The visibleStart() method returns the date/time at the start of the Scheduler grid.
DayPilotDayPilot.Scheduler.visibleStart()Returns a DayPilot.Date object.
To get the start of the current viewport, use DayPilot.Scheduler.getViewport().
const dp = new DayPilot.Scheduler("dp", {
// ...
});
dp.init();
const start = dp.visibleStart();DayPilot.Scheduler.visibleEnd()