check presence of overlap[i]

6 years ago · 365d12c185
parent 00e46e5fba
commit 365d12c185
1 changed files with 2 additions and 2 deletions
--- 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