What activity type does a Declare OnChange activity require when calling or branching to other activities?

A Declare OnChange activity is specifically designed to respond to changes in a specific data item, allowing for actions to be triggered based on the updated value. When calling or branching to other activities from a Declare OnChange activity, it must utilize an OnChange activity type. This is because the OnChange activity is tailored to handle behavior that should occur as a result of a modification to the associated property.

Using the OnChange activity type ensures that the logic being executed is relevant to the context of the change event, which aligns with the core functionality of the Declare OnChange. This design promotes a structured approach in the application to respond dynamically to user inputs or property updates, maintaining clear and manageable rules.

The other activity types listed do not fit the purpose needed for responding to changes in property values. Activities like OnClick pertain to user-triggered events in the user interface, While When activities are used for decision-making logic within flow processing. Declare activities are aimed at defining data elements, so they do not serve the same function as an OnChange activity in the context of responding to change events.