In angular 6 i have many custom function so can call that function after add new task with this method onTimeRangeSelected. Example Like Below :
onTimeRangeSelected: function (args) {
var dp = this;
DayPilot.Modal.prompt("Create a new task:", "").then(function(modal) {
dp.clearSelection();
if (!modal.result) { return; }
dp.events.add(new DayPilot.Event({
start: args.start,
end: args.end,
id: DayPilot.guid(),
resource: args.resource,
text: modal.result
}));
});
this.Callfunctin();
},