react-native.md

id	title
react-native	React Native

React Query is designed to work out of the box with React Native, with the exception of the devtools, which are only supported with React DOM at this time.

There is a 3rd party Expo plugin which you can try: https://github.com/expo/dev-plugins/tree/main/packages/react-query

There is a 3rd party Flipper plugin which you can try: https://github.com/bgaleotti/react-query-native-devtools

There is a 3rd party Reactotron plugin which you can try: https://github.com/hsndmr/reactotron-react-query

If you would like to help us make the built-in devtools platform agnostic, please let us know!

Online status management

React Query already supports auto refetch on reconnect in web browser. To add this behavior in React Native you have to use React Query onlineManager as in the example below:

import NetInfo from '@react-native-community/netinfo'
import { onlineManager } from '@tanstack/react-query'

onlineManager.setEventListener((setOnline) => {
  return NetInfo.addEventListener((state) => {
    setOnline(!!state.isConnected)
  })
})

or

import { onlineManager } from '@tanstack/react-query'
import * as Network from 'expo-network'

onlineManager.setEventListener((setOnline) => {
  const eventSubscription = Network.addNetworkStateListener((state) => {
    setOnline(!!state.isConnected)
  })
  return eventSubscription.remove
})

Refetch on App focus

Instead of event listeners on window, React Native provides focus information through the AppState module. You can use the AppState "change" event to trigger an update when the app state changes to "active":

import { useEffect } from 'react'
import { AppState, Platform } from 'react-native'
import type { AppStateStatus } from 'react-native'
import { focusManager } from '@tanstack/react-query'

function onAppStateChange(status: AppStateStatus) {
  if (Platform.OS !== 'web') {
    focusManager.setFocused(status === 'active')
  }
}

useEffect(() => {
  const subscription = AppState.addEventListener('change', onAppStateChange)

  return () => subscription.remove()
}, [])

Refresh on Screen focus

In some situations, you may want to refetch the query when a React Native Screen is focused again. This custom hook will call the provided refetch function when the screen is focused again.

import React from 'react'
import { useFocusEffect } from '@react-navigation/native'

export function useRefreshOnFocus<T>(refetch: () => Promise<T>) {
  const firstTimeRef = React.useRef(true)

  useFocusEffect(
    React.useCallback(() => {
      if (firstTimeRef.current) {
        firstTimeRef.current = false
        return
      }

      refetch()
    }, [refetch]),
  )
}

In the above code, refetch is skipped the first time because useFocusEffect calls our callback on mount in addition to screen focus.

Disable queries on out of focus screens

subscribed option

If you don’t want certain queries to remain “live” while a screen is out of focus, you can use the subscribed prop on useQuery. This prop lets you control whether a query stays subscribed to updates. Combined with React Navigation’s useIsFocused, it allows you to seamlessly unsubscribe from queries when a screen isn’t in focus:

Example usage:

import React from 'react'
import { useIsFocused } from '@react-navigation/native'
import { useQuery } from '@tanstack/react-query'
import { Text } from 'react-native'

function MyComponent() {
  const isFocused = useIsFocused()

  const { dataUpdatedAt } = useQuery({
    queryKey: ['key'],
    queryFn: () => fetch(...),
    subscribed: isFocused,
  })

  return <Text>DataUpdatedAt: {dataUpdatedAt}</Text>
}

When subscribed is false, the query unsubscribes from updates and won’t trigger re-renders or fetch new data for that screen. Once it becomes true again (e.g., when the screen regains focus), the query re-subscribes and stays up to date.

PauseManagerProvider option

In case you want to disable updates to all queries in an out of focus screen, one alternative is to control them via PauseManager:

import React from 'react'
import { useIsFocused } from '@react-navigation/native'
import { PauseManager, PauseManagerProvider } from 'react-native'

function MyScreen() {
  const isFocused = useIsFocused()
  const pauseManager = useRef<PauseManager>(null)
  if (pauseManager.current === null) {
    pauseManager.current = new PauseManager(!isFocused)
  }
  useEffect(() => {
    pauseManager.current?.setPaused(!isFocused)
  }, [isFocused])

  return (
    <PauseManagerProvider pauseManager={pauseManager}>
      <MyComponent />
    </PauseManagerProvider>
  )
}