original display fixes for boolean turn off and on

static/nb.js

@@ -267,7 +267,12 @@ function nbInit(a,b){
 
 function nbGetData(el){
     while (!('nbData' in el)){
-        el = el.parentElement || return null;
+        if (el.parentElement){
+            el = el.parentElement;
+        }
+        else {
+            return null;
+        }
     }
     return el.nbData;
 }