1055)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isSuccess`](InfiniteQueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`refetch`](InfiniteQueryObserverBaseResult.md#refetch)
***
### status
```ts
status: "pending";
```
Defined in: [packages/query-core/src/types.ts:1057](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1057)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`status`](InfiniteQueryObserverBaseResult.md#status)

View File

@@ -0,0 +1,600 @@
---
id: InfiniteQueryObserverPlaceholderResult
title: InfiniteQueryObserverPlaceholderResult
---
Defined in: [packages/query-core/src/types.ts:1130](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1130)
## Extends
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)\<`TData`, `TError`\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: TData;
```
Defined in: [packages/query-core/src/types.ts:1134](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1134)
The last successfully resolved data for the query.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`data`](InfiniteQueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`dataUpdatedAt`](InfiniteQueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: null;
```
Defined in: [packages/query-core/src/types.ts:1136](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1136)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`error`](InfiniteQueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdateCount`](InfiniteQueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdatedAt`](InfiniteQueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureCount`](InfiniteQueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureReason`](InfiniteQueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchNextPage`](InfiniteQueryObserverBaseResult.md#fetchnextpage)
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchPreviousPage`](InfiniteQueryObserverBaseResult.md#fetchpreviouspage)
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchStatus`](InfiniteQueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasNextPage`](InfiniteQueryObserverBaseResult.md#hasnextpage)
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasPreviousPage`](InfiniteQueryObserverBaseResult.md#haspreviouspage)
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isEnabled`](InfiniteQueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: false;
```
Defined in: [packages/query-core/src/types.ts:1135](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1135)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isError`](InfiniteQueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetched`](InfiniteQueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchedAfterMount`](InfiniteQueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetching`](InfiniteQueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingNextPage`](InfiniteQueryObserverBaseResult.md#isfetchingnextpage)
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingPreviousPage`](InfiniteQueryObserverBaseResult.md#isfetchingpreviouspage)
***
### isFetchNextPageError
```ts
isFetchNextPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1143](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1143)
Will be `true` if the query failed while fetching the next page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchNextPageError`](InfiniteQueryObserverBaseResult.md#isfetchnextpageerror)
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1144](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1144)
Will be `true` if the query failed while fetching the previous page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchPreviousPageError`](InfiniteQueryObserverBaseResult.md#isfetchpreviouspageerror)
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isInitialLoading`](InfiniteQueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: false;
```
Defined in: [packages/query-core/src/types.ts:1138](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1138)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoading`](InfiniteQueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: false;
```
Defined in: [packages/query-core/src/types.ts:1139](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1139)
Will be `true` if the query failed while fetching for the first time.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoadingError`](InfiniteQueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPaused`](InfiniteQueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: false;
```
Defined in: [packages/query-core/src/types.ts:1137](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1137)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPending`](InfiniteQueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: true;
```
Defined in: [packages/query-core/src/types.ts:1142](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1142)
Will be `true` if the data shown is the placeholder data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPlaceholderData`](InfiniteQueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: false;
```
Defined in: [packages/query-core/src/types.ts:1140](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1140)
Will be `true` if the query failed while refetching.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetchError`](InfiniteQueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetching`](InfiniteQueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isStale`](InfiniteQueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: true;
```
Defined in: [packages/query-core/src/types.ts:1141](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1141)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isSuccess`](InfiniteQueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`refetch`](InfiniteQueryObserverBaseResult.md#refetch)
***
### status
```ts
status: "success";
```
Defined in: [packages/query-core/src/types.ts:1145](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1145)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`status`](InfiniteQueryObserverBaseResult.md#status)

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@@ -0,0 +1,600 @@
---
id: InfiniteQueryObserverRefetchErrorResult
title: InfiniteQueryObserverRefetchErrorResult
---
Defined in: [packages/query-core/src/types.ts:1096](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1096)
## Extends
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)\<`TData`, `TError`\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: TData;
```
Defined in: [packages/query-core/src/types.ts:1100](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1100)
The last successfully resolved data for the query.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`data`](InfiniteQueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`dataUpdatedAt`](InfiniteQueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: TError;
```
