Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript AJAX Basics (retiring) Programming AJAX Check for the correct ready state

Posted by arshia mohammadi
arshia mohammadi
7,657 Points

What should I do in this code challenge?!

In the conditional statement you just created, also test to make sure the return status from the server is OK.

app.js 
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
    if(xhr.readyState === 4){
    xhr.send();
  }
};
xhr.open('GET', 'sidebar.html');
xhr.send();
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>AJAX with JavaScript</title>
  <script src="app.js"></script>
</head>
<body>
  <div id="main">
    <h1>AJAX!</h1>
  </div>
  <div id="sidebar"></div>
</body>
</html>

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

You should check for a status of 200 (OK). See the example on this MDN page for help