By design widgets are initialized on demand when the application navigates to the corresponding View. For more information please see this topic
. This is done for performance reasons - initializing all the widgets from the beginning may slow down the general performance of your application.
Could you please provide more details about your scenario and if possible an example? What data you would like to extract from the ButtonGroup widget? Probably I would be able to suggest a workaround using custom data-attributes.
the Telerik team
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