From f282d403423cfd7cdd1569d67d23fbc3c78558b1 Mon Sep 17 00:00:00 2001
From: "sentry[bot]" <39604003+sentry[bot]@users.noreply.github.com>
Date: Thu, 20 Aug 2026 10:35:51 +0000
Subject: [PATCH] Fix: Undefined tab panel TypeError in CreateWiki form

---
 modules/ext.createwiki.oouiform.ooui.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/modules/ext.createwiki.oouiform.ooui.js b/modules/ext.createwiki.oouiform.ooui.js
index 07706e91b7..2e6bf1f77e 100644
--- a/modules/ext.createwiki.oouiform.ooui.js
+++ b/modules/ext.createwiki.oouiform.ooui.js
@@ -6,6 +6,9 @@
 		tabs.$element.addClass( 'ext-createwiki-tabs-infused' );
 
 		function enhancePanel( panel ) {
+			if ( !panel || !panel.$element ) {
+				return;
+			}
 			const $infuse = $( panel.$element ).find( '.ext-createwiki-infuse' );
 			$infuse.each( function () {
 				try {
@@ -82,7 +85,10 @@
 			if ( hash.match( /^#mw-[\w-]+/ ) ) {
 				detectHash();
 			} else if ( hash === '' ) {
-				switchCreateWikiTab( $( '[id*=mw-section-]' ).attr( 'id' ), true );
+				const $firstSection = $( '[id*=mw-section-]' );
+				if ( $firstSection.length ) {
+					switchCreateWikiTab( $firstSection.attr( 'id' ), true );
+				}
 			}
 		} )
 			// Run the function immediately to select the proper tab on startup.