Я обновил свойства набора сценариев: title: ''.
Обновлено , и оно заработало: http://jsfiddle.net/edf3gwuk/
var infowindow = new google.maps.InfoWindow();
function point(lat, long) {
var self = this;
self.name = name;
var marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, long),
title: '',
map: map,
draggable: true
});
google.maps.event.addListener(marker, 'mouseover', function (e) {
e.mb.target.removeAttribute('title')
//infowindow.setContent(marker.title);
//infowindow.open(map, marker);
}.bind(this));
google.maps.event.addListener(marker, 'mouseout', function () {
infowindow.close();
}.bind(this));
}
var map = new google.maps.Map(document.getElementById('googleMap'), {
zoom: 5,
center: new google.maps.LatLng(55, 11),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
new point(58, 14);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?key=&sensor=false"></script>
<section id="Map">
<div id="googleMap" style="width:350px;height:600px;"></div>
</section>
мое решение настроено на пустое содержимое этикетки