The multirange.get() method returns the current time range selection segments.
DayPilot.Scheduler.multirange.get()Returns an array of selection segments with the following properties:
start (DayPilot.Date) - selection segment start
end (DayPilot.Date) - selection segment end
resource (string | number) - selection segment resource ID
const selection = dp.multirange.get();Time range multi-selecting [doc.daypilot.org]