I found the solution in this article
https://itsmereal.com/advanced-custom-fields-google-map-markers-with-filters/
Google Maps JS file
(function($) {
/*
* new_map
*
* This function will render a Google Map onto the selected jQuery element
*
* @type function
* @date 8/11/2013
* @since 4.3.0
*
* @param $el (jQuery element)
* @return n/a
*/
function new_map( $el ) {
// var
var $markers = $el.find('.marker');
// vars
var args = {
zoom : 16,
center : new google.maps.LatLng(0, 0),
mapTypeId : google.maps.MapTypeId.ROADMAP
};
// create map
var map = new google.maps.Map( $el[0], args);
// add a markers reference
map.markers = [];
// add markers
$markers.each(function(){
add_marker( $(this), map );
});
// center map
center_map( map );
// return
return map;
}
/*
* add_marker
*
* This function will add a marker to the selected Google Map
*
* @type function
* @date 8/11/2013
* @since 4.3.0
*
* @param $marker (jQuery element)
* @param map (Google Map object)
* @return n/a
*/
function add_marker( $marker, map ) {
// var
var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );
var icon = $marker.attr('data-img');
var type = $marker.attr('data-type');
// create marker
var marker = new google.maps.Marker({
position : latlng,
map : map,
icon : icon,
type : type
});
// add to array
map.markers.push( marker );
// if marker contains HTML, add it to an infoWindow
if( $marker.html() )
{
// create info window
var infowindow = new google.maps.InfoWindow({
content : $marker.html()
});
// show info window when marker is clicked
google.maps.event.addListener(marker, 'click', function() {
infowindow.open( map, marker );
});
}
}
/*
* Marker Filter - NEW!
*/
filterMarker = function (id) {
for (i = 0; i < map.markers.length; i++) {
marker = map.markers[i];
if (document.getElementById(id).checked) {
if (marker.type == id) {
marker.setVisible(true);
}
} else {
if (marker.type == id) {
marker.setVisible(false);
}
}
}
}
/*
* center_map
*
* This function will center the map, showing all markers attached to this map
*
* @type function
* @date 8/11/2013
* @since 4.3.0
*
* @param map (Google Map object)
* @return n/a
*/
function center_map( map ) {
// vars
var bounds = new google.maps.LatLngBounds();
// loop through all markers and create bounds
$.each( map.markers, function( i, marker ){
var latlng = new google.maps.LatLng( marker.position.lat(), marker.position.lng() );
bounds.extend( latlng );
});
// only 1 marker?
if( map.markers.length == 1 )
{
// set center of map
map.setCenter( bounds.getCenter() );
map.setZoom( 16 );
}
else
{
// fit to bounds
map.fitBounds( bounds );
}
}
/*
* document ready
*
* This function will render each map when the document is ready (page has loaded)
*
* @type function
* @date 8/11/2013
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
// global var
var map = null;
$(document).ready(function(){
$('.acf-map').each(function(){
// create map
map = new_map( $(this) );
});
//zoom
google.maps.event.addListener( map, 'zoom_changed', function( e ) {
var zoom = map.getZoom();
if(zoom!= 5)
{
var bounds = map.getBounds();
myLatLngss = [];
$.each( map.markers, function( i, marker ){
var myLatLng = new google.maps.LatLng(marker.position.lat(), marker.position.lng() );
if(bounds.contains(myLatLng)===true) {
myLatLngss.push( myLatLng );
}
else {
}
});
if(myLatLngss.length > 0)
{
document.cookie = "coordn="+myLatLngss;
$("#customzm").load(location.href + " #customzm");
}
}
});
google.maps.event.addListener(map, 'dragend', function() {
//alert('map dragged');
var bounds = map.getBounds();
myLatLngss = [];
$.each( map.markers, function( i, marker ){
var myLatLng = new google.maps.LatLng(marker.position.lat(), marker.position.lng() );
if(bounds.contains(myLatLng)===true) {
myLatLngss.push( myLatLng );
}
else {
}
if(myLatLngss.length > 0)
{
document.cookie = "coordn="+myLatLngss;
$("#customzm").load(location.href + " #customzm");
}
});
} );
});
})(jQuery);
