纯前端导出xls表

 /*
    tableData:表格数据
    fieldLabels：表头字段
    fieldKeys：表头字段对应的数据字段
    fileName：导出文件名称
    */
    excelUtils(tableData, fieldLabels, fieldKeys, fileName) {
      let dataStr = fieldLabels.toString() + "\r\n";
      tableData.forEach((item) => {
        fieldKeys.forEach((key) => {
          // 加引号是为了使换行符在单元格内正常显示
          dataStr += `"${item[key]}"\t,`;
        });
        dataStr += "\r\n";
      });

      const url =
        "data:text/xls;charset=utf-8,\ufeff" + encodeURIComponent(dataStr);
      const link = document.createElement("a");
      link.href = url;
      link.download = fileName + ".xls";
      link.style.display = "none";
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link); //释放标签
      this.closeExport();
    },