From 4ce05ed980db6e7038e1c1fb52ae8eab28b5a943 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Wed, 3 Mar 2021 23:39:55 +0100
Subject: [PATCH] Only preventDefault when event is cancelable

---
 src/ol/MapBrowserEventHandler.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/ol/MapBrowserEventHandler.js b/src/ol/MapBrowserEventHandler.js
index 8a312921cd..a778874ec9 100644
--- a/src/ol/MapBrowserEventHandler.js
+++ b/src/ol/MapBrowserEventHandler.js
@@ -336,9 +336,10 @@ class MapBrowserEventHandler extends EventTarget {
   handleTouchMove_(event) {
     // Due to https://github.com/mpizenberg/elm-pep/issues/2, `this.originalPointerMoveEvent_`
     // may not be initialized yet when we get here on a platform without native pointer events.
+    const originalEvent = this.originalPointerMoveEvent_;
     if (
-      !this.originalPointerMoveEvent_ ||
-      this.originalPointerMoveEvent_.defaultPrevented
+      (!originalEvent || originalEvent.defaultPrevented) &&
+      (typeof event.cancelable !== 'boolean' || event.cancelable === true)
     ) {
       event.preventDefault();
     }