# transitionTimingFunction

> Determines how intermediate values are calculated for properties modified by a transition effect.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/6000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
StyleList<EasingFunction> transitionTimingFunction { get; set; }
```