update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/apis/js-apis-data-distributedobject.md

 # Distributed Data Object
 
+Provides basic data object management, including creating, querying, deleting, modifying, and subscribing to data objects, and distributed data object collaboration for the same application among multiple devices.
+
 > **NOTE**<br/>
+>
 > The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 
@@ -38,7 +41,7 @@ Creates a distributed data object.
   ```
 
 
-## distributedObject.genSessionId()
+## distributedObject.genSessionId
 
 genSessionId(): string
 
@@ -110,19 +113,19 @@ Subscribes to the changes of this distributed data object.
   | callback | Callback<{ sessionId: string, fields: Array&lt;string&gt; }> | Yes| Callback used to return the changes of the distributed data object.<br>**sessionId** indicates the session ID of the distributed data object.<br>**fields** indicates the changed attributes of the distributed data object.|
 
 **Example**
-  ```js
-  import distributedObject from '@ohos.data.distributedDataObject';
-  var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
-                 parent:{mother:"jack mom",father:"jack Dad"}});
-  g_object.on("change", function (sessionId, changeData) {
-      console.info("change" + sessionId);  
-      if (changeData != null && changeData != undefined) {
-          changeData.forEach(element => {
-              console.info("changed !" + element + " " + g_object[element]);
-          });
-      }
-  });
-  ```
+```js
+import distributedObject from '@ohos.data.distributedDataObject';  
+var 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')
 
@@ -140,20 +143,14 @@ Unsubscribes from the changes of this distributed data object.
 
 
 **Example**
-  ```js
-  import distributedObject from '@ohos.data.distributedDataObject';
-  var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
-                 parent:{mother:"jack mom",father:"jack Dad"}});
-  g_object.on("change", function (sessionId, changeData) {
-      console.info("change" + sessionId);
-  });
-  // Unregister the specified data change callback for the distributed data object.
-  g_object.off("change", function (sessionId, changeData) {
-      console.info("change" + sessionId);
-  });
-  // Unregister all data change callbacks for the distributed data object.
-  g_object.off("change");
-  ```
+```js
+import distributedObject from '@ohos.data.distributedDataObject';  
+var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false,parent:{mother:"jack mom",father:"jack Dad"}});
+// Unregister the specified data change callback.
+g_object.off("change", globalThis.changeCallback);
+// Unregister all data change callbacks.
+g_object.off("change");
+```
 
 ### on('status')
 
@@ -170,14 +167,14 @@ Subscribes to the status change (online or offline) of this distributed data obj
   | callback | Callback<{ sessionId: string, networkId: string, status: 'online' \| 'offline' }> | Yes| Callback used to return the status change.<br>**sessionId** indicates the session ID of the distributed data object.<br>**networkId** indicates the network ID of the device.<br>**status** indicates the status, which can be online or offline.|
 
 **Example**
-  ```js
-  import distributedObject from '@ohos.data.distributedDataObject';
-  var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
-                 parent:{mother:"jack mom",father:"jack Dad"}});
-  g_object.on("status", function (sessionId, networkId, status) {
-      this.response += "status changed " + sessionId + " " + status + " " + networkId;
-  });
-  ```
+```js
+import distributedObject from '@ohos.data.distributedDataObject';
+globalThis.statusCallback = (sessionId, networkId, status) => {
+    globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
+}
+var 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')
 
@@ -196,15 +193,14 @@ Unsubscribes from the status change (online or offline) of this distributed data
 
 
 **Example**
-  ```js
-  import distributedObject from '@ohos.data.distributedDataObject'; 
-  g_object.on("status", function (sessionId, networkId, status) {
-      this.response += "status changed " + sessionId + " " + status + " " + networkId;
-  });
-  // Unsubscribe from the specified status change callback for the distributed data object.
-  g_object.off("status", function (sessionId, networkId, status) {
-      this.response += "status changed " + sessionId + " " + status + " " + networkId;
-  });
-  // Unsubscribe from all status change callbacks for the distributed data object.
-  g_object.off("status");
-  ```
+```js
+import distributedObject from '@ohos.data.distributedDataObject'; 
+var 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;
+}
+// Unsubscribe from the specified status change callback for the distributed data object.
+g_object.off("status",globalThis.statusCallback);
+// Unsubscribe from all status change callbacks for the distributed data object.
+g_object.off("status");
+```