# Sandbox.UI.TransitionDesc.TimingFunction

```csharp
string TimingFunction
```

The timing or "easing" function. `transition-timing-function` CSS property.
Example values would be `ease`,  `ease-in`,  `ease-out` and  `ease-in-out`.

Declared in [Sandbox.UI.TransitionDesc](/api/Sandbox.UI.TransitionDesc).
Assembly: `Sandbox.Engine`.