useLiveSuspenseQuery | TanStack DB 日本語

Call Signature

function useLiveSuspenseQuery<TContext>(queryFn, deps?): object;

Defined in: useLiveSuspenseQuery.ts:151

Create a live query with React Suspense support

Type Parameters

TContext

TContext extends Context

Parameters

queryFn

(q) => QueryBuilder<TContext>

Query function that defines what data to fetch

deps?

unknown[]

Deprecated array of dependencies that trigger query re-execution when changed

Returns

object

Object with reactive data and state - data is guaranteed to be defined

collection

collection: Collection<{ [K in string | number | symbol]: ResultValue<TContext>[K] }, string | number, {
}>;

data

data: InferResultType<TContext>;

state

state: Map<string | number, { [K in string | number | symbol]: ResultValue<TContext>[K] }>;

Throws

Promise when data is loading (caught by Suspense boundary)

Throws

Error when collection fails (caught by Error boundary)

Examples

// Basic usage with Suspense
function TodoList() {
  const { data } = useLiveSuspenseQuery({
    query: (q) =>
      q.from({ todos: todosCollection })
       .where(({ todos }) => eq(todos.completed, false))
       .select(({ todos }) => ({ id: todos.id, text: todos.text }))
  })

  return (
    <ul>
      {data.map(todo => <li key={todo.id}>{todo.text}</li>)}
    </ul>
  )
}

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <TodoList />
    </Suspense>
  )
}

// Single result query
const { data } = useLiveSuspenseQuery(
  (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => eq(todos.id, 1))
         .findOne()
)
// data is guaranteed to be the single item (or undefined if not found)

// Structured captured values are included in derived query identity and trigger re-suspension
const { data } = useLiveSuspenseQuery({
  query: (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => gt(todos.priority, minPriority)),
})

// With Error boundary
function App() {
  return (
    <ErrorBoundary fallback={<div>Error loading data</div>}>
      <Suspense fallback={<div>Loading...</div>}>
        <TodoList />
      </Suspense>
    </ErrorBoundary>
  )
}

Remarks

Important: This hook does NOT support disabled queries (returning undefined/null). Following TanStack Query's useSuspenseQuery design, the query callback must always return a valid query, collection, or config object.

❌ This will cause a type error:

useLiveSuspenseQuery(
  (q) => userId ? q.from({ users }) : undefined  // ❌ Error!
)

✅ Use conditional rendering instead:

function Profile({ userId }: { userId: string }) {
  const { data } = useLiveSuspenseQuery({
    query: (q) => q.from({ users }).where(({ users }) => eq(users.id, userId)),
  })
  return <div>{data.name}</div>
}

// In parent component:
{userId ? <Profile userId={userId} /> : <div>No user</div>}

✅ For optional inputs, conditionally render a component with complete query inputs:

{userId ? <Profile userId={userId} /> : <div>No user</div>}

Call Signature

function useLiveSuspenseQuery<TContext>(config): object;

Defined in: useLiveSuspenseQuery.ts:161

Create a live query with React Suspense support

Type Parameters

TContext

TContext extends Context

Parameters

config

UseLiveQueryConfig<TContext>

Returns

object

Object with reactive data and state - data is guaranteed to be defined

collection

collection: Collection<{ [K in string | number | symbol]: ResultValue<TContext>[K] }, string | number, {
}>;

data

data: InferResultType<TContext>;

state

state: Map<string | number, { [K in string | number | symbol]: ResultValue<TContext>[K] }>;

Throws

Promise when data is loading (caught by Suspense boundary)

Throws

Error when collection fails (caught by Error boundary)

Examples

// Basic usage with Suspense
function TodoList() {
  const { data } = useLiveSuspenseQuery({
    query: (q) =>
      q.from({ todos: todosCollection })
       .where(({ todos }) => eq(todos.completed, false))
       .select(({ todos }) => ({ id: todos.id, text: todos.text }))
  })

  return (
    <ul>
      {data.map(todo => <li key={todo.id}>{todo.text}</li>)}
    </ul>
  )
}

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <TodoList />
    </Suspense>
  )
}

// Single result query
const { data } = useLiveSuspenseQuery(
  (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => eq(todos.id, 1))
         .findOne()
)
// data is guaranteed to be the single item (or undefined if not found)

// Structured captured values are included in derived query identity and trigger re-suspension
const { data } = useLiveSuspenseQuery({
  query: (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => gt(todos.priority, minPriority)),
})

