diff --git a/assets/stylesheets/pages/_mdn.scss b/assets/stylesheets/pages/_mdn.scss
index ee2f3329..0eaf7fd5 100644
--- a/assets/stylesheets/pages/_mdn.scss
+++ b/assets/stylesheets/pages/_mdn.scss
@@ -132,9 +132,10 @@
     dd { margin: 0; }
   }
 
+  // based on https://github.com/mdn/yari/blob/63936bc42c/client/src/document/interactive-examples.scss
   .interactive {
       width: 100%;
-      height: 680px;    
+      height: 680px;
       &.is-js-height {
         height: 520px;
       }