update docs

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

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

-# Distributed Object
+# Distributed Data Object
 
 > ![icon-note.gif](public_sys-resources/icon-note.gif) **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.
@@ -17,16 +17,21 @@ import distributedObject from '@ohos.data.distributedDataObject'
 createDistributedObject(source: object): DistributedObject
 
 
-Creates a **distributedObject** instance. You can specify the attribute of the instance in **source**. This method returns the **distributedObject** instance created.
+Creates a distributed data object.
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
 
-- **Parameters**
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
-  | object | source | Yes| Attribute of the **distributedObject** instance to create.|
+  | source | object | Yes| Attribute of the distributed data object to create.|
   
-- Example
+**Return Value**
+  | Type| Description|
+  | -------- | -------- |
+  | [DistributedObject](#distributedobject) | Distributed data object created.|
+
+**Example**
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'
   // Create a distributedObject instance. The attribute type of the object can be string, number, boolean, or Object.
@@ -39,16 +44,16 @@ Creates a **distributedObject** instance. You can specify the attribute of the i
 
 genSessionId(): string
 
-Creates a session ID randomly.
+Creates a random session ID.
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
 
-- Return value
+**Return Value**
   | Type| Description|
   | -------- | -------- |
   | string | Session ID created.|
 
-- Example
+**Example**
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'
   var sessionId = distributedObject.genSessionId();
@@ -58,20 +63,29 @@ Creates a session ID randomly.
 ## DistributedObject
 
 Represents a **distributedObject** instance.
+
 ### setSessionId
 
 setSessionId(sessionId?: string): boolean
 
-Sets a session ID for synchronization. Automatic synchronization is performed for multiple devices with the same session ID on a trusted network. To remove a device from the distributed network, set this parameter to "" or leave it unspecified. If **true** is returned, the session ID is set successfully.
+Sets a session ID for synchronization. Automatic synchronization is performed for multiple devices with the same session ID on a trusted network.
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+
+**Parameters**
 
-- **Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
-  | sessionId | string | No| ID of a distributed object on a trusted network.|
+  | sessionId | string | No| ID of a distributed data object on a trusted network. To remove a distributed data object from the network, set this parameter to "" or leave it empty.|
+
+**Return Value**
+
+  | Type| Description|
+  | -------- | -------- |
+  | boolean | Returns **true** if the session ID is set successfully;<br>returns **false** otherwise. |
   
-- Example
+**Example**
+
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'
   var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
@@ -87,17 +101,17 @@ Sets a session ID for synchronization. Automatic synchronization is performed fo
 
 on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;string&gt; }>): void
 
-Subscribes to the data changes of this distributed object.
+Subscribes to the data changes of this distributed data object.
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
 
-- **Parameters**
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | type | string | Yes| Event type to subscribe to. The value is **change**, which indicates data change events.|
-  | callback | Callback<{ sessionId: string, fields: Array&lt;string&gt; }> | Yes| Callback used to return the data changes of the distributed object. In the callback, **sessionId** indicates the session ID of the distributed object, and **fields** indicates the attributes of the 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 attributes of the distributed data object changed.|
 
-- Example
+**Example**
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'
   var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
@@ -116,18 +130,18 @@ Subscribes to the data changes of this distributed object.
 
 off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;string&gt; }>): void
 
-Unsubscribes from the data changes of this distributed object.
+Unsubscribes from the data changes of this distributed data object.
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
 
-- **Parameters**
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
-  | type | string | Yes| Event type to unsubscribe from. The value is **change**, which indicates data change events.|
-  | callback | Callback<{ sessionId: string, fields: Array&lt;string&gt; }> | No| Callback used to return changes of the distributed object. If this parameter is not specified, all callbacks related to data changes will be unregistered.|
+  | type | string | Yes| Event type to subscribe to. The value is **change**, which indicates data change events.|
+  | callback | Callback<{ sessionId: string, fields: Array&lt;string&gt; }> | No| Callback used to return changes of the distributed data object. If this parameter is not specified, all callbacks related to data changes will be unregistered.<br>**sessionId** indicates the session ID of the distributed data object.<br>**fields** indicates the attributes of the distributed data object changed.|
 
