diff --git a/docs/demos/views/field.vue b/docs/demos/views/field.vue
index f0c78ea46..87057b8f1 100644
--- a/docs/demos/views/field.vue
+++ b/docs/demos/views/field.vue
@@ -14,7 +14,7 @@
           icon="clear"
           :placeholder="$t('usernamePlaceholder')"
           required
-          @clickIcon="username = ''"
+          @click-icon="username = ''"
         >
         </van-field>
 
diff --git a/docs/demos/views/toast.vue b/docs/demos/views/toast.vue
index 61d58208f..236cb98f8 100644
--- a/docs/demos/views/toast.vue
+++ b/docs/demos/views/toast.vue
@@ -67,14 +67,14 @@ export default {
       const toast = Toast.loading({
         duration: 0,
         forbidClick: true,
-        message: this.$t('text4')(3)
+        message: this.$t('text4', 3)
       });
 
       let second = 3;
       const timer = setInterval(() => {
         second--;
         if (second) {
-          toast.message = this.$t('text4')(second);
+          toast.message = this.$t('text4', second);
         } else {
           clearInterval(timer);
           Toast.clear();
diff --git a/docs/markdown/en-US/layout.md b/docs/markdown/en-US/layout.md
index 0a65a42f4..9ff9c2b05 100644
--- a/docs/markdown/en-US/layout.md
+++ b/docs/markdown/en-US/layout.md
@@ -56,11 +56,9 @@ Set grid spacing using `gutter` attribute. The default value is 0
 | Attribute | Description | Type | Default | Accepted Values |
 |-----------|-----------|-----------|-------------|-------------|
 | gutter | grid spacing（px） | `String | Number` | - | - |
-| prefix | className prefix | `String` | `van` | - |
 
 #### Column
 | Attribute | Description | Type | Default | Accepted Values |
 |-----------|-----------|-----------|-------------|-------------|
 | span | number of column the grid spans | `String | Number` | - | - |
 | offset | number of spacing on the left side of the grid | `String | Number` | - | - |
-| prefix | className prefix | `String` | `van` | - |
diff --git a/docs/markdown/zh-CN/layout.md b/docs/markdown/zh-CN/layout.md
index c9a01eb4a..de7a665d2 100644
--- a/docs/markdown/zh-CN/layout.md
+++ b/docs/markdown/zh-CN/layout.md
@@ -52,11 +52,9 @@ Layout 组件提供了`24列栅格`，通过在`Col`上添加`span`属性设置
 | 参数 | 说明 | 类型 | 默认值 | 可选值 |
 |-----------|-----------|-----------|-------------|-------------|
 | gutter | 列元素之间的间距（单位为px） | `String | Number` | - | - |
-| prefix | className 前缀 | `String` | `van` | - |
 
 #### Column
 | 参数 | 说明 | 类型 | 默认值 | 可选值 |
 |-----------|-----------|-----------|-------------|-------------|
 | span | 列元素宽度 | `String | Number` | - | - |
 | offset | 列元素偏移距离 | `String | Number` | - | - |
-| prefix | className 前缀 | `String` | `van` | - |
diff --git a/package.json b/package.json
index 81e4253f3..d64c2611e 100644
--- a/package.json
+++ b/package.json
@@ -106,7 +106,7 @@
     "style-loader": "^0.19.0",
     "uppercamelcase": "^3.0.0",
     "url-loader": "^0.6.2",
-    "vant-doc": "0.3.17",
+    "vant-doc": "0.3.18",
     "vue": "^2.5.3",
     "vue-loader": "^13.5.0",
     "vue-markdown-loader": "^2.2.3",
diff --git a/packages/actionsheet/index.vue b/packages/actionsheet/index.vue
index dff11f5da..753bfb55a 100644
--- a/packages/actionsheet/index.vue
+++ b/packages/actionsheet/index.vue
@@ -10,7 +10,8 @@
           v-for="(item, index) in actions"
           :key="index"
           :class="['van-actionsheet__item', 'van-hairline--top', item.className, { 'van-actionsheet__item--loading': item.loading }]"
-          @click.stop="onClickItem(item)">
+          @click.stop="onClickItem(item)"
+        >
           <template v-if="!item.loading">
             <span class="van-actionsheet__name">{{ item.name }}</span>
             <span class="van-actionsheet__subname" v-if="item.subname">{{ item.subname }}</span>
@@ -18,8 +19,13 @@
           <van-loading v-else class="van-actionsheet__loading" type="circle" color="black" />
         </li>
       </ul>
-      <div class="van-actionsheet__item van-actionsheet__cancel van-hairline--top" @click.stop="$emit('input', false)" v-if="cancelText">{{ cancelText }}</div>
-      <div class="van-actionsheet__content" v-else>
+      <div
+        v-if="cancelText"
+        v-text="cancelText"
+        class="van-actionsheet__item van-actionsheet__cancel van-hairline--top"
+        @click.stop="$emit('input', false)"
+      />
+      <div v-else class="van-actionsheet__content">
         <slot></slot>
       </div>
     </div>
@@ -43,18 +49,16 @@ export default {
 
