Answer by YManaf for How can I write a csv in a file with xslx library in node?

First of all generate your CSV content:

var table = document.getElementById(id);var wb = XLSX.utils.table_to_book(table, { sheet: "Sheet JS" });var ws1 = wb.Sheets[wb.SheetNames[0]];var csv = XLSX.utils.sheet_to_csv(ws1, { strip: true });download_file(csv, 'my_csv.csv', 'text/csv;encoding:utf-8');

And then the download_file function credit to Javascript: set filename to be downloaded:

 function download_file(content, fileName, mimeType) {        var a = document.createElement('a');        mimeType = mimeType || 'application/octet-stream';        if (navigator.msSaveBlob) { // IE10            navigator.msSaveBlob(new Blob([content], {                type: mimeType            }), fileName);        } else if (URL && 'download' in a) { //html5 A[download]            a.href = URL.createObjectURL(new Blob([content], {                type: mimeType            }));            a.setAttribute('download', fileName);            document.body.appendChild(a);            a.click();            document.body.removeChild(a);        } else {            location.href = 'data:application/octet-stream,'+ encodeURIComponent(content); // only this mime type is supported        }    }