Detect a 304 redirection on an AJAX request

is there a way to detect whether an AJAX request has been redirected through a 304 response ? I tried an onreadystagechange with xhr.status==304 but got nothing. Are we only bound to 200 response codes ?

The issue was already raised on SO but I coul开发者_运维技巧dn't find any answer...

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if (xhr.status == 304){
    //do your code
}

It should 100% work