API Reference > imodeljs-frontend > ModelState ModelState Classes for working with the state of Models in the frontend. See the learning articles. Classes Name Description DrawingModelState Represents the front-end state of a DrawingModel. GeometricModel2dState Represents the front-end state of a GeometricModel2d. GeometricModel3dState Represents the front-end state of a GeometricModel3d. GeometricModelState Represents the front-end state of a GeometricModel. ModelState Represents the front-end state of a Model. PhysicalModelState Represents the front-end state of a PhysicalModel. SectionDrawingModelState Represents the front-end state of a SectionDrawingModel. SheetModelState Represents the front-end state of a SheetModel. SpatialLocationModelState Represents the front-end state of a SpatialLocationModel. SpatialModelState Represents the front-end state of a SpatialModel. Last Updated: 15 June, 2021