How to debug Google Apps Script (aka where does Logger.log log to?)

Question

In Google Sheets, you can add some scripting functionality. I\'m adding something for the onEdit event, but I can\'t tell if it\'s working. As far as I can tell

Answer 1

As far as I can tell, you can't debug a live event from google docs, so you have to do it from the debugger, which is pointless since the event argument passed to my onEdit() function will always be undefined if I run it from the Script Editor.

True - so define the event argument yourself for debugging. See How can I test a trigger function in GAS?

I was trying to use the Logger.log method to log some data whenever the onEdit function gets called, but this too seems like it only works when run from the Script Editor. When I run it from the Script Editor, I can view the logs by going to View->Logs...

True again, but there is help. Peter Hermann's BetterLog library will redirect all logs to a spreadsheet, enabling logging even from code that is not attached to an instance of the editor / debugger.

If you're coding in a spreadsheet-contained script, for example, you can add just this one line to the top of your script file, and all logs will go to a "Logs" sheet in the spreadsheet. No other code necessary, just use Logger.log() as you usually would:

Logger = BetterLog.useSpreadsheet();