From 9587bc4a5094a8b6be4d232957f1c7f8e92899fd Mon Sep 17 00:00:00 2001
From: David O'Trakoun <davidosomething@users.noreply.github.com>
Date: Tue, 10 Oct 2017 01:00:42 -0400
Subject: [PATCH] Sanitize tagName check (#1212)

`In XML (and XML-based languages such as XHTML), tagName preserves case. On HTML elements in DOM trees flagged as HTML documents, tagName returns the element name in the uppercase form.`
---
 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 b7e689963..99b5fe7e1 100644
--- a/packages/slate-html-serializer/src/index.js
+++ b/packages/slate-html-serializer/src/index.js
@@ -27,7 +27,7 @@ const String = new Record({
 const TEXT_RULE = {
 
   deserialize(el) {
-    if (el.tagName == 'br') {
+    if (el.tagName.toLowerCase() == 'br') {
       return {
         kind: 'text',
         ranges: [{ text: '\n' }],