From 8b8b12c5fcbabf498fd3abf796ebdef92bc9f282 Mon Sep 17 00:00:00 2001
From: Bruno Dias <dias.h.bruno@gmail.com>
Date: Fri, 14 May 2021 11:17:45 -0300
Subject: [PATCH] [fixed] `appElement` detection...

We can't use window.HTMLElement to check the `appElement`
when combined in a iframe.

window.HTMLElement !== window.HTMLElement (on the iframe)
---
 src/helpers/safeHTMLElement.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/helpers/safeHTMLElement.js b/src/helpers/safeHTMLElement.js
index 8ae67884..384f0d05 100644
--- a/src/helpers/safeHTMLElement.js
+++ b/src/helpers/safeHTMLElement.js
@@ -2,7 +2,18 @@ import ExecutionEnvironment from "exenv";
 
 const EE = ExecutionEnvironment;
 
-const SafeHTMLElement = EE.canUseDOM ? window.HTMLElement : {};
+const NodeTypeElement = 1;
+
+const IHTMLElement = function(props, propName) {
+  const element = props[propName];
+  return (
+    element.nodeType === NodeTypeElement &&
+    element.setAttribute &&
+    element.removeAttribute
+  );
+};
+
+const SafeHTMLElement = EE.canUseDOM ? IHTMLElement : {};
 
 export const SafeHTMLCollection = EE.canUseDOM ? window.HTMLCollection : {};