INVALID_STATE_ERR: DOM Exception 11

Question

I\'m developing a simple auxiliary class to send requests using XmlHttpRequest (code below). But I cant make it work. At google chrome, for example, I get the error INVALI

Answer 1

In my case the error occurred when i tried to access xhr.statusText within the xhr.onreadystatechange method, however retrieving xhr.readyState went just fine.