descarca_csv.js

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);
}

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();
}