获取每个月的最后一天

  // 获取每月的最后一天函数
    getCurrentMonthLast(date) {
      var currentMonth = date.getMonth()

      var nextMonth = ++currentMonth

      var nextMonthFirstDay = new Date(date.getFullYear(), nextMonth, 1)

      var oneDay = 1000 * 60 * 60 * 24

      var lastTime = new Date(nextMonthFirstDay - oneDay)

      var month = parseInt(lastTime.getMonth() + 1)

      var day = lastTime.getDate()

      if (month < 10) {
        month = '0' + month
      }

      if (day < 10) {
        day = '0' + day
      }
      return day
    },