一文详解js如何用文件流下载csv文件

var blob = new Blob(dataArray, options);

 var str = "<div>Hello World</div>";
 var blob = new Blob([str], {type: 'text/xml'});
 console.log(blob); // 输出：Blob {size: 22, type: "text/xml"}

 window.URL.createObjectURL(file / blob);

    var str = "<div>Hello World</div>";
    var blob = new Blob([str], {type: '.csv, application/vnd.openxmlfORMats-        officedocument.spreadsheetml.sheet, application/vnd.ms-excel'});
    console.log(blob);
    const url3 = window.URL.createObjectURL(blob);
    console.log(url3);

  Blob {size: 22, type: ".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel"}

blob:null/2c75a56e-0104-4572-bc19-391d3bf93D9d

        var str = "<div>Hello World</div>";
        var blob = new Blob([str], {type: '.csv, application/vnd.openxmlformats-        officedocument.spreadsheetml.sheet, application/vnd.ms-excel'});
        console.log(blob);
        const url3 = window.URL.createObjectURL(blob);
        console.log(url3);
        var filename = '文件流下载' + '.csv';
        const link = document.createElement('a');
        link.style.display = 'none';
        link.href = url3;
        link.setAttribute('download', filename);
        document.body.appendChild(link);
        link.click();