modify object arkts

Signed-off-by: NLiRui <lirui.WX1229126@huawei.com>

zh-cn/application-dev/database/data-persistence-by-preferences.md

@@ -47,7 +47,7 @@
 
 1. 导入`@ohos.data.preferences`模块。
      
-   ```js
+   ```ts
    import dataPreferences from '@ohos.data.preferences';
    ```
 
@@ -56,7 +56,7 @@
    Stage模型示例：
 
      
-   ```js
+   ```ts
    import UIAbility from '@ohos.app.ability.UIAbility';
    import { BusinessError } from '@ohos.base';
    import window from '@ohos.window';
@@ -73,7 +73,9 @@
            // 请确保获取到Preferences实例后，再进行相关数据操作
          })
        } catch (err) {
-         console.error(`Failed to get preferences. Code:${err.code},message:${err.message}`);
+         let code = (err as BusinessError).code;
+         let message = (err as BusinessError).message;
+         console.error(`Failed to get preferences. Code:${code},message:${message}`);
        }
      }
    }
@@ -82,7 +84,7 @@
    FA模型示例：
 
      
-   ```js
+   ```ts
    import featureAbility from '@ohos.ability.featureAbility';
    import { BusinessError } from '@ohos.base';
    
@@ -99,7 +101,9 @@
        // 请确保获取到Preferences实例后，再进行相关数据操作
      })
    } catch (err) {
-     console.error(`Failed to get preferences. Code is ${err.code},message:${err.message}`);
+     let code = (err as BusinessError).code;
+     let message = (err as BusinessError).message;
+     console.error(`Failed to get preferences. Code is ${code},message:${message}`);
    }
    ```
 
@@ -114,7 +118,7 @@
    示例代码如下所示：
 
      
-   ```js
+   ```ts
    try {
      if (preferences.hasSync('startup')) {
        console.info("The key 'startup' is contained.");
@@ -124,7 +128,9 @@
        preferences.putSync('startup', 'auto');
      }
    } catch (err) {
-     console.error(`Failed to check the key 'startup'. Code:${err.code}, message:${err.message}`);
+     let code = (err as BusinessError).code;
+     let message = (err as BusinessError).message;
+     console.error(`Failed to check the key 'startup'. Code:${code}, message:${message}`);
    }
    ```
 
@@ -132,12 +138,14 @@
 
      使用getSync()方法获取数据，即指定键对应的值。如果值为null或者非默认值类型，则返回默认数据。示例代码如下所示：
      
-   ```js
+   ```ts
    try {
      let val = preferences.getSync('startup', 'default');
      console.info(`Succeeded in getting value of 'startup'. val: ${val}.`);
    } catch (err) {
-     console.error(`Failed to get value of 'startup'. Code:${err.code}, message:${err.message}`);
+     let code = (err as BusinessError).code;
+     let message = (err as BusinessError).message;
+     console.error(`Failed to get value of 'startup'. Code:${code}, message:${message}`);
    }
    ```
 
@@ -146,11 +154,13 @@
    使用deleteSync()方法删除指定键值对，示例代码如下所示：
 
      
-   ```js
+   ```ts
    try {
      preferences.deleteSync('startup');
    } catch (err) {
-     console.error(`Failed to delete the key 'startup'. Code:${err.code}, message:${err.message}`);
+     let code = (err as BusinessError).code;
+     let message = (err as BusinessError).message;
+     console.error(`Failed to delete the key 'startup'. Code:${code}, message:${message}`);
    }
    ```
 
@@ -158,7 +168,7 @@
 
      应用存入数据到Preferences实例后，可以使用flush()方法实现数据持久化。示例代码如下所示：
      
-   ```js
+   ```ts
    try {
      preferences.flush((err: BusinessError) => {
        if (err) {
@@ -168,7 +178,9 @@
        console.info('Succeeded in flushing.');
      })
    } catch (err) {
-     console.error(`Failed to flush. Code:${err.code}, message:${err.message}`);
+     let code = (err as BusinessError).code;
+     let message = (err as BusinessError).message;
+     console.error(`Failed to flush. Code:${code}, message:${message}`);
    }
    ```
 
@@ -176,7 +188,7 @@
 
      应用订阅数据变更需要指定observer作为回调方法。订阅的Key值发生变更后，当执行flush()方法时，observer被触发回调。示例代码如下所示：
      
-   ```js
+   ```ts
    interface observer {
       key: string
    }
@@ -213,7 +225,7 @@
    示例代码如下所示：
 
      
-   ```js
+   ```ts
    try {
      dataPreferences.deletePreferences(this.context, 'myStore', (err: BusinessError) => {
        if (err) {
@@ -223,7 +235,9 @@
        console.info('Succeeded in deleting preferences.');
      })
    } catch (err) {
-     console.error(`Failed to delete preferences. Code:${err.code}, message:${err.message}`);
+     let code = (err as BusinessError).code;
+     let message = (err as BusinessError).message;
+     console.error(`Failed to delete preferences. Code:${code}, message:${message}`);
    }
    ```
 

zh-cn/application-dev/database/data-sync-of-distributed-data-object.md

@@ -115,6 +115,7 @@
 ## 接口说明
 
 以下是分布式对象跨设备数据同步功能的相关接口，大部分为异步接口。异步接口均有callback和Promise两种返回形式，下表均以callback形式为例，更多接口及使用方式请见[分布式数据对象](../reference/apis/js-apis-data-distributedobject.md)。
+本模块接口仅支持在JS文件中使用。
 
