--- a/shared/src/main/scala/ngTags.scala	Fri Oct 13 13:51:50 2017 +0200
+++ b/shared/src/main/scala/ngTags.scala	Tue Nov 21 15:57:25 2017 +0100
@@ -77,6 +77,7 @@
   def onSelect(fun: String): Modifier = attr("on-select"):=fun
   def onRemove(fun: String): Modifier = attr("on-remove"):=fun
   def allowClear(b: Boolean): Modifier = attr("allow-clear"):=b
+  def groupBy(groupFn: String): Modifier = attr("group-by"):=groupFn
 }
 
 // vim: set ts=2 sw=2 et: