Greetings,
I made a 62 seconds video to respect your time.
In a nutshell, the google.script.run.withSuccessHandler feature, when use in the context of a web app, appears to cache data and return data that was previously used, not the current data stored in the spreadsheet.
In the video I simply have a get data from "A1" in
code.gs that's passed to a button that alert(a1_value) and that alert shows not whats in the sheet right now but what was there initially, half an hour ago?
thank you for your time,
Antoine Dubuc