docs: node

docs/en/09-connector/05-node.md

 ---
 sidebar_label: Node.js 
 title: TDengine Node.js Connector
----
\ No newline at end of file
+---
+
+ `td2.0-rest-connector` are the official Node.js language connectors for TDengine. Node.js developers can develop applications to access TDengine instance data. `td2.0-rest-connector` is a **REST connector** that connects to TDengine instances via the REST API. 
+
+The Node.js connector source code is hosted on [GitHub](https://github.com/taosdata/taos-connector-node).
+
+## Installation steps
+
+### Pre-installation
+
+Install the Node.js development environment
+### Install via npm
+
+```bash
+npm i td2.0-rest-connector
+```
+## Establishing a connection
+
+```javascript
+{{#include docs/examples/node/connect.js}}
+```
+
+## Usage examples
+
+```javascript
+{{#include docs/examples/node/reference_example.js:usage}}
+```
+
+## Important Updates
+
+
+| td2.0-rest-connector version | Description |
+| ------------------------- | ---------------------------------------------------------------- |
+| 1.0.5 | Support connect to TDengine cloud service
+
+## API Reference
+
+[API Reference](https://docs.taosdata.com/api/td2.0-connector/)
\ No newline at end of file

docs/examples/node/reference_example.js

+const { options, connect } = require("td2.0-rest-connector");
+options.url = process.env.TDENGINE_CLOUD_URL;
+options.query = { token: process.env.TDENGINE_CLOUD_TOKEN };
+
+// ANCHOR: usage
+let conn = connect(options);
+let cursor = conn.cursor();
+(async()=>{
+    let result = await cursor.query('show databases');
+    // print query result as taos shell
+    result.toString();
+    // Get Result object, return Result object.
+    console.log(result.getResult());
+    // Get status, return 'succ'|'error'.
+    console.log(result.getStatus());
+    // Get head,return response head (Array<any>|undefined,when execute failed this is undefined).
+    console.log(result.getHead());
+    // Get Meta data, return Meta[]|undefined(when execute failed this is undefined).
+    console.log(result.getMeta());
+    // Get data,return Array<Array<any>>|undefined(when execute failed this is undefined).
+    console.log(result.getData());
+    // Get affect rows,return number|undefined(when execute failed this is undefined).
+    console.log(result.getAffectRows());
+    // Get command,return SQL send to server(need to `query(sql,false)`,set 'pure=false',default true).
+    console.log(result.getCommand());
+    // Get error code ,return number|undefined(when execute failed this is undefined).
+    console.log(result.getErrCode());
+    // Get error string,return string|undefined(when execute failed this is undefined).
+    console.log(result.getErrStr());
+})()
+// ANCHOR_END: usage