Usefull wrapper module for Google Map API V3

mapper.js

/**
 * Usefull wrapper module for Google Map API V3
 * @param  {object} win
 * @param  {object} google
 * @return {object}
 *
 * Author: Ahmad Milzam (http://ahmadmilzam.com)
 */
var Mapper = (function(win, google){

  var moduleObj = {},
      deviceWidth = (win.innerWidth > 0) ? win.innerWidth : screen.width,
      isDraggable = deviceWidth >= 1024 ? true : false,
      map,
      marker,
      directionsService = new google.maps.DirectionsService(),
      directionsDisplay = new google.maps.DirectionsRenderer();


  var standardOptions = {
    center:{
      lat: -6.226787,
      lng: 106.80393
    },
    zoom: 16,
    scrollwheel: false,
    disableDefaultUI: true,
    draggable: isDraggable
  },
  userOptions;

  var checkGeolocationSupport = function(){
    if (navigator.geolocation){
      return true;
    }
    else{
      return false;
    }
  }

  var calcRoute = function(position){
    var start =  new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
    var end = new google.maps.LatLng(userOptions.center.lat, userOptions.center.lng);

    var request = {
      origin:start,
      destination:end,
      travelMode: google.maps.TravelMode.DRIVING
    };

    directionsService.route(request, function(result, status) {
      if (status == google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(result);
      }
      else{
        console.log("Can't calculate the route.");
      }
    });
  }

  // ini funtion yang ngejalanin calculate route nya, attach event listener ke funtion ini
  var getUserLocation = function(){
    if (navigator.geolocation) {
      navigator.geolocation.getCurrentPosition(calcRoute);
    }
    else {
      console.log("Geolocation is not supported by this browser.");
    }
  }

  var extend = function(out) {
    out = out || {};

    for (var i = 1; i < arguments.length; i++) {
      if (!arguments[i])
        continue;

      for (var key in arguments[i]) {
        if (arguments[i].hasOwnProperty(key))
          out[key] = arguments[i][key];
      }
    }

    return out;
  }

  moduleObj.checkGeolocationSupport = function(){
    return checkGeolocationSupport();
  }

  moduleObj.getUserLocation = function(){
    getUserLocation();
  }

  moduleObj.getUserOptions = function(){
    return userOptions;
  }

  moduleObj.create = function(el, opts){
    if (typeof google !== 'object' && typeof google.maps !== 'object')
    {
      console.log('Google map API is not loaded');
      return;
    }

    if (typeof opts === 'undefined' || typeof opts !== 'object'){
      userOptions = standardOptions;
    }
    else{
      userOptions = extend({}, standardOptions, opts);
    }

    map = new google.maps.Map(el, userOptions);
    directionsDisplay.setMap(map);

    // google.maps.event.addListener(directionsDisplay, 'directions_changed', function(){
    //   Layout.scrollTop();
    // });

    return map;
    // google.maps.event.addDomListener(window, 'load', create(selector, myLat, myLong));
  }

  return moduleObj;

}(window, google));