title: How to edit a popup in Leaflet.draw
body: <p>I am using Leaflet and Leaflet.draw to create a map.  When I draw a rectangle on the map (as a user), the following code writes out the LatLng bounds of the rectangle.</p>
  
  <pre><code>    // add the newly drawn items to a layer
      map.on('draw:created', function (e) {
          var type = e.layerType,
              layer = e.layer;
  
          // binds things upon creation
          if (type === 'rectangle') {
              var bounds = layer.getBounds();
              layer.bindPopup(bounds.getNorthWest().toString() + "NW" + bounds.getSouthEast().toString() + "SE");
          }
  
          drawnItems.addLayer(layer);
      });
  </code></pre>
  
  <p>I want to update this when the rectangle is edited by the user.  I think that something like this should be updated using the 'draw:edited' event and '_popup.SetContent', but the LatLng in the  does not update.</p>
  
  <pre><code>    // update LatLng when edited
      map.on('draw:edited', function (e) {
          var type = e.layerType,
              layer = e.layer;
  
          // update popup
          if (type === 'rectangle') {
              var bounds = layer.getBounds();
              layer._popup.SetContent(bounds.getNorthWest().toString() + "NW" + bounds.getSouthEast().toString() + "SE");
          }
      });
  </code></pre>
  
  <p>Adding that second code block also means that I can only edit the first rectangle ever created.  So it's clearly not working, but I don't know why.</p>