diff --git a/CHANGELOG.md b/CHANGELOG.md
index f98c6d169..3a1a5679d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,12 +1,15 @@
 ## 更新日志
 
 ### 1.0.0-rc.9
-*2016-11-xx*
+
+*2016-11-XX*
+
 - 新增 MessageBox 确定按钮自动获取焦点, #721
 - 修复 Popover focus 失效, #734
 - 修复 Clickoutside 报错, #729
 - 修复 DatePicker 选择日期范围时当选中同一天再调整时间会出错
 - 更新 TimePicker 滚动条在 IE10+ 下隐藏
+- 新增 Dropdown 新增 command api #432
 
 ### 1.0.0-rc.8
 
diff --git a/README.md b/README.md
index 6c4ff561f..80ec53929 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Element
 [![Build Status](https://travis-ci.org/ElemeFE/element.svg?branch=master)](https://travis-ci.org/ElemeFE/element)
 [![Coverage Status](https://coveralls.io/repos/github/ElemeFE/element/badge.svg?branch=master)](https://coveralls.io/github/ElemeFE/element?branch=master)
+[![CDNJS](https://img.shields.io/cdnjs/v/element-ui.svg)](https://cdnjs.com/libraries/element-ui)
 [![npm package](https://img.shields.io/npm/v/element-ui.svg)](https://www.npmjs.org/package/element-ui)
 [![NPM downloads](http://img.shields.io/npm/dm/element-ui.svg)](https://npmjs.org/package/element-ui)
 ![JS gzip size](http://img.badgesize.io/https://unpkg.com/element-ui@next/lib/index.js?compression=gzip&label=gzip%20size:%20JS)
diff --git a/examples/docs/zh-cn/checkbox.md b/examples/docs/zh-cn/checkbox.md
index 2789f6f80..647d16f50 100644
--- a/examples/docs/zh-cn/checkbox.md
+++ b/examples/docs/zh-cn/checkbox.md
@@ -108,38 +108,11 @@
 ```
 :::
 
-### 可切换值的多选框
-
-多选框单独时，除了可以表示为是否选中的逻辑值以外，你还可以设定其选中和未选中所表示的值。
-
-:::demo 使用`true-label`和`false-label`可以自定义选中时和未选中时的值，可以为`String`或`Number`类型。
-
-```html
-<template>
-  <el-checkbox
-    v-model="isValid"
-    true-label="可用"
-    false-label="不可用">
-    {{isValid}}
-  </el-checkbox>
-</template>
-<script>
-  export default {
-    data() {
-      return {
-        isValid: '可用'
-      };
-    }
-  };
-</script>
-```
-:::
-
 ### Checkbox Attributes
 | 参数      | 说明    | 类型      | 可选值       | 默认值   |
 |---------- |-------- |---------- |-------------  |-------- |
-| label     | 选中状态的值（只有在`checkbox-group`下有意义）   | string    |       —        |     —    |
-| true-label | 选中时的值   | string, number    |       —        |     —    |
+| label     | 选中状态的值（只有在`checkbox-group`或者绑定对象类型为`array`时有效）| string    |       —        |     —    |
+| true-label | 选中时的值   | string, number | — |     —    |
 | false-label | 没有选中时的值   | string, number    |      —         |     —    |
 | disabled  | 按钮禁用    | boolean   |  — | false   |
 | checked  | 当前是否勾选    | boolean   |  — | false   |
diff --git a/examples/docs/zh-cn/dropdown.md b/examples/docs/zh-cn/dropdown.md
index 55d77db2f..1121fdd1a 100644
--- a/examples/docs/zh-cn/dropdown.md
+++ b/examples/docs/zh-cn/dropdown.md
@@ -148,7 +148,7 @@
 :::
 
 
-### Attributes
+### Dropdown Attributes
 | 参数          | 说明            | 类型            | 可选值                 | 默认值   |
 |-------------  |---------------- |---------------- |---------------------- |-------- |
 | type          | 菜单按钮类型，同 Button 组件(只在`split-button`为 true 的情况下有效)   | string  |          —             |    —     |
@@ -157,7 +157,13 @@
 | menu-align    | 菜单水平对齐方向     | string          | start, end  | end |
 | trigger       | 触发下拉的行为     | string          | hover, click  | hover |
 
-### Events
+### Dropdown Events
 | 事件名称      | 说明    | 回调参数      |
 |---------- |-------- |---------- |
 | click  | `split-button` 为 true 时，点击左侧按钮的回调 | — |
+| command  | 点击菜单项触发的事件回调 | dropdown-item 的指令 |
+
+### Dropdown Attributes
+| 参数          | 说明            | 类型            | 可选值                 | 默认值   |
+|-------------  |---------------- |---------------- |---------------------- |-------- |
+| command       | 指令     | string          | — | — |
diff --git a/examples/docs/zh-cn/form.md b/examples/docs/zh-cn/form.md
index 141fe6cc2..6f45318c3 100644
--- a/examples/docs/zh-cn/form.md
+++ b/examples/docs/zh-cn/form.md
@@ -13,7 +13,7 @@
             } else {
               callback();
             }
-          } 
+          }
         }, 1000);
       };
       var validaePass = (rule, value, callback) => {
@@ -266,7 +266,7 @@
       .el-textarea {
         width: auto;
       }
-      
+
       .el-select .el-input {
         width: 360px;
       }
@@ -295,7 +295,7 @@
 
 ::: demo 在 Form 组件中，每一个表单域由一个 Form-Item 组件构成，表单域中可以放置各种类型的表单控件，包括 Input、Select、Checkbox、Radio、Switch、DatePicker、TimePicker
 ```html
-<el-form ref="form" :model="form" label-width="80px" @submit.prevent="onSubmit">
+<el-form ref="form" :model="form" label-width="80px" @submit.native.prevent="onSubmit">
   <el-form-item label="活动名称">
     <el-input v-model="form.name"></el-input>
   </el-form-item>
@@ -335,7 +335,7 @@
     <el-input type="textarea" v-model="form.desc"></el-input>
   </el-form-item>
   <el-form-item>
-    <el-button type="primary">立即创建</el-button>
+    <el-button type="primary" native-type="submit">立即创建</el-button>
     <el-button @click.native.prevent>取消</el-button>
   </el-form-item>
 </el-form>
@@ -371,7 +371,7 @@
 
 ::: demo Form 组件的 `type` 属性可以控制表单的类型，当设为 `inline` 时可以让表单域变为行内的表单域
 ```html
-<el-form :inline="true" :model="formInline" @submit.prevent="onSubmit" class="demo-form-inline">
+<el-form :inline="true" :model="formInline" @submit.native.prevent="onSubmit" class="demo-form-inline">
   <el-form-item>
     <el-input v-model="formInline.user" placeholder="审批人"></el-input>
   </el-form-item><el-form-item>
@@ -380,7 +380,7 @@
       <el-option label="区域二" value="beijing"></el-option>
     </el-select>
   </el-form-item><el-form-item>
-    <el-button type="primary">查询</el-button>
+    <el-button native-type="submit" type="primary">查询</el-button>
   </el-form-item>
 </el-form>
 <script>
@@ -473,7 +473,7 @@
 
 ::: demo 通过设置 `label-position` 属性可以改变表单域标签的位置，可选值为 `top`、`left`，当设为 `left` 时标签会变为左对齐
 ```html
-<el-form :model="formAlignLeft" label-position="left" @submit.prevent="onSubmit" label-width="80px">
+<el-form :model="formAlignLeft" label-position="left" @submit.native.prevent="onSubmit" label-width="80px">
   <el-form-item label="活动名称">
     <el-input v-model="formAlignLeft.name"></el-input>
   </el-form-item>
@@ -647,7 +647,7 @@
             } else {
               callback();
             }
-          } 
+          }
         }, 1000);
       };
       var validaePass = (rule, value, callback) => {
diff --git a/examples/docs/zh-cn/select.md b/examples/docs/zh-cn/select.md
index 9ad6d3c61..914966273 100644
--- a/examples/docs/zh-cn/select.md
+++ b/examples/docs/zh-cn/select.md
@@ -306,7 +306,7 @@
 
 适用性较广的基础多选，用 Tag 展示已选项
 
-:::demo 为`el-select`设置`nultiple`属性即可启用多选，此时`v-model`的值为当前选中值所组成的数组
+:::demo 为`el-select`设置`multiple`属性即可启用多选，此时`v-model`的值为当前选中值所组成的数组
 ```html
 <template>
   <el-select v-model="value5" multiple>
diff --git a/examples/docs/zh-cn/table.md b/examples/docs/zh-cn/table.md
index bae43ac6d..21a848996 100644
--- a/examples/docs/zh-cn/table.md
+++ b/examples/docs/zh-cn/table.md
@@ -924,6 +924,7 @@
 | label | 显示的标题 | string | — | — |
 | prop | 对应列内容的字段名，也可以使用 property 属性 | string | — | — |
 | width | 对应列的宽度 | string | — | — |
+| min-width | 对应列的最小宽度，与 width 的区别是 width 是固定的，min-width 会把剩余宽度按比例分配给设置了 min-width 的列 | string | — | — |
 | fixed | 列是否固定在左侧或者右侧，true 表示固定在左侧 | string, boolean | true, left, right | - |
