https://www.klo.ua/wp-content/plugins/map-multi-marker/asset/js/front.js?ver=3.2.1

1/* global mmm_maps, mmm_localize  */
2
3var map;
4
5/**
6 * Init google map api
7 */
8(function () {
9    for (var i = 0; i < mmm_maps.length; i++) {
10        map        = new google.maps.Map(document.getElementById('map-multi-marker-' + mmm_maps[i].map_id), mmm_maps[i].map_option);
11        infoWindow = new google.maps.InfoWindow();
12        // Close event
13        google.maps.event.addListener(map, 'click', function () {
14            infoWindow.close();
15        });
16        // Resize event
17        window.onresize = function () {
18            var center = map.getCenter();
19            google.maps.event.trigger(map, "resize");
20            map.setCenter(center);
21        };
22        // Set markers
23        var markers     = mmm_maps[i].markers;
24        for (var j = 0; j < markers.length; j++) {
25            set_markers(markers[j].id, new google.maps.LatLng(markers[j].lat, markers[j].lng), markers[j].icon);
26        }
27    }
28}());
29
30/**
31 * Set markers
32 * @param id
33 * @param latLng
34 * @param icon
35 */
36function set_markers(id, latLng, icon) {
37    var marker = new google.maps.Marker({
38        position: latLng,
39        map: map,
40        icon: icon
41    });
42    // Event click
43    google.maps.event.addListener(marker, 'click', function () {
44        // Open tooltip
45        infoWindow.open(map, marker);
46        //Add loader
47        infoWindow.setContent('<div id="infobulle"><div class="loader-marker-c" style="padding: 30px 20px 30px 40px;text-align:center;"><i class="fa fa-refresh fa-spin fa-3x fa-fw" style="color:#C7C7C7;"></i><span class="sr-only"></span></div></div>');
48        // Async request
49        var xhr = new XMLHttpRequest();
50        xhr.open('POST', mmm_localize.ajax_url, true);
51        xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
52        xhr.send('action=mmm_async_content_marker&id=' + id);
53        xhr.onload = function () {
54            if (xhr.status >= 200 && xhr.status < 400) {
55                // Success!
56                var response = xhr.responseText;
57                infoWindow.setContent('<div id="infobulle">' + response + '</div>');
58            }
59        };
60    });
61}