add doc

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/application-dev/reference/apis/js-apis-system-notification.md

+# Notification
+
+> ![icon-note.gif](../public_sys-resources/icon-note.gif) **NOTE**<br/>
+> - The APIs of this module are no longer maintained since API version 7. You are advised to use [`@ohos.notification`](js-apis-notification.md).
+> 
+> - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import notification from '@system.notification';
+```
+
+## ActionResult
+
+**System capability**: SystemCapability.Notification.Notification
+
+| Name       | Readable| Writable| Type                                          | Mandatory| Description                     |
+| ----------- | --- | ---- | ---------------------------------------------- | ---- | ------------------------- |
+| bundleName  | Yes | Yes | string                                          | Yes  | Name of the application bundle to which the notification will be redirected after being clicked.                 |
+| abilityName | Yes | Yes | string                                          | Yes  | Name of the application ability to which the notification will be redirected after being clicked.|
+| uri         | Yes | Yes | string                                          | No  | URI of the page to be redirected to.             |
+
+
+## ShowNotificationOptions
+
+**System capability**: SystemCapability.Notification.Notification
+
+| Name         | Readable| Writable| Type                                          | Mandatory| Description                       |
+| ------------- | --- | ---- | ---------------------------------------------- | ---- | ------------------------- |
+| contentTitle  | Yes | Yes | string                                          | No  | Notification title.                 |
+| contentText   | Yes | Yes | string                                          | No  | Notification content.                 |
+| clickAction   | Yes | Yes | ActionResult                                    | No  | Action triggered when the notification is clicked.    |
+
+
+## notification.show
+
+show(options?: ShowNotificationOptions): void
+
+Displays a notification.
+
+**System capability**: SystemCapability.Notification.Notification
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| options | ShowNotificationOptions | No| Notification title.|
+
+**Example**
+```javascript
+export default {    
+  show() {        
+    notification.show({            
+      contentTitle: 'title info',            
+        contentText: 'text',            
+        clickAction: {                
+          bundleName: 'com.example.testapp',                
+          abilityName: 'notificationDemo',                
+          uri: '/path/to/notification',            
+         },
+     });    
+  },
+}
+;
+```

en/application-dev/reference/apis/js-apis-system-request.md

@@ -53,7 +53,7 @@ Uploads files.
 | name | string | Yes | Name of the form element |
 | value | string | Yes | Value of the form element |
 
-The following values will be returned when the files are successfully uploaded.
+When the files are successfully uploaded, the following values will be returned.
 
 | Name | Type | Description |
 | -------- | -------- | -------- |
@@ -61,6 +61,8 @@ The following values will be returned when the files are successfully uploaded.
 | data | string | Content returned by the server. The value type is determined by the type in the returned headers. |
 | headers | Object | Headers returned by the server. |
 
+When the files fail to be uploaded, an HTTP status code is returned in **code** of **data**.
+
 **Example**
 
 ```