1 files changed, 13 insertions, 0 deletions
diff --git a/lib/js/urweb.js b/lib/js/urweb.js
index fe628130..ac9e9771 100644
--- a/lib/js/urweb.js
+++ b/lib/js/urweb.js
@@ -1942,6 +1942,19 @@ function bless(s) {
 }
 
 
+// Attribute name blessing
+
+function blessData(s) {
+    for (var i = 0; i < s.length; ++i) {
+        var c = s[i];
+        if (!isAlnum(c) && c != '-' && c != '_')
+            er("Disallowed character in data-* attribute name");
+    }
+
+    return s;
+}
+
+
 // CSS validation
 
 function atom(s) {