ちