index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <title>createLayer_sublayer + infowindow</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
 <!-- include cartodb css  -->
    <link rel="stylesheet" href="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/themes/css/cartodb.css" />
    <!-- include cartodb.js library -->
     <script src="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/cartodb.js"></script>
     <style type="text/css">
     html,body,#map{
        width: 100%;
        height: 100%;
        margin: 0;
     }
     </style>
  </head>
  <body>
    <!-- define map object-->
    <div id="map"></div>

    <script>
      // define map object
      var map;

      function main() {
      //define map properties
        map = L.map('map', {
          zoomControl: true,
          center: [-22.6285913, -42.9358045],
          zoom: 3
        });
      // add OSM basemap to the map object
        L.tileLayer('http://{s}.basemaps.cartocdn.com/light_nolabels/{z}/{x}/{y}.png', {attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, &copy; <a href="http://cartodb.com/attributions">CartoDB</a>'}).addTo(map);

        var sublayers = [];

        var style = [
            '#world_borders{',
            '  polygon-fill: #1a9850;',
            '  polygon-opacity: 0.8;',
            ' line-color: #FFF;',
            ' line-width: 0.5;',
            ' line-opacity: 1;',
            '}'
        ].join('\n')
        cartodb.createLayer(map, {
            user_name: 'documentation',
            type: 'cartodb',
             sublayers: [
               {
                 sql: 'select * from world_table',
                 cartocss: style
             }
           ],
         }, {https:true})
         .addTo(map)
         .done(function(layers) {

          // define sublayer
          var sublayer = layers.getSubLayer(0);

          // add infowindow interactivity to the sublayer (show cartodb_id and name columns from the table)
           cartodb.vis.Vis.addInfowindow(map, sublayer, ['name']);

        // add basemap
         L.tileLayer('http://{s}.basemaps.cartocdn.com/light_only_labels/{z}/{x}/{y}.png',{
           attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, &copy; <a href="http://cartodb.com/attributions">CartoDB</a>',zIndex:100
          }).addTo(map);
        })
      }

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