API Reference > imodeljs-backend > Elements > OnChildElementPropsArg OnChildElementPropsArg Interface Beta Argument for the Element.onChildXxx static methods that supply the properties of the child Element to be inserted or updated. Extends OnChildElementArg Properties Name Type Description childProps Readonly<ElementProps> The new properties of the child Element for this method. Inherited properties Name Type Inherited from Description iModel IModelDb OnChildElementArg The iModel for the Element affected by this method. parentId string OnChildElementArg Defined in core/backend/src/Element.ts Line 62 Last Updated: 12 June, 2024