feat: add getTitleValue api #536

docs/guide/command-get.md

@@ -209,7 +209,8 @@ const groupIds = await instance.command.getGroupIds()
 const {
   value: string | null
   innerText: string | null
-} = await instance.command.getControlValue(payload: IGetControlValueOption)
+  zone: EditorZone
+}[] = await instance.command.getControlValue(payload: IGetControlValueOption)
 ```
 
 ## getControlList
@@ -231,3 +232,17 @@ const controlList = await instance.command.getControlList()
 ```javascript
 const container = await instance.command.getContainer()
 ```
+
+## getTitleValue
+
+功能：获取标题值
+
+用法：
+
+```javascript
+const {
+  value: string | null
+  elementList: IElement[]
+  zone: EditorZone
+}[] = await instance.command.getTitleValue(payload: IGetTitleValueOption)
+```

docs/guide/schema.md

@@ -164,6 +164,7 @@ interface IElement {
   };
   // 标题
   level?: TitleLevel;
+  title?: ITitle;
   // 列表
   listType?: ListType;
   listStyle?: ListStyle;