acf-google-map.js added "set zoom" feature

acf-google-map.js

(function ($) {

    function render_map($el) {

        var $markers = $el.find('.marker');
        
        // Add custom data-zoom
        window.gmapzoom = parseInt($markers.attr('data-zoom'));
        if ( isNaN(window.gmapzoom) ) { window.gmapzoom = 16; }

        var args = {
            zoom: window.gmapzoom,
            center: new google.maps.LatLng(0, 0),
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };

        var map = new google.maps.Map($el[0], args);

        map.markers = [];

        $markers.each(function () {
            add_marker($(this), map);
        });

        center_map(map);
    }

    function add_marker($marker, map) {

        var latlng = new google.maps.LatLng($marker.attr('data-lat'), $marker.attr('data-lng'));

        var marker = new google.maps.Marker({
            position: latlng,
            map: map
        });

        map.markers.push(marker);

        if ($marker.html()) {

            var infowindow = new google.maps.InfoWindow({
                content: $marker.html()
            });

            google.maps.event.addListener(marker, 'click', function () {
                infowindow.open(map, marker);
            });
        }
    }

    function center_map(map) {

        var bounds = new google.maps.LatLngBounds();

        $.each(map.markers, function (i, marker) {
            var latlng = new google.maps.LatLng(marker.position.lat(), marker.position.lng());
            bounds.extend(latlng);
        });

        if (map.markers.length == 1) {
            map.setCenter(bounds.getCenter());
            map.setZoom(window.gmapzoom);

        } else {
            map.fitBounds(bounds);
        }

    }

    $(document).ready(function () {

        $('.acf-map').each(function () {
            render_map($(this));
        });

    });

})(jQuery);