> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/expo/expo/llms.txt
> Use this file to discover all available pages before exploring further.

# expo-background-task

> Run tasks in the background on Android and iOS

# expo-background-task

**Version:** 55.0.6

Expo Android and iOS module for Background Task APIs. Execute JavaScript code in the background even when the app is not active.

## Installation

```bash theme={null}
npx expo install expo-background-task expo-task-manager
```

## Usage

```typescript theme={null}
import * as BackgroundTask from 'expo-background-task';
import * as TaskManager from 'expo-task-manager';

const TASK_NAME = 'background-task';

TaskManager.defineTask(TASK_NAME, async () => {
  // Background work here
  console.log('Background task executed');
  return BackgroundTask.BackgroundTaskResult.Success;
});

await BackgroundTask.registerTaskAsync(TASK_NAME);
```

## API Reference

### Methods

<ParamField path="registerTaskAsync(taskName, options)" type="(taskName: string, options?: BackgroundTaskOptions) => Promise<void>">
  Registers background task
</ParamField>

<ParamField path="unregisterTaskAsync(taskName)" type="(taskName: string) => Promise<void>">
  Unregisters background task
</ParamField>

## Platform Support

| Platform | Supported |
| -------- | --------- |
| iOS      | ✅         |
| Android  | ✅         |
| Web      | ❌         |

## Resources

* [Official Documentation](https://docs.expo.dev/versions/latest/sdk/background-task/)
* [GitHub Repository](https://github.com/expo/expo/tree/main/packages/expo-background-task)