export CSV save to file

// http://buildwebthings.com/create-csv-export-client-side-javascript/
function exportToCsv(filename, rows) {
    var processRow = function (row) {
        var finalVal = '';
        for (var j = 0; j < row.length; j++) {
            var innerValue = row[j] === null ? '' : row[j].toString();
            if (row[j] instanceof Date) {
                innerValue = row[j].toLocaleString();
            };
            var result = innerValue.replace(/"/g, '""');
            if (result.search(/("|,|\n)/g) >= 0)
                result = '"' + result + '"';
            if (j > 0)
                finalVal += ',';
            finalVal += result;
        }
        return finalVal + '\n';
    };
 
    var csvFile = '';
    for (var i = 0; i < rows.length; i++) {
        csvFile += processRow(rows[i]);
    }
 
    var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
    if (navigator.msSaveBlob) { // IE 10+
        navigator.msSaveBlob(blob, filename);
    } else {
        var link = document.createElement("a");
        if (link.download !== undefined) { // feature detection
            // Browsers that support HTML5 download attribute
            var url = URL.createObjectURL(blob);
            link.setAttribute("href", url);
            link.setAttribute("download", filename);
            link.style = "visibility:hidden";
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        }
    }
}
/*** alternate code ObjectURL ***/
var csvData = new Blob([str], {type: 'text/csv;charset=utf-8;'});
var csvURL =  null;
if (navigator.msSaveBlob) {
    csvURL = navigator.msSaveBlob(csvData, 'download.cv');
} else {
    csvURL = window.URL.createObjectURL(csvData);
}
var tempLink = document.createElement('a');
tempLink.href = csvURL;
tempLink.setAttribute('download', 'download.cv');
tempLink.click();