vue如何使用axios实现下载excel文件的功能

/**
 * 下载文件
 */
export const downloadFile = (url,ext, params) => {
  let accessToken = getStore('accessToken');
  return axios({
    method: 'get',
    url: `${base}${url}`,
    params: params,
    headers: {
      'accessToken': accessToken
    },
    responseType: 'blob', //二进制流
  }).then(res => {
    // 处理返回的文件流
    const content = res;
    const blob = new Blob([content], { type: 'application/vnd.ms-excel;charset=utf-8' });
    var date =
      new Date().getFullYear() +
      "" +
      (new Date().getMonth() + 1) +
      "" +
      new Date().getDate() +
      "" +
      new Date().getHours() +
      "" +
      new Date().getMinutes() +
      "" +
      new Date().getSeconds() +
      "" +
      new Date().getMilliseconds();
    const fileName = date + "." + ext;
    if ("download" in document.createElement("a")) {
      // 非IE下载
      const elink = document.createElement("a");
      elink.download = fileName;
      elink.style.display = "none";
      elink.href = URL.createObjectURL(blob);
      document.body.appendChild(elink);
      elink.click();
      URL.revokeObjectURL(elink.href); // 释放URL 对象
      document.body.removeChild(elink);
    } else {
      // IE10+下载
      navigator.msSaveBlob(blob, fileName);
    }
  });
};

// 评价导出
export const getRecordExport= (params) => {
  return downloadFile('/record/export',"xlsx", params)
}

<script>
import {
 getReportExport
} from "@/api/index";
import util from "@/libs/util.js";

export default {
 name: "task-manage",
 data() {},
 methods: {
  exportExcel() {
   getReportExport(this.searchForm).then(res=>{});
  }
 }
}