Convert Json Array to CSV. Thanks: https://stackoverflow.com/questions/8847766/how-to-convert-json-to-csv-format-and-store-in-a-variable

jsonArrayToCsv.js

var json = []

var fields = Object.keys(json[0])
var replacer = function(key, value) { return value === null ? '' : value } 
var csv = json.map(function(row){
  return fields.map(function(fieldName){
    return JSON.stringify(row[fieldName], replacer)
  }).join(',')
})
csv.unshift(fields.join(',')) // add header column

console.log(csv.join('\r\n'))