Catch User 'Allow/Deny' Response on Computer Location Query

Question

I am using MaxMind GeoIP2 JavaScript API to determine a user's location when they enter my website. This prompts the user for their permission to provide the location via the browser. I am using this information to load as the default position of a map I have on my website.

I was wondering if there is some capture for this Allow/Deny prompt click. For example, the map loads the default position if the user were to deny the request, but if there user hasn't made a choice until after the map loads, I'd like to relocate the map if they do happen to click Allow once the browser has loaded the website.

For what it is worth, here is some example code that gets the users information once permission is given (taken from the URL above):

<script type="text/javascript" src="//j.maxmind.com/js/apis/geoip2/v2.0/geoip2.js"></script>

<script type="text/javascript">

  var onSuccess = function(location){
    alert(
      "Lookup successful:\n\n" + JSON.stringify(location, undefined, 4)
    );
  };

  var onError = function(error){
    alert(
      "Error:\n\n" + JSON.stringify(error, undefined, 4)
    );
  };

  geoip2.city(onSuccess, onError);

</script>