 | 接口名称 | 描述 | 
 | -------- | -------- |
@@ -151,26 +152,17 @@
    // 导入模块
    import distributedDataObject from '@ohos.data.distributedDataObject';
    import UIAbility from '@ohos.app.ability.UIAbility';
-   import { BusinessError } from '@ohos.base';
-   import window from '@ohos.window';
-
-   interface sourceObject{
-     name: string,
-     age: number,
-     isVis: boolean
-     parent: { [key: string]: string },
-     list: { [key: string]: string }[]
-   }
+   
    class EntryAbility extends UIAbility {
-     onWindowStageCreate(windowStage: window.WindowStage) {
-       let source: sourceObject = {
+     onWindowStageCreate(windowStage) {
+       // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
+       let localObject = distributedDataObject.create(this.context, {
          name: 'jack',
          age: 18,
          isVis: false,
          parent: { mother: 'jack mom', father: 'jack Dad' },
          list: [{ mother: 'jack mom' }, { father: 'jack Dad' }]
-       }
-       let localObject: distributedDataObject.DataObject = distributedDataObject.create(this.context, source);
+       });
      }
    }
    ```
@@ -184,43 +176,34 @@
    import featureAbility from '@ohos.ability.featureAbility';
    // 获取context
    let context = featureAbility.getContext();
-   interface sourceObject{
-     name: string,
-     age: number,
-     isVis: boolean
-     parent: { [key: string]: string },
-     list: { [key: string]: string }[]
-   }
-   let source: sourceObject = {
+   // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
+   let localObject = distributedDataObject.create(context, {
      name: 'jack',
      age: 18,
      isVis: false,
      parent: { mother: 'jack mom', father: 'jack Dad' },
      list: [{ mother: 'jack mom' }, { father: 'jack Dad' }]
-   }
-   // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-   let localObject: distributedDataObject.DataObject = distributedDataObject.create(context, source);
+   });
    ```
 
 4. 加入同步组网。同步组网中的数据对象分为发起方和被拉起方。
      
    ```js
    // 设备1加入sessionId
-   let sessionId: string = '123456';
+   let sessionId = '123456';
    
    localObject.setSessionId(sessionId);
    
    // 和设备1协同的设备2加入同一个session
    
    // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
-   let remoteSource: sourceObject = {
+   let remoteObject = distributedDataObject.create(this.context, {
      name: undefined,
      age: undefined, //  undefined表示数据来自对端
      isVis: true,
      parent: undefined,
      list: undefined
-   }
-   let remoteObject: distributedDataObject.DataObject = distributedDataObject.create(this.context, remoteSource);
+   });
    // 收到status上线后remoteObject同步数据，即name变成jack,age是18
    remoteObject.setSessionId(sessionId);
    ```
@@ -228,19 +211,18 @@
 5. 监听对象数据变更。可监听对端数据的变更，以callback作为变更回调实例。
      
    ```js
-   interface ChangeCallback {
-     sessionId: string,
-     fields: Array<string> 
-   }
+   function changeCallback(sessionId, changeData) {
+     console.info(`change: ${sessionId}`);
    
-   localObject.on("change", (changeData:ChangeCallback) => {
-     console.info("change" + changeData.sessionId);
-     if (changeData.fields != null && changeData.fields != undefined) {
-       for (let index: number = 0; index < changeData.fields.length; index++) {
-         console.info(`The element ${localObject[changeData.fields[index]]} changed.`);
-       }
+     if (changeData !== null && changeData !== undefined) {
+       changeData.forEach(element => {
+         console.info(`The element ${localObject[element]} changed.`);
+       });
      }
-   });
+   }
+   
+   // 发起方要在changeCallback里刷新界面，则需要将正确的this绑定给changeCallback
+   localObject.on("change", this.changeCallback.bind(this));
    ```
 
 6. 修改对象属性，对象属性支持基本类型（数字类型、布尔类型、字符串类型）以及复杂类型（数组、基本类型嵌套等）。
@@ -275,14 +257,7 @@
      
    ```js
    // 删除变更回调changeCallback
-   localObject.off('change',(changeData: ChangeCallback) => {
-     console.info("change" + changeData.sessionId);
-     if (changeData.fields != null && changeData.fields != undefined) {
-       for (let index: number = 0; index < changeData.fields.length; index++) {
-         console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
-       }
-     }
-   });
+   localObject.off('change', this.changeCallback);
    // 删除所有的变更回调
    localObject.off('change'); 
    ```
@@ -290,32 +265,27 @@
 9. 监听分布式数据对象的上下线。可以监听对端分布式数据对象的上下线。
      
    ```js
-   interface onStatusCallback {
-     sessionId: string,
-     networkId: string,
-     status: 'online' | 'offline'
+   function statusCallback(sessionId, networkId, status) {
+     // 业务处理
    }
    
-   localObject.on('status', (statusCallback: onStatusCallback) => {
-     console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " +  statusCallback.networkId);
-     // 业务处理
-   });
+   localObject.on('status', this.statusCallback);
    ```
 
