How to edit a popup in Leaflet.draw
<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>