---
title: objectWillChange
framework: combine
role: symbol
role_heading: Instance Property
path: combine/observableobject/objectwillchange
---

# objectWillChange

A publisher that emits before the object has changed.

## Declaration

```swift
var objectWillChange: Self.ObjectWillChangePublisher { get }
```

## See Also

### Publishing changes

- [ObjectWillChangePublisher](combine/observableobject/objectwillchangepublisher.md)