How to get urls HTTP status code 403 with javascript

Question

i have following javascript code, i want to get HTTP 403 Forbidden response code by using javascript, i tried following code and modified it, but its not working for me..

<script type="text/javascript">

var request = new XMLHttpRequest();  
request.open('GET', 'https://domain.com/file', true);
request.send();
request.onreadystatechange = function(){

        if (request.status === 403) {  
            alert("Oh no, it does not exist!");
        }
};



</script>

Answer 1

First, I would try adding the readyState check, like so:

var request = new XMLHttpRequest();  
request.open('GET', 'https://domain.com/file', true);
request.onreadystatechange = function(){
    if (request.readyState === 4) {
        if (request.status === 403) {  
            alert("Oh no, it does not exist!");
        }
    }
};
request.send();

Does this fix it?