 10. 保存和撤回已保存的数据对象。
      
     ```js
     // 保存数据对象，如果应用退出后组网内设备需要恢复对象数据时调用
-    localObject.save("local").then((result: distributedDataObject.SaveSuccessResponse) => {
+    localObject.save('local').then((result) => {
       console.info(`Succeeded in saving. SessionId:${result.sessionId},version:${result.version},deviceId:${result.deviceId}`);
-    }).catch((err: BusinessError) => {
+    }).catch((err) => {
       console.error(`Failed to save. Code:${err.code},message:${err.message}`);
     });
    
     // 撤回保存的数据对象
-    localObject.revokeSave().then((result: distributedDataObject.RevokeSaveSuccessResponse) => {
+    localObject.revokeSave().then((result) => {
       console.info(`Succeeded in revokeSaving. Session:${result.sessionId}`);
-    }).catch((err: BusinessError) => {
+    }).catch((err) => {
       console.error(`Failed to revokeSave. Code:${err.code},message:${err.message}`);
     });
     ```
@@ -323,16 +293,8 @@
 11. 删除监听分布式数据对象的上下线。可以指定删除监听的上下线回调；也可以不指定，这将会删除该分布式数据对象的所有上下线回调。
      
     ```js
-    interface offStatusCallback {
-      sessionId: string,
-      deviceId: string,
-      status: 'online' | 'offline'
-    }
     // 删除上下线回调statusCallback
-    localObject.off('status', (statusCallback: offStatusCallback) => {
-      console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.deviceId);
-      // 业务处理
-    });
+    localObject.off('status', this.statusCallback);
     // 删除所有的上下线回调
     localObject.off('status');
     ```
@@ -341,7 +303,7 @@
      
     ```js
     localObject.setSessionId(() => {
-      console.info('leave all session.');
+        console.info('leave all session.');
     });
     ```
 

zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md

@@ -5,6 +5,7 @@
 > **说明：**
 >
 > 本模块首批接口从API version 8开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。
+> 本模块接口仅支持在JS文件中使用。
 
 
 ## 导入模块
@@ -42,20 +43,10 @@ FA模型示例：
 // 导入模块
 import distributedObject from '@ohos.data.distributedDataObject';
 import featureAbility from '@ohos.ability.featureAbility';
-import { BusinessError } from '@ohos.base';
 // 获取context
 let context = featureAbility.getContext();
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
-}
-let g_object: distributedObject.DataObject = distributedObject.create(context, source);
+// 创建对象，该对象包含4个属性类型：string、number、boolean和Object
+let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
 ```
 
 Stage模型示例：
@@ -64,23 +55,13 @@ Stage模型示例：
 // 导入模块
 import distributedObject from '@ohos.data.distributedDataObject';
 import UIAbility from '@ohos.app.ability.UIAbility';
-import { BusinessError } from '@ohos.base';
-import window from '@ohos.window';
-
-let g_object: distributedObject.DataObject = null;
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
+
+let g_object;
+
 class EntryAbility extends UIAbility {
-    onWindowStageCreate(windowStage: window.WindowStage) {
-        let source: sourceObject = {
-            name: "amy",
-            age:18,
-            isVis:false
-        }
-        g_object = distributedObject.create(this.context, source);
+    onWindowStageCreate(windowStage){
+        // 创建对象，该对象包含4个属性类型：string、number、boolean和Object
+        g_object = distributedObject.create(this.context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
     }
 }
 ```
@@ -103,7 +84,7 @@ genSessionId(): string
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-let sessionId: string = distributedObject.genSessionId();
+let sessionId = distributedObject.genSessionId();
 ```
 
 ## SaveSuccessResponse<sup>9+</sup>
@@ -239,13 +220,13 @@ setSessionId(sessionId?: string): Promise&lt;void&gt;
 // g_object加入分布式组网
 g_object.setSessionId(distributedObject.genSessionId()).then (()=>{
     console.info("join session.");
-    }).catch((error: BusinessError)=>{
+    }).catch((error)=>{
         console.info("error:" + error.code + error.message);
 });
 // 退出分布式组网
 g_object.setSessionId().then (()=>{
     console.info("leave all session.");
-    }).catch((error: BusinessError)=>{
+    }).catch((error)=>{
         console.info("error:" + error.code + error.message);
 });
 ```
@@ -268,18 +249,15 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
 **示例：**
 
 ```js
-interface ChangeCallback {
-  sessionId: string,
-  fields: Array<string>
-}
-g_object.on("change", (changeData: ChangeCallback) => {
-    console.info("change" + changeData.sessionId);
-    if (changeData.fields != null && changeData.fields != undefined) {
-        for (let index: number = 0; index < changeData.fields.length; index++) {
-            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
-        }
+globalThis.changeCallback = (sessionId, changeData) => {
+    console.info("change" + sessionId);
+    if (changeData != null && changeData != undefined) {
+        changeData.forEach(element => {
+        console.info("changed !" + element + " " + g_object[element]);
+        });
     }
-});
+}
+g_object.on("change", globalThis.changeCallback);
 ```
 
 ### off('change')<sup>9+</sup>
@@ -302,14 +280,7 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
 
 ```js
 // 删除数据变更回调changeCallback
-g_object.off("change", (changeData:ChangeCallback) => {
-    console.info("change" + changeData.sessionId);
-    if (changeData.fields != null && changeData.fields != undefined) {
-        for (let index: number = 0; index < changeData.fields.length; index++) {
-            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
-        }
-    }
-});
+g_object.off("change", globalThis.changeCallback);
 // 删除所有的数据变更回调
 g_object.off("change");
 ```
@@ -332,15 +303,10 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
 **示例：**
 
 ```js
-interface onStatusCallback {
-    sessionId: string,
-    networkId: string,
-    status: 'online' | 'offline'
+globalThis.statusCallback = (sessionId, networkId, status) => {
+    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
 }
-
-g_object.on("status", (statusCallback:onStatusCallback) => {
-    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
-});
+g_object.on("status", globalThis.statusCallback);
 ```
 