   props: {
     value: Boolean,
+    title: String,
+    cancelText: String,
     actions: {
       type: Array,
       default: () => []
     },
-    title: String,
-    cancelText: String,
     overlay: {
-      type: Boolean,
       default: true
     },
     closeOnClickOverlay: {
-      type: Boolean,
       default: true
     }
   },
diff --git a/packages/address-edit/theme.md b/packages/address-edit/theme.md
deleted file mode 100644
index 73cfeec5a..000000000
--- a/packages/address-edit/theme.md
+++ /dev/null
@@ -1,55 +0,0 @@
-## 定制主题
-
-`Vant`提供了一套默认主题，CSS 命名采用 BEM 的风格，方便使用者覆盖样式。如果你想完全替换主题色或者其他样式，可以使用下面的方法：
-
-### 方案一. PostCSS 插件
-在项目中直接引入组件对应的 postcss 源代码，并通过 postcss 插件 [postcss-theme-variables](https://www.npmjs.com/package/postcss-theme-variables) 替换颜色变量，步骤如下：
-
-```javascript
-// 引入基础样式
-import 'vant/packages/vant-css/src/base.css';
-
-// 引入组价对应的样式
-import 'vant/packages/vant-css/src/button.css';
-import 'vant/packages/vant-css/src/checkbox.css';
-```
-
-接着在 postcss.config.js 中引入所需的 postcss 插件，并根据项目需求配置颜色变量，所有可用的颜色变量请参考 [配置文件](https://github.com/youzan/vant/blob/dev/packages/vant-css/src/common/var.css)
-
-```javascript
-module.exports = {
-  plugins: [
-    require('postcss-easy-import')({
-      extensions: ['pcss', 'css']
-    }),
-    require('postcss-theme-variables')({
-      vars: {
-        red: '#F60',
-        gray: '#CCC',
-        blue: '#03A9F4'
-      },
-      prefix: '$'
-    }),
-    require('precss')(),
-    require('postcss-calc')(),
-    require('autoprefixer')({
-      browsers: ['Android >= 4.0', 'iOS >= 7']
-    })
-  ]
-};
-```
-
-### 方案二. 本地构建
-可以通过在本地构建 vant-css 的方式生成所需的主题
-
-```bash
-# 克隆仓库
-git clone git@github.com:youzan/vant.git
-cd packages/vant-css
-```
-
-在本地 vant-css 仓库中，修改 src/common/var.css 中的颜色变量，然后执行以下构建命令，即可生成对应的样式文件
-```bash
-npm run build
-```
-
diff --git a/packages/area/index.vue b/packages/area/index.vue
index a58731af3..a6fda18eb 100644
--- a/packages/area/index.vue
+++ b/packages/area/index.vue
@@ -1,6 +1,14 @@
 <template>
   <div class="van-area">
-    <van-picker ref="picker" :columns="areaColumns" value-key="name" show-toolbar @change="handleAreaChange" @confirm="handleAreaConfirm" @cancel="handleAreaCancel"></van-picker>
+    <van-picker
+      ref="picker"
+      showToolbar
+      valueKey="name"
+      :columns="areaColumns"
+      @change="onChange"
+      @confirm="$emit('confirm', $event)"
+      @cancel="$emit('cancel')"
+    />
   </div>
 </template>
 
@@ -80,12 +88,7 @@ export default {
   },
 
   methods: {
-    /**
-     * 根据省市县类型和对应的`code`获取对应列表
-     *
-     * @param {string} type 省市县类型
-     * @param {string} code 对应code
-     */
+    // 根据省市县类型和对应的`code`获取对应列表
     computedAreaList(type, code) {
       const result = [];
       const curAreaList = this.areaList;
@@ -107,9 +110,7 @@ export default {
       return result;
     },
 
