diff --git a/dist/common/color.d.ts b/dist/common/color.d.ts
index 5fa14477..3f462228 100644
--- a/dist/common/color.d.ts
+++ b/dist/common/color.d.ts
@@ -1,3 +1,4 @@
 export declare const RED = "#f44";
 export declare const BLUE = "#1989fa";
 export declare const GREEN = "#07c160";
+export declare const ORANGE = "#ff976a";
diff --git a/dist/common/color.js b/dist/common/color.js
index 5f5e9660..c850d2a1 100644
--- a/dist/common/color.js
+++ b/dist/common/color.js
@@ -1,3 +1,4 @@
 export const RED = '#f44';
 export const BLUE = '#1989fa';
 export const GREEN = '#07c160';
+export const ORANGE = '#ff976a';
diff --git a/dist/common/component.d.ts b/dist/common/component.d.ts
index 2c47a09a..9ba8a3bd 100644
--- a/dist/common/component.d.ts
+++ b/dist/common/component.d.ts
@@ -1,3 +1,3 @@
-import { VantComponentOptions, CombinedComponentInstance } from 'definitions/index';
+import { VantComponentOptions, CombinedComponentInstance } from '../definitions/index';
 declare function VantComponent<Data, Props, Methods, Computed>(vantOptions?: VantComponentOptions<Data, Props, Methods, Computed, CombinedComponentInstance<Data, Props, Methods, Computed>>): void;
 export { VantComponent };
diff --git a/dist/common/utils.d.ts b/dist/common/utils.d.ts
index 32fc1bab..dc55bd7d 100644
--- a/dist/common/utils.d.ts
+++ b/dist/common/utils.d.ts
@@ -1,5 +1,7 @@
+/// <reference types="miniprogram-api-typings" />
 export declare function isDef(value: any): boolean;
 export declare function isObj(x: any): boolean;
 export declare function isNumber(value: any): boolean;
 export declare function range(num: number, min: number, max: number): number;
 export declare function nextTick(fn: Function): void;
+export declare function getSystemInfoSync(): WechatMiniprogram.GetSystemInfoSuccessCallbackResult;
diff --git a/dist/common/utils.js b/dist/common/utils.js
index f08d8d35..213c91ae 100644
--- a/dist/common/utils.js
+++ b/dist/common/utils.js
@@ -16,3 +16,10 @@ export function nextTick(fn) {
         fn();
     }, 1000 / 30);
 }
+let systemInfo = null;
+export function getSystemInfoSync() {
+    if (systemInfo == null) {
+        systemInfo = wx.getSystemInfoSync();
+    }
+    return systemInfo;
+}
diff --git a/dist/field/index.js b/dist/field/index.js
index 188c4d37..7865c000 100644
--- a/dist/field/index.js
+++ b/dist/field/index.js
@@ -1,4 +1,5 @@
 import { VantComponent } from '../common/component';
+import { getSystemInfoSync } from '../common/utils';
 VantComponent({
     field: true,
     classes: ['input-class', 'right-icon-class'],
@@ -66,63 +67,29 @@ VantComponent({
         }
     },
     data: {
-        showClear: false
-    },
-    beforeCreate() {
-        this.focused = false;
+        focused: false,
+        system: getSystemInfoSync().system.split(' ').shift().toLowerCase()
     },
     methods: {
         onInput(event) {
             const { value = '' } = event.detail || {};
-            this.set({
-                value,
-                showClear: this.getShowClear(value)
-            }, () => {
+            this.set({ value }, () => {
                 this.emitChange(value);
             });
         },
         onFocus(event) {
-            const { value = '', height = 0 } = event.detail || {};
-            this.$emit('focus', { value, height });
-            this.focused = true;
-            this.blurFromClear = false;
-            this.set({
-                showClear: this.getShowClear()
-            });
+            this.set({ focused: true });
+            this.$emit('focus', event.detail);
         },
