So my code (app.js) is like this:

 

( function() {
        /**
         * Back key event handler
         */
 var options = {enableHighAccuracy: true, maximumAge: 600000, timeout: 0};
 var watchID;
 function successCallback(position)
 {
     var page = document.getElementsByClassName('ui-title')[0];
     page.innerHTML = position;
    console.log(position);
 }
 function errorCallback(error)
 {
  console.log(error);
     
 }
        var watchID = navigator.geolocation.watchPosition(successCallback, errorCallback, options);

        window.addEventListener('tizenhwkey', function(ev) {
            if (ev.keyName === "back") {
                var page = document.getElementsByClassName('ui-page-active')[0],
                    pageid = page ? page.id : "";
                if (pageid === "main") {
                    try {
                        tizen.application.getCurrentApplication().exit();
                    } catch (ignore) {}
                } else {
                    window.history.back();
                }
            }
        });
    }());

 

Should work no? Still on Emulator it breaks at console.log(error) (i've set the location and gps in config.xml)