From 81dd8e9eb08d50ec4fa34248a85c967a18896883 Mon Sep 17 00:00:00 2001
From: Hyunje Alex Jun <me@noraesae.net>
Date: Thu, 5 Feb 2015 19:20:18 +0000
Subject: [PATCH] Add a guard to check if activeElement exists.

---
 src/js/plugin/handler/keyboard.js | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/js/plugin/handler/keyboard.js b/src/js/plugin/handler/keyboard.js
index 7159152..500da1c 100644
--- a/src/js/plugin/handler/keyboard.js
+++ b/src/js/plugin/handler/keyboard.js
@@ -50,12 +50,14 @@ function bindKeyboardHandler(element, i) {
     }
 
     var activeElement = document.activeElement ? document.activeElement : i.ownerDocument.activeElement;
-    // go deeper if element is a webcomponent
-    while (activeElement.shadowRoot) {
-      activeElement = activeElement.shadowRoot.activeElement;
-    }
-    if (h.isEditable(activeElement)) {
-      return;
+    if (activeElement) {
+      // go deeper if element is a webcomponent
+      while (activeElement.shadowRoot) {
+        activeElement = activeElement.shadowRoot.activeElement;
+      }
+      if (h.isEditable(activeElement)) {
+        return;
+      }
     }
 
     var deltaX = 0;