         onBlur(event) {
-            const { value = '', cursor = 0 } = event.detail || {};
-            this.$emit('blur', { value, cursor });
-            this.focused = false;
-            const showClear = this.getShowClear();
-            if (this.data.value === value) {
-                this.set({
-                    showClear
-                });
-            }
-            else if (!this.blurFromClear) {
-                // fix: the handwritten keyboard does not trigger input change
-                this.set({
-                    value,
-                    showClear
-                }, () => {
-                    this.emitChange(value);
-                });
-            }
+            this.set({ focused: false });
+            this.$emit('blur', event.detail);
         },
         onClickIcon() {
             this.$emit('click-icon');
         },
-        getShowClear(value) {
-            value = value === undefined ? this.data.value : value;
-            return (this.data.clearable && this.focused && value && !this.data.readonly);
-        },
         onClear() {
-            this.blurFromClear = true;
-            this.set({
-                value: '',
-                showClear: this.getShowClear('')
-            }, () => {
+            this.set({ value: '' }, () => {
                 this.emitChange('');
                 this.$emit('clear', '');
             });
diff --git a/dist/field/index.wxml b/dist/field/index.wxml
index 1a3e9afd..d5e70cc1 100644
--- a/dist/field/index.wxml
+++ b/dist/field/index.wxml
@@ -14,15 +14,18 @@
 >
   <slot name="left-icon" slot="icon" />
   <slot name="label" slot="title" />
-  <view class="van-field__body {{ type === 'textarea' ? 'van-field__body--textarea' : '' }}">
+  <view class="{{ utils.bem('field__body', [type, system]) }}">
     <textarea
       wx:if="{{ type === 'textarea' }}"
-      class="input-class {{ utils.bem('field__input', [inputAlign, { disabled, error }]) }}"
+      class="input-class {{ utils.bem('field__input', [inputAlign, type, { disabled, error }]) }}"
       fixed="{{ fixed }}"
       focus="{{ focus }}"
       value="{{ value }}"
       disabled="{{ disabled || readonly }}"
       maxlength="{{ maxlength }}"
+      placeholder="{{ placeholder }}"
+      placeholder-style="{{ placeholderStyle }}"
+      placeholder-class="{{ utils.bem('field__placeholder', { error }) }}"
       auto-height="{{ autosize }}"
       cursor-spacing="{{ cursorSpacing }}"
       adjust-position="{{ adjustPosition }}"
@@ -34,9 +37,6 @@
       bind:focus="onFocus"
       bind:confirm="onConfirm"
     >
-      <view wx:if="{{ value == null || value.length === 0 }}" style="{{ placeholderStyle }}" class="{{ utils.bem('field__placeholder', { error }) }}">
-        {{ placeholder }}
-      </view>
     </textarea>
     <input
       wx:else
@@ -48,7 +48,7 @@
       maxlength="{{ maxlength }}"
       placeholder="{{ placeholder }}"
       placeholder-style="{{ placeholderStyle }}"
-      placeholder-class="{{ error ? 'van-field__placeholder--error' : 'van-field__placeholder' }}"
+      placeholder-class="{{ utils.bem('field__placeholder', { error }) }}"
       confirm-type="{{ confirmType }}"
       confirm-hold="{{ confirmHold }}"
       cursor-spacing="{{ cursorSpacing }}"
@@ -62,7 +62,7 @@
       bind:confirm="onConfirm"
     />
     <van-icon
-      wx:if="{{ showClear }}"
+      wx:if="{{ clearable && focused && value && !readonly }}"
       size="16px"
       name="clear"
       class="van-field__clear-root van-field__icon-root"
diff --git a/dist/field/index.wxss b/dist/field/index.wxss
