“Google Maps Infowindow on Elover” Kod odpowiedzi

Google Maps Infowindow on Elover

marker.addListener('mouseover', function() {
    infowindow.open(map, this);
});

// assuming you also want to hide the infowindow when user mouses-out
marker.addListener('mouseout', function() {
    infowindow.close();
});