 ### off('status')<sup>9+</sup>
@@ -362,15 +328,11 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
 **示例：**
 
 ```js
-interface offStatusCallback {
-    sessionId: string,
-    networkId: string,
-    status: 'online' | 'offline'
+globalThis.statusCallback = (sessionId, networkId, status) => {
+    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
 }
 // 删除上下线回调changeCallback
-g_object.off("status", (statusCallback:StatusCallback) => {
-    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
-});
+g_object.off("status",globalThis.statusCallback);
 // 删除所有的上下线回调
 g_object.off("status");
 ```
@@ -402,7 +364,7 @@ save(deviceId: string, callback: AsyncCallback&lt;SaveSuccessResponse&gt;): void
 
 ```ts
 g_object.setSessionId("123456");
-g_object.save("local", (err: BusinessError, result:distributedObject.SaveSuccessResponse) => {
+g_object.save("local", (err, result) => {
     if (err) {
         console.info("save failed, error code = " + err.code);
         console.info("save failed, error message: " + err.message);
@@ -447,12 +409,12 @@ save(deviceId: string): Promise&lt;SaveSuccessResponse&gt;
 
 ```js
 g_object.setSessionId("123456");
-g_object.save("local").then((result: distributedObject.SaveSuccessResponse) => {
+g_object.save("local").then((result) => {
     console.info("save callback");
     console.info("save sessionId " + result.sessionId);
     console.info("save version " + result.version);
     console.info("save deviceId " + result.deviceId);
-}).catch((err: BusinessError) => {
+}).catch((err) => {
     console.info("save failed, error code = " + err.code);
     console.info("save failed, error message: " + err.message);
 });
@@ -480,7 +442,7 @@ revokeSave(callback: AsyncCallback&lt;RevokeSaveSuccessResponse&gt;): void
 ```js
 g_object.setSessionId("123456");
 // 持久化数据
-g_object.save("local", (err: BusinessError, result: distributedObject.SaveSuccessResponse) => {
+g_object.save("local", (err, result) => {
     if (err) {
         console.info("save failed, error code = " + err.code);
         console.info("save failed, error message: " + err.message);
@@ -492,7 +454,7 @@ g_object.save("local", (err: BusinessError, result: distributedObject.SaveSucces
     console.info("save deviceId:  " + result.deviceId);
 });
 // 删除持久化保存的数据
-g_object.revokeSave((err: BusinessError, result: distributedObject.RevokeSaveSuccessResponse) => {
+g_object.revokeSave((err, result) => {
     if (err) {
       console.info("revokeSave failed, error code = " + err.code);
       console.info("revokeSave failed, error message: " + err.message);
@@ -525,20 +487,20 @@ revokeSave(): Promise&lt;RevokeSaveSuccessResponse&gt;
 ```ts
 g_object.setSessionId("123456");
 // 持久化数据
-g_object.save("local").then((result: distributedObject.SaveSuccessResponse) => {
+g_object.save("local").then((result) => {
     console.info("save callback");
     console.info("save sessionId " + result.sessionId);
     console.info("save version " + result.version);
     console.info("save deviceId " + result.deviceId);
-}).catch((err: BusinessError) => {
+}).catch((err) => {
     console.info("save failed, error code = " + err.code);
     console.info("save failed, error message: " + err.message);
 });
 // 删除持久化保存的数据
-g_object.revokeSave().then((result: distributedObject.RevokeSaveSuccessResponse) => {
+g_object.revokeSave().then((result) => {
     console.info("revokeSave callback");
     console.info("sessionId" + result.sessionId);
-}).catch((err: BusinessError)=> {
+}).catch((err)=> {
     console.info("revokeSave failed, error code = " + err.code);
     console.info("revokeSave failed, error message = " + err.message);
 });
@@ -573,17 +535,8 @@ createDistributedObject(source: object): DistributedObject
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
-}
-let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+// 创建对象，对象包含4个属性类型，string,number,boolean和Object
+let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
 ```
 
 ## DistributedObject<sup>(deprecated)</sup>
@@ -620,17 +573,7 @@ setSessionId(sessionId?: string): boolean
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
-}
-let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});;
 // g_object加入分布式组网
 g_object.setSessionId(distributedObject.genSessionId());
 // 设置为""退出分布式组网
@@ -660,29 +603,16 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
-interface ChangeCallback {
-    sessionId: string,
-    fields: Array<string>
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
-}
-let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
-g_object.on("change", (changeData:ChangeCallback) => {
-    console.info("change" + changeData.sessionId);
-    if (changeData.fields != null && changeData.fields != undefined) {
-        for (let index: number = 0; index < changeData.fields.length; index++) {
-            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
-        }
+let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+globalThis.changeCallback = (sessionId, changeData) => {
+    console.info("change" + sessionId);
+    if (changeData != null && changeData != undefined) {
+        changeData.forEach(element => {
+        console.info("changed !" + element + " " + g_object[element]);
+        });
     }
-});
+}
+g_object.on("change", globalThis.changeCallback);
 ```
 
