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Marker animations with setTimeout()

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JavaScript
// If you're adding a number of markers, you may want to drop them on the map
// consecutively rather than all at once. This example shows how to use
// window.setTimeout() to space your markers' animation.

var berlin = new google.maps.LatLng(52.520816, 13.410186);

var neighborhoods = [
  new google.maps.LatLng(52.511467, 13.447179),
  new google.maps.LatLng(52.549061, 13.422975),
  new google.maps.LatLng(52.497622, 13.396110),
  new google.maps.LatLng(52.517683, 13.394393)
];

var markers = [];
var map;

function initialize() {
  var mapOptions = {
    zoom: 12,
    center: berlin
  };

  map = new google.maps.Map(document.getElementById('map-canvas'),
          mapOptions);
}

function drop() {
  clearMarkers();
  for (var i = 0; i < neighborhoods.length; i++) {
    addMarkerWithTimeout(neighborhoods[i], i * 200);
  }
}

function addMarkerWithTimeout(position, timeout) {
  window.setTimeout(function() {
    markers.push(new google.maps.Marker({
      position: position,
      map: map,
      animation: google.maps.Animation.DROP
    }));
  }, timeout);
}

function clearMarkers() {
  for (var i = 0; i < markers.length; i++) {
    markers[i].setMap(null);
  }
  markers = [];
}

google.maps.event.addDomListener(window, 'load', initialize);
JavaScript + HTML
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Marker animations with <code>setTimeout()</code></title>
    <style>
      html, body, #map-canvas {
        height: 100%;
        margin: 0;
        padding: 0;
      }

      #panel {
        position: absolute;
        top: 5px;
        left: 50%;
        margin-left: -180px;
        z-index: 5;
        background-color: #fff;
        padding: 5px;
        border: 1px solid #999;
      }

      /*
      Provide the following styles for both ID and class,
      where ID represents an actual existing "panel" with
      JS bound to its name, and the class is just non-map
      content that may already have a different ID with
      JS bound to its name.
      */

      #panel, .panel {
        font-family: 'Roboto','sans-serif';
        line-height: 30px;
        padding-left: 10px;
      }

      #panel select, #panel input, .panel select, .panel input {
        font-size: 15px;
      }

      #panel select, .panel select {
        width: 100%;
      }

      #panel i, .panel i {
        font-size: 12px;
      }

    </style>
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true"></script>
    <script>
// If you're adding a number of markers, you may want to drop them on the map
// consecutively rather than all at once. This example shows how to use
// window.setTimeout() to space your markers' animation.

var berlin = new google.maps.LatLng(52.520816, 13.410186);

var neighborhoods = [
  new google.maps.LatLng(52.511467, 13.447179),
  new google.maps.LatLng(52.549061, 13.422975),
  new google.maps.LatLng(52.497622, 13.396110),
  new google.maps.LatLng(52.517683, 13.394393)
];

var markers = [];
var map;

function initialize() {
  var mapOptions = {
    zoom: 12,
    center: berlin
  };

  map = new google.maps.Map(document.getElementById('map-canvas'),
          mapOptions);
}

function drop() {
  clearMarkers();
  for (var i = 0; i < neighborhoods.length; i++) {
    addMarkerWithTimeout(neighborhoods[i], i * 200);
  }
}

function addMarkerWithTimeout(position, timeout) {
  window.setTimeout(function() {
    markers.push(new google.maps.Marker({
      position: position,
      map: map,
      animation: google.maps.Animation.DROP
    }));
  }, timeout);
}

function clearMarkers() {
  for (var i = 0; i < markers.length; i++) {
    markers[i].setMap(null);
  }
  markers = [];
}

google.maps.event.addDomListener(window, 'load', initialize);

    </script>
  </head>
  <body>
    <div id="panel" style="margin-left: -52px">
      <button id="drop" onclick="drop()">Drop Markers</button>
     </div>
    <div id="map-canvas"></div>
  </body>
</html>

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