<active>

2 files changed, 9 insertions, 0 deletions

diff --git a/lib/js/urweb.js b/lib/js/urweb.js
index 35023924..87adc0a3 100644
--- a/lib/js/urweb.js
+++ b/lib/js/urweb.js
@@ -901,6 +901,12 @@ function setInnerHTML(node, html) {
     runScripts(node);
 }
 
+function active(s) {
+    var span = document.createElement("span");
+    addNode(span);
+    setInnerHTML(span, execF(s));
+}
+
 function input(x, s, recreate, type, name) {
     if (name) x.name = name;
     if (type) x.type = type;
diff --git a/lib/ur/basis.urs b/lib/ur/basis.urs
index 7f254a2f..8ac94668 100644
--- a/lib/ur/basis.urs
+++ b/lib/ur/basis.urs
@@ -767,6 +767,9 @@ val giveFocus : id -> transaction unit
 val dyn : ctx ::: {Unit} -> use ::: {Type} -> bind ::: {Type} -> [ctx ~ [Dyn]] => unit
           -> tag [Signal = signal (xml ([Dyn] ++ ctx) use bind)] ([Dyn] ++ ctx) [] use bind
 
+val active : unit
+             -> tag [Code = transaction xbody] body [] [] []
+
 val head : unit -> tag [] html head [] []
 val title : unit -> tag [] head [] [] []
 val link : unit -> tag [Id = id, Rel = string, Typ = string, Href = url, Media = string] head [] [] []