that’s correct, but
start is constrained (read: supported) to be at the start of the day. Every other value is not supported by the current UI. The
end property is there just for convenience, read the
duration paragraph just below the text you pointed out:
duration: is always in working days (emphasis mine). If there are holidays on the calendar (see below for holydays configuration) the end date will take it into account. Actually the end date is always recomputed using “start” and “duration”, and it is supplied for comfort
In addition, read the comments at the following URL: https://roberto.open-lab.com/2017/04/05/new-gantt-editor-release-the-best-ever/
I’m copying here a couple of relevant comments:
Q: Can you provide duration entry in decimals. e.g. 10.5 days. Currently it is rounding the duration.
A: Unfortunately duration is always integer in days.
Q: Hello, I must say nice software you have. can we get a version of the software the start and end timeline estimated in hours and minutes instead of calendar date?
A: Yes, there is a PRO version. Contact me rbicchierai a t twproject d o t com