The isEmpty() method returns true if there are no events in the calendar column.
DayPilot.Column.events.isEmpty()Returns true if there are no events in the column; otherwise it returns false.
const dp = new DayPilot.Calendar("dp", {
// ...
});
dp.init();
const noEvents = dp.columns.find(DayPilot.Date.today()).events.isEmpty();DayPilot.Column.events.forRange()