JSFiddle - React, Tailwind, and code Playground

JavaScript

var object1 = {
    firstName: "Marco",
    lastName: "Rossi",
    favoriteFood: {firstCourse: "pasta", secondCourse: "salsiccia"},
    favoriteDrink: "Vino",
    favoriteSong: "O sole mio"
}

var object2 = {
    firstName: "Marco",
    lastName: "Rossi",
    favoriteFood: {firstCourse: "pasta"},
    favoriteSong: "Viaggiare"
}

$.each(object1, function( index, value ) {
    console.log( index + ": " + typeof(value));
});