---
title: value
framework: swiftui
role: symbol
role_heading: Instance Property
path: swiftui/transitionphase/value
---

# value

A value that can be used to multiply effects that are applied differently depending on the phase.

## Declaration

```swift
var value: Double { get }
```

## Return Value

Return Value Zero when in the identity case, -1.0 for willAppear, and 1.0 for didDisappear.

## See Also

### Getting phase characteristics

- [isIdentity](swiftui/transitionphase/isidentity.md)