js获取近半年时间

// 获取近半年时间
getNowdate(time = 6) {
  let date = new Date()
  let year = date.getFullYear()
  let month = date.getMonth()
  let sdate = date.getDate()
  let olddate = new Date(year, month - time, sdate).getTime()
  return format(olddate, 'yyyy-MM-dd')
}