How to hide InfoWindow on mouseout event from it?

Question

JavaScript

Tell me, plz
There is a regular Google map with markers

var marker = new google.maps.Marker({
                                map: map, position: latlngset,
                                animation: google.maps.Animation.DROP,
                                category: IsBuild
                            });

When hovering over a marker, a tooltip pops up

google.maps.event.addListener(marker, 'mouseover', (function (marker, content, infowindow) {
                                return function () {
                                    if (content != null && content != "") {
                                        infowindow.setContent(content);
                                        infowindow.open(map, marker);

                                        if (marker.getAnimation() !== null) {
                                            marker.setAnimation(null);
                                        } else {
                                            marker.setAnimation(google.maps.Animation.BOUNCE);
                                            console.log(content);
                                        }
                                    }


                                };
                            })(marker, content, infowindow));

How to implement such that when the mouse leaves the marker or tooltip, the tooltip disappears.
But if the mouse left the tooltip, but remained on the marker, it did not disappear.
In jquery, a similar task is solved using nested divs via mouseenter/mouseleave.
I thought about creating custom hints, and already hanging handlers on them marcgrabanski.com/jquery-google-maps-tutorial-basics
But it's still not clear how to keep track that we are still on the marker. Is that to check the latitude and longitude, but it's somehow crooked.