re-render on window resize

src/modules/graph.coffee

@@ -76,8 +76,10 @@ module.exports =
 
     # Render the D3 chart.
     'render': ([ actual, ideal ], cb) ->
+        (target = document.querySelector('#graph')).innerHTML = ''
+
         # Get available space.    
-        { height, width } = document.querySelector('#graph').getBoundingClientRect()
+        { height, width } = target.getBoundingClientRect()
 
         margin = { top: 30, right: 30, bottom: 40, left: 50 }
         width -= margin.left + margin.right

src/modules/repo.coffee

@@ -80,6 +80,9 @@ class exports.Repo
                 render '#progress', 'progress', { progress }
 
                 # Render the chart.
-                graph.render values, cb
+                do doit = -> graph.render values, cb
+
+                # Watch window resize?
+                window.onresize = doit if 'onresize' of window
 
         ], cb