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

Posted by Philip Gerber
Philip Gerber
5,000 Points

Ajax Basics

whats wrong with this code? 

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
  if (xhr.readyState === 4 && xhr.status == 200) {
            document.getElementByID('sidebar');
            };
};
xhr.open('GET', 'sidebar.html');
xhr.send();
Dave McFarland
Dave McFarland
Treehouse Teacher
Dave McFarland
Dave McFarland
Treehouse Teacher

To put code into a forum post use triple back ticks -- ``` — around the code. I fixed your code here, but in the future here's a forum discussion that describes how to add HTML, CSS, JavaScript or other code to the forum: https://teamtreehouse.com/forum/posting-code-to-the-forum

3 Answers

Dustin Matlock
Dustin Matlock
33,856 Points

Hi Phillip, to finish the challenges you should have something like below.

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
    if (xhr.readyState === 4) {
        if (xhr.status === 200) {
            document.getElementById('sidebar').innerHTML = xhr.responseText;
        }
    }
};
xhr.open('GET', 'sidebar.html');
xhr.send();
Dean Irvin
PLUS
Dean Irvin
Courses Plus Student 5,030 Points
Dean Irvin
Dean Irvin
Courses Plus Student 5,030 Points

Im pretty sure you just have an extra semi colin

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() { 
  if (xhr.readyState === 4 && xhr.status == 200) { 
    document.getElementByID('sidebar');

  }  // I dont think you need one here

}; 
xhr.open('GET', 'sidebar.html'); 
xhr.send();
Dave McFarland
Dave McFarland
Treehouse Teacher
Dave McFarland
Dave McFarland
Treehouse Teacher

To put code into a forum post use triple back ticks -- ``` — around the code. I fixed your code here, but in the future here's a forum discussion that describes how to add HTML, CSS, JavaScript or other code to the forum: https://teamtreehouse.com/forum/posting-code-to-the-forum

Philip Gerber
Philip Gerber
5,000 Points
Philip Gerber
Philip Gerber
5,000 Points

thanks all - I was missing the innerHTML stuff