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Add Center Changed Event Listener on Google Maps

In this example you will learn how to add center changed Event Listener to google map. This event fires when the map center property changes.

Here you can view the output of the example and you can also "try it yourself" by clicking on "Live Demo" button given at the bottom.

Syntax

map.addListener('center_changed', function() {  
    // 3 seconds after the center of the map has changed, pan back to the
    document.getElementById('panel').innerHTML  = 'Center Changed';
    window.setTimeout(function() {  
      document.getElementById('panel').innerHTML = '';
    }, 2000);  
  }); 

Add Center Changed Event Listener on Google Maps Example

<!DOCTYPE html>  
<html>  
  <head>  <!-- www.techstrikers.com -->  
    <title>Center Changed Event</title>  
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">  
    <meta charset="utf-8">  
    <style>  
      html, body {  
        height: 100%;  
        margin: 0;  
        padding: 0;  
      }  
      #map {  
        height: 99%;
        width: 99%;
      }
#panel {    
  position: absolute;    
  top: 230px;    
  left: 40%;    
  z-index: 5;    
  padding: 0px;    
  border: 0px solid #999;    
  text-align: center; 
  background:#0000FF;
  width:150px;
  color:#fff;
}    
 
#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?signed_in=true&callback=initMap" async defer>  
    </script>  
    <script>  
function initMap() {  
  var lat_lng = {lat: 22.08672, lng: 79.42444};   
  
  var map = new google.maps.Map(document.getElementById('map'), {  
    zoom: 6,  
    center: lat_lng  
  });  
  
  map.addListener('center_changed', function() {  
    // 3 seconds after the center of the map has changed, pan back to the
    document.getElementById('panel').innerHTML  = 'Center Changed';
    window.setTimeout(function() {  
      document.getElementById('panel').innerHTML = '';
    }, 2000);  
  });  
}  
  </script>  
  </head>  
  <body> 
    <div id="panel"></div>
    <div id="map"></div>  
  </body>  
</html>

Above example will produce following output