// With Error boundary
function App() {
  return (
    <ErrorBoundary fallback={<div>Error loading data</div>}>
      <Suspense fallback={<div>Loading...</div>}>
        <TodoList />
      </Suspense>
    </ErrorBoundary>
  )
}

Remarks

❌ This will cause a type error:

useLiveSuspenseQuery(
  (q) => userId ? q.from({ users }) : undefined  // ❌ Error!
)

✅ Use conditional rendering instead:

function Profile({ userId }: { userId: string }) {
  const { data } = useLiveSuspenseQuery({
    query: (q) => q.from({ users }).where(({ users }) => eq(users.id, userId)),
  })
  return <div>{data.name}</div>
}

// In parent component:
{userId ? <Profile userId={userId} /> : <div>No user</div>}

✅ For optional inputs, conditionally render a component with complete query inputs:

{userId ? <Profile userId={userId} /> : <div>No user</div>}

Call Signature

function useLiveSuspenseQuery<TContext>(config, deps?): object;

Defined in: useLiveSuspenseQuery.ts:170

Create a live query with React Suspense support

Type Parameters

TContext

TContext extends Context

Parameters

config

LiveQueryCollectionConfig<TContext>

deps?

unknown[]

Deprecated array of dependencies that trigger query re-execution when changed

Returns

object

Object with reactive data and state - data is guaranteed to be defined

collection

collection: Collection<{ [K in string | number | symbol]: ResultValue<TContext>[K] }, string | number, {
}>;

data

data: InferResultType<TContext>;

state

state: Map<string | number, { [K in string | number | symbol]: ResultValue<TContext>[K] }>;

Throws

Promise when data is loading (caught by Suspense boundary)

Throws

Error when collection fails (caught by Error boundary)

Examples

// Basic usage with Suspense
function TodoList() {
  const { data } = useLiveSuspenseQuery({
    query: (q) =>
      q.from({ todos: todosCollection })
       .where(({ todos }) => eq(todos.completed, false))
       .select(({ todos }) => ({ id: todos.id, text: todos.text }))
  })

  return (
    <ul>
      {data.map(todo => <li key={todo.id}>{todo.text}</li>)}
    </ul>
  )
}

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <TodoList />
    </Suspense>
  )
}

// Single result query
const { data } = useLiveSuspenseQuery(
  (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => eq(todos.id, 1))
         .findOne()
)
// data is guaranteed to be the single item (or undefined if not found)

// Structured captured values are included in derived query identity and trigger re-suspension
const { data } = useLiveSuspenseQuery({
  query: (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => gt(todos.priority, minPriority)),
})

// With Error boundary
function App() {
  return (
    <ErrorBoundary fallback={<div>Error loading data</div>}>
      <Suspense fallback={<div>Loading...</div>}>
        <TodoList />
      </Suspense>
    </ErrorBoundary>
  )
}

Remarks

❌ This will cause a type error:

useLiveSuspenseQuery(
  (q) => userId ? q.from({ users }) : undefined  // ❌ Error!
)

✅ Use conditional rendering instead:

function Profile({ userId }: { userId: string }) {
  const { data } = useLiveSuspenseQuery({
    query: (q) => q.from({ users }).where(({ users }) => eq(users.id, userId)),
  })
  return <div>{data.name}</div>
}

// In parent component:
{userId ? <Profile userId={userId} /> : <div>No user</div>}

✅ For optional inputs, conditionally render a component with complete query inputs:

{userId ? <Profile userId={userId} /> : <div>No user</div>}

Call Signature

function useLiveSuspenseQuery<TResult, TKey, TUtils>(liveQueryCollection): object;

Defined in: useLiveSuspenseQuery.ts:180

Create a live query with React Suspense support

Type Parameters

TResult

TResult extends object

TKey

TKey extends string | number

TUtils

TUtils extends Record<string, any>

Parameters

liveQueryCollection

Collection<TResult, TKey, TUtils, StandardSchemaV1<unknown, unknown>, TResult> & NonSingleResult

Returns

object

Object with reactive data and state - data is guaranteed to be defined

collection

collection: Collection<TResult, TKey, TUtils>;

data

data: TResult[];

state

state: Map<TKey, TResult>;

Throws

Promise when data is loading (caught by Suspense boundary)

Throws

Error when collection fails (caught by Error boundary)

