获取yyyy-MM-dd时间格式

getTime(target = []) {
  const endTime = new Date()
  const startTime = new Date()
  startTime.setTime(startTime.getTime() - 3600 * 1000 * 24 * 30)
  // 转换yyyy-MM-dd
  target = [this.dateFormat(startTime), this.dateFormat(endTime)]
  return target
},
dateFormat(dateData) {
  let date = new Date(dateData)
  let y = date.getFullYear()
  let m = date.getMonth() + 1
  m = m < 10 ? ('0' + m) : m
  let d = date.getDate()
  d = d < 10 ? ('0' + d) : d
  const time = y + '-' + m + '-' + d
  return time
}