-    /**
-     * 获取对应省市县在列表中的索引
-     */
+    // 获取对应省市县在列表中的索引
     getAreaIndex(type, code) {
       const compareNum = type === PROVINCE_TYPE
         ? 2
@@ -125,7 +126,7 @@ export default {
       return 0;
     },
 
-    handleAreaChange(picker, values, index) {
+    onChange(picker, values, index) {
       const code = values[index].code;
       // 处理省变化
       if (index === 0) {
@@ -143,14 +144,6 @@ export default {
           [DEFAULT_COUNTY].concat(this.computedAreaList(COUNTY_TYPE, code.slice(0, 4)))
         );
       }
-    },
-
-    handleAreaConfirm(values) {
-      this.$emit('confirm', values);
-    },
-
-    handleAreaCancel() {
-      this.$emit('cancel');
     }
   }
 };
diff --git a/packages/badge/index.vue b/packages/badge/index.vue
index 801b19e30..57ec9f34e 100644
--- a/packages/badge/index.vue
+++ b/packages/badge/index.vue
@@ -10,17 +10,9 @@ export default {
   name: 'van-badge',
 
   props: {
-    title: {
-      type: String,
-      required: true
-    },
-    url: {
-      type: String,
-      default: 'javascript:;'
-    },
-    info: {
-      type: String
-    }
+    url: String,
+    info: String,
+    title: String
   },
 
   beforeCreate() {
@@ -29,8 +21,7 @@ export default {
 
   computed: {
     isSelect() {
-      const parent = this.$parent;
-      return parent.badges.indexOf(this) === parent.activeKey;
+      return this.$parent.badges.indexOf(this) === this.$parent.activeKey;
     }
   },
 
diff --git a/packages/button/index.js b/packages/button/index.js
index 1961b6e9f..b4a352297 100644
--- a/packages/button/index.js
+++ b/packages/button/index.js
@@ -1,8 +1,5 @@
 import Loading from '../loading';
 
-const ALLOWED_SIZE = ['mini', 'small', 'normal', 'large'];
-const ALLOWED_TYPE = ['default', 'danger', 'primary'];
-
 export default {
   name: 'van-button',
 
@@ -22,13 +19,11 @@ export default {
     },
     type: {
       type: String,
-      default: 'default',
-      validator: value => ALLOWED_TYPE.indexOf(value) > -1
+      default: 'default'
     },
     size: {
       type: String,
-      default: 'normal',
-      validator: value => ALLOWED_SIZE.indexOf(value) > -1
+      default: 'normal'
     }
   },
 
diff --git a/packages/card/index.vue b/packages/card/index.vue
index b672be415..a89278613 100644
--- a/packages/card/index.vue
+++ b/packages/card/index.vue
@@ -34,8 +34,8 @@ export default {
     thumb: String,
     title: String,
     desc: String,
-    num: [Number, String],
     centered: Boolean,
+    num: [Number, String],
     price: [Number, String]
   }
 };
diff --git a/packages/cell-swipe/index.vue b/packages/cell-swipe/index.vue
index 3555c55f6..be6f14fb5 100644
--- a/packages/cell-swipe/index.vue
+++ b/packages/cell-swipe/index.vue
@@ -82,8 +82,8 @@ export default {
     },
 
     startDrag(event) {
-      this.startX = event.changedTouches[0].pageX;
-      this.startY = event.changedTouches[0].pageY;
+      this.startX = event.touches[0].pageX;
+      this.startY = event.touches[0].pageY;
     },
 
     onDrag(event) {
@@ -93,8 +93,8 @@ export default {
         return;
       }
 
-      const offsetTop = event.changedTouches[0].pageY - this.startY;
-      const offsetLeft = event.changedTouches[0].pageX - this.startX;
+      const offsetTop = event.touches[0].pageY - this.startY;
+      const offsetLeft = event.touches[0].pageX - this.startX;
       if ((offsetLeft < 0 && -offsetLeft > this.rightWidth) ||
         (offsetLeft > 0 && offsetLeft > this.leftWidth) ||
         (offsetLeft > 0 && !this.leftWidth) ||
diff --git a/packages/checkbox/index.vue b/packages/checkbox/index.vue
index afa02367d..a0349490a 100644
--- a/packages/checkbox/index.vue
+++ b/packages/checkbox/index.vue
@@ -101,10 +101,9 @@ export default {
 
