From 76f7a758e1083660f77e209aa86e1f53ef1fe758 Mon Sep 17 00:00:00 2001
From: Pavel Dohnal <pavel@mailpoet.com>
Date: Mon, 4 May 2020 14:46:42 +0200
Subject: [PATCH] Prevent reseting height to NaN

[MAILPOET-2835]
---
 assets/js/src/form_editor/blocks/divider/edit.tsx | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/assets/js/src/form_editor/blocks/divider/edit.tsx b/assets/js/src/form_editor/blocks/divider/edit.tsx
index 29373584a6..db97d4da3a 100644
--- a/assets/js/src/form_editor/blocks/divider/edit.tsx
+++ b/assets/js/src/form_editor/blocks/divider/edit.tsx
@@ -46,15 +46,19 @@ const DividerEdit = ({ attributes, setAttributes }: Props) => {
         max={40}
         allowReset
         onChange={(dividerHeight) => {
+          let newHeight = attributeHeight;
+          if (dividerHeight !== undefined) {
+            newHeight = Math.max(dividerHeight, attributeHeight);
+          }
           setAttributes({
             dividerHeight,
-            height: Math.max(dividerHeight, attributes.height),
+            height: newHeight,
           });
         }}
       />
       <RangeControl
         label={MailPoet.I18n.t('blockDividerDividerWidth')}
-        value={attributes.dividerWidth}
+        value={attributeDividerWidth}
         min={1}
         max={100}
         allowReset