index c4eade8a..e53fee3e 100644
--- a/dist/field/index.wxss
+++ b/dist/field/index.wxss
@@ -1 +1 @@
-@import '../common/index.wxss';.van-field__body{display:-webkit-flex;display:flex;-webkit-align-items:center;align-items:center}.van-field__body--textarea{min-height:24px}.van-field__input{position:relative;display:block;width:100%;height:24px;min-height:24px;padding:0;margin:0;line-height:inherit;color:#333;text-align:left;background-color:initial;border:0;box-sizing:border-box;resize:none}.van-field__input--error{color:#f44}.van-field__input--disabled{color:#999;background-color:initial;opacity:1}.van-field__input--center{text-align:center}.van-field__input--right{text-align:right}.van-field__placeholder{position:absolute;top:0;right:0;left:0;color:#999;pointer-events:none}.van-field__placeholder--error{color:#f44}.van-field__icon-root{display:-webkit-flex;display:flex;min-height:24px;-webkit-align-items:center;align-items:center}.van-field__clear-root,.van-field__icon-container{padding:0 10px;margin-right:-10px;line-height:inherit;vertical-align:middle}.van-field__button,.van-field__clear-root,.van-field__icon-container{-webkit-flex-shrink:0;flex-shrink:0}.van-field__clear-root{color:#c9c9c9}.van-field__icon-container{color:#999}.van-field__icon-container:empty{display:none}.van-field__button{padding-left:10px}.van-field__button:empty{display:none}.van-field__error-message{font-size:12px;color:#f44;text-align:left}.van-field__error-message--center{text-align:center}.van-field__error-message--right{text-align:right}
\ No newline at end of file
+@import '../common/index.wxss';.van-field__body{display:-webkit-flex;display:flex;-webkit-align-items:center;align-items:center}.van-field__body--textarea{min-height:24px;line-height:1.2em}.van-field__body--textarea.van-field__body--ios{margin-top:-4.5px}.van-field__input{position:relative;display:block;width:100%;height:24px;min-height:24px;padding:0;margin:0;line-height:inherit;color:#333;text-align:left;background-color:initial;border:0;box-sizing:border-box;resize:none}.van-field__input--textarea{height:18px;min-height:18px}.van-field__input--error{color:#f44}.van-field__input--disabled{color:#999;background-color:initial;opacity:1}.van-field__input--center{text-align:center}.van-field__input--right{text-align:right}.van-field__placeholder{position:absolute;top:0;right:0;left:0;color:#999;pointer-events:none}.van-field__placeholder--error{color:#f44}.van-field__icon-root{display:-webkit-flex;display:flex;min-height:24px;-webkit-align-items:center;align-items:center}.van-field__clear-root,.van-field__icon-container{padding:0 10px;margin-right:-10px;line-height:inherit;vertical-align:middle}.van-field__button,.van-field__clear-root,.van-field__icon-container{-webkit-flex-shrink:0;flex-shrink:0}.van-field__clear-root{color:#c9c9c9}.van-field__icon-container{color:#999}.van-field__icon-container:empty{display:none}.van-field__button{padding-left:10px}.van-field__button:empty{display:none}.van-field__error-message{font-size:12px;color:#f44;text-align:left}.van-field__error-message--center{text-align:center}.van-field__error-message--right{text-align:right}
\ No newline at end of file
diff --git a/dist/tag/index.js b/dist/tag/index.js
index 2042ebe2..0b1f44c7 100644
--- a/dist/tag/index.js
+++ b/dist/tag/index.js
@@ -1,10 +1,11 @@
 import { VantComponent } from '../common/component';
-import { RED, BLUE, GREEN } from '../common/color';
+import { RED, BLUE, GREEN, ORANGE } from '../common/color';
 const DEFAULT_COLOR = '#999';
 const COLOR_MAP = {