   methods: {
     onClickLabel() {
-      if (this.isDisabled) {
-        return;
+      if (!this.isDisabled) {
+        this.currentValue = !this.currentValue;
       }
-      this.currentValue = !this.currentValue;
     }
   }
 };
diff --git a/packages/col/index.vue b/packages/col/index.vue
index 4f1ed8cfe..ca7360dc3 100644
--- a/packages/col/index.vue
+++ b/packages/col/index.vue
@@ -1,13 +1,11 @@
 <template>
   <div
-    :class="[
-      `${prefix}-col`,
-      {
-        [`${prefix}-col-${span}`]: span,
-        [`${prefix}-col-offset-${offset}`]: offset,
-      }
-    ]"
-    :style="style">
+    :class="[`van-col`, { 
+      [`van-col-${span}`]: span,
+      [`van-col-offset-${offset}`]: offset,
+    }]"
+    :style="style"
+  >
       <slot></slot>
   </div>
 </template>
@@ -18,11 +16,7 @@ export default {
 
   props: {
     span: [Number, String],
-    offset: [Number, String],
-    prefix: {
-      type: String,
-      default: 'van'
-    }
+    offset: [Number, String]
   },
 
   computed: {
@@ -31,9 +25,7 @@ export default {
     },
     style() {
       const padding = `${this.gutter / 2}px`;
-      return this.gutter
-        ? { paddingLeft: padding, paddingRight: padding }
-        : {};
+      return this.gutter ? { paddingLeft: padding, paddingRight: padding } : {};
     }
   }
 };
diff --git a/packages/contact-card/index.vue b/packages/contact-card/index.vue
index aaa4bf573..e8cfdda8e 100644
--- a/packages/contact-card/index.vue
+++ b/packages/contact-card/index.vue
@@ -31,16 +31,12 @@ export default {
   },
 
   props: {
+    tel: String,
+    name: String,
     addText: String,
     type: {
       type: String,
       default: 'add'
-    },
-    name: {
-      type: String
-    },
-    tel: {
-      type: String
     }
   }
 };
diff --git a/packages/datetime-picker/index.vue b/packages/datetime-picker/index.vue
index b0fc50386..18887f69e 100644
--- a/packages/datetime-picker/index.vue
+++ b/packages/datetime-picker/index.vue
@@ -13,8 +13,6 @@
 <script>
 import Picker from '../picker';
 
-const allowedType = ['time', 'date', 'datetime'];
-
 export default {
   name: 'van-datetime-picker',
 
@@ -25,10 +23,7 @@ export default {
   props: {
     type: {
       type: String,
-      default: 'datetime',
-      validator(value) {
-        return allowedType.indexOf(value) > -1;
-      }
+      default: 'datetime'
     },
     format: {
       type: String,
@@ -58,7 +53,7 @@ export default {
       type: Number,
       default: 23
     },
-    value: null
+    value: {}
   },
 
   data() {
diff --git a/packages/dialog/dialog.vue b/packages/dialog/dialog.vue
index 9c85b75ee..2900f702a 100644
--- a/packages/dialog/dialog.vue
+++ b/packages/dialog/dialog.vue
@@ -44,16 +44,11 @@ export default {
   mixins: [Popup, i18n],
 
   props: {
+    title: String,
+    message: String,
+    callback: Function,
     confirmButtonText: String,
     cancelButtonText: String,
-    title: {
-      type: String,
-      default: ''
-    },
-    message: {
-      type: String,
-      default: ''
-    },
     showConfirmButton: {
       type: Boolean,
       default: true
@@ -62,9 +57,6 @@ export default {
       type: Boolean,
       default: false
     },
-    callback: {
-      type: Function
-    },
     overlay: {
       default: true
     },
diff --git a/packages/field/index.vue b/packages/field/index.vue
index 2f59b923d..f48d672b1 100644
--- a/packages/field/index.vue
+++ b/packages/field/index.vue
@@ -49,8 +49,6 @@
 import Cell from '../cell';
 import Icon from '../icon';
 
-const VALID_TYPES = ['text', 'number', 'email', 'url', 'tel', 'date', 'time', 'datetime', 'password', 'textarea'];
-
 export default {
   name: 'van-field',
 
