I would like to have an Excel OfficeJS add-in shutdown event so that I can immediately abort JavaScript background operations and so that excel will then immediately exit. Using a background signa...
I just tried to use a timer to see if I could get a helpful error when inspecting the workbook.
Some of the time I'm getting an exception, which I could use to shutdown SignalR but even then its not terminating the runtime.
The other times my timers never run so I never get a chance to try to terminate SignalR.