 
-- Example
+**Example**
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'
   var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
@@ -135,7 +149,7 @@ Unsubscribes from the data changes of this distributed object.
   g_object.on("change", function (sessionId, changeData) {
       console.info("change" + sessionId);
   });
-  // Unsubscribe from the data change callback for the specified distributed object.
+  // Unsubscribe from the data change callback for the specified distributed data object.
   g_object.off("change", function (sessionId, changeData) {
       console.info("change" + sessionId);
   });
@@ -147,17 +161,19 @@ Unsubscribes from the data changes of this distributed object.
 
 on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, status: 'online' | 'offline' }>): void
 
-Subscribes to the status changes (online or offline) of this distributed object. 
+Subscribes to the status changes (online or offline) of this distributed data object.
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
 
-- **Parameters**
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | type | string | Yes| Event type to subscribe to. The value is "status", which indicates the status (online or offline) change events.|
-  | callback | Callback<{ sessionId: string, networkId: string, status: 'online' \| 'offline' }> | Yes| Callback used to return the status changes of the distributed object. In the callback, **sessionId** indicates the session ID of the distributed object, and **status** indicates the online or offline status of the distributed object.|
+  | callback | Callback<{ sessionId: string, networkId: string, status: 'online' \| 'offline' }> | Yes| Callback used to return the online or offline status.<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
+**Example**
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'
   var g_object = distributedObject.createDistributedObject({name:"Amy", age:18, isVis:false, 
@@ -172,24 +188,24 @@ Subscribes to the status changes (online or offline) of this distributed object.
 off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, status: 'online' | 'offline' }>): void
 
 
-Unsubscribes from the status (online or offline) changes of the distributed object. 
+Unsubscribes from the status (online or offline) changes of the distributed data object. 
 
-** System Capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
+**System capability**: SystemCapability.DistributedDataManager.DataObject.DistributedObject
 
-- **Parameters**
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | type | string | Yes| Event type to subscribe to. The value is "status", which indicates the status (online or offline) change events.|
-  | callback | Callback<{ sessionId: string, networkId: string, status: 'online' \| 'offline' }> | No| Callback used to return the status changes. If this parameter is not specified, all the status change callbacks will be unregistered.|
+  | callback | Callback<{ sessionId: string, deviceId: string, status: 'online' \| 'offline' }> | No| Callback used to return the status changes. If this parameter is not specified, all the status change callbacks will be unregistered.<br>**sessionId** indicates the session ID of the distributed data object.<br>**deviceId** indicates the device ID of the distributed data object.<br>**status** indicates the status, which can be online or offline.|
 
 
-- Example
+**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 status change callback for the specified distributed object.
+  // Unsubscribe from the status change callback for the specified distributed data object.
   g_object.off("status", function (sessionId, networkId, status) {
       this.response += "status changed " + sessionId + " " + status + " " + networkId;
   });

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

@@ -4,7 +4,10 @@ Lightweight storage provides applications with data processing capability and al
 
 
 > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br/>
-> The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version. <br/>The APIs of this module are no longer maintained since API Version 9. You are advised to use [@ohos.data.preferences](js-apis-data-preferences.md).
+>
+> - The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+>
+> - The APIs of this module are no longer maintained since API Version 9. You are advised to use [`@ohos.data.preferences`](js-apis-data-preferences.md).
 