     danger: RED,
     primary: BLUE,
-    success: GREEN
+    success: GREEN,
+    warning: ORANGE
 };
 VantComponent({
     props: {
diff --git a/dist/tree-select/index.wxml b/dist/tree-select/index.wxml
index b5e73dbb..9ada9149 100644
--- a/dist/tree-select/index.wxml
+++ b/dist/tree-select/index.wxml
@@ -1,22 +1,5 @@
 <wxs src="../wxs/utils.wxs" module="utils" />
-
-<wxs module="tsUtil">
-// 判断子项是否被选中
-function isArray (array) {
-  return array instanceof Array;
-}
-function isActive (activeList, itemId) {
-  if (typeof activeList === 'undefined' || activeList == null) return false;
-  if (isArray(activeList)) {
-    return activeList.indexOf(itemId) > -1;
-  }
-  else {
-    return activeList === itemId;
-  }
-}
-
-module.exports.isActive = isActive;
-</wxs>
+<wxs src="./index.wxs" module="wxs" />
 
 <view
   class="van-tree-select"
@@ -41,13 +24,13 @@ module.exports.isActive = isActive;
     <view
       wx:for="{{ subItems }}"
       wx:key="id"
-      class="van-ellipsis van-hairline--bottom content-item-class {{ utils.bem('tree-select__item', { active: tsUtil.isActive(activeId, item.id), disabled: item.disabled }) }} {{ tsUtil.isActive(activeId, item.id) ? 'content-active-class' : '' }} {{ item.disabled ? 'content-disabled-class' : '' }}"
+      class="van-ellipsis van-hairline--bottom content-item-class {{ utils.bem('tree-select__item', { active: wxs.isActive(activeId, item.id), disabled: item.disabled }) }} {{ wxs.isActive(activeId, item.id) ? 'content-active-class' : '' }} {{ item.disabled ? 'content-disabled-class' : '' }}"
       data-item="{{ item }}"
       bind:tap="onSelectItem"
     >
       {{ item.text }}
       <van-icon
-        wx:if="{{ tsUtil.isActive(activeId, item.id) }}"
+        wx:if="{{ wxs.isActive(activeId, item.id) }}"
         name="checked"
         size="16px"
         class="van-tree-select__selected"
diff --git a/dist/tree-select/index.wxs b/dist/tree-select/index.wxs
new file mode 100644
index 00000000..b1cbb39b
--- /dev/null
+++ b/dist/tree-select/index.wxs
@@ -0,0 +1,12 @@
+/* eslint-disable */
+var array = require('../wxs/array.wxs');
+
+function isActive (activeList, itemId) {
+  if (array.isArray(activeList)) {
+    return activeList.indexOf(itemId) > -1;
+  }
+
+  return activeList === itemId;
+}
+
+module.exports.isActive = isActive;
diff --git a/lib/common/color.js b/lib/common/color.js
index be4c57b5..7e8d90ea 100644
--- a/lib/common/color.js
+++ b/lib/common/color.js
@@ -3,3 +3,4 @@ Object.defineProperty(exports, "__esModule", { value: true });
 exports.RED = '#f44';
 exports.BLUE = '#1989fa';
 exports.GREEN = '#07c160';
+exports.ORANGE = '#ff976a';
diff --git a/lib/common/utils.js b/lib/common/utils.js
index 21d51d2d..2af36733 100644
--- a/lib/common/utils.js
+++ b/lib/common/utils.js
@@ -23,3 +23,11 @@ function nextTick(fn) {
     }, 1000 / 30);
 }
 exports.nextTick = nextTick;
+var systemInfo = null;
+function getSystemInfoSync() {
+    if (systemInfo == null) {
+        systemInfo = wx.getSystemInfoSync();
+    }
+    return systemInfo;
+}
+exports.getSystemInfoSync = getSystemInfoSync;
diff --git a/lib/field/index.js b/lib/field/index.js
index 4db86c77..d27057a5 100644
--- a/lib/field/index.js
+++ b/lib/field/index.js
@@ -1,6 +1,7 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 var component_1 = require("../common/component");
+var utils_1 = require("../common/utils");
 component_1.VantComponent({
     field: true,
     classes: ['input-class', 'right-icon-class'],
@@ -68,66 +69,31 @@ component_1.VantComponent({
         }
     },
     data: {
