From bf31417781833ac50b43f896b0aadbb4cb3ee718 Mon Sep 17 00:00:00 2001
From: Taye Adeyemi <dev@taye.me>
Date: Mon, 29 Dec 2014 13:19:24 +0000
Subject: [PATCH] Add another matchesSelector polyfill

that works better with the shadow DOM polyfill
---
 interact.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/interact.js b/interact.js
index a440fc9df..23bd2bf91 100644
--- a/interact.js
+++ b/interact.js
@@ -5458,6 +5458,19 @@
     }
 
     function matchesSelector (element, selector, nodeList) {
+        // The CustomElements polyfill for Element.matches doesn't
+        // work with Shadow DOM selectors like :host, /deep/, etc.
+        if (window !== realWindow
+            && /:host|::content|::shadow|\/deep\//.test(selector)) {
+            var matches = (element.parentNode || element.ownerDocument).querySelectorAll(selector);
+
+            for (var i = 0; i < matches.length; i++) {
+                if (matches[i] === element) { return true; }
+            }
+
+            return false;
+        }
+
         if (ie8MatchesSelector) {
             return ie8MatchesSelector(element, selector, nodeList);
         }