Tweaking dyn() implementation to get grid working

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/js/urweb.js b/lib/js/urweb.js
index 4d8418b6..05d32e90 100644
--- a/lib/js/urweb.js
+++ b/lib/js/urweb.js
@@ -291,7 +291,8 @@ function dyn(s) {
 
       var old = node;
       node = node.nextSibling;
-      old.parentNode.removeChild(old);
+      if (old.parentNode)
+        old.parentNode.removeChild(old);
     }
 
     var cls = {v : null};
@@ -304,7 +305,8 @@ function dyn(s) {
     for (var node = first; node; ) {
       var old = node;
       node = node.nextSibling;
-      x.parentNode.insertBefore(old, x);
+      if (x.parentNode)
+        x.parentNode.insertBefore(old, x);
     }
   };