Is it possible to show connection (error) status in UI of jupyter Notebook?

My jupiter notebook reconnects just fine, but during connection is not available I would like to show in UI (dis)connection status. Normally I can see websocket logs in browser debug window, but for end user I would like to show connection status in UI element.

Have you tried JupyterLab? It shows a status in the bottom status bar, and opens a dialog if the connection drops.

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