From 560f4d667acf39de392126cf7b77b2828cdc3ee0 Mon Sep 17 00:00:00 2001
From: Juergen Kunz <juergen@foss.global>
Date: Thu, 11 Dec 2025 15:19:49 +0000
Subject: [PATCH] make scroll listener passive

---
 ts_web/elements/viewer.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ts_web/elements/viewer.ts b/ts_web/elements/viewer.ts
index 56ad083..c7a2fcc 100644
--- a/ts_web/elements/viewer.ts
+++ b/ts_web/elements/viewer.ts
@@ -1177,7 +1177,7 @@ export class DeDocumentViewer extends DeesElement {
         // Trigger re-render to update active thumbnail
         this.requestUpdate();
       };
-      viewport.addEventListener("scroll", scrollHandler);
+      viewport.addEventListener("scroll", scrollHandler, { passive: true });
       this.registerGarbageFunction(() => viewport.removeEventListener("scroll", scrollHandler));
     }