[Improvement] Reorganize document (#1066)

packages/stepper/en-US.md

@@ -0,0 +1,66 @@
+## Stepper
+
+### Install
+``` javascript
+import { Stepper } from 'vant';
+
+Vue.use(Stepper);
+```
+
+### Usage
+
+#### Basic Usage
+
+```html
+<van-stepper v-model="value" />
+```
+
+```javascript
+export default {
+  data() {
+    return {
+      value: 1
+    }
+  }
+}
+```
+
+#### Disabled
+
+```html
+<van-stepper v-model="value" disabled />
+```
+
+#### Advanced Usage
+
+```html
+<van-stepper
+  v-model="value"
+  integer
+  :min="5"
+  :max="40"
+  :step="2"
+  :default-value="9"
+/>
+```
+
+### API
+
+| Attribute | Description | Type | Default |
+|-----------|-----------|-----------|-------------|
+| min | Min value | `String | Number` | `1` |
+| max | Max value | `String | Number` | - |
+| default-value | Default value | `String | Number` | `1` |
+| step | Value change step | `String | Number` | `1` |
+| integer | Whether to allow only integers | `Boolean` | `false` |
+| disabled | Disable value change | `Boolean` | `false` |
+| disable-input | Disable input | `Boolean` | `false` |
+
+### Event
+
+| Event | Description | Arguments |
+|-----------|-----------|-----------|
+| change | Triggered when value change | value: current value |
+| overlimit | Triggered when click disabled button | - |
+| plus | Triggered when click plus button | - |
+| minus | Triggered when click minus button | - |

packages/stepper/zh-CN.md

@@ -0,0 +1,69 @@
+## Stepper 步进器
+
+### 使用指南
+``` javascript
+import { Stepper } from 'vant';
+
+Vue.use(Stepper);
+```
+
+### 代码演示
+
+#### 基础用法
+
+```html
+<van-stepper v-model="value" />
+```
+
+```javascript
+export default {
+  data() {
+    return {
+      value: 1
+    }
+  }
+}
+```
+
+#### 禁用状态
+通过设置`disabled`属性来禁用 stepper
+
+```html
+<van-stepper v-model="value" disabled />
+```
+
+#### 高级用法
+
+默认是每次加减为1，可以对组件设置`step`、`min`、`max`、`default-value`属性
+
+```html
+<van-stepper
+  v-model="value"
+  integer
+  :min="5"
+  :max="40"
+  :step="2"
+  :default-value="9"
+/>
+```
+
+### API
+
+| 参数 | 说明 | 类型 | 默认值 |
+|-----------|-----------|-----------|-------------|
+| min | 最小值 | `String | Number` | `1` |
+| max | 最大值 | `String | Number` | - |
+| default-value | 默认值 | `String | Number` | `1` |
+| step | 步数 | `String | Number` | `1` |
+| integer | 是否只允许输入整数 | `Boolean` | `false` |
+| disabled | 是否禁用 | `Boolean` | `false` |
+| disable-input | 是否禁用input框 | `Boolean` | `false` |
+
+### Event
+
+| 事件名称 | 说明 | 回调参数 |
+|-----------|-----------|-----------|
+| change | 当绑定值变化时触发的事件 | 当前组件的值 |
+| overlimit | 点击不可用的按钮时触发 | - |
+| plus | 点击增加按钮时触发 | - |
+| minus | 点击减少按钮时触发 | - |