fetch请求文件流并下载（Excel）

fetch(url,{
    method: 'get',
    responseType: 'blob'}).then(res =>{     
    returnres.blob();
}).then(blob =>{
    let bl = new Blob([blob], {type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"});
    let fileName = '文件名'+".xlsx";
    var link = document.createElement('a');
    link.href =window.URL.createObjectURL(blob);
    link.download =fileName;
    link.click();
    window.URL.revokeObjectURL(link.href);
})

fetch(url,{
    method: 'get',
    responseType: 'arraybuffer'}).then(res =>{     
    returnres. arraybuffer();
}).then(arraybuffer =>{
    let bl = new Blob([arraybuffer], {type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"});
    let fileName = '文件名'+".xlsx";
    var link = document.createElement('a');
    link.href =window.URL.createObjectURL(blob);
    link.download =fileName;
    link.click();
    window.URL.revokeObjectURL(link.href);
})