The azure-devops-extension-sdk has events that can be listened to for work items like onLoaded, onRefreshed, onUnloaded etc. But there's no event to listen to while the web page itself is being refreshed(navigating away). I need to stop the navigation action in case there are unsaved changes in my custom UI element. Azure DevOps does this inherently only in those cases where a standard backend field is used. My custom UI element (installed using an extension I developed) doesn't use any backend fields.
window.addEventListener function doesn't seem to work and neither did the window.beforeunload function.
