js/vue 计算近半年/近1年日期(可跨年)

//计算近半年时间
      let nowDate = new Date();
      let array = [];
      let year = nowDate.getFullYear();
      let mon = nowDate.getMonth() + 1;
      for (let i = 0; i < 6; i++) {
        mon = mon - 1;
        if (mon <= 0) {
          year = year - 1;
          mon = mon + 12;
        }
        if (mon < 10) {
          mon = "0" + mon;
        }
        array[i] = year + "-" + mon;
      }
console.log(array);  //["2020-12", "2020-11", "2020-10", "2020-09", "2020-08", "2020-07"]

console.log(arrays);
console.log(arrays.pop());