diff --git a/examples/todoapp/todoapp.nim b/examples/todoapp/todoapp.nim
index 99f70ea..7aa90d1 100644
--- a/examples/todoapp/todoapp.nim
+++ b/examples/todoapp/todoapp.nim
@@ -71,9 +71,6 @@ proc clearCompleted(ev: Event, n: VNode) =
 proc toClass(completed: bool): cstring =
   (if completed: cstring"completed" else: cstring(nil))
 
-proc toChecked(checked: bool): cstring =
-  (if checked: cstring"checked" else: cstring(nil))
-
 proc selected(v: Filter): cstring =
   (if filter == v: cstring"selected" else: cstring(nil))
 
diff --git a/karax/karax.nim b/karax/karax.nim
index d0ed73d..560d121 100644
--- a/karax/karax.nim
+++ b/karax/karax.nim
@@ -706,3 +706,9 @@ proc setInputText*(n: VNode; s: cstring) =
   ## Sets the text of input elements.
   n.text = s
   if n.dom != nil: n.dom.value = s
+
+proc toChecked*(checked: bool): cstring =
+  (if checked: cstring"checked" else: cstring(nil))
+
+proc toDisabled*(disabled: bool): cstring =
+  (if disabled: cstring"disabled" else: cstring(nil))