Question

I have searched all over google for a solution however this seems a new one? I am trying to implement google maps API on a site however I keep getting the following error:

Uncaught TypeError: Cannot call method ‘apply’ of undefined

My JS is as follows:

        var map;
        function initialize(location) {
            var mapDiv = document.getElementById('map-canvas');
            var latLng;
            if (location == 0) {
                latLng = new google.maps.LatLng(52.066356, 1.102388);
            }
            else if (location == 1) {
                latLng = new google.maps.LatLng(52.672492, 1.232196);
            }
            else if (location == 2) {
                latLng = new google.maps.LatLng(52.207607, 0.123017);
            }
            map = new google.maps.Map(mapDiv, {
                center: latLng,
                zoom: 14,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            });

            google.maps.event.addDomListener(map, 'tilesloaded', addMarker(location));

        }

        function addMarker(location) {
            var latLng;
            if (location == 0) {
                latLng = new google.maps.LatLng(52.066703, 1.113573);
            }
            else if (location == 1) {
                latLng = new google.maps.LatLng(52.672492, 1.232196);
            }
            else if (location == 2) {
                latLng = new google.maps.LatLng(52.207607, 0.123017);
            }
            var marker = new google.maps.Marker({
                position: latLng,
                map: map
            });
        }

        $(document).ready(function () {
            initialize(0);
        });

Answer 1

In this line

google.maps.event.addDomListener(map, 'tilesloaded', addMarker(location));

You’re calling the function addMarker instead of passing it as a function reference. Therefore, addMarker is getting executed before map is defined. Try changing that line to:

google.maps.event.addDomListener(map, 'tilesloaded', function() {addMarker(location)});