From 02e6b30a1f17201f35bf5035bf7ef7d3d708ecd9 Mon Sep 17 00:00:00 2001
From: nebula <nebula@tilde.town>
Date: Wed, 2 Apr 2025 03:02:38 +0000
Subject: [PATCH] insert descriptive commit here

---
 js/imgGallery.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/js/imgGallery.js b/js/imgGallery.js
index ecebf05..711afaf 100644
--- a/js/imgGallery.js
+++ b/js/imgGallery.js
@@ -5,11 +5,14 @@ galleryImage = document.getElementById("galleryImage");
 previewLinks = document.getElementsByClassName("previewLink");
 headerImage = document.getElementById("headerImage");
 
-touchDragStartX = null;
 touchDragThreshold = 50;
-touchDirection = null;
 directionDetermined = false;
 
+// null is used when no information is supposed to be available.
+// functions set these to useful values during touch events.
+touchDragStartX = null;
+touchDirection = null;
+
 function enlargeImage (filename) {
   viewState = photos.indexOf(filename);
   galleryImage.fullRes = filename;
@@ -72,6 +75,7 @@ function mouseUpHandler (event) {
 };
 
 function onTouchMove (event) {
+  event.preventDefault();
   screenX = event.changedTouches[0].screenX;
   if (!directionDetermined && touchDragStartX == null) {
     touchDragStartX = screenX;
@@ -85,6 +89,7 @@ function onTouchMove (event) {
 };
 
 function onTouchEnd (event) {
+  event.preventDefault();
   // poorly phrased, but this must reset state to default
   directionDetermined = false;
   touchDragStartX = null;