From 69cdf45958ab23c05658f0fd618ebdab83085863 Mon Sep 17 00:00:00 2001
From: nemo-shen <kienshin626@gmail.com>
Date: Mon, 6 Sep 2021 19:49:54 +0800
Subject: [PATCH] fix(page-scroll): check getCurrentPage is def (#4458)

---
 packages/mixins/page-scroll.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/packages/mixins/page-scroll.ts b/packages/mixins/page-scroll.ts
index 0dfb0018..f427e305 100644
--- a/packages/mixins/page-scroll.ts
+++ b/packages/mixins/page-scroll.ts
@@ -1,4 +1,4 @@
-import { getCurrentPage } from '../common/utils';
+import { getCurrentPage, isDef } from '../common/utils';
 
 type IPageScrollOption = WechatMiniprogram.Page.IPageScrollOption;
 type Scroller = (
@@ -38,7 +38,9 @@ export const pageScrollMixin = (scroller: Scroller) =>
 
     detached() {
       const page = getCurrentPage<{ vanPageScroller: Scroller[] }>();
-      page.vanPageScroller =
-        page.vanPageScroller?.filter((item) => item !== scroller) || [];
+      if (!isDef(page)) {
+        page.vanPageScroller =
+          page.vanPageScroller?.filter((item) => item !== scroller) || [];
+      }
     },
   });