Defined in: [packages/query-core/src/types.ts:1101](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1101)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`error`](InfiniteQueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdateCount`](InfiniteQueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdatedAt`](InfiniteQueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureCount`](InfiniteQueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureReason`](InfiniteQueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchNextPage`](InfiniteQueryObserverBaseResult.md#fetchnextpage)
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchPreviousPage`](InfiniteQueryObserverBaseResult.md#fetchpreviouspage)
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchStatus`](InfiniteQueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasNextPage`](InfiniteQueryObserverBaseResult.md#hasnextpage)
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasPreviousPage`](InfiniteQueryObserverBaseResult.md#haspreviouspage)
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isEnabled`](InfiniteQueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: true;
```
Defined in: [packages/query-core/src/types.ts:1102](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1102)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isError`](InfiniteQueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetched`](InfiniteQueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchedAfterMount`](InfiniteQueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetching`](InfiniteQueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingNextPage`](InfiniteQueryObserverBaseResult.md#isfetchingnextpage)
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingPreviousPage`](InfiniteQueryObserverBaseResult.md#isfetchingpreviouspage)
***
### isFetchNextPageError
```ts
isFetchNextPageError: boolean;
```
Defined in: [packages/query-core/src/types.ts:1028](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1028)
Will be `true` if the query failed while fetching the next page.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchNextPageError`](InfiniteQueryObserverBaseResult.md#isfetchnextpageerror)
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: boolean;
```
Defined in: [packages/query-core/src/types.ts:1036](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1036)
Will be `true` if the query failed while fetching the previous page.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchPreviousPageError`](InfiniteQueryObserverBaseResult.md#isfetchpreviouspageerror)
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isInitialLoading`](InfiniteQueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: false;
```
Defined in: [packages/query-core/src/types.ts:1104](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1104)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoading`](InfiniteQueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: false;
```
Defined in: [packages/query-core/src/types.ts:1105](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1105)
Will be `true` if the query failed while fetching for the first time.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoadingError`](InfiniteQueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPaused`](InfiniteQueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: false;
```
Defined in: [packages/query-core/src/types.ts:1103](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1103)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPending`](InfiniteQueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: false;
```
Defined in: [packages/query-core/src/types.ts:1108](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1108)
Will be `true` if the data shown is the placeholder data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPlaceholderData`](InfiniteQueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: true;
```
Defined in: [packages/query-core/src/types.ts:1106](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1106)
Will be `true` if the query failed while refetching.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetchError`](InfiniteQueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetching`](InfiniteQueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isStale`](InfiniteQueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: false;
```
Defined in: [packages/query-core/src/types.ts:1107](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1107)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isSuccess`](InfiniteQueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`refetch`](InfiniteQueryObserverBaseResult.md#refetch)
***
### status
```ts
status: "error";
```
Defined in: [packages/query-core/src/types.ts:1109](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1109)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`status`](InfiniteQueryObserverBaseResult.md#status)

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@@ -0,0 +1,600 @@
---
id: InfiniteQueryObserverSuccessResult
title: InfiniteQueryObserverSuccessResult
---
Defined in: [packages/query-core/src/types.ts:1112](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1112)
## Extends
- [`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md)\<`TData`, `TError`\>
## Type Parameters
### TData
`TData` = `unknown`
### TError
`TError` = [`DefaultError`](../type-aliases/DefaultError.md)
## Properties
### data
```ts
data: TData;
```
Defined in: [packages/query-core/src/types.ts:1116](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1116)
The last successfully resolved data for the query.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`data`](InfiniteQueryObserverBaseResult.md#data)
***
### dataUpdatedAt
```ts
dataUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:775](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L775)
The timestamp for when the query most recently returned the `status` as `"success"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`dataUpdatedAt`](InfiniteQueryObserverBaseResult.md#dataupdatedat)
***
### error
```ts
error: null;
```
Defined in: [packages/query-core/src/types.ts:1117](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1117)
The error object for the query, if an error was thrown.
- Defaults to `null`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`error`](InfiniteQueryObserverBaseResult.md#error)
***
### errorUpdateCount
```ts
errorUpdateCount: number;
```
Defined in: [packages/query-core/src/types.ts:799](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L799)
The sum of all errors.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdateCount`](InfiniteQueryObserverBaseResult.md#errorupdatecount)
***
### errorUpdatedAt
```ts
errorUpdatedAt: number;
```
Defined in: [packages/query-core/src/types.ts:784](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L784)
The timestamp for when the query most recently returned the `status` as `"error"`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`errorUpdatedAt`](InfiniteQueryObserverBaseResult.md#errorupdatedat)
***
### failureCount
```ts
failureCount: number;
```
Defined in: [packages/query-core/src/types.ts:790](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L790)
The failure count for the query.
