js获取最近三个月（时间格式为-/且补零的）

const getMonth = () => {
  // 获取当前日期
  var currentDate = new Date();

  // 获取当前月份
  var currentMonth = currentDate.getMonth();

  // 获取当前年份
  // var currentYear = currentDate.getFullYear();

  var previousMonthDate1 = new Date();
  previousMonthDate1.setMonth(currentMonth - 1);
  var previousMonth1 = previousMonthDate1.getMonth();
  var previousYear1 = previousMonthDate1.getFullYear();
  
  // 计算前三个月的年份和月份
  var previousMonthDate = new Date();
  previousMonthDate.setMonth(currentMonth - 3);
  var previousMonth = previousMonthDate.getMonth();
  var previousYear = previousMonthDate.getFullYear();

  var formattedPreviousMonth1 = previousYear1 + '-' + (previousMonth1 + 1).toString().padStart(2, '0');
  
  // 格式化年份和月份
  var formattedPreviousMonth = previousYear + '-' + (previousMonth + 1).toString().padStart(2, '0');
  
  //前三个月
  console.log(formattedPreviousMonth);
  // 当前月
  console.log(formattedPreviousMonth1);

}
getMonth()