websocket.js

const WebSocket = require("ws");

const server = new WebSocket.Server({port: 8888});

server.on('open', function close(){
    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");
    ws.send('Welcome' + clientName);

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

        server.clients.forEach(function each(client) {
            if(client.readyState == WebSocket.OPEN) {
                client.send(clientName + " -> "+ message);
            };
        });
    });
});