You can also do this in the browser, using the beforeunload event https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event https://developer.

You can also do this in the browser, using the beforeunload event https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event https://developer.mozilla.org/en-US/docs/Web/API/Window/befo...