@@ -62,15 +60,14 @@ export default {
   props: {
     type: {
       type: String,
-      default: 'text',
-      validator: value => VALID_TYPES.indexOf(value) > -1
+      default: 'text'
     },
     value: {},
     icon: String,
     label: String,
     error: Boolean,
-    required: Boolean,
     border: Boolean,
+    required: Boolean,
     autosize: Boolean,
     onIconClick: {
       type: Function,
diff --git a/packages/goods-action-big-btn/index.vue b/packages/goods-action-big-btn/index.vue
index 58bf06b07..86ceb7373 100644
--- a/packages/goods-action-big-btn/index.vue
+++ b/packages/goods-action-big-btn/index.vue
@@ -22,11 +22,8 @@ export default {
   },
 
   props: {
-    primary: Boolean,
-    url: {
-      type: String,
-      default: 'javascript:;'
-    }
+    url: String,
+    primary: Boolean
   }
 };
 </script>
diff --git a/packages/goods-action-mini-btn/index.vue b/packages/goods-action-mini-btn/index.vue
index bc7ed9b0c..f48d1a46a 100644
--- a/packages/goods-action-mini-btn/index.vue
+++ b/packages/goods-action-mini-btn/index.vue
@@ -16,15 +16,9 @@ export default {
   },
 
   props: {
+    url: String,
     icon: String,
-    iconClass: {
-      type: String,
-      default: ''
-    },
-    url: {
-      type: String,
-      default: 'javascript:;'
-    }
+    iconClass: String
   }
 };
 </script>
diff --git a/packages/icon/index.vue b/packages/icon/index.vue
index 7e3b89521..0fe1b857f 100644
--- a/packages/icon/index.vue
+++ b/packages/icon/index.vue
@@ -7,12 +7,8 @@
 <script>
 export default {
   name: 'van-icon',
-
   props: {
-    name: {
-      type: String,
-      required: true
-    }
+    name: String
   }
 };
 </script>
diff --git a/packages/image-preview/image-preview.vue b/packages/image-preview/image-preview.vue
index 46434e058..84ecdb22e 100644
--- a/packages/image-preview/image-preview.vue
+++ b/packages/image-preview/image-preview.vue
@@ -34,9 +34,6 @@ export default {
     overlay: {
       default: true
     },
-    lockOnScroll: {
-      default: true
-    },
     closeOnClickOverlay: {
       default: true
     }
diff --git a/packages/loading/index.vue b/packages/loading/index.vue
index b263948f6..ea1857cbf 100644
--- a/packages/loading/index.vue
+++ b/packages/loading/index.vue
@@ -1,28 +1,23 @@
 <template>
   <div :class="['van-loading', 'van-loading--' + type, 'van-loading--' + color]">
     <span :class="['van-loading__spinner', 'van-loading__spinner--' + type, 'van-loading__spinner--' + color]">
-      <i v-if="type === 'spinner'" v-for="item in 12"></i>
+      <i v-if="type === 'spinner'" v-for="item in 12" />
     </span>
   </div>
 </template>
 
 <script>
-const VALID_TYPES = ['gradient-circle', 'circle', 'spinner'];
-const VALID_COLORS = ['black', 'white'];
-
 export default {
   name: 'van-loading',
 
   props: {
     type: {
       type: String,
-      default: 'gradient-circle',
-      validator: value => VALID_TYPES.indexOf(value) > -1
+      default: 'gradient-circle'
     },
     color: {
       type: String,
-      default: 'black',
-      validator: value => VALID_COLORS.indexOf(value) > -1
+      default: 'black'
     }
   }
 };
diff --git a/packages/notice-bar/index.vue b/packages/notice-bar/index.vue
index db709a718..e9c3199b7 100644
--- a/packages/notice-bar/index.vue
+++ b/packages/notice-bar/index.vue
@@ -25,8 +25,6 @@
 <script>
 import Icon from '../icon';
 
-const NOTICE_BAR_MODE = ['', 'closeable', 'link'];
-
 export default {
   name: 'van-notice-bar',
 
@@ -36,14 +34,10 @@ export default {
 
   props: {
     text: String,
-    leftIcon: String,
+    mode: String,
     color: String,
+    leftIcon: String,
     background: String,
-    mode: {
-      type: String,
-      default: '',
-      validator: val => NOTICE_BAR_MODE.indexOf(val) !== -1
-    },
     delay: {
       type: [String, Number],
       default: 1
diff --git a/packages/panel/index.vue b/packages/panel/index.vue
index 4ccdabd8e..08977da36 100644
--- a/packages/panel/index.vue
+++ b/packages/panel/index.vue
@@ -2,9 +2,9 @@
   <div class="van-panel van-hairline--top-bottom">
     <div class="van-panel__header van-hairline--bottom">
       <slot name="header">
-        <div class="van-panel__title" v-text="title"></div>
-        <span class="van-panel__desc" v-if="desc" v-text="desc"></span>
-        <span class="van-panel__status" v-if="status" v-text="status"></span>
+        <div class="van-panel__title" v-text="title" />
+        <span class="van-panel__desc" v-if="desc" v-text="desc" />
+        <span class="van-panel__status" v-if="status" v-text="status" />
       </slot>
     </div>
     <div class="van-panel__content">
diff --git a/packages/radio/index.vue b/packages/radio/index.vue
index 3e0fa987b..764605c83 100644
--- a/packages/radio/index.vue
+++ b/packages/radio/index.vue
@@ -33,8 +33,8 @@ export default {
   mixins: [findParent],
 
