Native Object vs JSON examle

obj-and-json.js

const testObj = {
  name: "Hammad",
  age: 30,
  favoriteAnime: [
    "Cowboy Bebop",
    "Dragon Ball",
    "Death Note",
    "Samurai Champloo"
  ],
  holla: () => console.log("hollaaaaaaa")
};

const jsonTestObj = JSON.stringify(testObj);

const parsedJson = JSON.parse(jsonTestObj);

/** Testing */

console.log(testObj.name);
console.log(testObj.favoriteAnime[0]);
console.log(testObj.holla());

console.log(jsonTestObj);
console.log(jsonTestObj.name); // doesn't work!

console.log(parsedJson.name);
console.log(parsedJson.favoriteAnime[0]);
console.log(parsedJson.holla()); // doesn't work!