code: function datesOfToday () {
    const ret = {}
  
    ret.year = String(new Date().getFullYear())
    ret.month = prefix(String(new Date().getMonth()))
    ret.day = prefix(String(new Date().getDate()))
    ret.date = [ret.year, ret.month, ret.day].join('-')
  
    return ret
  }
docs: get today's date null -> null