SOURCE

if(navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(
        function (position) {  
            var longitude = position.coords.longitude;  
            var latitude = position.coords.latitude;   
            document.write(longitude+","+longitude)
            console.log(longitude)
            console.log(latitude)
            },
            function (e) {
             var msg = e.code;
             var dd = e.message; 
            document.write(msg+","+dd)
             console.log(msg)
             console.log(dd)
        }
      ) 
   }