javascript - AJAX ReadyState 4 Status 200 but responseText undefined -

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i have html , php file:

test.html: 

var req = new xmlhttprequest(); req.onreadystatechange = function() {     if (req.readystate==4 && req.status == 200) {       var dat = req.reponsetext;       alert("status text: " + req.statustext);       alert("response: " + dat);     }   };  req.open("get", "info.php", true); req.send();

and info.php:

<?php echo "test"; ?>

accessing info.php shows "test" expected, responsetext ajax request undefined. missing here?

typo typo typo

var dat = req.reponsetext;                ^^^

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