 | sortable | 对应列是否可以排序，如果设置为 'custom'，则代表用户希望远程排序，需要监听 Table 的 sort-change 事件 | boolean, string | true, false, 'custom' | false |
 | sort-method | 对数据进行排序的时候使用的方法，仅当 sortable 设置为 true 的时候有效 | Function(a, b) | - | - |
diff --git a/examples/docs/zh-cn/upload.md b/examples/docs/zh-cn/upload.md
index 423022bee..c4f8f51af 100644
--- a/examples/docs/zh-cn/upload.md
+++ b/examples/docs/zh-cn/upload.md
@@ -144,7 +144,7 @@
 | with-credentials | 支持发送 cookie 凭证信息 | boolean | — | false |
 | show-upload-list | 是否显示已上传文件列表 | boolean | — | true |
 | type | 上传控件类型 | string | select,drag | select |
-| accept | 可选参数, 接受上传的[文件类型](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept), 拖拽文件上传时不受此参数影响 | string | — | — |
+| accept | 可选参数, 接受上传的[文件类型](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept)（thumbnail-mode 模式下此参数无效）| string | — | — |
 | on-preview | 可选参数, 点击已上传的文件链接时的钩子 | function(file) | — | — |
 | on-remove | 可选参数, 文件列表移除文件时的钩子 | function(file, fileList) | — | — |
 | on-success | 可选参数, 文件上传成功时的钩子 | function(file, fileList) | — | — |
diff --git a/packages/date-picker/src/panel/date-range.vue b/packages/date-picker/src/panel/date-range.vue
index f7bbdf842..e92b96982 100644
--- a/packages/date-picker/src/panel/date-range.vue
+++ b/packages/date-picker/src/panel/date-range.vue
@@ -24,7 +24,7 @@
                 <input
                   :placeholder="$t('el.datepicker.startDate')"
                   class="el-date-range-picker__editor"
-                  :value="leftVisibleDate"
+                  :value="minVisibleDate"
                   @input="handleDateInput($event, 'min')"
                   @change="handleDateChange($event, 'min')"/>
               </span>
@@ -32,15 +32,15 @@
                 <input
                   :placeholder="$t('el.datepicker.startTime')"
                   class="el-date-range-picker__editor"
-                  :value="leftVisibleTime"
-                  @focus="leftTimePickerVisible = !leftTimePickerVisible"
+                  :value="minVisibleTime"
+                  @focus="minTimePickerVisible = !minTimePickerVisible"
                   @change="handleTimeChange($event, 'min')"/>
                 <time-picker
-                  :picker-width="leftPickerWidth"
-                  ref="lefttimepicker"
+                  :picker-width="minPickerWidth"
+                  ref="minTimePicker"
                   :date="minDate"
-                  @pick="handleLeftTimePick"
-                  :visible="leftTimePickerVisible">
+                  @pick="handleMinTimePick"
+                  :visible="minTimePickerVisible">
                 </time-picker>
               </span>
             </span>
@@ -48,29 +48,29 @@
             <span class="el-date-range-picker__editors-wrap is-right">
               <span class="el-date-range-picker__time-picker-wrap">
                 <input
-                  ref="leftInput"
+                  ref="minInput"
                   :placeholder="$t('el.datepicker.endDate')"
                   class="el-date-range-picker__editor"
-                  :value="rightVisibleDate"
+                  :value="maxVisibleDate"
                   :readonly="!minDate"
                   @input="handleDateInput($event, 'max')"
                   @change="handleDateChange($event, 'max')" />
               </span>
               <span class="el-date-range-picker__time-picker-wrap">
                 <input
-                  ref="rightInput"
+                  ref="maxInput"
                   :placeholder="$t('el.datepicker.endTime')"
                   class="el-date-range-picker__editor"
-                  :value="rightVisibleTime"
-                  @focus="minDate && (rightTimePickerVisible = !rightTimePickerVisible)"
+                  :value="maxVisibleTime"
+                  @focus="minDate && (maxTimePickerVisible = !maxTimePickerVisible)"
                   :readonly="!minDate"
                   @change="handleTimeChange($event, 'max')" />
                 <time-picker
-                  :picker-width="rightPickerWidth"
-                  ref="righttimepicker"
+                  :picker-width="maxPickerWidth"
+                  ref="maxTimePicker"
                   :date="maxDate"
-                  @pick="handleRightTimePick"
-                  :visible="rightTimePickerVisible"></time-picker>
+                  @pick="handleMaxTimePick"
+                  :visible="maxTimePickerVisible"></time-picker>
               </span>
             </span>
           </div>
@@ -126,9 +126,9 @@
         </div>
       </div>
       <div class="el-picker-panel__footer" v-if="showTime">
-        <!-- <a
+        <a
           class="el-picker-panel__link-btn"
-          @click="changeToToday">{{ $t('el.datepicker.now') }}</a> -->
+          @click="handleClear">{{ $t('el.datepicker.clear') }}</a>
         <button
           type="button"
           class="el-picker-panel__btn"
@@ -175,19 +175,19 @@
         return this.rightDate.getMonth();
       },
 
-      leftVisibleDate() {
+      minVisibleDate() {
         return formatDate(this.minDate);
       },
 
-      rightVisibleDate() {
+      maxVisibleDate() {
         return formatDate(this.maxDate || this.minDate);
       },
 
-      leftVisibleTime() {
+      minVisibleTime() {
         return formatDate(this.minDate, 'HH:mm:ss');
       },
 
-      rightVisibleTime() {
+      maxVisibleTime() {
         return formatDate(this.maxDate, 'HH:mm:ss');
       },
 
@@ -208,8 +208,8 @@
 
     data() {
       return {
-        leftPickerWidth: 0,
-        rightPickerWidth: 0,
+        minPickerWidth: 0,
+        maxPickerWidth: 0,
         date: new Date(),
         minDate: '',
         maxDate: '',
@@ -224,8 +224,8 @@
         value: '',
         visible: '',
         disabledDate: '',
-        leftTimePickerVisible: false,
-        rightTimePickerVisible: false,
+        minTimePickerVisible: false,
+        maxTimePickerVisible: false,
         width: 0
       };
     },
@@ -234,13 +234,13 @@
       showTime(val) {
         if (!val) return;
         this.$nextTick(_ => {
-          const leftInputElm = this.$refs.leftInput;
-          const rightInputElm = this.$refs.rightInput;
-          if (leftInputElm) {
-            this.leftPickerWidth = leftInputElm.getBoundingClientRect().width + 10;
+          const minInputElm = this.$refs.minInput;
+          const maxInputElm = this.$refs.maxInput;
+          if (minInputElm) {
+            this.minPickerWidth = minInputElm.getBoundingClientRect().width + 10;
           }
-          if (rightInputElm) {
-            this.rightPickerWidth = rightInputElm.getBoundingClientRect().width + 10;
+          if (maxInputElm) {
+            this.maxPickerWidth = maxInputElm.getBoundingClientRect().width + 10;
           }
         });
       },
@@ -248,17 +248,24 @@
       minDate() {
         this.$nextTick(() => {
           if (this.maxDate && this.maxDate < this.minDate) {
-            this.maxDate = null;
+            const format = 'HH:mm:ss';
+
+            this.$refs.maxTimePicker.selectableRange = [
+              [
+                parseDate(formatDate(this.minDate, format), format),
+                parseDate('23:59:59', format)
+              ]
+            ];
           }
         });
       },
 
-      leftTimePickerVisible(val) {
