215 lines
3.6 KiB
Markdown
215 lines
3.6 KiB
Markdown
---
|
|
id: OnlineManager
|
|
title: OnlineManager
|
|
---
|
|
|
|
Defined in: [packages/query-core/src/onlineManager.ts:15](https://github.com/TanStack/query/blob/main/packages/query-core/src/onlineManager.ts#L15)
|
|
|
|
The `OnlineManager` manages the online state within TanStack Query. It can
|
|
be used to change the default event listeners or to manually change the
|
|
online state.
|
|
|
|
By default, the `onlineManager` assumes an active network connection, and
|
|
listens to the `online` and `offline` events on the `window` object to
|
|
detect changes.
|
|
|
|
## 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
|
|
```
|
|
|
|
***
|
|
|
|
### isOnline()
|
|
|
|
```ts
|
|
isOnline(): boolean;
|
|
```
|
|
|
|
Defined in: [packages/query-core/src/onlineManager.ts:109](https://github.com/TanStack/query/blob/main/packages/query-core/src/onlineManager.ts#L109)
|
|
|
|
`isOnline` can be used to get the current online state.
|
|
|
|
#### Returns
|
|
|
|
`boolean`
|
|
|
|
***
|
|
|
|
### onSubscribe()
|
|
|
|
```ts
|
|
protected onSubscribe(): void;
|
|
```
|
|
|
|
Defined in: [packages/query-core/src/onlineManager.ts:44](https://github.com/TanStack/query/blob/main/packages/query-core/src/onlineManager.ts#L44)
|
|
|
|
#### Returns
|
|
|
|
`void`
|
|
|
|
#### Overrides
|
|
|
|
```ts
|
|
Subscribable.onSubscribe
|
|
```
|
|
|
|
***
|
|
|
|
### onUnsubscribe()
|
|
|
|
```ts
|
|
protected onUnsubscribe(): void;
|
|
```
|
|
|
|
Defined in: [packages/query-core/src/onlineManager.ts:50](https://github.com/TanStack/query/blob/main/packages/query-core/src/onlineManager.ts#L50)
|
|
|
|
#### Returns
|
|
|
|
`void`
|
|
|
|
#### Overrides
|
|
|
|
```ts
|
|
Subscribable.onUnsubscribe
|
|
```
|
|
|
|
***
|
|
|
|
### setEventListener()
|
|
|
|
```ts
|
|
setEventListener(setup): void;
|
|
```
|
|
|
|
Defined in: [packages/query-core/src/onlineManager.ts:75](https://github.com/TanStack/query/blob/main/packages/query-core/src/onlineManager.ts#L75)
|
|
|
|
`setEventListener` can be used to set a custom event listener that will
|
|
be used to determine the online state. The provided `setup` function
|
|
receives a `setOnline` callback that should be called with a `boolean`
|
|
whenever the online state changes.
|
|
|
|
#### Parameters
|
|
|
|
##### setup
|
|
|
|
`SetupFn`
|
|
|
|
#### Returns
|
|
|
|
`void`
|
|
|
|
#### Example
|
|
|
|
```ts
|
|
import NetInfo from '@react-native-community/netinfo'
|
|
import { onlineManager } from '@tanstack/query-core'
|
|
|
|
onlineManager.setEventListener((setOnline) => {
|
|
return NetInfo.addEventListener((state) => {
|
|
setOnline(!!state.isConnected)
|
|
})
|
|
})
|
|
```
|
|
|
|
***
|
|
|
|
### setOnline()
|
|
|
|
```ts
|
|
setOnline(online): void;
|
|
```
|
|
|
|
Defined in: [packages/query-core/src/onlineManager.ts:95](https://github.com/TanStack/query/blob/main/packages/query-core/src/onlineManager.ts#L95)
|
|
|
|
`setOnline` can be used to manually set the online state.
|
|
|
|
#### Parameters
|
|
|
|
##### online
|
|
|
|
`boolean`
|
|
|
|
#### Returns
|
|
|
|
`void`
|
|
|
|
#### Example
|
|
|
|
```ts
|
|
import { onlineManager } from '@tanstack/query-core'
|
|
|
|
// Set to online
|
|
onlineManager.setOnline(true)
|
|
|
|
// Set to offline
|
|
onlineManager.setOnline(false)
|
|
```
|
|
|
|
***
|
|
|
|
### 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
|
|
```
|