From 67c90c16f12bd74f055121a6853d9554dcbeccee Mon Sep 17 00:00:00 2001
From: Yamagishi Kazutoshi <ykzts@desire.sh>
Date: Sat, 21 Sep 2019 00:13:45 +0900
Subject: [PATCH] Respect original ID with ToC (#11895)

---
 app/lib/toc_generator.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/lib/toc_generator.rb b/app/lib/toc_generator.rb
index c6e1795579..351675a5cd 100644
--- a/app/lib/toc_generator.rb
+++ b/app/lib/toc_generator.rb
@@ -45,7 +45,7 @@ class TOCGenerator
     parsed_html.traverse do |node|
       next unless TARGET_ELEMENTS.include?(node.name)
 
-      anchor = node.text.parameterize
+      anchor = node['id'] || node.text.parameterize
       @slugs[anchor] += 1
       anchor = "#{anchor}-#{@slugs[anchor]}" if @slugs[anchor] > 1