update docs

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

en/application-dev/reference/apis/Readme-EN.md

@@ -119,6 +119,7 @@
 
 - File Management
 
+  - [@ohos.document](js-apis-document.md)
   - [@ohos.environment](js-apis-environment.md)
   - [@ohos.fileio](js-apis-fileio.md)
   - [@ohos.fileManager](js-apis-filemanager.md)

en/application-dev/reference/apis/js-apis-document.md

+# File Interaction
+
+> ![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.
+- The APIs of this module will be deprecated and are not recommended for use. An exception will be thrown if any of the APIs is called.
+## Modules to Import
+
+```js
+import document from '@ohos.document';
+```
+
+## document.choose
+
+choose(type:string[]): Promise&lt;string&gt;
+
+Chooses a file of the specified type using the file manager. This method uses a promise to return the result.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+- Parameters
+
+  | Name| Type  | Mandatory| Description                        |
+  | ------ | ------ | ---- | ---------------------------- |
+  | type   | string[] | No  | Type of the file to choose.|
+
+- Return value
+
+  | Type                 | Description          |
+  | --------------------- | -------------- |
+  | Promise&lt;string&gt; | Promise used to return the result. An error code is returned.|
+
+- Example
+
+  ```js
+  await document.choose(type);
+  ```
+## document.choose
+
+choose(callback:AsyncCallback&lt;string&gt;): void
+
+Chooses a file using the file manager. This method uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+- Parameters
+
+  | Name  | Type                       | Mandatory| Description                        |
+  | -------- | --------------------------- | ---- | ---------------------------- |
+  | callback | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the result. An error code is returned.|
+
+- Example
+
+  ```js
+  await document.choose(function(err, uri) {
+        // Do something with the URI. 
+  });
+  ```
+## document.choose
+
+choose(type:string[], callback:AsyncCallback&lt;string&gt;): void
+
+Chooses a file of the specified type using the file manager. This method uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+- Parameters
+
+  | Name  | Type                       | Mandatory| Description                        |
+  | -------- | --------------------------- | ---- | ---------------------------- |
+  | type     | string[]                      | No  | Type of the file to choose.|
+  | callback | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the result. An error code is returned.|
+
+- Example
+
+  ```js
+  await document.choose(type, function(err, uri) {
+        // Do something with the URI. 
+  });
+  ```
+
+## document.show
+
+show(url:string, type:string):Promise&lt;number&gt;
+
+Opens a file. This method uses a promise to return the result.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+- Parameters
+
+  | Name| Type  | Mandatory| Description                        |
+  | ---- | ------ | ---- | ---------------------------- |
+  | uri | string | Yes  | URI of the file to open.|
+  | type | string | Yes  | Type of the file to open.|
+
+- Return value
+
+  | Type                 | Description        |
+  | --------------------- | ------------ |
+  | Promise&lt;void&gt; | Promise used to return the result. An error code is returned.|
+
+- Example
+
+  ```js
+  await document.show(uri, type);
+  ```
+
+## document.show
+
+show(url:string, type:string, callback:AsyncCallback&lt;void&gt;): void
+
+Opens a file. This method uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.FileManagement.File.FileIO
+
+- Parameters
+
+  | Name  | Type                       | Mandatory| Description                        |
+  | -------- | --------------------------- | ---- | ---------------------------- |
+  | uri | string | Yes  | URI of the file to open.|
+  | type | string | Yes  | Type of the file to open.|
+  | callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result. An error code is returned.  |
+
+- Example
+
+  ```js
+  await document.show(uri, type, function(err) {
+        //do something
+  });
+  ```