title: How to use leaflet markerclusterGroup?
body: <p>I want to create a leaflet marker cluster group and I want to add all the markers, and for that I have written the below-mentioned code. But I am getting the error <code>TypeError: L.markerClusterGroup is not a constructor</code></p>
  <p>I am not getting that there is an error in the scripting or in the code that I have written</p>
  <pre><code>&lt;link rel=&quot;stylesheet&quot; href=&quot;https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.css&quot;&gt;
  &lt;script src=&quot;https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.js&quot;&gt;&lt;/script&gt;
  &lt;link rel=&quot;stylesheet&quot; href=&quot;https://unpkg.com/leaflet.markercluster@1.0.3/dist/MarkerCluster.css&quot;&gt;
  
  &lt;script src=&quot;https://unpkg.com/leaflet.markercluster@1.3.0/dist/leaflet.markercluster.js&quot;&gt;&lt;/script&gt;
  &lt;script src='https://unpkg.com/leaflet.markercluster@1.3.0/dist/leaflet.markercluster-src.js'&gt;&lt;/script&gt;
  </code></pre>
  <pre class="lang-js prettyprint-override"><code>var markers = L.markerClusterGroup();
  markers.addLayer(L.marker(getRandomLatLng(map)));
  map.addLayer(markers);
  </code></pre>