js显示时间为多少天前

const minute = 1000 * 60
const hour = minute * 60
const day = hour * 24
// const halfamonth = day * 15
const month = day * 30
const timeAgo = time => {
  const dateTimeStamp = Date.parse(time);
  const now = new Date().getTime()
  const diffValue = now - dateTimeStamp
  let result = '';
  if (diffValue < 0) {
    return;
  }
  const monthC = diffValue / month
  // console.log(monthC)
  // var weekC = diffValue / (7 * day)
  const dayC = diffValue / day
  const hourC = diffValue / hour
  const minC = diffValue / minute
  if (monthC >1) {
    result = time
  } else if (dayC >= 1) {
    result = `${parseInt(dayC)}天前`
  } else if (hourC >= 1) {
    result = `${parseInt(hourC)}个小时前`
  } else if (minC >= 1) {
    result = `${parseInt(minC)}分钟前`
  } else result = '刚刚'
  return result
}

export { timeAgo }