From a78dc5a8894d92647ee65e7e1cdc94d087efb50e Mon Sep 17 00:00:00 2001
From: Quincy Morgan <quincy.morgan@icloud.com>
Date: Fri, 29 May 2020 13:08:13 -0400
Subject: [PATCH] Simply default gesture cancelation and add additional safety
 check for IE

---
 modules/ui/init.js | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/modules/ui/init.js b/modules/ui/init.js
index a9bed76e1..ed275f281 100644
--- a/modules/ui/init.js
+++ b/modules/ui/init.js
@@ -56,6 +56,8 @@ export function uiInit(context) {
 
         container
             .on('click.ui', function() {
+                if (!d3_event.composedPath) return;
+
                 // some targets have default click events we don't want to override
                 var isOkayTarget = d3_event.composedPath().some(function(node) {
                     // clicking <label> affects its <input> by default
@@ -69,9 +71,9 @@ export function uiInit(context) {
                 d3_event.preventDefault();
             })
             // disable pinch-to-zoom in Safari
-            .on('gesturestart.ui', eventCancel)
-            .on('gesturechange.ui', eventCancel)
-            .on('gestureend.ui', eventCancel);
+            .on('gesturestart.ui gesturechange.ui gestureend.ui', function() {
+                d3_event.preventDefault();
+            });
 
         container
             .attr('dir', localizer.textDirection());
@@ -406,9 +408,6 @@ export function uiInit(context) {
             };
         }
 
-        function eventCancel() {
-            d3_event.preventDefault();
-        }
     }