From f9a5c35a6833cb11977de2aad9257fb00481d715 Mon Sep 17 00:00:00 2001
From: flakey5 <73616808+flakey5@users.noreply.github.com>
Date: Mon, 24 Nov 2025 13:51:25 -0800
Subject: [PATCH] feat(legacy-html): mirror sidebar scroll changes

Mirror to https://github.com/nodejs/node/pull/60410

Signed-off-by: flakey5 <73616808+flakey5@users.noreply.github.com>
---
 src/generators/legacy-html/assets/api.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/generators/legacy-html/assets/api.js b/src/generators/legacy-html/assets/api.js
index 0c33adb4..8963eb75 100644
--- a/src/generators/legacy-html/assets/api.js
+++ b/src/generators/legacy-html/assets/api.js
@@ -13,6 +13,7 @@ const initFeatures = () => {
   setupAltDocsLink();
   setupFlavorToggles();
   setupCopyButton();
+  setupSidebarScroll();
 };
 
 /**
@@ -199,6 +200,23 @@ const setupCopyButton = () => {
   });
 };
 
+function setupSidebarScroll() {
+  const sidebarLinks = document.querySelectorAll('#column2 a');
+
+  let link;
+  for (link of sidebarLinks) {
+    if (link.pathname === window.location.pathname) {
+      break;
+    }
+  }
+
+  if (!link) {
+    return;
+  }
+
+  link.scrollIntoView({ block: 'center' });
+}
+
 // Initialize either on DOMContentLoaded or immediately if already loaded
 document.addEventListener('DOMContentLoaded', initFeatures);
 if (document.readyState !== 'loading') initFeatures();