I have been reading over the JavaScript Scripting documentation located at JavaScript Scripting - Automation | openHAB
On this webpage I found this: .changedSince(timestamp, serviceId) ⇒ Number
which I interpret as calling that method (if that is the right term) returns a number. That doesn’t seem to be correct, it returns a boolean.
The documentation on the GitHub site ItemHistory - Documentation is correct, or at least different, as it states a boolean return.
Just wanted to give some feedback on the documentation, which I found to be very helpful.