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How to detect zooming in Microsoft Bing Maps

I am trying to detect when the zoom has changed on my map, I tried to use them:

Microsoft.Maps.Events.addHandler(map, "targetviewchanged", console.log('targetviewchanged'));
Microsoft.Maps.Events.addHandler(map, "viewchangestart", console.log('viewchangestart'));

but only starts once when the card changes

How can I detect only a zoom change?

Thank you in advance

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1 answer

Try the following:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
   <head>
      <title>Event view change start</title>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
      <script type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=7.0"></script>

      <script type="text/javascript">
      var map, lastZoomLevel = 0;

      function getMap()
      {
        map = new Microsoft.Maps.Map(document.getElementById('myMap'), {credentials: 'Your Bing Maps Key'});

        lastZoomLevel = map.getZoom();
        Microsoft.Maps.Events.addHandler(map, 'viewchangeend', viewChanged);
      }

      function viewChanged(e)
      {
         if(lastZoomLevel != map.getZoom()){
            lastZoomLevel = map.getZoom();
            alert("Map Zoomed");
         }
      }
      </script>
   </head>
   <body onload="getMap();">
      <div id='myMap' style="; width:400px; height:400px;"></div>
   </body>
</html>
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