From 343b7e333f4bce7fdb37fe05ec159370ac6447cd Mon Sep 17 00:00:00 2001
From: Herrington Darkholme
 <2883231+HerringtonDarkholme@users.noreply.github.com>
Date: Sun, 26 Dec 2021 02:44:47 -0500
Subject: [PATCH] fix(components): always emit scroll with scrollTop number
 (#4974)

---
 packages/components/affix/src/affix.vue | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/components/affix/src/affix.vue b/packages/components/affix/src/affix.vue
index 39ecc11a21..44cd9fcbce 100644
--- a/packages/components/affix/src/affix.vue
+++ b/packages/components/affix/src/affix.vue
@@ -75,7 +75,7 @@ export default defineComponent({
       state.scrollTop =
         scrollContainer.value instanceof Window
           ? document.documentElement.scrollTop
-          : scrollContainer.value.scrollTop
+          : scrollContainer.value.scrollTop || 0
       state.clientHeight = document.documentElement.clientHeight
 
       if (props.position === 'top') {