csv files with javascript code example

Example 1: Working with CSV in JavaScript

/*
    This code comes from Vincent Lab
    And it has a video version linked here: https://www.youtube.com/watch?v=95wAbrQAm5g
*/

// Import dependencies
const fs = require("fs");
const csv = require("csvtojson");
const { Parser } = require("json2csv");

(async () => {

    // Load the cars
    const cars = await csv().fromFile("cars.csv");

    // Show the cars
    console.log(cars);

    // Modify the cars
    cars[0].Year = 1998;

    // Saved the cars
    const carsInCsv = new Parser({ fields: ["Year", "Make", "Model", "Length"] }).parse(cars);
    fs.writeFileSync("cars.csv", carsInCsv);

})();

Example 2: create csv file javascript

$("#download_1").click(function() {
var json_pre = '[{"Id":1,"UserName":"Sam Smith"},{"Id":2,"UserName":"Fred Frankly"},{"Id":1,"UserName":"Zachary Zupers"}]';
var json = $.parseJSON(json_pre);

var csv = JSON2CSV(json);
var downloadLink = document.createElement("a");
var blob = new Blob(["\ufeff", csv]);
var url = URL.createObjectURL(blob);
downloadLink.href = url;
downloadLink.download = "data.csv";

document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
});