使用vue导出excel遇到的坑及解决

import FileSaver from "file-saver";
import XLSX from "xlsx";

   //导出当前表格
exportCurrent:function(){
    var wb = XLSX.utils.table_to_book(document.querySelector('#outTable')) //表格id
    var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: true, type: 'array' })
    try {
        FileSaver.saveAs(new Blob([wbout], { type: 'application/octet-stream' }), 'sheet.xlsx')  //文件名
    } catch (e) { if (typeof console !== 'undefined') console.log(e, wbout) }
    return wbout
},

exportExcel() {
      var xlsxParam = { raw: true };//转换成excel时，使用原始的格式
      var wb = XLSX.utils.table_to_book(document.querySelector("#outTable"),xlsxParam);
      var wbout = XLSX.write(wb, {
        bookType: "xlsx",
        bookSST: true,
        type: "array"
      });
      try {
        FileSaver.saveAs(
          new Blob([wbout], { type: "application/octet-stream;charset=utf-8" }),
          "sheetjs.xlsx"
        );
      } catch (e) {
        if (typeof console !== "undefined") console.log(e, wbout);
      }
      return wbout;
    },

        // 导出
        downLoad(){
            const fileReader = new FileReader() // 第一步创建文件对象
            const loading = this.$loading({
                lock: true,
                text: '导出加载中···',
                spinner: 'el-icon-loading',
                background: 'rgba(0, 0, 0, 0.7)'
            });
            const data = {
                equipmentName: this.searchForm.equipmentName,
                equipmentCode: this.searchForm.equipmentCode,
            };
            download('/api/mfg-mes/equipmentVersion/exportStandardWorkTime', data).then(res => {
                fileReader.onloadend = () => { // 定义方法
                    if (res.type === 'application/json') { // 第三步进行判断
                        const jsonData = JSON.parse(fileReader.result) // 说明是普通对象数据，后台转换失败
                        // 后台信息
                        // console.log(jsonData,'fileReader')
                        this.$message.error(jsonData.msg)
                        loading.close();
                    }else{
                        downloadFile(res, '信息表', 'xlsx')
                        loading.close();
                    }
                }
                fileReader.readAsText(res)
            }).catch(err => {
                console.log(err);
            })
        },