js怎么处理后台返回的时间变成，小时前，分钟前，刚刚

• 直接使用的地方引入此方法就行

export const getTimer = stringTime => {
  if (!stringTime) return
  var minute = 1000 * 60
  var hour = minute * 60
  var day = hour * 24
  var week = day * 7
  var month = day * 30
  let timer = stringTime.replace(/-/g, '/')
  var time1 = new Date().getTime() //当前的时间戳
  var time2 = Date.parse(new Date(timer)) //指定时间的时间戳
  var time = time1 - time2
  var result = null
  if (time < 0) {
    alert('设置的时间不能早于当前时间！')
  } else if (time / month >= 1) {
    result = parseInt(time / month) + '月前'
  } else if (time / week >= 1) {
    result = parseInt(time / week) + '周前'
  } else if (time / day >= 1) {
    result = parseInt(time / day) + '天前'
  } else if (time / hour >= 1) {
    result = parseInt(time / hour) + '小时前'
  } else if (time / minute >= 1) {
    result = parseInt(time / minute) + '分钟前'
  } else {
    result = '刚刚发布！'
  }
  return result
}