-        if (val) this.$nextTick(() => this.$refs.lefttimepicker.ajustScrollTop());
+      minTimePickerVisible(val) {
+        if (val) this.$nextTick(() => this.$refs.minTimePicker.ajustScrollTop());
       },
 
-      rightTimePickerVisible(val) {
-        if (val) this.$nextTick(() => this.$refs.righttimepicker.ajustScrollTop());
+      maxTimePickerVisible(val) {
+        if (val) this.$nextTick(() => this.$refs.maxTimePicker.ajustScrollTop());
       },
 
       value(newVal) {
@@ -273,6 +280,12 @@
     },
 
     methods: {
+      handleClear() {
+        this.minDate = '';
+        this.maxDate = '';
+        this.handleConfirm();
+      },
+
       handleDateInput(event, type) {
         const value = event.target.value;
         const parsedValue = parseDate(value, 'yyyy-MM-dd');
@@ -341,10 +354,8 @@
               this.maxDate = new Date(target.getTime());
             }
           }
-          const l2r = type === 'min' ? 'left' : 'right';
-
-          this.$refs[l2r + 'timepicker'].value = target;
-          this[l2r + 'TimePickerVisible'] = false;
+          this.$refs[type + 'TimePicker'].value = target;
+          this[type + 'TimePickerVisible'] = false;
         }
       },
 
@@ -372,8 +383,8 @@
       },
 
       resetView() {
-        this.leftTimePickerVisible = false;
-        this.rightTimePickerVisible = false;
+        this.minTimePickerVisible = false;
+        this.maxTimePickerVisible = false;
       },
 
       setTime(date, value) {
@@ -387,18 +398,18 @@
         return new Date(oldDate.getTime());
       },
 
-      handleLeftTimePick(value, visible, first) {
+      handleMinTimePick(value, visible, first) {
         this.minDate = this.minDate || new Date();
         if (value) {
           this.minDate = this.setTime(this.minDate, value);
         }
 
         if (!first) {
-          this.leftTimePickerVisible = visible;
+          this.minTimePickerVisible = visible;
         }
       },
 
-      handleRightTimePick(value, visible, first) {
+      handleMaxTimePick(value, visible, first) {
         if (!this.maxDate) {
           const now = new Date();
           if (now >= this.minDate) {
@@ -411,7 +422,7 @@
         }
 
         if (!first) {
-          this.rightTimePickerVisible = visible;
+          this.maxTimePickerVisible = visible;
         }
       },
 
diff --git a/packages/dropdown/src/dropdown-item.vue b/packages/dropdown/src/dropdown-item.vue
index 65e064bed..dc4e30e09 100644
--- a/packages/dropdown/src/dropdown-item.vue
+++ b/packages/dropdown/src/dropdown-item.vue
@@ -9,9 +9,13 @@
 
     mixins: [Emitter],
 
+    props: {
+      command: String
+    },
+
     methods: {
       handleClick(e) {
-        this.dispatch('ElDropdown', 'visible', [false]);
+        this.dispatch('ElDropdown', 'menu-item-click', [this.command, this]);
       }
     }
   };
diff --git a/packages/dropdown/src/dropdown.vue b/packages/dropdown/src/dropdown.vue
index d1bbe88ec..71f21f2d8 100644
--- a/packages/dropdown/src/dropdown.vue
+++ b/packages/dropdown/src/dropdown.vue
@@ -33,7 +33,7 @@
     },
 
     mounted() {
-      this.$on('visible', value => { this.visible = value; });
+      this.$on('menu-item-click', this.handleMenuItemClick);
       this.initEvent();
     },
 
@@ -76,6 +76,10 @@
         } else if (trigger === 'click') {
           triggerElm.addEventListener('click', handleClick);
         }
+      },
+      handleMenuItemClick(command, instance) {
+        this.visible = false;
+        this.$emit('command', command, instance);
       }
     },
 
diff --git a/packages/pagination/src/pagination.js b/packages/pagination/src/pagination.js
index 3a7cef68d..974731581 100644
--- a/packages/pagination/src/pagination.js
+++ b/packages/pagination/src/pagination.js
@@ -309,8 +309,10 @@ export default {
       /* istanbul ignore if */
       if (newVal > 0 && this.internalCurrentPage === 0) {
         this.internalCurrentPage = 1;
+        this.$emit('current-change', 1);
       } else if (this.internalCurrentPage > newVal) {
         this.internalCurrentPage = newVal;
+        this.$emit('current-change', newVal);
       }
     },
 
diff --git a/packages/theme-default/src/alert.css b/packages/theme-default/src/alert.css
index 1bef78464..6aad469cf 100644
--- a/packages/theme-default/src/alert.css
+++ b/packages/theme-default/src/alert.css
@@ -5,12 +5,12 @@
 
   @b alert {
     width: 100%;
-    padding: 8px 16px;
+    padding: var(--alert-padding);
     margin: 0;
     box-sizing: border-box;
-    border-radius: 4px;
+    border-radius: var(--alert-border-radius);
     position: relative;
-    background-color: #fff;
+    background-color: var(--color-white);
     overflow: hidden;
     color: #fff;
     opacity: 1;
@@ -18,19 +18,19 @@
     transition: opacity .2s;
 
     @modifier success {
-      background-color: var(--color-success);
+      background-color: var(--alert-success-color);
     }
 
     @modifier info {
-      background-color: var(--color-info);
+      background-color: var(--alert-info-color);
     }
 
     @modifier warning {
-      background-color: var(--color-warning);
+      background-color: var(--alert-warning-color);
     }
 
     @modifier error {
-      background-color: var(--color-danger);
+      background-color: var(--alert-danger-color);
     }
 
     @e content {
@@ -39,19 +39,19 @@
     }
 
     @e icon {
-      font-size: 16px;
-      width: 16px;
+      font-size: var(--alert-icon-size);
+      width: var(--alert-icon-size);
       display: table-cell;
-      color: #fff;
+      color: var(--color-white);
       vertical-align: middle;
       @when big {
-        font-size: 28px;
-        width: 28px;
+        font-size: var(--alert-icon-large-size);
+        width: var(--alert-icon-large-size);
       }
     }
 
     @e title {
-      font-size: 13px;
+      font-size: var(--alert-title-font-size);
       line-height: 18px;
       @when bold {
         font-weight: bold;
@@ -60,12 +60,12 @@
 
     & .el-alert__description {
       color: #fff;
-      font-size: 12px;
+      font-size: var(--alert-description-font-size-font-size);
       margin: 5px 0 0 0;
     }
 
     @e closebtn {
-      font-size: 12px;
+      font-size: var(--alert-close-font-size);
       color: #fff;
       opacity: 1;
       position: absolute 12px 15px * *;
@@ -73,7 +73,7 @@
 
       @when customed {
         font-style: normal;
-        font-size: 13px;
+        font-size: var(--alert-close-customed-font-size);
         top: 9px;
       }
     }
diff --git a/packages/theme-default/src/common/var.css b/packages/theme-default/src/common/var.css
index ed6a59866..94c544481 100644
--- a/packages/theme-default/src/common/var.css
+++ b/packages/theme-default/src/common/var.css
@@ -1,7 +1,6 @@
 :root {
 
-  /*
-    Transition
+  /* Transition
   -------------------------- */
   --fade-transition: opacity 300ms cubic-bezier(0.23, 1, 0.32, 1);
   --fade-linear-transition: opacity 200ms linear;
@@ -33,11 +32,18 @@
   --border-width-base: 1px;
   --border-style-base: solid;
   --border-color-base: var(--color-grey);
+  --border-color-hover: #8492a6;
   --border-base: var(--border-width-base) var(--border-style-base) var(--border-color-base);
   --border-radius-base: 4px;
+  --border-radius-small: 2px;
   --border-radius-circle: 100%;