   props: {
-    disabled: Boolean,
     value: {},
+    disabled: Boolean,
     name: [String, Number]
   },
 
diff --git a/packages/row/index.vue b/packages/row/index.vue
index 0e4a6ae69..747bf6016 100644
--- a/packages/row/index.vue
+++ b/packages/row/index.vue
@@ -1,5 +1,5 @@
 <template>
-  <div :class="`${prefix}-row`" :style="style">
+  <div class="van-row" :style="style">
     <slot></slot>
   </div>
 </template>
@@ -9,10 +9,6 @@ export default {
   name: 'van-row',
 
   props: {
-    prefix: {
-      type: String,
-      default: 'van'
-    },
     gutter: {
       type: [Number, String],
       default: 0
diff --git a/packages/search/index.vue b/packages/search/index.vue
index 0c11b0ae9..0c9e93844 100644
--- a/packages/search/index.vue
+++ b/packages/search/index.vue
@@ -41,11 +41,8 @@ export default {
 
   props: {
     value: String,
+    showAction: Boolean,
     placeholder: String,
-    showAction: {
-      type: Boolean,
-      default: false
-    },
     background: {
       type: String,
       default: '#f2f2f2'
diff --git a/packages/sku/containers/SkuContainer.vue b/packages/sku/containers/SkuContainer.vue
index d45e1693e..550403062 100644
--- a/packages/sku/containers/SkuContainer.vue
+++ b/packages/sku/containers/SkuContainer.vue
@@ -116,10 +116,7 @@ export default {
       type: Number,
       default: 0
     },
-    hideStock: {
-      type: Boolean,
-      default: false
-    },
+    hideStock: Boolean,
     showAddCartBtn: {
       type: Boolean,
       default: true
diff --git a/packages/step/index.vue b/packages/step/index.vue
index 62762dca1..3e1577d18 100644
--- a/packages/step/index.vue
+++ b/packages/step/index.vue
@@ -1,13 +1,13 @@
 <template>
-  <div class="van-step van-hairline" :class="stepClass">
+  <div class="van-step van-hairline" :class="[`van-step--${$parent.direction}`, { [`van-step--${status}`]: status }]">
     <div class="van-step__circle-container">
-      <i class="van-step__circle" v-if="status !== 'process'"></i>
-      <i class="van-icon van-icon-checked" :style="{ color: $parent.activeColor }" v-else></i>
+      <i class="van-step__circle" v-if="status !== 'process'" />
+      <i class="van-icon van-icon-checked" :style="{ color: $parent.activeColor }" v-else />
     </div>
     <div class="van-step__title" :style="titleStyle">
       <slot></slot>
     </div>
-    <div class="van-step__line"></div>
+    <div class="van-step__line" />
   </div>
 </template>
 
@@ -30,18 +30,11 @@ export default {
         return 'process';
       }
     },
-    stepClass() {
-      const status = this.status;
-      const statusClass = status ? 'van-step--' + status : '';
-      const directionClass = `van-step--${this.$parent.direction}`;
-      return [directionClass, statusClass];
-    },
+
     titleStyle() {
-      if (this.status === 'process') {
-        return {
-          color: this.$parent.activeColor
-        };
-      }
+      return this.status === 'process' ? {
+        color: this.$parent.activeColor
+      } : {};
     }
   }
 };
diff --git a/packages/steps/index.vue b/packages/steps/index.vue
index 9c01f7e84..5f8668190 100644
--- a/packages/steps/index.vue
+++ b/packages/steps/index.vue
@@ -3,21 +3,18 @@
     <div class="van-steps__status" v-if="title || description">
       <div class="van-steps__icon" v-if="icon || $slots.icon">
         <slot name="icon">
-          <van-icon :name="icon" :class="iconClass"></van-icon>
+          <van-icon :name="icon" :class="iconClass" />
         </slot>
       </div>
       <div class="van-steps__message">
         <div class="van-steps__message-wrapper">
-          <div class="van-steps__title" v-text="title"></div>
-          <div class="van-steps__desc" v-text="description"></div>
+          <div class="van-steps__title" v-text="title" />
+          <div class="van-steps__desc" v-text="description" />
         </div>
       </div>
-      <slot name="message-extra">
-      </slot>
+      <slot name="message-extra" />
     </div>
-    <div class="van-steps__items" :class="{
-        'van-steps__items--alone': !title && !description
-      }">
+    <div class="van-steps__items" :class="{ 'van-steps__items--alone': !title && !description }">
       <slot></slot>
     </div>
   </div>
@@ -34,13 +31,10 @@ export default {
   },
 
