From 9c2f46cb191e8765bc93b74d742546c01c628d38 Mon Sep 17 00:00:00 2001
From: Mark Salsbery <>
Date: Fri, 24 Sep 2021 16:20:04 -0700
Subject: [PATCH 1/2] Explicitly set passive:false for wheel event handlers to
 supress console warnings

---
 src/mousetracker.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mousetracker.js b/src/mousetracker.js
index 75ec7be0..487202a7 100644
--- a/src/mousetracker.js
+++ b/src/mousetracker.js
@@ -1463,7 +1463,7 @@
                     tracker.element,
                     event,
                     delegate[ event ],
-                    false
+                    event === $.MouseTracker.wheelEventName ? { passive: false, capture: false } : false
                 );
             }
 

From 2353f96d2cc2f4adfdca099beb0f430e8bca0baf Mon Sep 17 00:00:00 2001
From: Mark Salsbery <>
Date: Fri, 24 Sep 2021 16:23:19 -0700
Subject: [PATCH 2/2] changelog update

---
 changelog.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/changelog.txt b/changelog.txt
index 58cf8804..81f52e02 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -54,7 +54,8 @@ OPENSEADRAGON CHANGELOG
 * Added a static method in OpenSeadragon to get an existing viewer (#2000 @HerCerM)
 * Now ensuring that the new item is already in the navigator when the "add-item" event fires (#2005 @RammasEchor)
 * Added keys to change image in sequence mode (j: previous, k: next) (#2007 @RammasEchor)
-* Fixed a bug where the navigator wouldn't pick up opacity/composite changes made while it is loading (#2018 @crydell) 
+* Fixed a bug where the navigator wouldn't pick up opacity/composite changes made while it is loading (#2018 @crydell)
+* Explicitly set passive:false for wheel event handlers to supress console warnings. Fixes #1669 (#2043 @msalsbery)
 
 2.4.2: