fix: 修复组件嵌套时解构插槽内事件报错的问题 question/99063

src/core/runtime/wrapper/util.js

@@ -9,8 +9,8 @@ import {
 
 export const PAGE_EVENT_HOOKS = [
   'onPullDownRefresh',
-  'onReachBottom',
-  'onAddToFavorites',
+  'onReachBottom',
+  'onAddToFavorites',
   'onShareTimeline',
   'onShareAppMessage',
   'onPageScroll',
@@ -471,6 +471,15 @@ function isMatchEventType (eventType, optType) {
     )
 }
 
+function getContextVm (vm) {
+  let $parent = vm.$parent
+  // 父组件是 scoped slots 或者其他自定义组件时继续查找
+  while ($parent && $parent.$parent && ($parent.$options.generic || $parent.$parent.$options.generic || $parent.$scope._$vuePid)) {
+    $parent = $parent.$parent
+  }
+  return $parent && $parent.$parent
+}
+
 export function handleEvent (event) {
   event = wrapper(event)
 
@@ -503,12 +512,8 @@ export function handleEvent (event) {
         const methodName = eventArray[0]
         if (methodName) {
           let handlerCtx = this.$vm
-          if (
-            handlerCtx.$options.generic &&
-            handlerCtx.$parent &&
-            handlerCtx.$parent.$parent
-          ) { // mp-weixin,mp-toutiao 抽象节点模拟 scoped slots
-            handlerCtx = handlerCtx.$parent.$parent
+          if (handlerCtx.$options.generic) { // mp-weixin,mp-toutiao 抽象节点模拟 scoped slots
+            handlerCtx = getContextVm(handlerCtx) || handlerCtx
           }
           if (methodName === '$emit') {
             handlerCtx.$emit.apply(handlerCtx,
@@ -552,4 +557,4 @@ export function handleEvent (event) {
   ) {
     return ret[0]
   }
-}
+}