 
 ## Modules to Import
@@ -45,12 +48,18 @@ Reads a file and loads the data to the **Storage** instance in synchronous mode.
   ```
   import dataStorage from '@ohos.data.storage'
   import featureAbility from '@ohos.ability.featureAbility'
-
+  
   var context = featureAbility.getContext()
-  var path = await context.getFilesDir()
-  let storage = dataStorage.getStorageSync(path + '/mystore')
-  storage.putSync('startup', 'auto')
-  storage.flushSync()
+  context.getFilesDir((err, path) => {
+      if (err) {
+          console.error('getFilesDir failed. err: ' + JSON.stringify(err));
+          return;
+      }
+      console.info('getFilesDir successful. path:' + JSON.stringify(path));
+      let storage = dataStorage.getStorageSync(path + '/mystore')
+      storage.putSync('startup', 'auto')
+      storage.flushSync()
+  });
   ```
 
 
@@ -72,17 +81,23 @@ Reads a file and loads the data to the **Storage** instance. This method uses an
   ```
   import dataStorage from '@ohos.data.storage'
   import featureAbility from '@ohos.ability.featureAbility'
-
+  
   var context = featureAbility.getContext()
-  var path = await context.getFilesDir()
-  dataStorage.getStorage(path + '/mystore', function (err, storage) {
+  context.getFilesDir((err, path) => {
       if (err) {
-          console.info("Get the storage failed, path: " + path + '/mystore')
+          console.error('getFilesDir failed. err: ' + JSON.stringify(err));
           return;
       }
-      storage.putSync('startup', 'auto')
-      storage.flushSync()
-  })
+      console.info('getFilesDir successful. path:' + JSON.stringify(path));
+      dataStorage.getStorage(path + '/mystore', function (err, storage) {
+          if (err) {
+              console.info("Get the storage failed, path: " + path + '/mystore')
+              return;
+          }
+          storage.putSync('startup', 'auto')
+          storage.flushSync()
+      })
+  });
   ```
 
 
@@ -108,16 +123,22 @@ Reads a file and loads the data to the **Storage** instance. This method uses a
   ```
   import dataStorage from '@ohos.data.storage'
   import featureAbility from '@ohos.ability.featureAbility'
-
+  
   var context = featureAbility.getContext()
-  var path = await context.getFilesDir()
-  let promisegetSt = dataStorage.getStorage(path + '/mystore')
-  promisegetSt.then((storage) => {
-      storage.putSync('startup', 'auto')
-      storage.flushSync()
-  }).catch((err) => {
-      console.info("Get the storage failed, path: " + path + '/mystore')
-  })
+  context.getFilesDir((err, path) => {
+      if (err) {
+          console.info("Get the storage failed, path: " + path + '/mystore')
+          return;
+      }
+      console.info('getFilesDir successful. path:' + JSON.stringify(path));
+      let promisegetSt = dataStorage.getStorage(path + '/mystore')
+      promisegetSt.then((storage) => {
+          storage.putSync('startup', 'auto')
+          storage.flushSync()
+      }).catch((err) => {
+          console.info("Get the storage failed, path: " + path + '/mystore')
+      })
+  });
   ```
 
 
@@ -250,7 +271,7 @@ removeStorageFromCache(path: string): Promise&lt;void&gt;
 
 Removes the singleton **Storage** instance of a file from the cache. The removed instance cannot be used for data operations. Otherwise, data inconsistency will occur.
 
-This method uses a promise to return the result.
+This method uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
@@ -426,7 +447,7 @@ put(key: string, value: ValueType): Promise&lt;void&gt;
 
 Obtains the **Storage** instance corresponding to the specified file, writes data to the **Storage** instance using a **Storage** API, and saves the modification using **flush()** or **flushSync()**.
 
-This method uses a promise to return the result.
+This method uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
@@ -522,7 +543,7 @@ has(key: string): Promise&lt;boolean&gt;
 
 Checks whether the storage object contains data with a given key.
 
-This method uses a promise to return the result.
+This method uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
@@ -678,7 +699,7 @@ flush(): Promise&lt;void&gt;
 
 Saves the modification of this object to the **Storage** instance and synchronizes the modification to the file.
 
-This method uses a promise to return the result.
+This method uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
@@ -747,7 +768,7 @@ clear(): Promise&lt;void&gt;
 
 Clears this **Storage** object.
 
-This method uses a promise to return the result.
+This method uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core