From c7690c34c2d7bff11501188266b7be7a486c1bd0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hannes=20Walln=C3=B6fer?= <hannesw@openjdk.org>
Date: Mon, 19 Aug 2024 17:47:25 +0000
Subject: [PATCH] 8338190: TOC vertical offsets not updated when document size
 changes

Reviewed-by: jjg
---
 .../doclets/formats/html/resources/script.js.template       | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/script.js.template b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/script.js.template
index 71ef8476708..633f453bc43 100644
--- a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/script.js.template
+++ b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/script.js.template
@@ -461,7 +461,7 @@ document.addEventListener("DOMContentLoaded", function(e) {
         })
     }
     // Resize handler
-    function handleResize(e) {
+    new ResizeObserver((entries) => {
         if (expanded) {
             if (windowWidth !== window.innerWidth) {
                 collapse();
@@ -475,7 +475,5 @@ document.addEventListener("DOMContentLoaded", function(e) {
             handleScroll();
         }
         setTopMargin();
-    }
-    window.addEventListener("orientationchange", handleResize);
-    window.addEventListener("resize", handleResize);
+    }).observe(document.body);
 });