[Javascript] 테이블을 CSV파일로 다운로드

function exportTableToCsv(tableId, filename) {
    if (filename == null || typeof filename == undefined)
        filename = tableId;
    filename += ".csv";

    var BOM = "\uFEFF";

    var table = document.getElementById(tableId);
    var csvString = BOM;
    for (var rowCnt = 0; rowCnt < table.rows.length; rowCnt++) {
        var rowData = table.rows[rowCnt].cells;
        for (var colCnt = 0; colCnt < rowData.length; colCnt++) {
            var columnData = rowData[colCnt].innerHTML;
            if (columnData == null || columnData.length == 0) {
                columnData = "".replace(/"/g, '""');
            }
            else {
                columnData = columnData.toString().replace(/"/g, '""'); // escape double quotes
            }
            csvString = csvString + '"' + columnData + '",';
        }
        csvString = csvString.substring(0, csvString.length - 1);
        csvString = csvString + "\r\n";
    }
    csvString = csvString.substring(0, csvString.length - 1);

    // IE 10, 11, Edge Run
    if (window.navigator && window.navigator.msSaveOrOpenBlob) {

        var blob = new Blob([decodeURIComponent(csvString)], {
            type: 'text/csv;charset=utf8'
        });

        window.navigator.msSaveOrOpenBlob(blob, filename);

    } else if (window.Blob && window.URL) {
        // HTML5 Blob
        var blob = new Blob([csvString], { type: 'text/csv;charset=utf8' });
        var csvUrl = URL.createObjectURL(blob);
        var a = document.createElement('a');
        a.setAttribute('style', 'display:none');
        a.setAttribute('href', csvUrl);
        a.setAttribute('download', filename);
        document.body.appendChild(a);

        a.click()
        a.remove();
    } else {
        // Data URI
        var csvData = 'data:application/csv;charset=utf-8,' + encodeURIComponent(csvString);
        var blob = new Blob([csvString], { type: 'text/csv;charset=utf8' });
        var csvUrl = URL.createObjectURL(blob);
        var a = document.createElement('a');
        a.setAttribute('style', 'display:none');
        a.setAttribute('target', '_blank');
        a.setAttribute('href', csvData);
        a.setAttribute('download', filename);
        document.body.appendChild(a);
        a.click()
        a.remove();
    }
}

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[Javascript] 테이블을 CSV 파일로 다운로드