I'm using a [JavaScript SDK by Stack Exchange][1] provided with the latest API, and despite following the official instructions & examples it doesn't work - it seems there is a bug which breaks the workflow, and I believe it's on Stack Exchange side. The issue is that `https://stackexchange.com/oauth/login_success` never gets information about success/error of the authorization workflow, it just stays on the "Authorizing Application" step never going further.

Further investigations show a Chrome Console output showing us a "Uncaught TypeError: Cannot read property 'msie' of undefined" jQuery error on Stack Exchange's login_success page:

`login_success?assisted=8723&protocol=https&proxy=https://zendesk.mvink.me/integrations/stackexchang…:122 Uncaught TypeError: Cannot read property 'msie' of undefined
    at HTMLDocument.<anonymous> (login_success?assisted=8723&protocol=https&proxy=https://zendesk.mvink.me/integrations/stackexchang…:122)
    at i (jquery.min.js:2)
    at Object.fireWith [as resolveWith] (jquery.min.js:2)
    at Function.ready (jquery.min.js:2)
    at HTMLDocument.K (jquery.min.js:2)
(anonymous) @ login_success?assisted=8723&protocol=https&proxy=https://zendesk.mvink.me/integrations/stackexchang…:122
i @ jquery.min.js:2
fireWith @ jquery.min.js:2
ready @ jquery.min.js:2
K @ jquery.min.js:2`

Looking into the source code, it seems you are using `$.browser.msie && $.browser.version` which [has been deprecated in jQuery 1.9][2], and you are currently using jQuery 1.12 on this page.
`
// IE technically supports postMessage, but does a *really* bad job of it
            if (window.postMessage && !($.browser.msie && $.browser.version <= '9.0')) {
                // modern browsers
                window.opener.postMessage(window.location.hash, 'https://zendesk.mvink.me');
            } else {`

The result is - success action is never passed to the host window (the one auth process has been called from), so it's not possible to get an access token back.

Please have a look into this.


  [1]: https://api.stackexchange.com/docs/js-lib
  [2]: http://jquery.com/upgrade-guide/1.9/#jquery-browser-removed