API Reference > imodeljs-frontend > SelectionSet > SelectAddEvent SelectAddEvent Interface Passed to SelectionSet.onChanged event listeners when elements are added to the selection set. Properties Name Type Description added Id64Arg The Ids of the elements added to the set. set SelectionSet The affected SelectionSet. type Add Defined in core/frontend/src/SelectionSet.ts Line 29 Last Updated: 11 June, 2024