notifyManager

const notifyManager: object;

Defined in: packages/query-core/src/notifyManager.ts:154

Handles scheduling and batching callbacks in TanStack Query.

Type Declaration#

batch#

readonly batch: <T>(callback: () => T) => T;

Batches all updates scheduled inside the passed callback. This is mainly used internally to optimize query client updating. Batches can be nested; the queue is only flushed once the outermost batch call finishes. The return value of callback is passed through.

Type Parameters#

T#

T

Parameters#

callback#

() => T

The function to run in the batch.

Returns#

T

The return value of callback.

batchCalls#

readonly batchCalls: <T>(callback: BatchCallsCallback<T>) => BatchCallsCallback<T>;

All calls to the wrapped function will be batched.

Type Parameters#

T#

T extends unknown[]

Parameters#

callback#

BatchCallsCallback<T>

The function to wrap.

Returns#

BatchCallsCallback<T>

A function that schedules a call to callback with the given arguments.

schedule#

schedule: (callback: NotifyCallback) => void;

Schedules a function to be run on the next batch. By default, the batch is run with a setTimeout, but this can be configured via setScheduler.

Parameters#

callback#

NotifyCallback

Returns#

void

setBatchNotifyFunction#

readonly setBatchNotifyFunction: (fn: BatchNotifyFunction) => void;

Use this method to set a custom function to batch notifications together into a single tick. Framework adapters use this to plug in their own batching primitive, so that a single query update only triggers one re-render instead of one per subscriber.

Parameters#

fn#

BatchNotifyFunction

Receives a function that runs a batch of notifications and must call it.

Returns#

void

Example#

import { notifyManager } from '@tanstack/query-core'
import { batch } from 'solid-js'

notifyManager.setBatchNotifyFunction(batch)

setNotifyFunction#

readonly setNotifyFunction: (fn: NotifyFunction) => void;

Use this method to set a custom notify function. This can be used to for example wrap notifications with React.act while running tests.

Parameters#

fn#

NotifyFunction

Receives each notification callback and must call it.

Returns#

void

setScheduler#

readonly setScheduler: (fn: ScheduleFunction) => void;

Configures a custom callback that schedules when the next batch runs. The default behavior is setTimeout(callback, 0).

Parameters#

fn#

ScheduleFunction

Receives a callback that runs the next batch, and schedules it.

Returns#

void

Example#

import { notifyManager } from '@tanstack/query-core'

// Schedule batches in the next microtask
notifyManager.setScheduler(queueMicrotask)

// Schedule batches before the next frame is rendered
notifyManager.setScheduler(requestAnimationFrame)

// Schedule batches some time in the future
notifyManager.setScheduler((cb) => setTimeout(cb, 10))