---
title: NotificationQueue.NotificationCoalescing
framework: foundation
role: symbol
role_heading: Structure
path: foundation/notificationqueue/notificationcoalescing
---

# NotificationQueue.NotificationCoalescing

The constants that specify how notifications are coalesced.

## Declaration

```swift
struct NotificationCoalescing
```

## Overview

Overview These constants are used by the enqueue(_:postingStyle:coalesceMask:forModes:) method.

## Topics

### Constants

- [none](foundation/notificationqueue/notificationcoalescing/none.md)
- [onName](foundation/notificationqueue/notificationcoalescing/onname.md)
- [onSender](foundation/notificationqueue/notificationcoalescing/onsender.md)

### Initializers

- [init(rawValue:)](foundation/notificationqueue/notificationcoalescing/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [ExpressibleByArrayLiteral](swift/expressiblebyarrayliteral.md)
- [OptionSet](swift/optionset.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [SetAlgebra](swift/setalgebra.md)

## See Also

### Constants

- [NotificationQueue.PostingStyle](foundation/notificationqueue/postingstyle.md)