   --shadow-base: 0 0 2px rgba(var(--color-black), 0.18), 0 0 1px var(--color-blue-light);
 
+  /* Box-shadow
+  -------------------------- */
+  --box-shadow-base: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04);
+  --box-shadow-dark: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .12);
+
   /* Fill
   -------------------------- */
   --fill-base: var(--color-white);
@@ -124,6 +130,105 @@
 
   --radio-button-font-size: var(--font-size-base);
 
+  /* Select
+  -------------------------- */
+  --select-border-color-hover: var(--border-color-hover);
+  --select-disabled-border: var(--disabled-border-base);
+  --select-font-size: var(--font-size-base);
+  --select-close-hover-color: #99a9bf;
+
+  --select-input-color: var(--color-grey);
+  --select-multiple-input-color: #666;
+  --select-input-focus-background: #2ea0ff;
+  --select-input-font-size: 12px;
+
+  --select-tag-height: 24px;
+  --select-tag-color: var(--color-white);
+  --select-tag-background: var(--color-primary);
+
+  --select-option-color: #475669;
+  --select-option-disabled-color: var(--color-grey);
+  --select-option-height: 36px;
+  --select-option-hover-background: #e5e9f2;
+  --select-option-selected: var(--color-primary);
+  --select-option-selected-hover: #1D8CE0;
+
+  --select-group-color: #999;
+  --select-group-height: 30px;
+  --select-group-font-size: 12px;
+
+  --select-dropdown-background: var(--color-white);
+  --select-dropdown-shadow: var(--box-shadow-base);
+  --select-dropdown-empty-color: #999;
+  --select-dropdown-max-height: 274px;
+  --select-dropdown-padding: 6px 0;
+  --select-dropdown-empty-padding: 10px 0;
+  --select-dropdown-border: solid 1px #d3dce6;
+
+  /* Alert
+  -------------------------- */
+  --alert-padding: 8px 16px;
+  --alert-border-radius: var(--border-radius-base);
+  --alert-title-font-size: 13px;
+  --alert-description-font-size: 12px;
+  --alert-close-font-size: 12px;
+  --alert-close-customed-font-size: 13px;
+
+  --alert-success-color: var(--color-success);
+  --alert-info-color: var(--color-info);
+  --alert-warning-color: var(--color-warning);
+  --alert-danger-color: var(--color-danger);
+
+  --alert-icon-size: 16px;
+  --alert-icon-large-size: 28px;
+
+  /* Message Box
+  -------------------------- */
+  --msgbox-width: 420px;
+  --msgbox-border-radius: 3px;
+  --msgbox-font-size: 16px;
+  --msgbox-content-font-size: 14px;
+  --msgbox-content-color: #475669;
+  --msgbox-error-font-size: 12px;
+
+  --msgbox-success-color: var(--color-success);
+  --msgbox-info-color: var(--color-info);
+  --msgbox-warning-color: var(--color-warning);
+  --msgbox-danger-color: var(--color-danger);
+
+  /* Message
+  -------------------------- */
+  --message-shadow: var(--box-shadow-base);
+  --message-min-width: 300px;
+  --message-padding: 10px 12px;
+  --message-content-color: #8492a6;
+  --message-close-color: var(--color-grey);
+  --message-close-hover-color: #99A9BF;
+
+  --message-success-color: var(--color-success);
+  --message-info-color: var(--color-info);
+  --message-warning-color: var(--color-warning);
+  --message-danger-color: var(--color-danger);
+
+  /* Notification
+  -------------------------- */
+  --notification-width: 330px;
+  --notification-padding: 20px;
+  --notification-shadow: var(--box-shadow-base);
+  --notification-icon-size: 40px;
+  --notification-font-size: var(--font-size-base);
+  --notification-color: #8492a6;
+  --notification-title-font-size: 16px;
+  --notification-title-color: #1f2d3d;
+
+  --notification-close-color: var(--color-grey);
+  --notification-close-hover-color: #99A9BF;
+
+  --notification-success-color: var(--color-success);
+  --notification-info-color: var(--color-info);
+  --notification-warning-color: var(--color-warning);
+  --notification-danger-color: var(--color-danger);
+
   /* Input
   -------------------------- */
   --input-font-size: var(--font-size-base);
@@ -134,7 +239,7 @@
   --input-border: var(--border-base);
   --input-border-color: var(--border-color-base);
   --input-border-radius: var(--border-radius-base);
-  --input-border-color-hover: #8492A6;
+  --input-border-color-hover: var(--border-color-hover);
   --input-fill: #fff;
   --input-fill-disabled: var(--disabled-fill-base);
   --input-color-disabled: var(--font-color-disabled-base);
@@ -142,7 +247,7 @@
   --input-placeholder-color: #99a9bf;
   --input-max-width: 314px;
 
-  --input-hover-border: #8492A6;
+  --input-hover-border: var(--border-color-hover);
 
   --input-focus-border: var(--color-primary);
   --input-focus-fill: #fff;
@@ -182,13 +287,6 @@
   --cascader-menu-option-pinyin-color: #999;
   --cascader-menu-submenu-shadow: 1px 1px 2px rgba(var(--color-black), 0.14), 1px 0 2px rgba(var(--color-black), 0.14);
 
-  /* Tag
-  -------------------------- */
-  --tag-color: var(--font-color-base);
-  --tag-fill: #e2e2e2;
-  --tag-border-radius: var(--border-radius-base);
-  --tag-close-color: #666;
-
   /* Group
   -------------------------- */
   --group-option-flex: 0 0 (1/5) * 100%;
@@ -279,10 +377,23 @@
   --switch-disabled-color: #E5E9F3;
   --switch-disabled-text-color: #F9FAFC;
 
+  --switch-font-size: var(--font-size-base);
+  --switch-core-border-radius: 12px;
+  --switch-size: 46px 22px;
+  --switch-button-size: 16px;
+
   /* Dialog
  -------------------------- */
   --dialog-background-color: var(--color-blue);
   --dialog-footer-background: var(--color-blue-lighter);
+  --dialog-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
+  --dialog-tiny-width: 30%;
+  --dialog-small-width: 50%;
+  --dialog-large-width: 90%;
+  --dialog-close-color: var(--color-grey);
+  --dialog-close-hover-color: var(--color-primary);
+  --dialog-title-font-size: 16px;
+  --dialog-font-size: 14px;
 
   /* Table
  -------------------------- */
@@ -297,7 +408,6 @@
   --pagination-color: #475669;
   --pagination-border-radius: 2px;
   --pagination-button-color: #99a9bf;
-  --pagination-button-disabled-color: #D3DCE6;
   --pagination-button-size: 28px;
   --pagination-button-disabled-color: #e4e4e4;
   --pagination-button-disabled-fill: var(--color-white);
@@ -316,7 +426,7 @@
   --popover-title-color: #1f2d3d;
 
   /* Tooltip
-   -------------------------- */
+  -------------------------- */
   --tooltip-fill: #1f2d3d;
   --tooltip-color: #fff;
   --tooltip-font-size: 12px;
@@ -325,77 +435,93 @@
   --tooltip-padding: 10px;
 
   /* Tag
-   -------------------------- */
-    --tag-padding: 0 5px;
-    --tag-fill: #8492a6;
-    --tag-border: #8492a6;
-    --tag-color: #fff;
-    --tag-font-size: 12px;
-    --tag-border-radius: 4px;
+  -------------------------- */
+  --tag-padding: 0 5px;
+  --tag-fill: #8492a6;
+  --tag-border: #8492a6;
+  --tag-color: #fff;
+  --tag-close-color: #666;
+  --tag-font-size: 12px;
+  --tag-border-radius: 4px;
 
-    --tag-gray-fill: #e5e9f2;
-    --tag-gray-border: #e5e9f2;
-    --tag-gray-color: #475669;
+  --tag-gray-fill: #e5e9f2;
+  --tag-gray-border: #e5e9f2;
+  --tag-gray-color: #475669;
 
-    --tag-primary-fill: rgba(32,159,255,0.10);
-    --tag-primary-border: rgba(32,159,255,0.20);
-    --tag-primary-color: #20a0ff;
+  --tag-primary-fill: rgba(32,159,255,0.10);
+  --tag-primary-border: rgba(32,159,255,0.20);
+  --tag-primary-color: #20a0ff;
 
-    --tag-success-fill: rgba(18,206,102,0.10);
