diff --git a/packages/button/behaviors.js b/packages/button/behaviors.js
index a2039c88..5473fcf4 100644
--- a/packages/button/behaviors.js
+++ b/packages/button/behaviors.js
@@ -34,24 +34,24 @@ module.exports = Behavior({
   },
 
   methods: {
-    bindgetuserinfo({ detail = {} } = {}) {
-      this.triggerEvent('getuserinfo', detail);
+    bindgetuserinfo(event = {}) {
+      this.triggerEvent('getuserinfo', event.detail || {});
     },
 
-    bindcontact({ detail = {} } = {}) {
-      this.triggerEvent('contact', detail);
+    bindcontact(event = {}) {
+      this.triggerEvent('contact', event.detail || {});
     },
 
-    bindgetphonenumber({ detail = {} } = {}) {
-      this.triggerEvent('getphonenumber', detail);
+    bindgetphonenumber(event = {}) {
+      this.triggerEvent('getphonenumber', event.detail || {});
     },
 
-    bindopensetting({ detail = {} } = {}) {
-      this.triggerEvent('opensetting', detail);
+    bindopensetting(event = {}) {
+      this.triggerEvent('opensetting', event.detail || {});
     },
 
-    binderror({ detail = {} } = {}) {
-      this.triggerEvent('error', detail);
+    binderror(event = {}) {
+      this.triggerEvent('error', event.detail || {});
     }
   }
 });
diff --git a/packages/button/index.js b/packages/button/index.js
index 183bc53f..6d7ea0c5 100644
--- a/packages/button/index.js
+++ b/packages/button/index.js
@@ -1,15 +1,12 @@
 const nativeBehaviors = require('./behaviors');
 const classnames = require('../common/classnames');
 
-const observer = function () {
+const observer = function() {
   this.setClasses();
 };
 
 Component({
-  externalClasses: [
-    'custom-class',
-    'loading-class'
-  ],
+  externalClasses: ['custom-class', 'loading-class'],
 
   behaviors: [nativeBehaviors],
 
@@ -60,17 +57,13 @@ Component({
     setClasses() {
       const { type, size, plain, disabled, loading, block } = this.data;
       this.setData({
-        classes: classnames(
-          `van-button--${type}`,
-          `van-button--${size}`,
-          {
-            'van-button--block': block,
-            'van-button--plain': plain,
-            'van-button--loading': loading,
-            'van-button--disabled': disabled,
-            'van-button--untapable': disabled || loading
-          }
-        )
+        classes: classnames(`van-button--${type}`, `van-button--${size}`, {
+          'van-button--block': block,
+          'van-button--plain': plain,
+          'van-button--loading': loading,
+          'van-button--disabled': disabled,
+          'van-button--untapable': disabled || loading
+        })
       });
     }
   }
diff --git a/packages/checkbox-group/index.js b/packages/checkbox-group/index.js
index 8b9a8a80..a40a89f4 100644
--- a/packages/checkbox-group/index.js
+++ b/packages/checkbox-group/index.js
@@ -11,15 +11,15 @@ Component({
   },
 
   data: {
-   elementUpdateTimeout: 0
+    elementUpdateTimeout: 0
   },
 
   methods: {
     updateChildren(childPath) { // 把checkbox标记为在group中，设置不同样式
-      let elements = this.getRelationNodes(childPath);
+      const elements = this.getRelationNodes(childPath);
 
       elements.forEach((checkbox, index) => {
-        checkbox.updateData({ isInGroup: true});
+        checkbox.updateData({ isInGroup: true });
       });
     }
   }
diff --git a/packages/checkbox/index.js b/packages/checkbox/index.js
index a74cd7ac..af802490 100644
--- a/packages/checkbox/index.js
+++ b/packages/checkbox/index.js
@@ -20,7 +20,7 @@ Component({
     return {
       isInGroup: false,
       isInCell: false
-    }
+    };
   },
 
   methods: {
@@ -31,8 +31,8 @@ Component({
 
       const checked = !this.data.checked;
 
