From 6df60895aba9c5ea8690b28828a425f59ac4acb6 Mon Sep 17 00:00:00 2001
From: Jon Robson <jdlrobson@gmail.com>
Date: Tue, 16 Aug 2022 07:04:27 +0100
Subject: [PATCH] TOC: Prepare for upstream change to mw:tocplace element

Bug: T311502
Change-Id: I1f607cf1ef1b61fb4d2e1880de756fb94d5a6b22
---
 resources/skins.vector.es6/main.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/resources/skins.vector.es6/main.js b/resources/skins.vector.es6/main.js
index aed78306..c7aa78f7 100644
--- a/resources/skins.vector.es6/main.js
+++ b/resources/skins.vector.es6/main.js
@@ -15,7 +15,7 @@ const
 	BODY_CONTENT_ID = 'bodyContent',
 	HEADLINE_SELECTOR = '.mw-headline',
 	TOC_SECTION_ID_PREFIX = 'toc-',
-	TOC_LEGACY_PLACEHOLDER_TAG = 'mw:tocplace',
+	TOC_LEGACY_PLACEHOLDER_SELECTOR = 'mw:tocplace,meta[property="mw:PageProp/toc"]',
 	TOC_SCROLL_HOOK = 'table_of_contents',
 	TOC_COLLAPSED_CLASS = 'vector-toc-collapsed',
 	PAGE_TITLE_SCROLL_HOOK = 'page_title',
@@ -214,7 +214,7 @@ const main = () => {
 
 	// Setup intersection observer for TOC scroll event tracking
 	// fire hooks for event logging if AB tests are enabled
-	const tocLegacyPlaceholder = document.getElementsByTagName( TOC_LEGACY_PLACEHOLDER_TAG )[ 0 ];
+	const tocLegacyPlaceholder = document.querySelectorAll( TOC_LEGACY_PLACEHOLDER_SELECTOR )[ 0 ];
 	const tocLegacyTargetIntersection = tocElementLegacy || tocLegacyPlaceholder;
 	// Initiate observer for table of contents in main content.
 	if ( tocLegacyTargetIntersection ) {