前端接收导出excel文件

后端导出Excel，前端接收

exportSubscribe().then((res) => {
        let fileName = "订阅关系列表.xls";
        let blob = new Blob([res.data], {
          type: "application/vnd.ms-excel",
        });
        let reader = new FileReader();
        reader.readAsDataURL(blob);
        reader.onload = function (e) {
          let a = document.createElement("a");
          a.download = fileName;
          a.href = URL.createObjectURL(blob);
          $("body").append(a);
          a.click();
          $("body").remove(a);
        };
      });