   props: {
-    active: Number,
     icon: String,
-    iconClass: {
-      type: String,
-      default: ''
-    },
     title: String,
+    active: Number,
+    iconClass: String,
     description: String,
     direction: {
       type: String,
diff --git a/packages/submit-bar/index.vue b/packages/submit-bar/index.vue
index f236cbfd1..670390fb8 100644
--- a/packages/submit-bar/index.vue
+++ b/packages/submit-bar/index.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="van-submit-bar">
     <div class="van-submit-bar__tip" v-show="tip || $slots.tip">
-      {{ tip }}<slot name="tip"></slot>
+      {{ tip }}<slot name="tip" />
     </div>
     <div class="van-submit-bar__bar">
       <div class="van-submit-bar__price">
diff --git a/packages/swipe/index.vue b/packages/swipe/index.vue
index 760887a86..f1da7718f 100644
--- a/packages/swipe/index.vue
+++ b/packages/swipe/index.vue
@@ -12,10 +12,7 @@
     >
       <slot></slot>
     </div>
-    <div 
-      v-else
-      class="van-swipe__track"
-    >
+    <div v-else class="van-swipe__track">
       <slot></slot>
     </div>
     <div class="van-swipe__indicators" v-if="showIndicators && count > 1">
diff --git a/packages/switch-cell/index.vue b/packages/switch-cell/index.vue
index 911d33da5..52bb2514b 100644
--- a/packages/switch-cell/index.vue
+++ b/packages/switch-cell/index.vue
@@ -1,6 +1,6 @@
 <template>
   <van-cell :title="title" class="van-switch-cell">
-    <van-switch :value="value" @input="$emit('input', $event)" :disabled="disabled" :loading="loading" />
+    <van-switch v-bind="$props" @input="$emit('input', $event)" />
   </van-cell>
 </template>
 
diff --git a/packages/switch/index.vue b/packages/switch/index.vue
index 378dd9228..d007f6299 100644
--- a/packages/switch/index.vue
+++ b/packages/switch/index.vue
@@ -3,7 +3,7 @@
     <div class="van-switch__node van-hairline-surround">
       <van-loading v-if="loading" class="van-switch__loading" />
     </div>
-    <div class="van-switch__bg"></div>
+    <div class="van-switch__bg" />
   </div>
 </template>
 
diff --git a/packages/tag/index.vue b/packages/tag/index.vue
index 4fcdc1fa1..6f35a890f 100644
--- a/packages/tag/index.vue
+++ b/packages/tag/index.vue
@@ -1,19 +1,14 @@
 <template>
-  <span :class="['van-tag', 'van-hairline--surround', { [`van-tag--${type}`]: type, 'is-plain': plain, 'is-mark': mark }]">
+  <span :class="['van-tag', 'van-hairline--surround', { [`van-tag--${type}`]: type, 'van-tag--plain': plain, 'van-tag--mark': mark }]">
     <slot></slot>
   </span>
 </template>
 
 <script>
-const ALLOW_TYPE = ['danger', 'success', 'primary'];
-
 export default {
   name: 'van-tag',
   props: {
-    type: {
-      type: String,
-      validator: val => ~ALLOW_TYPE.indexOf(val)
-    },
+    type: String,
     mark: Boolean,
     plain: Boolean
   }
diff --git a/packages/toast/index.js b/packages/toast/index.js
index 8dff1d60b..9117458e1 100644
--- a/packages/toast/index.js
+++ b/packages/toast/index.js
@@ -6,9 +6,9 @@ let instance;
 const defaultOptions = {
   visible: true,
   type: 'text',
+  mask: false,
   position: 'middle',
   duration: 3000,
-  mask: false,
   forbidClick: false,
   clear: () => {
     instance.visible = false;
diff --git a/packages/toast/toast.vue b/packages/toast/toast.vue
index 6ba795c96..a1762a8a4 100644
--- a/packages/toast/toast.vue
+++ b/packages/toast/toast.vue
@@ -22,7 +22,6 @@
 import Icon from '../icon';
 import Loading from '../loading';
 