-    --tag-success-border: rgba(18,206,102,0.20);
-    --tag-success-color: #13ce66;
+  --tag-success-fill: rgba(18,206,102,0.10);
+  --tag-success-border: rgba(18,206,102,0.20);
+  --tag-success-color: #13ce66;
 
-    --tag-warning-fill: rgba(247,186,41,0.10);
-    --tag-warning-border: rgba(247,186,41,0.20);
-    --tag-warning-color: #f7ba2a;
+  --tag-warning-fill: rgba(247,186,41,0.10);
+  --tag-warning-border: rgba(247,186,41,0.20);
+  --tag-warning-color: #f7ba2a;
 
-    --tag-danger-fill: rgba(255,73,73,0.10);
-    --tag-danger-border: rgba(255,73,73,0.20);
-    --tag-danger-color: #ff4949;
+  --tag-danger-fill: rgba(255,73,73,0.10);
+  --tag-danger-border: rgba(255,73,73,0.20);
+  --tag-danger-color: #ff4949;
 
   /* Dropdown
-   -------------------------- */
-    --dropdown-menu-box-shadow: 0 0 6px 0 rgba(0,0,0,.12), 0 2px 4px 0 rgba(0,0,0,.12);
-    --dropdown-menuItem-hover-fill: #e5e9f2;
-    --dropdown-menuItem-hover-color: #475669;
+  -------------------------- */
+  --dropdown-menu-box-shadow: var(--box-shadow-dark);
+  --dropdown-menuItem-hover-fill: #e5e9f2;
+  --dropdown-menuItem-hover-color: #475669;
 
   /* Badge
-   -------------------------- */
-   --badge-fill: var(--color-danger);
-   --badge-radius: 10px;
-   --badge-font-size: 12px;
-   --badge-padding: 6px;
-   --badge-size: 18px;
+  -------------------------- */
+  --badge-fill: var(--color-danger);
+  --badge-radius: 10px;
+  --badge-font-size: 12px;
+  --badge-padding: 6px;
+  --badge-size: 18px;
 
-    /*Card
-    --------------------------*/
-    --card-border-color: var(--disabled-border-base);
-    --card-border-radius: 4px;
-    --card-padding: 20px;
+  /* Card
+  --------------------------*/
+  --card-border-color: var(--disabled-border-base);
+  --card-border-radius: 4px;
+  --card-padding: 20px;
 
-  /*Slider
-    --------------------------*/
+  /* Slider
+  --------------------------*/
   --slider-main-background-color: var(--color-primary);
   --slider-runway-background-color: #e5e9f2;
   --slider-button-hover-color: #1d8ce0;
-  --slider-stop-background-color: #c0ccda;
-  --slider-disable-color: #c0ccda;
+  --slider-stop-background-color: var(--color-grey);
+  --slider-disable-color: var(--color-grey);
 
-    /*Steps
-    --------------------------*/
-    --steps-border-color: var(--disabled-border-base);
-    --steps-border-radius: 4px;
-    --steps-padding: 20px;
+  --slider-margin: 20px 0;
+  --slider-border-radius: 3px;
+  --slider-height: 4px;
+  --slider-button-size: 12px;
+  --slider-button-wrapper-size: 36px;
+  --slider-button-wrapper-offset: -16px;
 
-    /*Steps
-    --------------------------*/
-    --menu-item-color: #475669;
-    --menu-item-fill: #eff2f7;
-    --menu-item-hover-fill: #d3dce6;
-    --submenu-item-fill: #e5e9f2;
+  /* Steps
+  --------------------------*/
+  --steps-border-color: var(--disabled-border-base);
+  --steps-border-radius: 4px;
+  --steps-padding: 20px;
 
-    --dark-menu-item-color: #475669;
-    --dark-menu-item-fill: #324057;
-    --dark-menu-item-hover-fill: #475669;
-    --dark-submenu-item-fill: #1f2d3d;
+  /* Steps
+  --------------------------*/
+  --menu-item-color: #475669;
+  --menu-item-fill: #eff2f7;
+  --menu-item-hover-fill: #d3dce6;
+  --submenu-item-fill: #e5e9f2;
+
+  --dark-menu-item-color: #475669;
+  --dark-menu-item-fill: #324057;
+  --dark-menu-item-hover-fill: #475669;
+  --dark-submenu-item-fill: #1f2d3d;
+
+  /* Rate
+  --------------------------*/
+  --rate-height: 20px;
+  --rate-font-size: var(--font-size-base);
+  --rate-icon-size: 18px;
+  --rate-icon-margin: 6px;
+  --rate-icon-color: #C6D1DE;
 }
diff --git a/packages/theme-default/src/dialog.css b/packages/theme-default/src/dialog.css
index ab0ad2300..7bdf1e2b2 100755
--- a/packages/theme-default/src/dialog.css
+++ b/packages/theme-default/src/dialog.css
@@ -9,20 +9,20 @@
     left: 50%;
     transform: translateX(-50%);
     background: #fff;
-    border-radius: 2px;
-    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
+    border-radius: var(--border-radius-small);
+    box-shadow: var(--dialog-box-shadow);
     box-sizing: border-box;
 
     @modifier tiny {
-      width: 30%;
+      width: var(--dialog-tiny-width);
     }
 
     @modifier small {
-      width: 50%;
+      width: var(--dialog-small-width);
     }
 
     @modifier large {
-      width: 90%;
+      width: var(--dialog-large-width);
     }
 
     @modifier full {
@@ -44,16 +44,16 @@
 
     @e close {
       cursor: pointer;
-      color: #C0CCDA;
+      color: var(--dialog-close-color);
 
       &:hover {
-        color: var(--color-primary);
+        color: var(--dialog-close-hover-color);
       }
     }
 
     @e title {
       line-height: 1;
-      font-size: 16px;
+      font-size: var(--dialog-title-font-size);
       font-weight: bold;
       color: #1f2d3d;
     }
@@ -61,7 +61,7 @@
     @e body {
       padding: 30px 20px;
       color: #475669;
-      font-size: 14px;
+      font-size: var(--dialog-font-size);
     }
 
     @e headerbtn {
diff --git a/packages/theme-default/src/message-box.css b/packages/theme-default/src/message-box.css
index ff52ef44d..a4d91ca99 100644
--- a/packages/theme-default/src/message-box.css
+++ b/packages/theme-default/src/message-box.css
@@ -12,9 +12,9 @@
     left: 50%;
     transform: translate3d(-50%, -50%, 0);
     background-color: #fff;
-    width: 420px;
-    border-radius: 3px;
-    font-size: 16px;
+    width: var(--msgbox-width);
+    border-radius: var(--msgbox-border-radius);
+    font-size: var(--msgbox-font-size);
     -webkit-user-select: none;
     overflow: hidden;
     backface-visibility: hidden;
@@ -25,8 +25,8 @@
 
     @e content {
       padding: 30px 20px;
-      color: #475669;
-      font-size: 14px;
+      color: var(--msgbox-content-color);
+      font-size: var(--msgbox-content-font-size);
       position: relative;
     }
 
@@ -48,16 +48,16 @@
     @e input {
       padding-top: 15px;
       & input.invalid {
-        border-color: #ff4949;
+        border-color: var(--color-danger);
         &:focus {
-          border-color: #ff4949;
+          border-color: var(--color-danger);
         }
       }
     }
 
     @e errormsg {
-      color: red;
-      font-size: 12px;
+      color: var(--color-danger);
+      font-size: var(--msgbox-error-font-size);
       min-height: 18px;
       margin-top: 2px;
     }
@@ -65,7 +65,7 @@
     @e title {
       padding-left: 0;
       margin-bottom: 0;
-      font-size: 16px;
+      font-size: var(--msgbox-font-size);
       font-weight: bold;
       height: 18px;
       color: #333;
@@ -100,19 +100,19 @@
       font-size: 36px !important;
 
       &.el-icon-circle-check {
-        color: #13ce66;
+        color: var(--msgbox-success-color);
       }
 
       &.el-icon-information {
-        color: #50bfff;
+        color: var(--msgbox-info-color);
       }
 
       &.el-icon-warning {
-        color: #f7ba2a;
+        color: var(--msgbox-warning-color);
       }
 
       &.el-icon-circle-cross {
-        color: #ff4949;
+        color: var(--msgbox-error-color);
       }
     }
   }
diff --git a/packages/theme-default/src/message.css b/packages/theme-default/src/message.css
index d7ac24ed9..3899245ed 100644
--- a/packages/theme-default/src/message.css
