From 6bf91031ad5075ba2f37b013bcaba6f6c21314e6 Mon Sep 17 00:00:00 2001
From: Jon Q <hello@jonquach.com>
Date: Wed, 25 Mar 2020 18:06:39 -0400
Subject: [PATCH] Prevent rendering of position className if undefined

---
 packages/block-library/src/cover/shared.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/block-library/src/cover/shared.js b/packages/block-library/src/cover/shared.js
index 27d7d8e39073f..681455621d968 100644
--- a/packages/block-library/src/cover/shared.js
+++ b/packages/block-library/src/cover/shared.js
@@ -69,6 +69,8 @@ export function attributesFromMedia( setAttributes ) {
 }
 
 export function getPositionClassName( contentPosition ) {
+	if ( contentPosition === undefined ) return '';
+
 	const index = getAlignmentIndex( contentPosition );
 
 	return POSITION_CLASSNAMES[ index ];