From 97586506fb861c9ca0af1e7fd4941ed0ec5b1b9b Mon Sep 17 00:00:00 2001
From: mrmr1993
Date: Wed, 8 Feb 2017 19:47:58 +0000
Subject: Guard against undefined (out of spec) getDestinationInsertionPoints

---
 lib/dom_utils.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/dom_utils.coffee b/lib/dom_utils.coffee
index fad5ffbf..500332e0 100644
--- a/lib/dom_utils.coffee
+++ b/lib/dom_utils.coffee
@@ -342,7 +342,7 @@ DomUtils =
   # If the element is rendered in a shadow DOM via a <content> element, the <content> element will be
   # returned, so the shadow DOM is traversed rather than passed over.
   getContainingElement: (element) ->
-    element.getDestinationInsertionPoints()[0] or element.parentElement
+    element.getDestinationInsertionPoints?()[0] or element.parentElement
 
   # This tests whether a window is too small to be useful.
   windowIsTooSmall: ->
-- 
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