API Reference > imodeljs-backend > ElementAspects > OnAspectPropsArg OnAspectPropsArg Interface Beta Argument for the ElementAspect.onXxx static methods that supply the properties of an aspect to be inserted or updated. Extends OnAspectArg Properties Name Type Description props Readonly<ElementAspectProps> The new properties 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 25 Last Updated: 12 June, 2024