 ### off('change')<sup>(deprecated)</sup>
@@ -709,30 +639,9 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
-interface ChangeCallback {
-    sessionId: string,
-    fields: Array<string>
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
-}
-let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
+let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
 // 删除数据变更回调changeCallback
-g_object.off("change", (changeData:ChangeCallback) => {
-    console.info("change" + changeData.sessionId);
-    if (changeData.fields != null && changeData.fields != undefined) {
-        for (let index: number = 0; index < changeData.fields.length; index++) {
-            console.info("changed !" + changeData.fields[index] + " " + g_object[changeData.fields[index]]);
-        }
-    }
-});
+g_object.off("change", globalThis.changeCallback);
 // 删除所有的数据变更回调
 g_object.off("change");
 ```
@@ -760,27 +669,11 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
-}
-interface StatusCallback {
-    sessionId: string,
-    networkId: string,
-    status: 'online' | 'offline'
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
+globalThis.statusCallback = (sessionId, networkId, status) => {
+    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
 }
-let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
-
-g_object.on("status", (statusCallback:StatusCallback) => {
-    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.networkId);
-});
+let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+g_object.on("status", globalThis.statusCallback);
 ```
 
 ### off('status')<sup>(deprecated)</sup>
@@ -807,26 +700,12 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
 
 ```js
 import distributedObject from '@ohos.data.distributedDataObject';
-interface sourceObject{
-    name: string,
-    age: number,
-    isVis: boolean
+let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
+globalThis.statusCallback = (sessionId, networkId, status) => {
+    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
 }
-interface offStatusCallback {
-    sessionId: string,
-    deviceId: string,
-    status: 'online' | 'offline'
-}
-let source: sourceObject = {
-    name: "amy",
-    age:18,
-    isVis:false
-}
-let g_object: distributedObject.DistributedObject = distributedObject.createDistributedObject(source);
 // 删除上下线回调changeCallback
-g_object.off("status", (statusCallback:offStatusCallback) => {
-    console.info("status changed " + statusCallback.sessionId + " " + statusCallback.status + " " + statusCallback.deviceId);
-});
+g_object.off("status",globalThis.statusCallback);
 // 删除所有的上下线回调
 g_object.off("status");
-```
+```
\ No newline at end of file

zh-cn/application-dev/reference/apis/js-apis-data-preferences.md

@@ -12,7 +12,7 @@
 
 ## 导入模块
 
-```js
+```ts
 import data_preferences from '@ohos.data.preferences';
 ```
 
@@ -46,13 +46,13 @@ getPreferences(context: Context, name: string, callback: AsyncCallback<Prefer
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base';
 
 let context = featureAbility.getContext();
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 try {
     data_preferences.getPreferences(context, 'myStore', (err: BusinessError, val: data_preferences.Preferences) => {
@@ -64,7 +64,9 @@ try {
         console.info("Succeeded in getting preferences.");
     })
 } catch (err) {
-    console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -75,7 +77,7 @@ import UIAbility from '@ohos.app.ability.UIAbility';
 import { BusinessError } from '@ohos.base';
 import window from '@ohos.window';
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 class EntryAbility extends UIAbility {
     onWindowStageCreate(windowStage: window.WindowStage) {
@@ -89,7 +91,9 @@ class EntryAbility extends UIAbility {
                 console.info("Succeeded in getting preferences.");
             })
         } catch (err) {
-            console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to get preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -120,14 +124,14 @@ getPreferences(context: Context, name: string): Promise<Preferences>
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
 
 let context = featureAbility.getContext();
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 try {
     let promise = data_preferences.getPreferences(context, 'myStore');
     promise.then((object: data_preferences.Preferences) => {
@@ -136,8 +140,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -148,7 +154,7 @@ import UIAbility from '@ohos.app.ability.UIAbility';
 import { BusinessError } from '@ohos.base'
 import window from '@ohos.window';
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 class EntryAbility extends UIAbility {
     onWindowStageCreate(windowStage: window.WindowStage) {
@@ -160,8 +166,10 @@ class EntryAbility extends UIAbility {
             }).catch((err: BusinessError) => {
                 console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             })
-        } catch(err) {
-            console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to get preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -196,13 +204,13 @@ getPreferences(context: Context, options: Options, callback: AsyncCallback<Pr
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
 
 let context = featureAbility.getContext();
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 try {
     let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
@@ -215,7 +223,9 @@ try {
         console.info("Succeeded in getting preferences.");
     })
 } catch (err) {
-    console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -227,7 +237,7 @@ import UIAbility from '@ohos.app.ability.UIAbility';
 import { BusinessError } from '@ohos.base'
 import window from '@ohos.window';
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 class EntryAbility extends UIAbility {
     onWindowStageCreate(windowStage: window.WindowStage) {
@@ -242,7 +252,9 @@ class EntryAbility extends UIAbility {
                 console.info("Succeeded in getting preferences.");
             })
         } catch (err) {
-            console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to get preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -282,13 +294,13 @@ getPreferences(context: Context, options: Options): Promise<Preferences>
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
 let context = featureAbility.getContext();
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 try {
     let options: data_preferences.Options =  { name: 'myStore' };
     let promise = data_preferences.getPreferences(context, options);
@@ -298,8 +310,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -310,7 +324,7 @@ import UIAbility from '@ohos.app.ability.UIAbility';
 import { BusinessError } from '@ohos.base'
 import window from '@ohos.window';
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 class EntryAbility extends UIAbility {
     onWindowStageCreate(windowStage: window.WindowStage) {
@@ -323,8 +337,10 @@ class EntryAbility extends UIAbility {
             }).catch((err: BusinessError) => {
                 console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
             })
-        } catch(err) {
-            console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to get preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -364,19 +380,21 @@ getPreferencesSync(context: Context, options: Options): Preferences
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
 
