angular+axios后台返回excel文件流，js下載

  /** 下載excel */
  downloadExcel(data: Blob): void {
    var blob = new Blob([data], { type: 'application/vnd.ms-excel    application/x-excel;charset=utf-8' }); // application/vnd.openxmlformats-officedocument.spreadsheetml.sheet這里表示xlsx類型
    var downloadElement = document.createElement('a');
    var href = window.URL.createObjectURL(blob);
    downloadElement.href = href;
    downloadElement.download = '傳染病報告卡待填報導出.xls';
    document.body.appendChild(downloadElement);
    downloadElement.click();
    document.body.removeChild(downloadElement);
    window.URL.revokeObjectURL(href);
  }

記得請求的responsType: 'blob'