API Reference > imodeljs-frontend > Views > Viewport > isDisposed isDisposed AccessorReadOnly Returns true if this Viewport's Viewport.dispose method has been invoked. It is an error to attempt to interact with a disposed Viewport. Typically a ScreenViewport becomes disposed as a result of a call to ViewManager.dropViewport, often indirectly through the unmounting of a nine-zone UI's ViewportComponent when, e.g., switching front-stages. isDisposed: boolean Returns - boolean Defined in core/frontend/src/Viewport.ts Line 515 Last Updated: 12 June, 2024