-      this.triggerEvent('change', checked)
-      this.setData({ checked })
+      this.triggerEvent('change', checked);
+      this.setData({ checked });
     },
 
     updateData(data) {
diff --git a/packages/common/helper.js b/packages/common/helper.js
deleted file mode 100644
index a1aa1b1b..00000000
--- a/packages/common/helper.js
+++ /dev/null
@@ -1,76 +0,0 @@
-// 从事件对象中解析得到 componentId
-// 需要在元素上声明 data-component-id
-function extractComponentId(event = {}) {
-  const { dataset: { componentId } } = event.currentTarget || {};
-  return componentId;
-}
-
-/*
-  注：默认合并所有生命周期函数
-  配置合并指定的生命周期 or 忽略指定字段
-  const extend = extendCreator({
-    life: ['onLoad', 'onPullDownRefresh'],
-    exclude: ['binder']
-  });
-
-  Page(extend({}, {
-    onLoad() {},
-    ...
-  }));
-*/
-
-const LIFE_CYCLE = ['onLoad', 'onReady', 'onShow', 'onHide', 'onUnload', 'onPullDownRefresh', 'onReachBottom', 'onShareAppMessage', 'onPageScroll'];
-
-const extendCreator = (config = {}) => {
-  const {
-    life = LIFE_CYCLE,
-    exclude = []
-  } = config;
-
-  const excludeList = exclude.concat(LIFE_CYCLE.map(getFuncArrayName));
-
-  if (!Array.isArray(life) || !Array.isArray(exclude)) throw new Error('Invalid Extend Config');
-  let lifeCycleList = life.filter(item => LIFE_CYCLE.indexOf(item) >= 0);
-  return function extend(target, ...objList) {
-    objList.forEach((source) => {
-      if (source) {
-        let keys = Object.keys(source);
-        keys.forEach((key) => {
-          let value = source[key];
-          if (excludeList.indexOf(key) >= 0) return;
-          if (lifeCycleList.indexOf(key) >= 0 && typeof value === 'function') {
-            let funcArrayName = getFuncArrayName(key);
-            if (!target[funcArrayName]) {
-              target[funcArrayName] = [];
-              if (target[key]) {
-                target[funcArrayName].push(target[key]);
-              }
-              target[key] = function (...rest) {
-                target[funcArrayName].forEach(func => func.apply(this, rest));
-              };
-            }
-
-            if (source[funcArrayName]) {
-              // 经过生命周期合并的组件直接整合函数列表
-              target[funcArrayName].push(...source[funcArrayName]);
-            } else {
-              // 添加生命周期函数进入函数列表
-              target[funcArrayName].push(value);
-            }
-          } else {
-            target[key] = value;
-          }
-        });
-      }
-    });
-    return target;
-  };
-};
-
-const getFuncArrayName = name => `__$${name}`;
-
-module.exports = {
-  extractComponentId,
-  extend: Object.assign,
-  extendCreator
-};
diff --git a/packages/steps/index.js b/packages/steps/index.js
index 2de81e88..9d5c16c7 100644
--- a/packages/steps/index.js
+++ b/packages/steps/index.js
@@ -1,6 +1,6 @@
 Component({
   externalClasses: [
-    'custom-class',
+    'custom-class'
   ],
 
   properties: {
diff --git a/packages/tree-select/index.js b/packages/tree-select/index.js
index c63bbc9b..47ac5ae5 100644
--- a/packages/tree-select/index.js
+++ b/packages/tree-select/index.js
@@ -38,15 +38,19 @@ Component({
 
   methods: {
     // 当一个子项被选择时
-    onItemSelect({ currentTarget = {} }) {
-      const { dataset: data = {} } = currentTarget;
-      this.triggerEvent('itemclick', { ...(data.item || {}) });
+    onItemSelect(event) {
+      const {
+        dataset = {}
+      } = event.currentTarget || {};
+      this.triggerEvent('itemclick', { ...(dataset.item || {}) });
     },
 
     // 当一个导航被点击时
-    handleNavClick({ currentTarget = {} }) {
-      const { dataset: data = {} } = currentTarget;
-      this.triggerEvent('navclick', { index: data.index });
+    handleNavClick(event) {
+      const {
+        dataset = {}
+      } = event.currentTarget || {};
+      this.triggerEvent('navclick', { index: dataset.index });
     },
 
     // 更新子项列表
@@ -62,7 +66,7 @@ Component({
     updateMainHeight() {
       const maxHeight = Math.max(this.data.items.length * ITEM_HEIGHT, this.data.subItems.length * ITEM_HEIGHT);
 
-      this.setData({ mainHeight: Math.min(maxHeight, this.data.maxHeight) })
+      this.setData({ mainHeight: Math.min(maxHeight, this.data.maxHeight) });
     },
 
     // 更新子项列表高度，根据可展示的最大高度和当前子项列表的高度决定