in src/utils.ts [128:147]
public static GET_DATE_PERIOD(values: any[]): ITimelineDatePeriodBase {
let startDate: Date;
let endDate: Date;
values = [].concat(values);
values.forEach((value: any) => {
const date: Date = Utils.PARSE_DATE(value);
if (date < startDate || startDate === undefined) {
startDate = date;
}
if (date > endDate || endDate === undefined) {
endDate = date;
}
});
return { startDate, endDate };
}