From 816b62b6ce73d4bc7aa612fb54e66cc715c692a3 Mon Sep 17 00:00:00 2001
From: Alexander Zinchuk <alx.zinchuk@gmail.com>
Date: Wed, 5 Jul 2023 13:15:39 +0200
Subject: [PATCH] Transition: Fix marking next slide as inactive

---
 src/components/ui/Transition.tsx | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/src/components/ui/Transition.tsx b/src/components/ui/Transition.tsx
index de67ac676..09c73713b 100644
--- a/src/components/ui/Transition.tsx
+++ b/src/components/ui/Transition.tsx
@@ -124,6 +124,7 @@ function Transition({
     const keys = Object.keys(rendersRef.current).map(Number);
     const prevActiveIndex = renderCount ? prevActiveKey : keys.indexOf(prevActiveKey);
     const activeIndex = renderCount ? activeKey : keys.indexOf(activeKey);
+    const nextIndex = nextKey ? (renderCount ? nextKey : keys.indexOf(nextKey)) : -1;
 
     const childNodes = Array.from(container.childNodes);
     if (!childNodes.length) {
@@ -140,20 +141,19 @@ function Transition({
     });
 
     if (!activeKeyChanged) {
-      if (childElements.length === 1 || (nextKey !== undefined && childElements.length === 2)) {
-        const firstChild = childNodes[activeIndex] as HTMLElement;
-
-        addExtraClass(firstChild, CLASSES.active);
+      const activeChild = childNodes[activeIndex];
+      if (activeChild instanceof HTMLElement) {
+        addExtraClass(activeChild, CLASSES.active);
 
         if (isSlideOptimized) {
-          firstChild.style.transition = 'none';
-          firstChild.style.transform = 'translate3d(0, 0, 0)';
+          activeChild.style.transition = 'none';
+          activeChild.style.transform = 'translate3d(0, 0, 0)';
         }
+      }
 
-        if (childElements.length === 2) {
-          const nextChild = childElements[0] === firstChild ? childElements[1] : childElements[0];
-          addExtraClass(nextChild, CLASSES.inactive);
-        }
+      const nextChild = nextIndex !== -1 && nextIndex !== activeIndex && childNodes[nextIndex] as HTMLElement;
+      if (nextChild instanceof HTMLElement) {
+        addExtraClass(nextChild, CLASSES.inactive);
       }
 
       return;