-const TOAST_TYPES = ['text', 'html', 'loading', 'success', 'fail'];
 const DEFAULT_STYLE_LIST = ['success', 'fail', 'loading'];
 
 export default {
@@ -34,26 +33,16 @@ export default {
   },
 
   props: {
+    mask: Boolean,
+    message: String,
+    forbidClick: Boolean,
     type: {
       type: String,
-      default: 'text',
-      validator: value => TOAST_TYPES.indexOf(value) > -1
-    },
-    message: {
-      type: String,
-      default: ''
-    },
-    forbidClick: {
-      type: Boolean,
-      default: false
+      default: 'text'
     },
     position: {
       type: String,
       default: 'middle'
-    },
-    mask: {
-      type: Boolean,
-      default: false
     }
   },
 
diff --git a/packages/uploader/index.vue b/packages/uploader/index.vue
index 8e7e0cc42..32cbbe594 100644
--- a/packages/uploader/index.vue
+++ b/packages/uploader/index.vue
@@ -10,16 +10,12 @@ export default {
   name: 'van-uploader',
 
   props: {
-    disabled: {
-      type: Boolean,
-      default: false
-    },
+    disabled: Boolean,
     beforeRead: Function,
     afterRead: Function,
     resultType: {
       type: String,
-      default: 'dataUrl',
-      validator: value => value === 'dataUrl' || value === 'text'
+      default: 'dataUrl'
     }
   },
 
diff --git a/packages/vant-css/src/tag.css b/packages/vant-css/src/tag.css
index 0973c087e..7152d432e 100644
--- a/packages/vant-css/src/tag.css
+++ b/packages/vant-css/src/tag.css
@@ -10,16 +10,11 @@
   color: $white;
 
   &::after {
-    border-color: $gray;
+    border-color: currentColor;
     border-radius: 4px;
   }
 
-  &.is-plain {
-    background: $white;
-    color: $gray;
-  }
-
-  &.is-mark {
+  &--mark {
     border-radius: 0 8px 8px 0;
 
     &::after {
@@ -30,11 +25,7 @@
   &--success {
     background: $green;
 
-    &::after {
-      border-color: $green;
-    }
-
-    &.is-plain {
+    &.van-tag--plain {
       color: $green;
     }
   }
@@ -42,11 +33,7 @@
   &--danger {
     background: $button-danger-background-color;
 
-    &::after {
-      border-color: $button-danger-background-color;
-    }
-
-    &.is-plain {
+    &.van-tag--plain {
       color: $button-danger-background-color;
     }
   }
@@ -54,12 +41,13 @@
   &--primary {
     background: $blue;
 
-    &::after {
-      border-color: $blue;
-    }
-
-    &.is-plain {
+    &.van-tag--plain {
       color: $blue;
     }
   }
+
+  &--plain {
+    background: $white;
+    color: $gray;
+  }
 }
diff --git a/test/unit/specs/deep-assign.spec.js b/test/unit/specs/deep-assign.spec.js
index d6b15edab..3eff8102b 100644
--- a/test/unit/specs/deep-assign.spec.js
+++ b/test/unit/specs/deep-assign.spec.js
@@ -1,6 +1,6 @@
 import deepAssign from 'packages/utils/deep-assign';
 
-describe('DatetimePicker', () => {
+describe('DeepAssign', () => {
   it('basic assign', () => {
     const a = { foo: 0 };
     const b = { foo: 0, bar: 1 };
diff --git a/yarn.lock b/yarn.lock
index a784a9a5a..c64c300fa 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7755,9 +7755,9 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "~1.0.0"
     spdx-expression-parse "~1.0.0"
 
-vant-doc@0.3.17:
-  version "0.3.17"
-  resolved "https://registry.yarnpkg.com/vant-doc/-/vant-doc-0.3.17.tgz#4c3bd5e4a4299926ad3638dc1c1bd28bbb5ac34b"
+vant-doc@0.3.18:
+  version "0.3.18"
+  resolved "https://registry.yarnpkg.com/vant-doc/-/vant-doc-0.3.18.tgz#86f94b931767bd1ba3e2c48015446be1729e0976"
   dependencies:
     cheerio "0.22.0"
     decamelize "^1.2.0"