//  下载插件
import moment from "moment";
//  快捷时间选择方法
export function getTime(type) {
  switch (type) {
    case "quickTime":
      return [null, null];
    case "today":
      return [moment().format("YYYY-MM-DD 00:00:00"), moment().format("YYYY-MM-DD 23:59:59")];
    case "yesterday":
      const yesterday = moment().subtract(1, "days").startOf("day");
      const start = yesterday.format("YYYY-MM-DD 00:00:00");
      const end = yesterday.format("YYYY-MM-DD 23:59:59");
      return [start, end];
    case "currentWeek":
      const start1 = moment().isoWeekday(1).format("YYYY-MM-DD 00:00:00");
      const end1 = moment().format("YYYY-MM-DD 23:59:59");
      return [start1, end1];
    case "lastWeek":
      const start2 = moment()
        .subtract(1, 'week').startOf('isoWeek')
        .format("YYYY-MM-DD 00:00:00");
      const end2 = moment()
        .subtract(1, 'week').endOf('isoWeek')
        .format("YYYY-MM-DD 23:59:59");
      return [start2, end2];
    case "currentMonth":
      const start3 = moment().startOf("month").format("YYYY-MM-DD 00:00:00");
      const end3 = moment().format("YYYY-MM-DD HH:mm:ss");
      // moment()
      //   .endOf("month")
      //   .format("YYYY-MM-DDT23:59:59");
      return [start3, end3];
    case "lastMonth":
      const start4 = moment().startOf("month").subtract(1, "months").format("YYYY-MM-DD 00:00:00");
      const end4 = moment().startOf("month").subtract(1, "days").format("YYYY-MM-DD 23:59:59");
      return [start4, end4];
    case "currentYear":
      const start5 = moment().startOf("year").format("YYYY-MM-DD 00:00:00");
      const end5 = moment().format("YYYY-MM-DD 23:59:59");
      // moment()
      //   .endOf("year")
      //   .format("YYYY-MM-DDT23:59:59");
      return [start5, end5];
    case "lastYear":
      const start6 = moment().subtract(1, "year").startOf("year").format("YYYY-MM-DD 00:00:00");
      const end6 = moment().subtract(1, "year").endOf("year").format("YYYY-MM-DD 23:59:59");
      return [start6, end6];
  }
}

//  组件中运用方法
import { generateQuickTime } from "@/utils/utils";
<el-select v-model="formData.quickTime" clearable @change="onDateChange">
      <el-option value="quickTime" label="快捷时间"></el-option>
      <el-option value="today" label="今天"></el-option>
      <el-option value="yesterday" label="昨天"></el-option>
      <el-option value="currentWeek" label="本周"></el-option>
      <el-option value="lastWeek" label="上周"></el-option>
      <el-option value="currentMonth" label="本月"></el-option>
      <el-option value="lastMonth" label="上月"></el-option>
      <el-option value="currentYear" label="本月"></el-option>
      <el-option value="lastYear" label="上月"></el-option>
 </el-select>
onDateChange(val) {
      if (val) {
        const [start, end] = generateQuickTime(val);
        this.formData.startTime = start;
        this.formData.endTime = end;
      } else {
        this.formData.startTime = null;
        this.formData.endTime = null;
      }
    },