From 8689c671f6d5ecf9266e374bee1b86b8b660d6a2 Mon Sep 17 00:00:00 2001
From: nschlehe <nschlehe@outlook.de>
Date: Wed, 21 Mar 2018 21:15:29 +0100
Subject: [PATCH] Add key prop to <br /> elements in html-serializer (#1704)

---
 packages/slate-html-serializer/src/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/slate-html-serializer/src/index.js b/packages/slate-html-serializer/src/index.js
index 0278350d2..94e88dfd8 100644
--- a/packages/slate-html-serializer/src/index.js
+++ b/packages/slate-html-serializer/src/index.js
@@ -54,7 +54,7 @@ const TEXT_RULE = {
   serialize(obj, children) {
     if (obj.object === 'string') {
       return children.split('\n').reduce((array, text, i) => {
-        if (i != 0) array.push(<br />)
+        if (i != 0) array.push(<br key={i} />)
         array.push(text)
         return array
       }, [])