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<!-- We include the polyfill to support IE & older browsers -->
<script src=""></script>

  <h3>Access token: </h3>
  <pre id="result"></pre>




// This is what you'd get from `window.location.hash`
var locationDotHash = "#state=xyz&access_token=k40K02Mr3o2o4vgURZQWwco14o0za0D24JrrA2Dn"

// URLSearchParams is available in recent browsers, see
// the 'Browser compatibility' section of 
// If you need to support older browsers, you can use a polyfill:
var params = new URLSearchParams(locationDotHash.slice(1))
var accessToken = params.get("access_token")

// You probably want to POST it somewhere else
// instead of showing it like we do here :)
document.querySelector("#result").textContent = accessToken;