Examples

// Basic usage with Suspense
function TodoList() {
  const { data } = useLiveSuspenseQuery({
    query: (q) =>
      q.from({ todos: todosCollection })
       .where(({ todos }) => eq(todos.completed, false))
       .select(({ todos }) => ({ id: todos.id, text: todos.text }))
  })

  return (
    <ul>
      {data.map(todo => <li key={todo.id}>{todo.text}</li>)}
    </ul>
  )
}

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <TodoList />
    </Suspense>
  )
}

// Single result query
const { data } = useLiveSuspenseQuery(
  (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => eq(todos.id, 1))
         .findOne()
)
// data is guaranteed to be the single item (or undefined if not found)

// Structured captured values are included in derived query identity and trigger re-suspension
const { data } = useLiveSuspenseQuery({
  query: (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => gt(todos.priority, minPriority)),
})

// With Error boundary
function App() {
  return (
    <ErrorBoundary fallback={<div>Error loading data</div>}>
      <Suspense fallback={<div>Loading...</div>}>
        <TodoList />
      </Suspense>
    </ErrorBoundary>
  )
}

Remarks

❌ This will cause a type error:

useLiveSuspenseQuery(
  (q) => userId ? q.from({ users }) : undefined  // ❌ Error!
)

✅ Use conditional rendering instead:

function Profile({ userId }: { userId: string }) {
  const { data } = useLiveSuspenseQuery({
    query: (q) => q.from({ users }).where(({ users }) => eq(users.id, userId)),
  })
  return <div>{data.name}</div>
}

// In parent component:
{userId ? <Profile userId={userId} /> : <div>No user</div>}

✅ For optional inputs, conditionally render a component with complete query inputs:

{userId ? <Profile userId={userId} /> : <div>No user</div>}

Call Signature

function useLiveSuspenseQuery<TResult, TKey, TUtils>(liveQueryCollection): object;

Defined in: useLiveSuspenseQuery.ts:193

Create a live query with React Suspense support

Type Parameters

TResult

TResult extends object

TKey

TKey extends string | number

TUtils

TUtils extends Record<string, any>

Parameters

liveQueryCollection

Collection<TResult, TKey, TUtils, StandardSchemaV1<unknown, unknown>, TResult> & SingleResult

Returns

object

Object with reactive data and state - data is guaranteed to be defined

collection

collection: Collection<TResult, TKey, TUtils, StandardSchemaV1<unknown, unknown>, TResult> & SingleResult;

data

data: TResult | undefined;

state

state: Map<TKey, TResult>;

Throws

Promise when data is loading (caught by Suspense boundary)

Throws

Error when collection fails (caught by Error boundary)

Examples

// Basic usage with Suspense
function TodoList() {
  const { data } = useLiveSuspenseQuery({
    query: (q) =>
      q.from({ todos: todosCollection })
       .where(({ todos }) => eq(todos.completed, false))
       .select(({ todos }) => ({ id: todos.id, text: todos.text }))
  })

  return (
    <ul>
      {data.map(todo => <li key={todo.id}>{todo.text}</li>)}
    </ul>
  )
}

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <TodoList />
    </Suspense>
  )
}

// Single result query
const { data } = useLiveSuspenseQuery(
  (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => eq(todos.id, 1))
         .findOne()
)
// data is guaranteed to be the single item (or undefined if not found)

// Structured captured values are included in derived query identity and trigger re-suspension
const { data } = useLiveSuspenseQuery({
  query: (q) => q.from({ todos: todosCollection })
         .where(({ todos }) => gt(todos.priority, minPriority)),
})

// With Error boundary
function App() {
  return (
    <ErrorBoundary fallback={<div>Error loading data</div>}>
      <Suspense fallback={<div>Loading...</div>}>
        <TodoList />
      </Suspense>
    </ErrorBoundary>
  )
}

Remarks

❌ This will cause a type error:

useLiveSuspenseQuery(
  (q) => userId ? q.from({ users }) : undefined  // ❌ Error!
)

✅ Use conditional rendering instead:

function Profile({ userId }: { userId: string }) {
  const { data } = useLiveSuspenseQuery({
    query: (q) => q.from({ users }).where(({ users }) => eq(users.id, userId)),
  })
  return <div>{data.name}</div>
}

// In parent component:
{userId ? <Profile userId={userId} /> : <div>No user</div>}

✅ For optional inputs, conditionally render a component with complete query inputs:

{userId ? <Profile userId={userId} /> : <div>No user</div>}