 let context = featureAbility.getContext();
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 try {
     let options: data_preferences.Options =  { name: 'myStore' };
     preferences = data_preferences.getPreferencesSync(context, options);
-} catch(err) {
-    console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -387,15 +405,17 @@ import UIAbility from '@ohos.app.ability.UIAbility';
 import { BusinessError } from '@ohos.base'
 import window from '@ohos.window';
 
-let preferences: data_preferences.Preferences = null;
+let preferences: data_preferences.Preferences | null = null;
 
 class EntryAbility extends UIAbility {
     onWindowStageCreate(windowStage: window.WindowStage) {
         try {
             let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
             preferences = data_preferences.getPreferencesSync(this.context, options);
-        } catch(err) {
-            console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to get preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -431,7 +451,7 @@ deletePreferences(context: Context, name: string, callback: AsyncCallback<voi
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -447,7 +467,9 @@ try {
         console.info("Succeeded in deleting preferences." );
     })
 } catch (err) {
-    console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -469,7 +491,9 @@ class EntryAbility extends UIAbility {
                 console.info("Succeeded in deleting preferences." );
             })
         } catch (err) {
-            console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to delete preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -510,7 +534,7 @@ deletePreferences(context: Context, name: string): Promise<void>
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -524,8 +548,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -545,8 +571,10 @@ class EntryAbility extends UIAbility {
             }).catch((err: BusinessError) => {
                 console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
             })
-        } catch(err) {
-            console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to delete preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -584,7 +612,7 @@ deletePreferences(context: Context, options: Options, callback: AsyncCallback&lt
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -601,7 +629,9 @@ try {
         console.info("Succeeded in deleting preferences." );
     })
 } catch (err) {
-    console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -624,7 +654,9 @@ class EntryAbility extends UIAbility {
                 console.info("Succeeded in deleting preferences." );
             })
         } catch (err) {
-            console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to delete preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -668,7 +700,7 @@ deletePreferences(context: Context, options: Options): Promise<void>
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -683,8 +715,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -705,8 +739,10 @@ class EntryAbility extends UIAbility {
             }).catch((err: BusinessError) => {
                 console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
             })
-        } catch(err) {
-            console.error("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to delete preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -737,7 +773,7 @@ removePreferencesFromCache(context: Context, name: string, callback: AsyncCallba
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -752,7 +788,9 @@ try {
         console.info("Succeeded in removing preferences.");
     })
 } catch (err) {
-    console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to remove preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -774,7 +812,9 @@ class EntryAbility extends UIAbility {
                 console.info("Succeeded in removing preferences.");
             })
         } catch (err) {
-            console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to remove preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -809,7 +849,7 @@ removePreferencesFromCache(context: Context, name: string): Promise<void>
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -822,8 +862,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to remove preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -843,8 +885,10 @@ class EntryAbility extends UIAbility {
             }).catch((err: BusinessError) => {
                 console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
             })
-        } catch(err) {
-            console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to remove preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -873,14 +917,16 @@ removePreferencesFromCacheSync(context: Context, name: string): void
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 try {
     data_preferences.removePreferencesFromCacheSync(context, 'myStore');
-} catch(err) {
-    console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to remove preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -893,8 +939,10 @@ class EntryAbility extends UIAbility {
     onWindowStageCreate(windowStage: window.WindowStage) {
         try {
             data_preferences.removePreferencesFromCacheSync(this.context, 'myStore');
-        } catch(err) {
-            console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to remove preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -933,7 +981,7 @@ removePreferencesFromCache(context: Context, options: Options, callback: AsyncCa
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -948,7 +996,9 @@ try {
         console.info("Succeeded in removing preferences.");
     })
 } catch (err) {
-    console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to remove preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -971,7 +1021,9 @@ class EntryAbility extends UIAbility {
                 console.info("Succeeded in removing preferences.");
             })
         } catch (err) {
-            console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to remove preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -1015,7 +1067,7 @@ removePreferencesFromCache(context: Context, options: Options): Promise<void&
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 import { BusinessError } from '@ohos.base'
@@ -1028,8 +1080,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to remove preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1050,8 +1104,10 @@ class EntryAbility extends UIAbility {
             }).catch((err: BusinessError) => {
                 console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
             })
-        } catch(err) {
-            console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to remove preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -1089,15 +1145,17 @@ removePreferencesFromCacheSync(context: Context, options: Options):void
 
