Google map marker dragend ไม่ขึ้นพิกัดใน input แก้ไขไงดีครับ

function initAutocomplete() {
        var my_Latlng = new google.maps.LatLng(7.8803886,98.3931279);
        var map = new google.maps.Map(document.getElementById('map'), {
            center: my_Latlng,
            zoom: 13,
            mapTypeId: 'roadmap'
        });

        // Create the search box and link it to the UI element.
        var input = document.getElementById('pac-input');
        var searchBox = new google.maps.places.SearchBox(input);
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
        /*addMarker(myLatlng, 'Default Marker', map);*/
        // Bias the SearchBox results towards current map's viewport.
        map.addListener('bounds_changed', function() {
            searchBox.setBounds(map.getBounds());
        });
        var markers = [];
        // Listen for the event fired when the user selects a prediction and retrieve
        // more details for that place.
        searchBox.addListener('places_changed', function() {
            var places = searchBox.getPlaces();

            if (places.length == 0) {
                return;
            }
            // Clear out the old markers.
            markers.forEach(function(marker) {
                marker.setMap(null);
            });
            markers = [];
            // For each place, get the icon, name and location.
            var bounds = new google.maps.LatLngBounds(my_Latlng);
            places.forEach(function(place) {
                if (!place.geometry) {
                    console.log("Returned place contains no geometry");
                    return;
                }

                // Create a marker for each place.
                markers.push(new google.maps.Marker({
                    map: map,
                    title: place.name,
                    draggable:true,
                    animation: google.maps.Animation.DROP,
                    position: place.geometry.location
                }));

                if (place.geometry.viewport) {
                    // Only geocodes have viewport.
                    bounds.union(place.geometry.viewport);
                } else {
                    bounds.extend(place.geometry.location);
                }
               console.log('1'+bounds);
                console.log('2'+markers);
                console.log('3'+map);
                document.getElementById("latitude").value = place.geometry.location.lat();
                document.getElementById("longitude").value = place.geometry.location.lng();
                
                google.maps.event.addListener(bounds, 'dragend', function (event) {
                    document.getElementById("latitude").value = place.geometry.location.lat();
                    document.getElementById("longitude").value = place.geometry.location.lng();
                });
                
            });
            map.fitBounds(bounds);
        });
    }