# HandleEventTrickleDown(EventBase)

> Executes logic on this element during the TrickleDown phase, immediately after this element's TrickleDown callbacks. Calling StopPropagation will prevent further invocations of this method along the propagation path.

## Definition

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

```csharp
[EventInterest(EventInterestOptions.Inherit)]
protected virtual void HandleEventTrickleDown(EventBase evt)
```

### Parameters

**** (\[EventBase]\(/engine/6000.0/script-reference/unityengine/uielements/eventbase)): The event instance.

### Remarks

This method is designed to be overriden by subclasses. Use it to implement event handling without registering callbacks, which guarantees precedences of callbacks registered by users of the subclass.

Use [EventInterestAttribute](/engine/6000.0/script-reference/unityengine/uielements/eventinterestattribute.md) on this method to specify a range of event types that this method needs to receive. Events that don't fall into the specified types might not be sent to this method.