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<!DOCTYPE html>
<html>
<head>
<meta name="description" content="Google Maps JSBin">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
  <div id="map"></div>
  <button onclick="handlers.randomMarkerButtonClicked()" id="random-marker-button">Place Random Marker</button>
  <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=map.initMap"
    async defer></script>
</body>
</html>
 
var map = {
  map: null,
  marker: null,
  initMap: function() {
    this.map = new google.maps.Map(document.getElementById('map'), {
      center: {lat: 50, lng: 10},
      zoom: 3
    });
  },
  placeOutOfBoundsMarker: function() {
    if (this.marker) this.marker.setMap(null);
​
    var markerOptions = {
      map: this.map,
      position: helpers.getRandomPosition(this.map)
    };
​
    this.marker = new google.maps.Marker(markerOptions);
  },
  panToMarker: function() {
    var infoWindow = new google.maps.InfoWindow();
    infoWindow.open(this.map, this.marker);
    google.maps.event.addListenerOnce(this.map, 'center_changed', function() {
      infoWindow.close();
    });
  }
};
​
var helpers = {
  getRandomPosition: function(map) {
    var randomLatLng = this.getRandomLatLng();
    var mapBounds = map.getBounds();
    while (mapBounds.contains(randomLatLng)) {
      randomLatLng = this.getRandomLatLng();
    }
    return randomLatLng;
  },
  getRandomLatLng: function() {
    var randomLat = this.getRandomNumber(-90, 90);
    var randomLng = this.getRandomNumber(-180, 180);
    return {lat: randomLat, lng: randomLng};
  },
  getRandomNumber: function(min, max) {
    return Math.random() * (max - min) + min;
  },
};
​
var handlers = {
  randomMarkerButtonClicked: function() {
    map.placeOutOfBoundsMarker();
    map.panToMarker();
  }
};
Output 300px

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ivdekovpro
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