examples/cursor_interaction.html

<!DOCTYPE html>
<html>
  <head>
    <title>Leaflet example | CartoDB.js</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
    <link rel="shortcut icon" href="http://cartodb.com/assets/favicon.ico" />
    <style>
      html, body, #map {
        height: 100%;
        padding: 0;
        margin: 0;
      }
    </style>
    <link rel="stylesheet" href="http://libs.cartocdn.com/cartodb.js/v3/themes/css/cartodb.css" />
    <!--[if lte IE 8]>
      <link rel="stylesheet" href="http://libs.cartocdn.com/cartodb.js/v2/themes/css/cartodb.ie.css" />
    <![endif]-->
  </head>
  <body>
    <div id="map"></div>
    
    <!-- include cartodb.js library -->
    <script src="http://libs.cartocdn.com/cartodb.js/v3/cartodb.uncompressed.js"></script>

    <script>
      function main() {

        var map = new L.Map('map', {
          zoomControl: false,
          center: [43, 0],
          zoom: 3
        });

        L.tileLayer('http://{s}.api.cartocdn.com/base-light/{z}/{x}/{y}.png', {
          attribution: 'CartoDB'
        }).addTo(map);

        cartodb.createLayer(map, 'http://documentation.cartodb.com/api/v2/viz/2b13c956-e7c1-11e2-806b-5404a6a683d5/viz.json', {
          infowindow: false
        })
         .addTo(map)
         .on('done', function(layer) {
          // interaction should be enabled
          var subLayer = layer.getSubLayer(0)
          subLayer.setInteraction(true);
          cdb.vis.Vis.addCursorInteraction(map, subLayer);
          // undo with removeCursorInteraction
        })
      }

      window.onload = main;
    </script>
  </body>
</html>