From dd480feda10cb1626c5cbd907366d2a6e7985155 Mon Sep 17 00:00:00 2001
From: Sampo Osmonen <sampo.osmonen@meiko.fi>
Date: Tue, 10 Mar 2020 12:56:15 +0200
Subject: [PATCH] Prevent touchmove event default when no preceding pointer
 event

Prevents zooming the page instead of the map on the first interaction
---
 src/ol/MapBrowserEventHandler.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ol/MapBrowserEventHandler.js b/src/ol/MapBrowserEventHandler.js
index e9b37eb8c6..1c70416eb7 100644
--- a/src/ol/MapBrowserEventHandler.js
+++ b/src/ol/MapBrowserEventHandler.js
@@ -277,7 +277,7 @@ 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.
-    if (this.originalPointerMoveEvent_ && this.originalPointerMoveEvent_.defaultPrevented) {
+    if (!this.originalPointerMoveEvent_ || this.originalPointerMoveEvent_.defaultPrevented) {
       event.preventDefault();
     }
   }