javascript - Get URL # fragment XMLHttpRequest -

im building chrome extension allow user select facebook posts , send them server.

i have xmlhttprequest sending facebook in order receive access token follows:

function gettoken() { var xhr = new xmlhttprequest(); xhr.open("get", "https://www.facebook.com/dialog/oauth?client_id=my_app_id_here&redirect_uri=https://www.facebook.com/connect/login_success.html&response_type=token"); xhr.send(); xhr.onreadystatechange = function() { if (xhr.readystate == 4 && xhr.status == 200) {         xxxxxxxxxxxxxxxxxx         xhr.close;     } } 

}

the xmlhttprequest sent server successful , receive access token in response dont know how access it.

if have console window open on chrome , select network tab, can see request being sent, , response being received (with access token) received url fragment , don't have clue how access it.

gettoken function executed in content script if makes difference.

edit:

xhr.responsetext follows

success
security warning: please treat url above password , not share anyone.settimeout(function() {window.history.replacestate && window.history.replacestate({}, "", "blank.html#=");},500);

xhr.responsexml follows

null

can please post response, executing console.log(xhr.response, xhr.responsetext) , post here (modifying accordingly dummy data)? think need manipulate strings value need.