 FA模型示例：
 
-```js
+```ts
 // 获取context
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 try {
     let options: data_preferences.Options = { name: 'myStore' };
     data_preferences.removePreferencesFromCacheSync(context, options);
-} catch(err) {
-    console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to remove preferences. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1112,8 +1170,10 @@ class EntryAbility extends UIAbility {
         try {
             let options: data_preferences.Options = { name: 'myStore', dataGroupId:'myId' };
             data_preferences.removePreferencesFromCacheSync(this.context, options);
-        } catch(err) {
-            console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+        } catch (err) {
+            let code = (err as BusinessError).code;
+            let message = (err as BusinessError).message;
+            console.error("Failed to remove preferences. code =" + code + ", message =" + message);
         }
     }
 }
@@ -1155,7 +1215,7 @@ get(key: string, defValue: ValueType, callback: AsyncCallback<ValueType>):
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.get('startup', 'default', (err: BusinessError, val: data_preferences.ValueType) => {
         if (err) {
@@ -1165,7 +1225,9 @@ try {
         console.info("Succeeded in getting value of 'startup'. val： " + val);
     })
 } catch (err) {
-    console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get value of 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1193,7 +1255,7 @@ get(key: string, defValue: ValueType): Promise<ValueType>
 
 **示例：**
 
-```js
+```ts
 try {
     let promise = preferences.get('startup', 'default');
     promise.then((data: data_preferences.ValueType) => {
@@ -1201,8 +1263,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get value of 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1229,12 +1293,14 @@ getSync(key: string, defValue: ValueType): ValueType
 
 **示例：**
 
-```js
+```ts
 try {
     let value: data_preferences.ValueType = preferences.getSync('startup', 'default');
     console.info("Succeeded in getting value of 'startup'. Data: " + value);
-} catch(err) {
-    console.error("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get value of 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1254,19 +1320,28 @@ getAll(callback: AsyncCallback<Object>): void;
 
 **示例：**
 
-```js
+```ts
+// 由于ArkTS中无Object.keys，且无法使用for..in...
+// 若报ArkTS问题，请将此方法单独抽离至一个ts文件中并暴露，在需要用到的ets文件中引入使用
+function getObjKeys(obj: Object): string[] {
+  let keys = Object.keys(obj);
+  return keys;
+}
+
 try {
-    preferences.getAll((err: BusinessError, value: data_preferences.ValueType) => {
+    preferences.getAll((err: BusinessError, value: Object) => {
         if (err) {
             console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
             return;
         }
-        let allKeys = Object.keys(value);
+        let allKeys = getObjKeys(value);
         console.info("getAll keys = " + allKeys);
         console.info("getAll object = " + JSON.stringify(value));
     })
 } catch (err) {
-    console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get all key-values. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1287,18 +1362,27 @@ getAll(): Promise<Object>
 
 **示例：**
 
-```js
+```ts
+// 由于ArkTS中无Object.keys，且无法使用for..in...
+// 若报ArkTS问题，请将此方法单独抽离至一个ts文件中并暴露，在需要用到的ets文件中引入使用
+function getObjKeys(obj: Object): string[] {
+  let keys = Object.keys(obj);
+  return keys;
+}
+
 try {
     let promise = preferences.getAll();
-    promise.then((value: data_preferences.ValueType) => {
-        let allKeys = Object.keys(value);
+    promise.then((value: Object) => {
+        let allKeys = getObjKeys(value);
         console.info('getAll keys = ' + allKeys);
         console.info("getAll object = " + JSON.stringify(value));
     }).catch((err: BusinessError) => {
         console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
     })
 } catch (err) {
-    console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get all key-values. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1318,14 +1402,23 @@ getAllSync(): Object
 
 **示例：**
 
-```js
+```ts
+// 由于ArkTS中无Object.keys，且无法使用for..in...
+// 若报ArkTS问题，请将此方法单独抽离至一个ts文件中并暴露，在需要用到的ets文件中引入使用
+function getObjKeys(obj: Object): string[] {
+  let keys = Object.keys(obj);
+  return keys;
+}
+
 try {
     let value = preferences.getAllSync();
-    let allKeys = Object.keys(value);
+    let allKeys = getObjKeys(value);
     console.info('getAll keys = ' + allKeys);
     console.info("getAll object = " + JSON.stringify(value));
 } catch (err) {
-    console.error("Failed to get all key-values. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to get all key-values. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1347,7 +1440,7 @@ put(key: string, value: ValueType, callback: AsyncCallback<void>): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.put('startup', 'auto', (err: BusinessError) => {
         if (err) {
@@ -1357,7 +1450,9 @@ try {
         console.info("Succeeded in putting value of 'startup'.");
     })
 } catch (err) {
-    console.error("Failed to put value of 'startup'. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to put value of 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1385,7 +1480,7 @@ put(key: string, value: ValueType): Promise<void>
 
 **示例：**
 
-```js
+```ts
 try {
     let promise = preferences.put('startup', 'auto');
     promise.then(() => {
@@ -1393,8 +1488,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to put value of 'startup'. code =" + err.code +", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to put value of 'startup'. code =" + err.code +", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to put value of 'startup'. code =" + code +", message =" + message);
 }
 ```
 
@@ -1416,11 +1513,13 @@ putSync(key: string, value: ValueType): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.putSync('startup', 'auto');
-} catch(err) {
-    console.error("Failed to put value of 'startup'. code =" + err.code +", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to put value of 'startup'. code =" + code +", message =" + message);
 }
 ```
 
@@ -1442,7 +1541,7 @@ has(key: string, callback: AsyncCallback<boolean>): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.has('startup', (err: BusinessError, val: boolean) => {
         if (err) {
@@ -1456,7 +1555,9 @@ try {
         }
     })
 } catch (err) {
-    console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to check the key 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1483,7 +1584,7 @@ has(key: string): Promise<boolean>
 
