API Reference > imodeljs-backend > ElementAspects > OnAspectIdArg OnAspectIdArg Interface Beta Argument for the ElementAspect.onXxx static methods that only supply the Id of the affected aspect. Extends OnAspectArg Properties Name Type Description aspectId string The Id of the aspect affected by this event Inherited properties Name Type Inherited from Description iModel IModelDb OnAspectArg The iModel for the aspect affected by this event. Defined in core/backend/src/ElementAspect.ts Line 32 Last Updated: 12 June, 2024