WebSocket

跨浏览器窗口,7种方式 模拟聊天室 服务端代码 ```javascript const WebSocket = require('ws');

    const server = new WebSocket.Server({
    port: 8080
    });

    server.on('open', function open() {
    console.log('connected');
    });

    server.on('close', function close() {
    console.log('disconnected');
    });

    server.on('connection', function connection(ws, req) {
    const ip = req.connection.remoteAddress;
    const port = req.connection.remotePort;
    const clientName = ip + port;

    console.log('%s is connected', clientName)

    // 发送欢迎信息给客户端
    ws.send("Welcome " + clientName);

    ws.on('message', function incoming(message) {
        console.log('received: %s from %s', message, clientName);

        // 广播消息给所有客户端
        server.clients.forEach(function each(client) {
        if (client.readyState === WebSocket.OPEN) {
            client.send(clientName + " -> " + message);
        }
        });

    });

    });
```

客户端的实现 ```javascript