convert json to csv format

Question

I try to use as input a file in json format. Here is a snippet of example data.

[
{
id: 1671349531,
name: \"A Wild Restaurant Expansion\",
blurb: \"We are lo         


        

Answer 1

Another implementation without json-2-csv that can handle complex data:

    // Some complex demo data
    var data = [
        {
            "id": "111",
            "name": "Johny Smith",
            "age": "23",
            "dates": [
                {
                    "birthday": "01.01.1990",
                    "nameday": "02.02",
                    "phone": {
                        "home": "02123123123123",
                        "mobile": "07124123123",
                    }
                }
            ]
        },
        {
            "id": "222",
            "name": "Jane Alex",
            "age": "43",
            "dates": [
                {
                    "birthday": "06.06.1997",
                    "nameday": "03.03",
                    "phone": {
                        "home": "029999999999999",
                        "mobile": "0788888888",
                    }
                }
            ]
        }
    ];

    // Converted string ready to be downloaded as csv
    var converted = toCsv(data);

    // This is used to automatically generate and download the  .CSV file
    var element = document.createElement('a');
    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(converted));
    element.setAttribute('download', "Output.csv");
    element.style.display = 'none';
    document.body.appendChild(element);
    element.click();
    document.body.removeChild(element);


    //////////////////////////////////// THE MAGIC  -> ////////////////////////////////////

    function toCsv(arr) {
        arr = pivot(arr);
        return arr.map(function (row) {
            return row.map(function (val) {
                return isNaN(val) ? JSON.stringify(val) : +val;
            }).join(',');
        }).join('\n');
    }

    function toConsumableArray(arr) {
        if (Array.isArray(arr)) {
            for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {
                arr2[i] = arr[i];
            }
            return arr2;
        } else {
            return Array.from(arr);
        }
    }

    function pivot(arr) {
        var mp = new Map();

        function setValue(a, path, val) {
            if (Object(val) !== val) {
                // primitive value
                var pathStr = path.join('.');
                var i = (mp.has(pathStr) ? mp : mp.set(pathStr, mp.size)).get(pathStr);
                a[i] = val;
            } else {
                for (var key in val) {
                    setValue(a, key == '0' ? path : path.concat(key), val[key]);
                }
            }
            return a;
        }

        var result = arr.map(function (obj) {
            return setValue([], [], obj);
        });
        let outcome = ([[].concat(toConsumableArray(mp.keys()))].concat(toConsumableArray(result)));

        return outcome;
    }

See JS Fiddle -> https://jsfiddle.net/gbktnd1j/

Answer 2

I posted a couple of links in the comments as I was researching your answer, but now I am pretty convinced this is the way to do it.

Install the node package, and then use the following with your own json string, (which I just lifted from the link above.):

var converter = require('json-2-csv');

var documents = [
    {
        Make: 'Nissan',
        Model: 'Murano',
        Year: '2013',
        Specifications: {
            Mileage: '7106',
            Trim: 'S AWD'
        }
    },
    {
        Make: 'BMW',
        Model: 'X5',
        Year: '2014',
        Specifications: {
            Mileage: '3287',
            Trim: 'M'
        }
    }
];

var json2csvCallback = function (err, csv) {
    if (err) throw err;
    console.log(csv);
};

converter.json2csv(documents, json2csvCallback);

This will return:

Make,Model,Year,Specifications.Mileage,Specifications.Trim
Nissan,Murano,2013,7106,S AWD
BMW,X5,2014,3287,M