JSON APIs and Ajax:Access the JSON Data from an APIPassed

What is your hint or solution suggestion?
Here we have an API that provides JSON data which is an array type containing object data types with key-value pairs,our requirement is to print to the console the second element value of the key codeName of the object element whose id is 2.We will use a combination of dot and bracket notation of object to access this data.

  document.addEventListener('DOMContentLoaded', function(){
    document.getElementById('getMessage').onclick = function(){
      const req = new XMLHttpRequest();
      req.open("GET",'/json/cats.json', true);
        const json = JSON.parse(req.responseText);
        document.getElementsByClassName('message')[0].innerHTML = JSON.stringify(json);
        // Add your code below this line

 // Add your code above this line

  body {
    text-align: center;
    font-family: "Helvetica", sans-serif;
  h1 {
    font-size: 2em;
    font-weight: bold;
  .box {
    border-radius: 5px;
    background-color: #eee;
    padding: 20px 5px;
  button {
    color: white;
    background-color: #4791d0;
    border-radius: 5px;
    border: 1px solid #4791d0;
    padding: 5px 10px 8px 10px;
  button:hover {
    background-color: #0F5897;
    border: 1px solid #0F5897;

<h1>Cat Photo Finder</h1>
<p class="message box">
  The message will go here
  <button id="getMessage">
    Get Message

Challenge: Access the JSON Data from an API

Link to the challenge: