From 5b96c7acb0ac3f5f964f41587c89597a7108a832 Mon Sep 17 00:00:00 2001
From: landluck <landl_ww@163.com>
Date: Fri, 2 Dec 2022 10:19:26 +0800
Subject: [PATCH] fix(tab): fix maximum call stack on scroll (#5125)

---
 packages/mixins/page-scroll.ts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/packages/mixins/page-scroll.ts b/packages/mixins/page-scroll.ts
index 91d587b6..03ebea7f 100644
--- a/packages/mixins/page-scroll.ts
+++ b/packages/mixins/page-scroll.ts
@@ -20,7 +20,6 @@ function onPageScroll(event?: IPageScrollOption) {
   });
 }
 
-
 export function pageScrollMixin(scroller: Scroller) {
   return Behavior({
     attached(this: WechatMiniprogram.Component.TrivialInstance) {
@@ -34,7 +33,7 @@ export function pageScrollMixin(scroller: Scroller) {
 
       const { vanPageScroller = [] } = page;
 
-      if (!vanPageScroller.length && isFunction(page.onPageScroll)) {
+      if (isFunction(page.onPageScroll) && page.onPageScroll !== onPageScroll) {
         vanPageScroller.push(page.onPageScroll.bind(page));
       }
 
@@ -55,7 +54,7 @@ export function pageScrollMixin(scroller: Scroller) {
 
       const { vanPageScroller } = page;
 
-      const index = vanPageScroller.findIndex(v => v === this._scroller);
+      const index = vanPageScroller.findIndex((v) => v === this._scroller);
 
       if (index > -1) {
         page.vanPageScroller.splice(index, 1);