-        showClear: false
-    },
-    beforeCreate: function () {
-        this.focused = false;
+        focused: false,
+        system: utils_1.getSystemInfoSync().system.split(' ').shift().toLowerCase()
     },
     methods: {
         onInput: function (event) {
             var _this = this;
             var _a = (event.detail || {}).value, value = _a === void 0 ? '' : _a;
-            this.set({
-                value: value,
-                showClear: this.getShowClear(value)
-            }, function () {
+            this.set({ value: value }, function () {
                 _this.emitChange(value);
             });
         },
         onFocus: function (event) {
-            var _a = event.detail || {}, _b = _a.value, value = _b === void 0 ? '' : _b, _c = _a.height, height = _c === void 0 ? 0 : _c;
-            this.$emit('focus', { value: value, height: height });
-            this.focused = true;
-            this.blurFromClear = false;
-            this.set({
-                showClear: this.getShowClear()
-            });
+            this.set({ focused: true });
+            this.$emit('focus', event.detail);
         },
         onBlur: function (event) {
-            var _this = this;
-            var _a = event.detail || {}, _b = _a.value, value = _b === void 0 ? '' : _b, _c = _a.cursor, cursor = _c === void 0 ? 0 : _c;
-            this.$emit('blur', { value: value, cursor: cursor });
-            this.focused = false;
-            var showClear = this.getShowClear();
-            if (this.data.value === value) {
-                this.set({
-                    showClear: showClear
-                });
-            }
-            else if (!this.blurFromClear) {
-                // fix: the handwritten keyboard does not trigger input change
-                this.set({
-                    value: value,
-                    showClear: showClear
-                }, function () {
-                    _this.emitChange(value);
-                });
-            }
+            this.set({ focused: false });
+            this.$emit('blur', event.detail);
         },
         onClickIcon: function () {
             this.$emit('click-icon');
         },
-        getShowClear: function (value) {
-            value = value === undefined ? this.data.value : value;
-            return (this.data.clearable && this.focused && value && !this.data.readonly);
-        },
         onClear: function () {
             var _this = this;
-            this.blurFromClear = true;
-            this.set({
-                value: '',
-                showClear: this.getShowClear('')
-            }, function () {
+            this.set({ value: '' }, function () {
                 _this.emitChange('');
                 _this.$emit('clear', '');
             });
diff --git a/lib/field/index.wxml b/lib/field/index.wxml
index 1a3e9afd..d5e70cc1 100644
--- a/lib/field/index.wxml
+++ b/lib/field/index.wxml
@@ -14,15 +14,18 @@
 >
   <slot name="left-icon" slot="icon" />
   <slot name="label" slot="title" />
-  <view class="van-field__body {{ type === 'textarea' ? 'van-field__body--textarea' : '' }}">
+  <view class="{{ utils.bem('field__body', [type, system]) }}">
     <textarea
       wx:if="{{ type === 'textarea' }}"
-      class="input-class {{ utils.bem('field__input', [inputAlign, { disabled, error }]) }}"
+      class="input-class {{ utils.bem('field__input', [inputAlign, type, { disabled, error }]) }}"
       fixed="{{ fixed }}"
       focus="{{ focus }}"
       value="{{ value }}"
       disabled="{{ disabled || readonly }}"
