获取某月第一天和最后一天的时间

    getTimeStamp(timeStamp) {
      let inDate = new Date(timeStamp);
      let year = inDate.getFullYear();
      let month = inDate.getMonth();
      var date = new Date();
      var currentMonth = date.getMonth();
      let startTime = new Date(year, month, 1).getTime();
      let endTime = "";
      if (month == currentMonth) {
       //当前月
       //如果当前日期是本月的情况下,那么将获取当天23:59:59的时间戳
        endTime =
          new Date(new Date().toLocaleDateString()).getTime() +
          24 * 60 * 60 * 1000 - 1; //当天23:59:59时间戳
        console.log("当前月");
      } else {
        //不是当前月的情况下
        endTime = new Date(year, month + 1, 1).getTime() - 1; 
        //当月最后一天23:59:59时间戳
      }
    return {
       startTime: startTime,
       endTime: endTime
      }
      
    }