exportToCSV.js

$(document).ready(function () {
    function exportTableToCSV($table, filename) {
        var $rows = $table.find('tr:has(td),tr:has(th)'),
            tmpColDelim = String.fromCharCode(11),
            tmpRowDelim = String.fromCharCode(0),
            colDelim = '","',
            rowDelim = '"\r\n"',
            csv = '"' + $rows.map(function (i, row) {
                var $row = $(row), $cols = $row.find('td,th');
                return $cols.map(function (j, col) {
                    var $col = $(col), text = $col.text();
                    return text.replace(/"/g, '""'); // escape double quotes
                }).get().join(tmpColDelim);
            }).get().join(tmpRowDelim)
                .split(tmpRowDelim).join(rowDelim)
                .split(tmpColDelim).join(colDelim) + '"',
            csvData = 'data:application/csv;charset=utf-8,' + encodeURIComponent(csv);
        if (window.navigator.msSaveBlob) {
            window.navigator.msSaveOrOpenBlob(new Blob([csv], {type: "text/plain;charset=utf-8;"}), "csvname.csv")
        }
        else {
            $(this).attr({ 'download': filename, 'href': csvData, 'target': '_blank' });
        }
    }
    $("#export").on('click', function (event) {
        exportTableToCSV.apply(this, [$('#MainTable'), 'emails.csv']);
    });
});