- Incremented every time the query fails.
- Reset to `0` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureCount`](InfiniteQueryObserverBaseResult.md#failurecount)
***
### failureReason
```ts
failureReason: TError | null;
```
Defined in: [packages/query-core/src/types.ts:795](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L795)
The failure reason for the query retry.
- Reset to `null` when the query succeeds.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`failureReason`](InfiniteQueryObserverBaseResult.md#failurereason)
***
### fetchNextPage()
```ts
fetchNextPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1008](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1008)
This function allows you to fetch the next "page" of results.
#### Parameters
##### options?
[`FetchNextPageOptions`](FetchNextPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchNextPage`](InfiniteQueryObserverBaseResult.md#fetchnextpage)
***
### fetchPreviousPage()
```ts
fetchPreviousPage: (options?) => Promise<InfiniteQueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:1014](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1014)
This function allows you to fetch the previous "page" of results.
#### Parameters
##### options?
[`FetchPreviousPageOptions`](FetchPreviousPageOptions.md)
#### Returns
`Promise`\<[`InfiniteQueryObserverResult`](../type-aliases/InfiniteQueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchPreviousPage`](InfiniteQueryObserverBaseResult.md#fetchpreviouspage)
***
### fetchStatus
```ts
fetchStatus: FetchStatus;
```
Defined in: [packages/query-core/src/types.ts:889](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L889)
The fetch status of the query.
- `fetching`: Is `true` whenever the queryFn is executing, which includes initial `pending` as well as background refetch.
- `paused`: The query wanted to fetch, but has been `paused`.
- `idle`: The query is not fetching.
- See [Network Mode](https://tanstack.com/query/latest/docs/framework/react/guides/network-mode) for more information.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`fetchStatus`](InfiniteQueryObserverBaseResult.md#fetchstatus)
***
### hasNextPage
```ts
hasNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1020](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1020)
Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasNextPage`](InfiniteQueryObserverBaseResult.md#hasnextpage)
***
### hasPreviousPage
```ts
hasPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1024](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1024)
Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`hasPreviousPage`](InfiniteQueryObserverBaseResult.md#haspreviouspage)
***
### isEnabled
```ts
isEnabled: boolean;
```
Defined in: [packages/query-core/src/types.ts:867](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L867)
`true` if this observer is enabled, `false` otherwise.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isEnabled`](InfiniteQueryObserverBaseResult.md#isenabled)
***
### isError
```ts
isError: false;
```
Defined in: [packages/query-core/src/types.ts:1118](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1118)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query attempt resulted in an error.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isError`](InfiniteQueryObserverBaseResult.md#iserror)
***
### isFetched
```ts
isFetched: boolean;
```
Defined in: [packages/query-core/src/types.ts:808](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L808)
Will be `true` if the query has been fetched.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetched`](InfiniteQueryObserverBaseResult.md#isfetched)
***
### isFetchedAfterMount
```ts
isFetchedAfterMount: boolean;
```
Defined in: [packages/query-core/src/types.ts:813](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L813)
Will be `true` if the query has been fetched after the component mounted.
- This property can be used to not show any previously cached data.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchedAfterMount`](InfiniteQueryObserverBaseResult.md#isfetchedaftermount)
***
### isFetching
```ts
isFetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:818](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L818)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- `true` whenever the `queryFn` is executing, which includes initial `pending` as well as background refetch.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetching`](InfiniteQueryObserverBaseResult.md#isfetching)
***
### isFetchingNextPage
```ts
isFetchingNextPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1032](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1032)
Will be `true` while fetching the next page with `fetchNextPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingNextPage`](InfiniteQueryObserverBaseResult.md#isfetchingnextpage)
***
### isFetchingPreviousPage
```ts
isFetchingPreviousPage: boolean;
```
Defined in: [packages/query-core/src/types.ts:1040](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1040)
Will be `true` while fetching the previous page with `fetchPreviousPage`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchingPreviousPage`](InfiniteQueryObserverBaseResult.md#isfetchingpreviouspage)
***
### isFetchNextPageError
```ts
isFetchNextPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1123](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1123)
Will be `true` if the query failed while fetching the next page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchNextPageError`](InfiniteQueryObserverBaseResult.md#isfetchnextpageerror)
***
### isFetchPreviousPageError
```ts
isFetchPreviousPageError: false;
```
Defined in: [packages/query-core/src/types.ts:1124](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1124)
Will be `true` if the query failed while fetching the previous page.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isFetchPreviousPageError`](InfiniteQueryObserverBaseResult.md#isfetchpreviouspageerror)
***
### ~~isInitialLoading~~
```ts
isInitialLoading: boolean;
```
Defined in: [packages/query-core/src/types.ts:836](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L836)
#### Deprecated
`isInitialLoading` is being deprecated in favor of `isLoading`
and will be removed in the next major version.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isInitialLoading`](InfiniteQueryObserverBaseResult.md#isinitialloading)
***
### isLoading
```ts
isLoading: false;
```
Defined in: [packages/query-core/src/types.ts:1120](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1120)
Is `true` whenever the first fetch for a query is in-flight.
