js 进行年月日时间差计算

// 时间差计算
function DateDiff (d1, d2, type) {
  let value
  switch (type) {
    case 'year':
      value = 365 * 24 * 60 * 60 * 1000 // 计算差多少年
      break
    case 'day':
      value = 24 * 60 * 60 * 1000 // 计算差多少天
      break
    default:
      return false
  }
  // const day = 24 * 60 * 60 * 1000
  try {
    const dateArr = d1.split('-')
    let checkDate = new Date()
    checkDate.setFullYear(dateArr[0], dateArr[1] - 1, dateArr[2])
    const checkTime = checkDate.getTime()
    // d2
    const dateArr2 = d2.split('-')
    const checkDate2 = new Date()
    checkDate2.setFullYear(dateArr2[0], dateArr2[1] - 1, dateArr2[2])
    const checkTime2 = checkDate2.getTime()
    // 差
    const diff = (checkTime2 - checkTime) / value
    return parseInt(diff)
  } catch (e) {
    return false
  }
}