let rruleString = "FREQ=WEEKLY;INTERVAL=1;WKST=MO;DTSTART=20190112T150000Z;DTEND=20120112T150000Z;BYDAY=MO,TU,WE,TH,FR"
if let rule = RRuleJS(rruleString: rruleString) {
  let _ = rule.allOccurrences()
  // first occurrence from the date specified
  let _ = rule.after(new Date(), include: true)
  // if the time has passed with-in the day, if include=true it would still return the day, otherwise it wouldn't
}