dist

js/dist/util.js

@@ -136,6 +136,28 @@
           }
         }
       }
+    },
+    findShadowRoot: function findShadowRoot(element) {
+      if (!document.documentElement.attachShadow) {
+        return null;
+      } // Can find the shadow root otherwise it'll return the document
+
+
+      if (typeof element.getRootNode === 'function') {
+        var root = element.getRootNode();
+        return root instanceof ShadowRoot ? root : null;
+      }
+
+      if (element instanceof ShadowRoot) {
+        return element;
+      } // when we don't find a shadow root
+
+
+      if (!element.parentNode) {
+        return null;
+      }
+
+      return Util.findShadowRoot(element.parentNode);
     }
   };
   setTransitionEndSupport();