What am I doing wrong when using onSelectionChange

Question

I found this trigger onSelectionChange(e) on developers.google.com it should set background to red if a single empty cell is selected. I\'m not getting that result with just

Answer 1

Use the legacy runtime, not the V8 runtime. With V8 runtime in my case sometimes it is triggered, sometimes not. There are general problems with trigger executions in V8, see https://issuetracker.google.com/issues/147016387