       maxlength="{{ maxlength }}"
+      placeholder="{{ placeholder }}"
+      placeholder-style="{{ placeholderStyle }}"
+      placeholder-class="{{ utils.bem('field__placeholder', { error }) }}"
       auto-height="{{ autosize }}"
       cursor-spacing="{{ cursorSpacing }}"
       adjust-position="{{ adjustPosition }}"
@@ -34,9 +37,6 @@
       bind:focus="onFocus"
       bind:confirm="onConfirm"
     >
-      <view wx:if="{{ value == null || value.length === 0 }}" style="{{ placeholderStyle }}" class="{{ utils.bem('field__placeholder', { error }) }}">
-        {{ placeholder }}
-      </view>
     </textarea>
     <input
       wx:else
@@ -48,7 +48,7 @@
       maxlength="{{ maxlength }}"
       placeholder="{{ placeholder }}"
       placeholder-style="{{ placeholderStyle }}"
-      placeholder-class="{{ error ? 'van-field__placeholder--error' : 'van-field__placeholder' }}"
+      placeholder-class="{{ utils.bem('field__placeholder', { error }) }}"
       confirm-type="{{ confirmType }}"
       confirm-hold="{{ confirmHold }}"
       cursor-spacing="{{ cursorSpacing }}"
@@ -62,7 +62,7 @@
       bind:confirm="onConfirm"
     />
     <van-icon
-      wx:if="{{ showClear }}"
+      wx:if="{{ clearable && focused && value && !readonly }}"
       size="16px"
       name="clear"
       class="van-field__clear-root van-field__icon-root"
diff --git a/lib/field/index.wxss b/lib/field/index.wxss
index c4eade8a..e53fee3e 100644
--- a/lib/field/index.wxss
+++ b/lib/field/index.wxss
@@ -1 +1 @@
-@import '../common/index.wxss';.van-field__body{display:-webkit-flex;display:flex;-webkit-align-items:center;align-items:center}.van-field__body--textarea{min-height:24px}.van-field__input{position:relative;display:block;width:100%;height:24px;min-height:24px;padding:0;margin:0;line-height:inherit;color:#333;text-align:left;background-color:initial;border:0;box-sizing:border-box;resize:none}.van-field__input--error{color:#f44}.van-field__input--disabled{color:#999;background-color:initial;opacity:1}.van-field__input--center{text-align:center}.van-field__input--right{text-align:right}.van-field__placeholder{position:absolute;top:0;right:0;left:0;color:#999;pointer-events:none}.van-field__placeholder--error{color:#f44}.van-field__icon-root{display:-webkit-flex;display:flex;min-height:24px;-webkit-align-items:center;align-items:center}.van-field__clear-root,.van-field__icon-container{padding:0 10px;margin-right:-10px;line-height:inherit;vertical-align:middle}.van-field__button,.van-field__clear-root,.van-field__icon-container{-webkit-flex-shrink:0;flex-shrink:0}.van-field__clear-root{color:#c9c9c9}.van-field__icon-container{color:#999}.van-field__icon-container:empty{display:none}.van-field__button{padding-left:10px}.van-field__button:empty{display:none}.van-field__error-message{font-size:12px;color:#f44;text-align:left}.van-field__error-message--center{text-align:center}.van-field__error-message--right{text-align:right}
\ No newline at end of file
+@import '../common/index.wxss';.van-field__body{display:-webkit-flex;display:flex;-webkit-align-items:center;align-items:center}.van-field__body--textarea{min-height:24px;line-height:1.2em}.van-field__body--textarea.van-field__body--ios{margin-top:-4.5px}.van-field__input{position:relative;display:block;width:100%;height:24px;min-height:24px;padding:0;margin:0;line-height:inherit;color:#333;text-align:left;background-color:initial;border:0;box-sizing:border-box;resize:none}.van-field__input--textarea{height:18px;min-height:18px}.van-field__input--error{color:#f44}.van-field__input--disabled{color:#999;background-color:initial;opacity:1}.van-field__input--center{text-align:center}.van-field__input--right{text-align:right}.van-field__placeholder{position:absolute;top:0;right:0;left:0;color:#999;pointer-events:none}.van-field__placeholder--error{color:#f44}.van-field__icon-root{display:-webkit-flex;display:flex;min-height:24px;-webkit-align-items:center;align-items:center}.van-field__clear-root,.van-field__icon-container{padding:0 