moment使用

传送门

 import moment from "moment";
   let now = new Date();
      switch (d) {
        case 1:
          this.startDate = moment(now)
            .subtract(1, "months")
            .format("YYYY/MM/DD");
          this.endDate = moment(now).format("YYYY/MM/DD");
          // 近一个月
          break;
        case 2:
          // 近三个月
          this.startDate = moment(now)
            .subtract(3, "months")
            .format("YYYY/MM/DD");
          this.endDate = moment(now).format("YYYY/MM/DD");
          break;
        case 3:
          // 近一年
          this.startDate = moment(now)
            .subtract(12, "months")
            .format("YYYY/MM/DD");
          this.endDate = moment(now).format("YYYY/MM/DD");
          break;

        default:
          break;
      }