add special transitionend type to test event origin

fixes #13430

js/transition.js

@@ -40,7 +40,7 @@
   $.fn.emulateTransitionEnd = function (duration) {
     var called = false
     var $el = this
-    $(this).one($.support.transition.end, function () { called = true })
+    $(this).one('bsTransitionEnd', function () { called = true })
     var callback = function () { if (!called) $($el).trigger($.support.transition.end) }
     setTimeout(callback, duration)
     return this
@@ -48,6 +48,16 @@
 
   $(function () {
     $.support.transition = transitionEnd()
+
+    if (!$.support.transition) return
+
+    $.event.special.bsTransitionEnd = {
+      bindType: $.support.transition.end,
+      delegateType: $.support.transition.end,
+      handle: function (e) {
+        if ($(e.target).is(this)) return e.handleObj.handler.apply(this, arguments)
+      }
+    }
   })
 
 });