From 91dbc39bad3678dde1a5aad465c05eb14d394ec6 Mon Sep 17 00:00:00 2001
From: tangjinzhou <415800467@qq.com>
Date: Mon, 8 Nov 2021 22:41:27 +0800
Subject: [PATCH] fix: collapse animation not work, close #4856

---
 components/_util/requestAnimationTimeout.js | 2 +-
 components/collapse/CollapsePanel.tsx       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/components/_util/requestAnimationTimeout.js b/components/_util/requestAnimationTimeout.js
index beae9ea29..f82f19fed 100644
--- a/components/_util/requestAnimationTimeout.js
+++ b/components/_util/requestAnimationTimeout.js
@@ -5,7 +5,7 @@ const raf = getRequestAnimationFrame();
 
 export const cancelAnimationTimeout = frame => caf(frame.id);
 
-export const requestAnimationTimeout = (callback, delay) => {
+export const requestAnimationTimeout = (callback, delay = 0) => {
   const start = Date.now();
   function timeout() {
     if (Date.now() - start >= delay) {
diff --git a/components/collapse/CollapsePanel.tsx b/components/collapse/CollapsePanel.tsx
index c845f3035..4074790dc 100644
--- a/components/collapse/CollapsePanel.tsx
+++ b/components/collapse/CollapsePanel.tsx
@@ -79,7 +79,7 @@ export default defineComponent({
         ></PanelContent>
       );
       const transitionProps = {
-        appear: true,
+        appear: false,
         css: false,
         ...openAnimation,
       };