// JS获取两个日期之间相差的天数
function getDaysBetween(dateString1, dateString2) {
  var startDate = Date.parse(dateString1)
  var endDate = Date.parse(dateString2)
  var days = (endDate - startDate) / (1 * 24 * 60 * 60 * 1000)
  // alert(days);
  return days
}

// 日期格式化
function formatDate(cellValue) {
  if (cellValue === null || cellValue === '') return ''
  var date = new Date(cellValue)
  var year = date.getFullYear()
  var month = date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1
  var day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()

  return year + '-' + month + '-' + day
}