+++ b/packages/theme-default/src/message.css
@@ -4,11 +4,11 @@
 @component-namespace el {
 
   @b message {
-    box-shadow:0 2px 4px 0 rgba(0, 0, 0, .12), 0 0 6px 0 rgba(0, 0, 0, .04);
-    min-width: 300px;
-    padding: 10px 12px;
+    box-shadow: var(--message-shadow);
+    min-width: var(--message-min-width);
+    padding: var(--message-padding);
     box-sizing: border-box;
-    border-radius: 2px;
+    border-radius: var(--border-radius-small);
     position: fixed;
     left: 50%;
     top: 20px;
@@ -23,11 +23,11 @@
       position: relative;
 
       & p {
-        font-size: 14px;
+        font-size: var(--font-size-base);
         line-height: 20px;
         margin: 0 34px 0 0;
         white-space: nowrap;
-        color: #8492a6;
+        color: var(--message-content-color);
         text-align: justify;
       }
     }
@@ -42,28 +42,28 @@
     @e closeBtn {
       position: absolute 3px 0 * *;
       cursor: pointer;
-      color: #C0CCDA;
-      font-size: 14px;
+      color: var(--message-close-color);
+      font-size: var(--font-size-base);
 
       &:hover {
-        color: #99A9BF;
+        color: var(--message-close-hover-color);
       }
     }
 
     & .el-icon-circle-check {
-      color: #13ce66;
+      color: var(--message-success-color);
     }
 
     & .el-icon-circle-cross {
-      color: #ff4949;
+      color: var(--message-danger-color);
     }
 
     & .el-icon-information {
-      color: #50bfff;
+      color: var(--message-info-color);
     }
 
     & .el-icon-warning {
-      color: #f7ba2a;
+      color: var(--message-warning-color);
     }
   }
 
diff --git a/packages/theme-default/src/notification.css b/packages/theme-default/src/notification.css
index 71fd05fd7..b6952c296 100644
--- a/packages/theme-default/src/notification.css
+++ b/packages/theme-default/src/notification.css
@@ -4,36 +4,36 @@
 @component-namespace el {
 
   @b notification {
-    width: 330px;
-    padding: 20px;
+    width: var(--notification-width);
+    padding: var(--notification-padding);
     box-sizing: border-box;
-    border-radius: 2px;
+    border-radius: var(--border-radius-small);
     position: fixed;
     right: 16px;
     background-color: #fff;
-    box-shadow: 0 0 6px rgba(0, 0, 0, .04), 0 2px 4px rgba(0, 0, 0, .12);
+    box-shadow: var(--notification-shadow);
     transition: opacity 0.3s, transform .3s, right .3s, top 0.4s;
     overflow: hidden;
     z-index: var(--index-popper);
 
     @e group {
       & span {
-        font-size: 16px;
-        color: #1f2d3d;
+        font-size: var(--notification-title-font-size);
+        color: var(--notification-title-color);
       }
 
       & p {
-        font-size: 14px;
+        font-size: var(--notification-font-size);
         line-height: 21px;
         margin: 10px 0 0 0;
-        color: #8492a6;
+        color: var(--notification-color);
         text-align: justify;
       }
     }
 
     @e icon {
-      size: 40px;
-      font-size: 40px;
+      size: var(--notification-icon-size);
+      font-size: var(--notification-icon-size);
       float: left;
       position: relative;
       top: 3px;
@@ -42,28 +42,28 @@
     @e closeBtn {
       position: absolute 20px 20px * *;
       cursor: pointer;
-      color: #C0CCDA;
-      font-size: 14px;
+      color: var(--notification-close-color);
+      font-size: var(--notification-font-size);
 
       &:hover {
-        color: #99A9BF;
+        color: var(--notification-close-hover-color);
       }
     }
 
     & .el-icon-circle-check {
-      color: #13ce66;
+      color: var(--notification-success-color);
     }
 
     & .el-icon-circle-cross {
-      color: #ff4949;
+      color: var(--notification-danger-color);
     }
 
     & .el-icon-information {
-      color: #50bfff;
+      color: var(--notification-info-color);
     }
 
     & .el-icon-warning {
-      color: #f7ba2a;
+      color: var(--notification-warning-color);
     }
   }
 
diff --git a/packages/theme-default/src/option-group.css b/packages/theme-default/src/option-group.css
index 22c19b168..9682c160c 100644
--- a/packages/theme-default/src/option-group.css
+++ b/packages/theme-default/src/option-group.css
@@ -15,10 +15,10 @@
 
     @e title {
       padding-left: 10px;
-      font-size: 12px;
-      color: #999;
-      height: 30px;
-      line-height: 30px;
+      font-size: var(--select-group-font-size);
+      color: var(--select-group-color);
+      height: var(--select-group-height);
+      line-height: var(--select-group-height);
     }
 
     & .el-select-dropdown__item {
diff --git a/packages/theme-default/src/option.css b/packages/theme-default/src/option.css
index 48f545dd0..a0b9eb5fe 100644
--- a/packages/theme-default/src/option.css
+++ b/packages/theme-default/src/option.css
@@ -5,37 +5,37 @@
 
   @b select-dropdown {
     @e item {
-      font-size: 14px;
+      font-size: var(--select-font-size);
       padding: 8px 10px;
       position: relative;
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
-      color: #475669;
-      height: 36px;
+      color: var(--select-option-color);
+      height: var(--select-option-height);
       line-height: 1.5;
       box-sizing: border-box;
       cursor: pointer;
 
       @when disabled {
-        color: #c0ccda;
+        color: var(--select-option-disabled-color);
         cursor: not-allowed;
 
         &:hover {
-          background-color: #fff;
+          background-color: var(--color-white);
         }
       }
 
       &.hover {
-        background-color: #e5e9f2;
+        background-color: var(--select-option-hover-background);
       }
 
       &.selected {
-        color: #fff;
-        background-color: #20A0FF;
+        color: var(--color-white);
+        background-color: var(--select-option-selected);
 
         &.hover {
-          background-color: #1D8CE0;
+          background-color: var(--select-option-selected-hover);
         }
       }
 
diff --git a/packages/theme-default/src/rate.css b/packages/theme-default/src/rate.css
index fde86c6bc..7f08c3e4e 100644
--- a/packages/theme-default/src/rate.css
+++ b/packages/theme-default/src/rate.css
@@ -4,7 +4,7 @@
 @component-namespace el {
 
   @b rate {
-    height: 20px;
+    height: var(--rate-height);
     @e item {
       display: inline-block;
       position: relative;
@@ -15,9 +15,9 @@
     @e icon {
       position: relative;
       display: inline-block;
-      font-size: 18px;
-      margin-right: 6px;
-      color: #C6D1DE;
+      font-size: var(--rate-icon-size);
+      margin-right: var(--rate-icon-margin);
+      color: var(--rate-icon-color);
       transition: .3s;
       &.hover {
         transform: scale(1.15);
@@ -39,7 +39,7 @@
     }
 
     @e text {
-      font-size: 14px;
+      font-size: var(--rate-font-size);
       vertical-align: middle;
     }
   }
diff --git a/packages/theme-default/src/select-dropdown.css b/packages/theme-default/src/select-dropdown.css
index c463f0982..2c0ce7c39 100644
--- a/packages/theme-default/src/select-dropdown.css
+++ b/packages/theme-default/src/select-dropdown.css
@@ -6,20 +6,20 @@
   @b select-dropdown {
     position: absolute;
     z-index: 1001;
-    border: solid 1px #d3dce6;
-    border-radius: 2px;
-    background-color: #fff;
