While working with AJAX, errors are very common.
Understanding these errors helps developers debug and fix issues quickly.
One common error is not calling the send method.
Without send, the request never reaches the server.
Another common mistake is checking response before the request completes.
Using incorrect file path leads to 404 error.
Not checking readyState and status causes unexpected results.
POST requests fail if content type is not set properly.
Correct implementation prevents most AJAX errors.
Debugging AJAX requires checking browser console, network tab, and server response.
After completing this lesson, you will be able to identify and fix common XMLHttpRequest issues confidently.