需求：获取最近六个月的月份列表，倒序排列。

            function getLast6Months(){
				var last6Months = [];
				var today = new Date();
				var year = today.getFullYear();
				today.setMonth(today.getMonth());
				for(var i=5;i>=0;i--){
					last6Months[5-i] = today.getFullYear()  +"-"+ fillZero(Number(today.getMonth())+1,2);//这里+1是因为js 的月份是0-11
					if(today.getMonth == 0){
						today.setFullYear(Number(year)-1);
					}
					today.setMonth(Number(today.getMonth()-1));
				}
				return last6Months;
			}
			    //补零操作，保证月份为1位的时候补充前置0
			function fillZero(num,fill){
				var len = ('' + num).length;
				return (Array(fill > len ? fill - len + 1 || 0 : 0).join(0) + num);
			}

运行结果：

[
    "2024-01",
    "2023-12",
    "2023-11",
    "2023-10",
    "2023-09",
    "2023-08"
]