vue计算某个日期加几天后的日期

addDate(date,days){
  var dates = new Date(date)
  dates.setDate(dates.getDate()+days)
  var year = dates.getFullYear()
  var month = dates.getMonth()+1
  var day = dates.getDate()
  if(month<9)
  {
    month="0"+month
  }
  if(day<9)
  {
    day="0"+day
  }
  var time = year +'-'+month+'-'+day
  return time
},