From b16127fc105f159ebd06b02df2853941b2aba67c Mon Sep 17 00:00:00 2001
From: Johann-S <johann.servoire@gmail.com>
Date: Thu, 30 Nov 2017 10:54:27 +0100
Subject: Allow Tooltips/Popovers to work in shadow DOM

---
 js/src/util.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'js/src/util.js')

diff --git a/js/src/util.js b/js/src/util.js
index e9665d24f..1d804cf9d 100644
--- a/js/src/util.js
+++ b/js/src/util.js
@@ -142,6 +142,29 @@ const Util = {
         }
       }
     }
+  },
+
+  findShadowRoot(element) {
+    if (!document.documentElement.attachShadow) {
+      return null
+    }
+
+    // Can find the shadow root otherwise it'll return the document
+    if (typeof element.getRootNode === 'function') {
+      const 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)
   }
 }
 
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