 **示例：**
 
-```js
+```ts
 try {
     let promise = preferences.has('startup');
     promise.then((val: boolean) => {
@@ -1495,8 +1596,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to check the key 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1523,7 +1626,7 @@ hasSync(key: string): boolean
 
 **示例：**
 
-```js
+```ts
 try {
     let isExist: boolean = preferences.hasSync('startup');
     if (isExist) {
@@ -1531,8 +1634,10 @@ try {
     } else {
         console.info("The key 'startup' dose not contain.");
     }
-} catch(err) {
-    console.error("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to check the key 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1554,7 +1659,7 @@ delete(key: string, callback: AsyncCallback<void>): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.delete('startup', (err: BusinessError) => {
         if (err) {
@@ -1564,7 +1669,9 @@ try {
         console.info("Succeeded in deleting the key 'startup'.");
     })
 } catch (err) {
-    console.error("Failed to delete the key 'startup'. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete the key 'startup'. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1591,7 +1698,7 @@ delete(key: string): Promise<void>
 
 **示例：**
 
-```js
+```ts
 try {
     let promise = preferences.delete('startup');
     promise.then(() => {
@@ -1599,8 +1706,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete the key 'startup'. code =" + code +", message =" + message);
 }
 ```
 
@@ -1621,11 +1730,13 @@ deleteSync(key: string): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.deleteSync('startup');
-} catch(err) {
-    console.error("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to delete the key 'startup'. code =" + code +", message =" + message);
 }
 ```
 
@@ -1646,7 +1757,7 @@ flush(callback: AsyncCallback<void>): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.flush((err: BusinessError) => {
         if (err) {
@@ -1656,7 +1767,9 @@ try {
         console.info("Succeeded in flushing.");
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1677,7 +1790,7 @@ flush(): Promise<void>
 
 **示例：**
 
-```js
+```ts
 try {
     let promise = preferences.flush();
     promise.then(() => {
@@ -1686,7 +1799,9 @@ try {
         console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1707,7 +1822,7 @@ clear(callback: AsyncCallback<void>): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.clear((err: BusinessError) =>{
         if (err) {
@@ -1717,7 +1832,9 @@ try {
         console.info("Succeeded in clearing.");
     })
 } catch (err) {
-    console.error("Failed to clear. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to clear. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1738,7 +1855,7 @@ clear(): Promise<void>
 
 **示例：**
 
-```js
+```ts
 try {
     let promise = preferences.clear();
     promise.then(() => {
@@ -1746,8 +1863,10 @@ try {
     }).catch((err: BusinessError) => {
         console.error("Failed to clear. code =" + err.code + ", message =" + err.message);
     })
-} catch(err) {
-    console.error("Failed to clear. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to clear. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1762,11 +1881,13 @@ clearSync(): void
 
 **示例：**
 
-```js
+```ts
 try {
     preferences.clearSync();
-} catch(err) {
-    console.error("Failed to clear. code =" + err.code + ", message =" + err.message);
+} catch (err) {
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to clear. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1788,7 +1909,7 @@ on(type: 'change', callback: Callback<{ key : string }>): void
 
 **示例：**
 
-```js
+```ts
 interface observer {
   key: string
 }
@@ -1818,7 +1939,9 @@ try {
         })
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1849,7 +1972,7 @@ on(type: 'multiProcessChange', callback: Callback<{ key : string }>): void
 
 **示例1：**
 
-```js
+```ts
 interface observer {
   key: string
 }
@@ -1879,13 +2002,15 @@ try {
         })
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 
 **示例2：**
 
-```js
+```ts
 interface observer {
   key: string
 }
@@ -1909,7 +2034,9 @@ try {
                     console.info("Succeeded in removing preferences.");
                 })
             } catch (err) {
-                console.error("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
+                let code = (err as BusinessError).code;
+                let message = (err as BusinessError).message;
+                console.error("Failed to remove preferences. code =" + code + ", message =" + message);
             }
 
             try {
@@ -1922,7 +2049,9 @@ try {
                     console.info("Succeeded in getting preferences.");
                 })
             } catch (err) {
-                console.error("Failed to get preferences. code =" + err.code + ", message =" + err.message);
+                let code = (err as BusinessError).code;
+                let message = (err as BusinessError).message;
+                console.error("Failed to get preferences. code =" + code + ", message =" + message);
             }
         });
         preferences.put('startup', 'manual', (err: BusinessError) => {
@@ -1942,7 +2071,9 @@ try {
         })
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 
@@ -1963,7 +2094,7 @@ off(type: 'change', callback?: Callback<{ key : string }>): void
 
 **示例：**
 
-```js
+```ts
 interface observer {
   key: string
 }
@@ -1996,7 +2127,9 @@ try {
         })
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 
@@ -2017,7 +2150,7 @@ off(type: 'multiProcessChange', callback?: Callback<{ key : string }>): vo
 
 **示例：**
 
-```js
+```ts
 interface observer {
   key: string
 }
@@ -2051,7 +2184,9 @@ try {
         })
     })
 } catch (err) {
-    console.error("Failed to flush. code =" + err.code + ", message =" + err.message);
+    let code = (err as BusinessError).code;
+    let message = (err as BusinessError).message;
+    console.error("Failed to flush. code =" + code + ", message =" + message);
 }
 ```
 ## ValueType