diff --git a/src/common/utils.ts b/src/common/utils.ts
index 975d11a4d..31c8c8e09 100644
--- a/src/common/utils.ts
+++ b/src/common/utils.ts
@@ -1,11 +1,12 @@
 import Taro from '@tarojs/taro'
 import { execObject, SelectorQuery } from '@tarojs/taro/types/index'
 
+const ENV = Taro.getEnv()
 const REM_LAYOUT_DELAY: number = 500
 
 function delay (): Promise<null> {
   return new Promise(resolve => {
-    if (Taro.getEnv() === Taro.ENV_TYPE.WEB) {
+    if (ENV === Taro.ENV_TYPE.WEB) {
       setTimeout(() => {
         resolve()
       }, REM_LAYOUT_DELAY)
@@ -16,9 +17,10 @@ function delay (): Promise<null> {
 }
 
 function delayQuerySelector (
-  $scope,
+  self,
   selectorStr: string
 ): Promise<Array<execObject>> {
+  const $scope = ENV === Taro.ENV_TYPE.WEB ? self : self.$scope
   const selector: SelectorQuery = Taro.createSelectorQuery().in($scope)
 
   return new Promise(resolve => {
@@ -38,7 +40,7 @@ function uuid (
   radix = 16
 ): string {
 
-  var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
+  var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
   var uuid: string[] = []
   var i = 0
   radix = radix || chars.length
diff --git a/src/components/calendar/body/index.tsx b/src/components/calendar/body/index.tsx
index 4f26d3099..65382d3c1 100644
--- a/src/components/calendar/body/index.tsx
+++ b/src/components/calendar/body/index.tsx
@@ -139,7 +139,7 @@ export default class AtCalendarBody extends Taro.Component<
   }
 
   componentDidMount () {
-    delayQuerySelector(this.$scope, '.at-calendar-slider__main').then(res => {
+    delayQuerySelector(this, '.at-calendar-slider__main').then(res => {
       this.maxWidth = res[0].width
     })
   }
diff --git a/src/components/swipe-action/index.js b/src/components/swipe-action/index.js
index e9ad25f3b..601ae438e 100644
--- a/src/components/swipe-action/index.js
+++ b/src/components/swipe-action/index.js
@@ -35,7 +35,7 @@ export default class AtSwipeAction extends AtComponent {
 
   componentDidMount () {
     delayQuerySelector(
-      Taro.getEnv() === Taro.ENV_TYPE.WEB ? this : this.$scope,
+      this,
       `#swipeAction-${this.state.componentId}`
     ).then(res => {
       this.domInfo = res[0]
diff --git a/src/components/swipe-action/options/index.js b/src/components/swipe-action/options/index.js
index 278f9e32e..ef730a12a 100644
--- a/src/components/swipe-action/options/index.js
+++ b/src/components/swipe-action/options/index.js
@@ -7,7 +7,7 @@ import { delayQuerySelector } from '../../../common/utils'
 export default class AtSwiperActionOptions extends AtComponent {
   componentDidMount () {
     delayQuerySelector(
-      Taro.getEnv() === Taro.ENV_TYPE.WEB ? this : this.$scope,
+      this,
       `#swipeActionOptions-${this.props.componentId}`
     ).then(res => {
       this.props.onQueryedDom(res[0])