-    box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04);
+    border: var(--select-dropdown-border);
+    border-radius: var(--border-radius-small);
+    background-color: var(--select-dropdown-background);
+    box-shadow: var(--select-dropdown-shadow);
     box-sizing: border-box;
     margin: 5px 0;
 
     @when multiple {
       & .el-select-dropdown__item.selected {
-        color: #20A0FF;
-        background-color: #fff;
+        color: var(--select-option-selected);
+        background-color: var(--select-dropdown-background);
 
         &.hover {
-          background-color: #E5E9F2;
+          background-color: var(--select-option-hover-background);
         }
 
         &::after {
@@ -36,19 +36,19 @@
   }
 
   @b select-dropdown__empty {
-    padding: 10px 0;
+    padding: var(--select-dropdown-empty-padding);
     margin: 0;
     text-align: center;
-    color: #999;
-    font-size: 14px;
+    color: var(--select-dropdown-empty-color);
+    font-size: var(--select-font-size);
   }
 
   @b select-dropdown__list {
     list-style: none;
-    padding: 6px 0;
+    padding: var(--select-dropdown-padding);
     margin: 0;
     width: 100%;
-    max-height: 274px;
+    max-height: var(--select-dropdown-max-height);
     box-sizing: border-box;
     overflow-y: auto;
   }
diff --git a/packages/theme-default/src/select.css b/packages/theme-default/src/select.css
index 32d0db526..f42d20968 100644
--- a/packages/theme-default/src/select.css
+++ b/packages/theme-default/src/select.css
@@ -14,21 +14,21 @@
 
     @when small {
       & input {
-        border-radius: 2px;
+        border-radius: var(--border-radius-small);
         height: 28px;
       }
     }
 
     &:hover {
       .el-input__inner {
-        border-color: #8492a6;
+        border-color: var(--select-border-color-hover);
       }
     }
 
     & .el-input {
       & .el-input__icon {
-        color: #c0ccda;
-        font-size: 12px;
+        color: var(--select-input-color);
+        font-size: var(--select-input-font-size);
         transition: transform .3s;
         transform: translateY(-50%) rotateZ(180deg);
         line-height: 16px;
@@ -42,15 +42,15 @@
         @when show-close {
           transition: 0s;
           size: 16px;
-          font-size: 14px;
+          font-size: var(--select-font-size);
           right: 8px;
           text-align: center;
           transform: translateY(-50%) rotateZ(180deg);
-          border-radius: 50%;
-          color: #C0CCDA;
+          border-radius: var(--border-radius-circle);
+          color: var(--select-input-color);
 
           &:hover {
-            color: #99A9BF;
+            color: var(--select-close-hover-color);
           }
         }
       }
@@ -59,7 +59,7 @@
         cursor: pointer;
 
         &:focus {
-          border-color: #2ea0ff;
+          border-color: var(--select-input-focus-background);
         }
       }
 
@@ -68,7 +68,7 @@
           cursor: not-allowed;
 
           &:hover {
-            border-color: #D3DCE6;
+            border-color: var(--select-disabled-border);
           }
         }
       }
@@ -79,8 +79,8 @@
       outline: none;
       padding: 0;
       margin: 4px 0 -3px 10px;
-      color: #666;
-      font-size: 14px;
+      color: var(--select-multiple-input-color);
+      font-size: var(--select-font-size);
       vertical-align: baseline;
       appearance: none;
       height: 28px;
@@ -93,12 +93,12 @@
       top: 8px;
       z-index: var(--index-top);
       right: 25px;
-      color: #c0ccda;
+      color: var(--select-input-color);
       line-height: 18px;
-      font-size: 12px;
+      font-size: var(--select-input-font-size);
 
       &:hover {
-        color: #99A9BF;
+        color: var(--select-close-hover-color);
       }
     }
 
@@ -114,23 +114,23 @@
     }
 
     & .el-tag {
-      height: 24px;
-      line-height: 24px;
+      height: var(--select-tag-height);
+      line-height: var(--select-tag-height);
       box-sizing: border-box;
       margin: 6px 0 0 6px;
     }
 
     @e tag {
       display: inline-block;
-      height: 24px;
-      line-height: 24px;
-      font-size: 14px;
-      border-radius: 4px;
-      color: #fff;
-      background-color: #20a0ff;
+      height: var(--select-tag-height);
+      line-height: var(--select-tag-height);
+      font-size: var(--select-font-size);
+      border-radius: var(--border-radius-base);
+      color: var(--select-tag-color);
+      background-color: var(--select-tag-background);
 
       & .el-icon-close {
-        font-size: 12px;
+        font-size: var(--select-input-font-size);
       }
     }
   }
diff --git a/packages/theme-default/src/slider.css b/packages/theme-default/src/slider.css
index 9c6144fc0..68f282194 100644
--- a/packages/theme-default/src/slider.css
+++ b/packages/theme-default/src/slider.css
@@ -8,10 +8,10 @@
     @utils-clearfix;
     @e runway {
       width: 100%;
-      height: 4px;
-      margin: 20px 0;
+      height: var(--slider-height);
+      margin: var(--slider-margin);
       background-color: var(--slider-runway-background-color);
-      border-radius: 3px;
+      border-radius: var(--slider-border-radius);
       position: relative;
       cursor: pointer;
       vertical-align: middle;
@@ -64,18 +64,18 @@
     }
 
     @e bar {
-      height: 4px;
+      height: var(--slider-height);
       background-color: var(--slider-main-background-color);
-      border-top-left-radius: 3px;
-      border-bottom-left-radius: 3px;
+      border-top-left-radius: var(--slider-border-radius);
+      border-bottom-left-radius: var(--slider-border-radius);
       position: absolute;
     }
 
     @e button-wrapper {
-      size: 36px;
+      size: var(--slider-button-wrapper-size);
       position: absolute;
       z-index: 1001;
-      top: -16px;
+      top: var(--slider-button-wrapper-offset);
       transform: translateX(-50%);
       background-color: transparent;
       text-align: center;
@@ -95,7 +95,7 @@
     }
 
     @e button {
-      size: 12px;
+      size: var(--slider-button-size);
       background-color: var(--slider-main-background-color);
       border-radius: 50%;
       transition: .2s;
@@ -119,8 +119,8 @@
 
     @e stop {
       position: absolute;
-      size: 4px;
-      border-radius: 50%;
+      size: var(--slider-height);
+      border-radius: var(--border-radius-circle);
       background-color: var(--slider-stop-background-color);
       transform: translateX(-50%);
     }
diff --git a/packages/theme-default/src/switch.css b/packages/theme-default/src/switch.css
index 5678d9166..e2630d825 100644
--- a/packages/theme-default/src/switch.css
+++ b/packages/theme-default/src/switch.css
@@ -6,8 +6,7 @@
   @b switch {
     display: inline-block;
     position: relative;
-    line-height: 20px;
-    font-size: 14px;
+    font-size: var(--switch-font-size);
     @when disabled {
       & .el-switch__core,
       & .el-switch__label {
@@ -19,11 +18,11 @@
       transition: .2s;
       position: absolute;
       z-index: 10;
-      size: 46px 22px;
+      size: var(--switch-size);
       left: 0;
       top: 0;
       display: inline-block;
-      font-size: 14px;
+      font-size: var(--switch-font-size);
       cursor: pointer;
       user-select: none;
       @m left {
@@ -40,7 +39,7 @@
