diff --git a/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js b/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js
index 2be66a16fece6d1b19967f75cf2e928a767794f7..9f8a483ff95350e46efd5f444c44442f33de748f 100644
--- a/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js
+++ b/packages/webpack-uni-mp-loader/lib/plugin/generate-component.js
@@ -128,7 +128,8 @@ module.exports = function generateComponent (compilation) {
       }
       if (name.endsWith('.wxss')) {
         // 移除部分含有错误引用的 wxss 文件
-        const origSource = assets[name].source().trim()
+        let origSource = assets[name].source()
+        origSource = origSource.trim ? origSource.trim() : ''
         const result = origSource.match(/^@import ["'](.+?)["']$/)
         if (result) {
           const wxssPath = path.join(path.dirname(name), result[1])
diff --git a/src/core/runtime/event-bus.js b/src/core/runtime/event-bus.js
index c94c4cb05a9ed27d34359d535414e3191af3b4d8..0cd25064ef9c6d52620b0bb1af4e2f6873ef100d 100644
--- a/src/core/runtime/event-bus.js
+++ b/src/core/runtime/event-bus.js
@@ -1,10 +1,6 @@
 import Vue from 'vue'
 
 const getEmitter = (function () {
-  if (typeof getUniEmitter === 'function') {
-    /* eslint-disable no-undef */
-    return getUniEmitter
-  }
   let Emitter
   return function getUniEmitter () {
     if (!Emitter) {
diff --git a/src/core/runtime/wrapper/util.js b/src/core/runtime/wrapper/util.js
index d1c8e6ba9727135109ddf5167fcdbe44809f8b4d..35c0fd93bfa3abbcc2843b16ec4ef7175a672139 100644
--- a/src/core/runtime/wrapper/util.js
+++ b/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]
   }
-}
+}