From f12effc70c835e77bfdea394214df9247533d319 Mon Sep 17 00:00:00 2001
From: David Rothstein <drothstein@gmail.com>
Date: Mon, 12 Oct 2015 23:17:31 -0400
Subject: Issue #1592688 by jgtrescazes, tstoeckler, eric.chenchao, fietserwin,
 Heine, stefan.r, Dmitriy.trt, lachezar.valchev, bogdan khrupa: #states can
 cause the form "required" mark to appear more than once on the same element

---
 misc/states.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/misc/states.js b/misc/states.js
index 6d98da81b..5aac65d20 100644
--- a/misc/states.js
+++ b/misc/states.js
@@ -493,7 +493,11 @@ $(document).bind('state:disabled', function(e) {
 $(document).bind('state:required', function(e) {
   if (e.trigger) {
     if (e.value) {
-      $(e.target).closest('.form-item, .form-wrapper').find('label').append('<span class="form-required">*</span>');
+      var $label = $(e.target).closest('.form-item, .form-wrapper').find('label');
+      // Avoids duplicate required markers on initialization.
+      if (!$label.find('.form-required').length) {
+        $label.append('<span class="form-required">*</span>');
+      }
     }
     else {
       $(e.target).closest('.form-item, .form-wrapper').find('label .form-required').remove();
-- 
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