diff --git a/src/core/view/components/scroll-view/index.vue b/src/core/view/components/scroll-view/index.vue
index e979ea4516786a6a9dadd0cb23222989ec44722f..7786531fd7575289c6c3014545096214eb73b96d 100644
--- a/src/core/view/components/scroll-view/index.vue
+++ b/src/core/view/components/scroll-view/index.vue
@@ -225,7 +225,7 @@ export default {
 
     this.__handleTouchMove = function (event) {
       if (touchStart === null) return
-      
+
       var x = event.touches[0].pageX
       var y = event.touches[0].pageY
       var main = self.$refs.main
diff --git a/src/core/view/plugins/wxs/component-descriptor.js b/src/core/view/plugins/wxs/component-descriptor.js
index b75e42b7109e36f24a5ad92fa0052aaa6a2b79bc..0a2edbb19bffe02167b8a4fbe0f6062260475f62 100644
--- a/src/core/view/plugins/wxs/component-descriptor.js
+++ b/src/core/view/plugins/wxs/component-descriptor.js
@@ -160,6 +160,18 @@ class ComponentDescriptor {
     // TODO options
     return (this.$vm.$emit(eventName, detail), this)
   }
+
+  setTimeout (handler: TimerHandler, timeout ? : number) {
+    return window.setTimeout(handler, timeout)
+  }
+
+  clearTimeout (handle ? : number) {
+    return window.clearTimeout(handle)
+  }
+
+  getBoundingClientRect () {
+    return this.$el.getBoundingClientRect()
+  }
 }
 
 export function createComponentDescriptor (vm, isOwnerInstance = true) {
@@ -174,4 +186,4 @@ export function createComponentDescriptor (vm, isOwnerInstance = true) {
     }
     return vm.__wxsComponentDescriptor
   }
-}
+}