docs(Switch): added slot module content (#3963)

Author: anlyyao

packages/components/switch/README.en-US.md

@@ -23,6 +23,15 @@ name | params | description
 -- | -- | --
 change | `(value: SwitchValue)` | \-
 
+### Switch External Classes
+
+className | Description
+-- | --
+t-class | \-
+t-class-body | \-
+t-class-dot | \-
+t-class-label | \-
+
 ### CSS Variables
 
 The component provides the following CSS variables, which can be used to customize styles.

packages/components/switch/README.md

@@ -67,6 +67,15 @@ default-value | String / Number / Boolean | undefined | 开关值。非受控属
 -- | -- | --
 change | `(value: SwitchValue)` | 数据发生变化时触发
 
+### Switch External Classes
+
+类名 | 描述
+-- | --
+t-class | 根节点样式类
+t-class-body | 描述文本样式类
+t-class-dot | 滑块样式类
+t-class-label | 开关内容样式类
+
 ### CSS Variables
 
 组件提供了下列 CSS 变量，可用于自定义样式。

packages/components/switch/switch.ts

@@ -6,7 +6,7 @@ const { prefix } = config;
 const name = `${prefix}-switch`;
 @wxComponent()
 export default class Switch extends SuperComponent {
-  externalClasses = ['t-class', 't-class-label', 't-class-body', 't-class-dot'];
+  externalClasses = [`${prefix}-class`, `${prefix}-class-label`, `${prefix}-class-body`, `${prefix}-class-dot`];
 
   behaviors = ['wx://form-field'];