From 11dc1d023d1db63e9efbb320ddaeec9a91c45fb4 Mon Sep 17 00:00:00 2001
From: Steven D Vachon <contact@svachon.com>
Date: Wed, 26 Apr 2017 23:56:03 -0400
Subject: [PATCH] Add cross-realm Date support

---
 lib/chai-subset.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/chai-subset.js b/lib/chai-subset.js
index 456d72b..c20f7a7 100644
--- a/lib/chai-subset.js
+++ b/lib/chai-subset.js
@@ -58,8 +58,8 @@
 				});
 			}
 
-			if (expected instanceof Date) {
-				if (actual instanceof Date) {
+			if (toString.call(expected) === '[object Date]') {
+				if (toString.call(actual) === '[object Date]') {
 					return expected.getTime() === actual.getTime();
 				} else {
 					return false;