- Is the same as `isFetching && isPending`.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoading`](InfiniteQueryObserverBaseResult.md#isloading)
***
### isLoadingError
```ts
isLoadingError: false;
```
Defined in: [packages/query-core/src/types.ts:1121](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1121)
Will be `true` if the query failed while fetching for the first time.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isLoadingError`](InfiniteQueryObserverBaseResult.md#isloadingerror)
***
### isPaused
```ts
isPaused: boolean;
```
Defined in: [packages/query-core/src/types.ts:841](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L841)
A derived boolean from the `fetchStatus` variable, provided for convenience.
- The query wanted to fetch, but has been `paused`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPaused`](InfiniteQueryObserverBaseResult.md#ispaused)
***
### isPending
```ts
isPending: false;
```
Defined in: [packages/query-core/src/types.ts:1119](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1119)
Will be `pending` if there's no cached data and no query attempt was finished yet.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPending`](InfiniteQueryObserverBaseResult.md#ispending)
***
### isPlaceholderData
```ts
isPlaceholderData: false;
```
Defined in: [packages/query-core/src/types.ts:1126](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1126)
Will be `true` if the data shown is the placeholder data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isPlaceholderData`](InfiniteQueryObserverBaseResult.md#isplaceholderdata)
***
### isRefetchError
```ts
isRefetchError: false;
```
Defined in: [packages/query-core/src/types.ts:1122](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1122)
Will be `true` if the query failed while refetching.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetchError`](InfiniteQueryObserverBaseResult.md#isrefetcherror)
***
### isRefetching
```ts
isRefetching: boolean;
```
Defined in: [packages/query-core/src/types.ts:854](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L854)
Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending`.
- Is the same as `isFetching && !isPending`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isRefetching`](InfiniteQueryObserverBaseResult.md#isrefetching)
***
### isStale
```ts
isStale: boolean;
```
Defined in: [packages/query-core/src/types.ts:858](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L858)
Will be `true` if the data in the cache is invalidated or if the data is older than the given `staleTime`.
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isStale`](InfiniteQueryObserverBaseResult.md#isstale)
***
### isSuccess
```ts
isSuccess: true;
```
Defined in: [packages/query-core/src/types.ts:1125](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1125)
A derived boolean from the `status` variable, provided for convenience.
- `true` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`isSuccess`](InfiniteQueryObserverBaseResult.md#issuccess)
***
### refetch()
```ts
refetch: (options?) => Promise<QueryObserverResult<TData, TError>>;
```
Defined in: [packages/query-core/src/types.ts:871](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L871)
A function to manually refetch the query.
#### Parameters
##### options?
[`RefetchOptions`](RefetchOptions.md)
#### Returns
`Promise`\<[`QueryObserverResult`](../type-aliases/QueryObserverResult.md)\<`TData`, `TError`\>\>
#### Inherited from
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`refetch`](InfiniteQueryObserverBaseResult.md#refetch)
***
### status
```ts
status: "success";
```
Defined in: [packages/query-core/src/types.ts:1127](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1127)
The status of the query.
- Will be:
- `pending` if there's no cached data and no query attempt was finished yet.
- `error` if the query attempt resulted in an error.
- `success` if the query has received a response with no errors and is ready to display its data.
#### Overrides
[`InfiniteQueryObserverBaseResult`](InfiniteQueryObserverBaseResult.md).[`status`](InfiniteQueryObserverBaseResult.md#status)

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