js array to csv

1var colors = ["red", "blue", "green"];
2var colorsString = colors.join(","); //"red,blue,green"

1const arrayToCSV = (arr, delimiter = ',') =>
2  arr.map(v => v.map(x => `"${x}"`).join(delimiter)).join('\n');

1function exportToCsv(filename, rows) {
2    var processRow = function (row) {
3        var finalVal = '';
4        for (var j = 0; j < row.length; j++) {
5            var innerValue = row[j] === null ? '' : row[j].toString();
6            if (row[j] instanceof Date) {
7                innerValue = row[j].toLocaleString();
8            };
9            var result = innerValue.replace(/"/g, '""');
10            if (result.search(/("|,|\n)/g) >= 0)
11                result = '"' + result + '"';
12            if (j > 0)
13                finalVal += ',';
14            finalVal += result;
15        }
16        return finalVal + '\n';
17    };
18
19    var csvFile = '';
20    for (var i = 0; i < rows.length; i++) {
21        csvFile += processRow(rows[i]);
22    }
23
24    var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
25    if (navigator.msSaveBlob) { // IE 10+
26        navigator.msSaveBlob(blob, filename);
27    } else {
28        var link = document.createElement("a");
29        if (link.download !== undefined) { // feature detection
30            // Browsers that support HTML5 download attribute
31            var url = URL.createObjectURL(blob);
32            link.setAttribute("href", url);
33            link.setAttribute("download", filename);
34            link.style.visibility = 'hidden';
35            document.body.appendChild(link);
36            link.click();
37            document.body.removeChild(link);
38        }
39    }
40}
41

1var objectToCSVRow = function(dataObject) {
2    var dataArray = new Array;
3    for (var o in dataObject) {
4        var innerValue = dataObject[o]===null?'':dataObject[o].toString();
5        var result = innerValue.replace(/"/g, '""');
6        result = '"' + result + '"';
7        dataArray.push(result);
8    }
9    return dataArray.join(' ') + '\r\n';
10}
11
12var exportToCSV = function(arrayOfObjects) {
13
14    if (!arrayOfObjects.length) {
15        return;
16    }
17
18    var csvContent = "data:text/csv;charset=utf-8,";
19
20    // headers
21    csvContent += objectToCSVRow(Object.keys(arrayOfObjects[0]));
22
23    arrayOfObjects.forEach(function(item){
24        csvContent += objectToCSVRow(item);
25    }); 
26
27    var encodedUri = encodeURI(csvContent);
28    var link = document.createElement("a");
29    link.setAttribute("href", encodedUri);
30    link.setAttribute("download", "customers.csv");
31    document.body.appendChild(link); // Required for FF
32    link.click();
33    document.body.removeChild(link); 
34}
35