         line-height: 1;
         top: 4px;
         position: absolute;
-        font-size: 14px;
+        font-size: var(--switch-font-size);
         display: inline-block;
         color: var(--color-white);
       }
@@ -58,10 +57,10 @@
       display: inline-block;
       vertical-align: middle;
       position: relative;
-      size: 46px 22px;
+      size: var(--switch-size);
       border: 1px solid var(--switch-off-color);
       outline: none;
-      border-radius: 12px;
+      border-radius: var(--switch-core-border-radius);
       box-sizing: border-box;
       background: var(--switch-off-color);
       cursor: pointer;
@@ -69,9 +68,9 @@
 
       & .el-switch__button {
         position: absolute 0 * * 0;
-        border-radius: 15px;
+        border-radius: var(--border-radius-circle);
         transition: transform .3s;
-        size: 16px;
+        size: var(--switch-button-size);
         z-index: 20;
         background-color: var(--color-white);
       }
diff --git a/src/locale/lang/de.js b/src/locale/lang/de.js
index 3392c9f72..747ac1980 100644
--- a/src/locale/lang/de.js
+++ b/src/locale/lang/de.js
@@ -4,7 +4,7 @@ export default {
       now: 'jetzt',
       today: 'heute',
       cancel: 'abbrechen',
-      // clear: 'leeren',
+      clear: 'leeren',
       confirm: 'OK',
       selectDate: 'Datum wählen',
       selectTime: 'Zeit wählen',
diff --git a/src/locale/lang/en.js b/src/locale/lang/en.js
index 94ed25c1e..01cd29079 100644
--- a/src/locale/lang/en.js
+++ b/src/locale/lang/en.js
@@ -4,7 +4,7 @@ export default {
       now: 'Now',
       today: 'Today',
       cancel: 'Cancel',
-      // clear: 'Clear',
+      clear: 'Clear',
       confirm: 'OK',
       selectDate: 'Select date',
       selectTime: 'Select time',
diff --git a/src/locale/lang/zh-cn.js b/src/locale/lang/zh-cn.js
index 1508c4206..1614dff0d 100644
--- a/src/locale/lang/zh-cn.js
+++ b/src/locale/lang/zh-cn.js
@@ -4,7 +4,7 @@ export default {
       now: '此刻',
       today: '今天',
       cancel: '取消',
-      // clear: '清空',
+      clear: '清空',
       confirm: '确定',
       selectDate: '选择日期',
       selectTime: '选择时间',
diff --git a/test/unit/specs/dropdown.spec.js b/test/unit/specs/dropdown.spec.js
index 1aedc8fea..89e09605b 100644
--- a/test/unit/specs/dropdown.spec.js
+++ b/test/unit/specs/dropdown.spec.js
@@ -1,4 +1,4 @@
-import { createVue, triggerEvent } from '../util';
+import { createVue, triggerEvent, destroyVM } from '../util';
 
 describe('Dropdown', () => {
   it('create', done => {
@@ -29,6 +29,7 @@ describe('Dropdown', () => {
       triggerEvent(triggerElm, 'mouseleave');
       setTimeout(_ => {
         expect(dropdown.visible).to.not.true;
+        destroyVM(vm);
         done();
       }, 300);
     }, 400);
@@ -36,43 +37,37 @@ describe('Dropdown', () => {
   it('menu click', done => {
     const vm = createVue({
       template: `
-        <el-dropdown>
+        <el-dropdown ref="dropdown">
           <span class="el-dropdown-link">
             下拉菜单<i class="el-icon-caret-bottom el-icon-right"></i>
           </span>
           <el-dropdown-menu slot="dropdown" class="dropdown-test-menu-click">
-            <el-dropdown-item>黄金糕</el-dropdown-item>
-            <el-dropdown-item @click.native="handleClick">狮子头</el-dropdown-item>
-            <el-dropdown-item>螺蛳粉</el-dropdown-item>
-            <el-dropdown-item>双皮奶</el-dropdown-item>
-            <el-dropdown-item>蚵仔煎</el-dropdown-item>
+            <el-dropdown-item command="a">黄金糕</el-dropdown-item>
+            <el-dropdown-item command="b">狮子头</el-dropdown-item>
+            <el-dropdown-item ref="commandC" command="c">螺蛳粉</el-dropdown-item>
+            <el-dropdown-item command="d">双皮奶</el-dropdown-item>
+            <el-dropdown-item command="e">蚵仔煎</el-dropdown-item>
           </el-dropdown-menu>
         </el-dropdown>
-      `,
-      data() {
-        return {
-          clickedItem: ''
-        };
-      },
-      methods: {
-        handleClick(ev) {
-          this.clickedItem = ev.target.innerText;
-        }
-      }
+      `
     }, true);
-    let dropdownElm = vm.$el;
+    let dropdown = vm.$refs.dropdown;
+    let dropdownElm = dropdown.$el;
     let triggerElm = dropdownElm.children[0];
+    let callback = sinon.spy();
+
+    dropdown.$on('command', callback);
 
     triggerEvent(triggerElm, 'mouseenter');
     setTimeout(_ => {
-      let dropdownMenu = document.querySelector('.dropdown-test-menu-click');
-      dropdownMenu.children[1].click();
+      vm.$refs.commandC.$el.click();
       setTimeout(_ => {
-        expect(dropdownMenu.style.display).to.be.equal('none');
-        expect(vm.clickedItem).to.be.equal('狮子头');
+        expect(dropdown.visible).to.not.true;
+        expect(callback.calledWith('c')).to.be.true;
+        destroyVM(vm);
         done();
-      }, 600);
-    }, 400);
+      }, 300);
+    }, 300);
   });
   it('trigger', done => {
     const vm = createVue({
@@ -89,17 +84,7 @@ describe('Dropdown', () => {
             <el-dropdown-item>蚵仔煎</el-dropdown-item>
           </el-dropdown-menu>
         </el-dropdown>
-      `,
-      data() {
-        return {
-          clickedItem: ''
-        };
-      },
-      methods: {
-        handleClick(ev) {
-          this.clickedItem = ev.target.innerText;
-        }
-      }
+      `
     }, true);
     let dropdownElm = vm.$el;
     let dropdown = vm.$refs.dropdown;
@@ -109,9 +94,10 @@ describe('Dropdown', () => {
     dropdown.$nextTick(_ => {
       expect(dropdown.visible).to.not.true;
 
-      dropdownElm.children[0].click();
+      triggerElm.click();
       dropdown.$nextTick(_ => {
         expect(dropdown.visible).to.be.true;
+        destroyVM(vm);
         done();
       });
     });
@@ -119,7 +105,7 @@ describe('Dropdown', () => {
   it('split button', done => {
     const vm = createVue({
       template: `
-        <el-dropdown split-button type="primary" @click="handleClick" ref="dropdown">
+        <el-dropdown split-button type="primary" ref="dropdown">
           更多菜单
           <el-dropdown-menu slot="dropdown" class="dropdown-test-split-button">
             <el-dropdown-item>黄金糕</el-dropdown-item>
@@ -129,22 +115,20 @@ describe('Dropdown', () => {
             <el-dropdown-item>蚵仔煎</el-dropdown-item>
           </el-dropdown-menu>
         </el-dropdown>
-      `,
-      data() {
-        return {
-          btnClicked: false
-        };
-      },
-      methods: {
-        handleClick(ev) {
-          this.btnClicked = true;
-        }
-      }
+      `
     }, true);
 
     let dropdown = vm.$refs.dropdown;
     let dropdownElm = dropdown.$el;
     let triggerElm = dropdownElm.querySelector('.el-dropdown__caret-button');
+    var callback = sinon.spy();
+
+    dropdown.$on('click', callback);
+    dropdownElm.querySelector('.el-button').click();
+
+    setTimeout(_ => {
+      expect(callback.called).to.be.true;
+    }, 300);
 
     triggerEvent(triggerElm, 'mouseenter');
     setTimeout(_ => {
@@ -153,8 +137,9 @@ describe('Dropdown', () => {
       triggerEvent(triggerElm, 'mouseleave');
       setTimeout(_ => {
         expect(dropdown.visible).to.not.true;
+        destroyVM(vm);
         done();
-      }, 400);
-    }, 400);
+      }, 300);
+    }, 300);
   });
 });