> ## Documentation Index
> Fetch the complete documentation index at: https://rive.app/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Listener

Represents a listener callback that can observe changes on an object.
See [Property addListener](/scripting/api-reference/data-value/property#addlistener) and [PropertyTrigger addListener](/scripting/api-reference/data-value/property-trigger#addlistener).