From 8c72cd5efb8360b18af419a0361b5bfc96dfb6b1 Mon Sep 17 00:00:00 2001
From: James Jackson <james@mooloop.com>
Date: Mon, 13 Aug 2018 12:27:23 +0100
Subject: [PATCH] Prevent error when there's no activeElement during undo/redo

---
 src/canvas/index.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/canvas/index.js b/src/canvas/index.js
index a14aad27c..42aea7942 100644
--- a/src/canvas/index.js
+++ b/src/canvas/index.js
@@ -363,7 +363,11 @@ module.exports = () => {
      * @return {Boolean}
      */
     isInputFocused() {
-      return this.getFrameEl().contentDocument.activeElement.tagName !== 'BODY';
+      let contentDocument = this.getFrameEl().contentDocument;
+      return (
+        contentDocument.activeElement &&
+        contentDocument.activeElement.tagName !== 'BODY'
+      );
     },
 
     /**