From f40fe8d8baaa91c53ffd1d59446d47f46745a248 Mon Sep 17 00:00:00 2001
From: Sebastian Markbage <sebastian@calyptus.eu>
Date: Tue, 18 Feb 2025 19:17:33 -0500
Subject: [PATCH] Don't change direction if the new scroll position is the same
 as current

This avoids a case where we'd switch to previous when returning to 0 where
0 was also the starting point.
---
 .../src/client/ReactFiberConfigDOM.js          | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js b/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
index dbe3997127ff4..52560d0b006b0 100644
--- a/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
+++ b/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
@@ -1504,11 +1504,10 @@ export function subscribeToGestureDirection(
     const scrollCallback = () => {
       const newTime = provider.currentTime;
       if (newTime !== null) {
-        directionCallback(
-          typeof newTime === 'number'
-            ? newTime > currentOffset
-            : newTime.value > currentOffset,
-        );
+        const newValue = typeof newTime === 'number' ? newTime : newTime.value;
+        if (newValue !== currentOffset) {
+          directionCallback(newValue > currentOffset);
+        }
       }
     };
     element.addEventListener('scroll', scrollCallback, false);
@@ -1521,11 +1520,10 @@ export function subscribeToGestureDirection(
     const rafCallback = () => {
       const newTime = provider.currentTime;
       if (newTime !== null) {
-        directionCallback(
-          typeof newTime === 'number'
-            ? newTime > currentOffset
-            : newTime.value > currentOffset,
-        );
+        const newValue = typeof newTime === 'number' ? newTime : newTime.value;
+        if (newValue !== currentOffset) {
+          directionCallback(newValue > currentOffset);
+        }
       }
       callbackID = requestAnimationFrame(rafCallback);
     };