Untitled

<!DOCTYPE html>
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<html>
<body>

<table>
<tr>
    <th>Name</th>
    <th>Email</th>
    <th>Country</th>
</tr>
<tr>
    <td>John Doe</td>
    <td>john@gmail.com</td>
    <td>USA</td>
</tr>
<tr>
    <td>Stephen Thomas</td>
    <td>stephen@gmail.com</td>
    <td>UK</td>
</tr>
<tr>
    <td>Natly Oath</td>
    <td>natly@gmail.com</td>
    <td>France</td>
</tr>
</table>
<button onclick="exportTableToCSV('members.csv')">Export HTML Table To CSV File</button>

 <script>
function downloadCSV(csv, filename) {
var csvFile;
var downloadLink;

// CSV file
csvFile = new Blob([csv], {type: "text/csv"});

// Download link
downloadLink = document.createElement("a");

// File name
downloadLink.download = filename;

// Create a link to the file
downloadLink.href = window.URL.createObjectURL(csvFile);

// Hide download link
downloadLink.style.display = "none";

// Add the link to DOM
document.body.appendChild(downloadLink);

// Click download link
downloadLink.click();// throwing error.

}
function exportTableToCSV(filename) {
var csv = [];
var rows = document.querySelectorAll("table tr");

for (var i = 0; i < rows.length; i++) {
    var row = [], cols = rows[i].querySelectorAll("td, th");

    for (var j = 0; j < cols.length; j++)
        row.push(cols[j].innerText);

    csv.push(row.join(","));
}

// Download CSV file
downloadCSV(csv.join("n"), filename);
}

</script>

</body>
</html>