开发，主要是对 “会话” 与 “监听器” 接口的应用组合！另外，客户端使用单连接即可：

```javascript
//如果不能连接正常返回（由心跳尝试不断连接）
const session = await SocketD.createClient("sd:ws://127.0.0.1:8602/?u=a&p=2")
        .open();

//如果不能连接则异常
const session = await SocketD.createClient("sd:ws://127.0.0.1:8602/?u=a&p=2")
        .openOrThow();
```

目前 JavaScript 的传输适配有：

| 适配               | 基础传输协议      | 支持端 | 安全  | 备注              |  支持平台                   |
|------------|--------------|------|-----|------------|------------------|
| socket.d.js      | sd:ws, sd:wss              | c        | ssl    | nio（41kb）    | 浏览器, uniapp(h5, android, ios), weixin, node.js |

功效：

* 在前端接口开发时，socket.d 协议可同时可替代 http 和 ws


### 引用库文件或安装模块包


* js.zip（for Browser, WebView...）

[https://gitee.com/noear/socket.d/releases/download/v2.5.20/socket.d.js.zip](https://gitee.com/noear/socket.d/releases/download/v2.5.20/socket.d.js.zip)
<br>
[https://github.com/noear/socket.d/releases/download/v2.5.20/socket.d.js.zip](https://github.com/noear/socket.d/releases/download/v2.5.20/socket.d.js.zip)


```html
<script src="https://cdn.jsdelivr.net/gh/noear/socket.d@2.5.20/javascript/release/socket.d.js"></script>
<script>
//全局单例即可
const session = await SocketD.createClient("sd:ws://127.0.0.1:8602/?token=1b0VsGusEkddgr3d")
        .open();
</script>
```


* js-esm.zip （for Vue, Wechat...）

[https://gitee.com/noear/socket.d/releases/download/v2.5.20/socket.d.esm.js.zip](https://gitee.com/noear/socket.d/releases/download/v2.5.20/socket.d.esm.js.zip)
<br>
[https://github.com/noear/socket.d/releases/download/v2.5.20/socket.d.esm.js.zip](https://github.com/noear/socket.d/releases/download/v2.5.20/socket.d.esm.js.zip)

```javascript
import {SocketD} from "socket.d.esm"

//全局单例即可
const session = await SocketD.createClient("sd:ws://127.0.0.1:8602/?token=1b0VsGusEkddgr3d")
        .open();
```


* npm（for All...）

```
npm install @noear/socket.d@2.5.20
```

```
// CommonJS
const {SocketD} = require("@noear/socket.d")
// ES modules
import {SocketD} from "@noear/socket.d"

//全局单例即可
const session = await SocketD.createClient("sd:ws://127.0.0.1:8602/?token=1b0VsGusEkddgr3d")
        .open()
```