Given a json file or json data output it's contents to a csv.

json-to-csv.js

/*-----------------------
Imports
-----------------------*/
import fs from "fs";
import csv from "csvtojson";
import path from "path";
import { fileURLToPath } from "url";
import { stringify } from "csv";

/*-----------------------
Script
-----------------------*/

// ES6 method to get relative file.
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

// Paths
const jsonInput = path.join(__dirname, "../input", "data.json");
const csvOutput = path.join(__dirname, "../output", "data.csv");

// Alter data
// Normally perform some operations here to alter the json data and format it.
const data = jsonInput.map((item) => item);

// Output
stringify(data, { header: true }, function (err, output) {
  fs.writeFileSync(csvOutPut, output);
});