How do I pick up the location in the google maps api according to the user’s click?

Question

I entered the site google maps api and saw how to put and use the api on my site, but only managed to make you register a location according to what the user types. For a better experience, I wanted when the user clicked on some point on the map, that latitude and longitude were saved in the database. Does anyone have any idea how I can do that?

Note: It is not the location that the user is, but the one that they click.

Answer 1

<script>

    function initialize() {
       var latlng = new google.maps.LatLng(-19.949132746636568, -44.194307630538844);
        var map = new google.maps.Map(document.getElementById('map'), {
          center: latlng,
          zoom: 16,
          mapTypeId: google.maps.MapTypeId.ROADMAP
        });
        var marker = new google.maps.Marker({
          map: map,
          position: latlng,
          draggable: true,
          anchorPoint: new google.maps.Point(0, -29)
       });
        var input = document.getElementById('searchInput');
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
        var geocoder = new google.maps.Geocoder();
        var autocomplete = new google.maps.places.Autocomplete(input);
        autocomplete.bindTo('bounds', map);
        var infowindow = new google.maps.InfoWindow();   
        autocomplete.addListener('place_changed', function() {
            infowindow.close();
            marker.setVisible(false);
            var place = autocomplete.getPlace();
            if (!place.geometry) {
                window.alert("O local retornado pelo preenchimento automático não contém geometria!");
                return;
            }

            if (place.geometry.viewport) {
                map.fitBounds(place.geometry.viewport);
            } else {
                map.setCenter(place.geometry.location);
                map.setZoom(17);
            }

            marker.setPosition(place.geometry.location);
            marker.setVisible(true);          

            bindDataToForm(place.formatted_address,place.geometry.location.lat(),place.geometry.location.lng());
            infowindow.setContent(place.formatted_address);
            infowindow.open(map, marker);

        });
          google.maps.event.addListener(marker, 'dragend', function() {
            geocoder.geocode({'latLng': marker.getPosition()}, function(results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
              if (results[0]) {        
                  bindDataToForm(results[0].formatted_address,marker.getPosition().lat(),marker.getPosition().lng());
                  infowindow.setContent(results[0].formatted_address);
                  infowindow.open(map, marker);
              }
            }
            });
        });
    }
    function bindDataToForm(address,lat,lng){
       document.getElementById('location').value = address;
       document.getElementById('lat').value = lat;
       document.getElementById('lng').value = lng;
    }
    google.maps.event.addDomListener(window, 'load', initialize);
    </script>