10px;margin-right:-10px;line-height:inherit;vertical-align:middle}.van-field__button,.van-field__clear-root,.van-field__icon-container{-webkit-flex-shrink:0;flex-shrink:0}.van-field__clear-root{color:#c9c9c9}.van-field__icon-container{color:#999}.van-field__icon-container:empty{display:none}.van-field__button{padding-left:10px}.van-field__button:empty{display:none}.van-field__error-message{font-size:12px;color:#f44;text-align:left}.van-field__error-message--center{text-align:center}.van-field__error-message--right{text-align:right}
\ No newline at end of file
diff --git a/lib/tag/index.js b/lib/tag/index.js
index e6af2a58..78a78902 100644
--- a/lib/tag/index.js
+++ b/lib/tag/index.js
@@ -6,7 +6,8 @@ var DEFAULT_COLOR = '#999';
 var COLOR_MAP = {
     danger: color_1.RED,
     primary: color_1.BLUE,
-    success: color_1.GREEN
+    success: color_1.GREEN,
+    warning: color_1.ORANGE
 };
 component_1.VantComponent({
     props: {
diff --git a/lib/tree-select/index.wxml b/lib/tree-select/index.wxml
index b5e73dbb..9ada9149 100644
--- a/lib/tree-select/index.wxml
+++ b/lib/tree-select/index.wxml
@@ -1,22 +1,5 @@
 <wxs src="../wxs/utils.wxs" module="utils" />
-
-<wxs module="tsUtil">
-// 判断子项是否被选中
-function isArray (array) {
-  return array instanceof Array;
-}
-function isActive (activeList, itemId) {
-  if (typeof activeList === 'undefined' || activeList == null) return false;
-  if (isArray(activeList)) {
-    return activeList.indexOf(itemId) > -1;
-  }
-  else {
-    return activeList === itemId;
-  }
-}
-
-module.exports.isActive = isActive;
-</wxs>
+<wxs src="./index.wxs" module="wxs" />
 
 <view
   class="van-tree-select"
@@ -41,13 +24,13 @@ module.exports.isActive = isActive;
     <view
       wx:for="{{ subItems }}"
       wx:key="id"
-      class="van-ellipsis van-hairline--bottom content-item-class {{ utils.bem('tree-select__item', { active: tsUtil.isActive(activeId, item.id), disabled: item.disabled }) }} {{ tsUtil.isActive(activeId, item.id) ? 'content-active-class' : '' }} {{ item.disabled ? 'content-disabled-class' : '' }}"
+      class="van-ellipsis van-hairline--bottom content-item-class {{ utils.bem('tree-select__item', { active: wxs.isActive(activeId, item.id), disabled: item.disabled }) }} {{ wxs.isActive(activeId, item.id) ? 'content-active-class' : '' }} {{ item.disabled ? 'content-disabled-class' : '' }}"
       data-item="{{ item }}"
       bind:tap="onSelectItem"
     >
       {{ item.text }}
       <van-icon
-        wx:if="{{ tsUtil.isActive(activeId, item.id) }}"
+        wx:if="{{ wxs.isActive(activeId, item.id) }}"
         name="checked"
         size="16px"
         class="van-tree-select__selected"
diff --git a/lib/tree-select/index.wxs b/lib/tree-select/index.wxs
new file mode 100644
index 00000000..b1cbb39b
--- /dev/null
+++ b/lib/tree-select/index.wxs
@@ -0,0 +1,12 @@
+/* eslint-disable */
+var array = require('../wxs/array.wxs');
+
+function isActive (activeList, itemId) {
+  if (array.isArray(activeList)) {
+    return activeList.indexOf(itemId) > -1;
+  }
+
+  return activeList === itemId;
+}
+
+module.exports.isActive = isActive;