Yes, with widget content it is possible to display conditionally. Your extension will still be rendered, so it will just be up to you to render or not render display content and control the vertical height taken. The platform should minimize any screen real estate taken up by widgets without content. If you are doing Dynamic Content blocks for the Composable Dashboard, those can only display conditionally in the frameless target area as to not impact the layout of the rest of the content blocks when content is not displayed at runtime. If your content doesn't have visual content and only runs conditionally to open a modal or redirect a user, then outside of widgets we would recommend Application Outlets.