From 365d12c18511a70acc2bf5488529ff7b377ac915 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Mon, 13 May 2019 16:53:44 +0300
Subject: [PATCH] check presence of overlap[i]

---
 apps/block_scout_web/assets/js/lib/list_morph.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/block_scout_web/assets/js/lib/list_morph.js b/apps/block_scout_web/assets/js/lib/list_morph.js
index 4f3b0736c4..175acb7c3f 100644
--- a/apps/block_scout_web/assets/js/lib/list_morph.js
+++ b/apps/block_scout_web/assets/js/lib/list_morph.js
@@ -42,8 +42,8 @@ export default function (container, newElements, { key, horizontal } = {}) {
 
   // update kept items
   currentList = currentList.map(({ el }, i) => ({
-    id: overlap[i].id,
-    el: el.outerHTML === overlap[i].el.outerHTML ? el : morph(el, overlap[i].el)
+    id: overlap[i] && overlap[i].id,
+    el: el.outerHTML === overlap[i] && overlap[i].el && overlap[i].el.outerHTML ? el : morph(el, overlap[i].el)
   }))
 
   // add new items