From fdb76a5db83c867eca7fec19b3d931bd56d3df63 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9?= <583546+oandregal@users.noreply.github.com>
Date: Wed, 14 Dec 2022 14:12:27 +0100
Subject: [PATCH] compat/6.1: get_style_nodes add missing backport

https://github.com/WordPress/gutenberg/pull/43622
---
 lib/compat/wordpress-6.2/class-wp-theme-json-gutenberg.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/compat/wordpress-6.2/class-wp-theme-json-gutenberg.php b/lib/compat/wordpress-6.2/class-wp-theme-json-gutenberg.php
index e9751238c85118..272c2fe8b76fba 100644
--- a/lib/compat/wordpress-6.2/class-wp-theme-json-gutenberg.php
+++ b/lib/compat/wordpress-6.2/class-wp-theme-json-gutenberg.php
@@ -1903,9 +1903,11 @@ protected static function get_style_nodes( $theme_json, $selectors = array() ) {
 
 		if ( isset( $theme_json['styles']['elements'] ) ) {
 			foreach ( self::ELEMENTS as $element => $selector ) {
-				if ( ! isset( $theme_json['styles']['elements'][ $element ] ) ) {
+				if ( ! isset( $theme_json['styles']['elements'][ $element ] ) || ! array_key_exists( $element, static::ELEMENTS ) ) {
 					continue;
 				}
+
+				// Handle element defaults.
 				$nodes[] = array(
 					'path'     => array( 'styles', 'elements', $element ),
 					'selector' => static::ELEMENTS[ $element ],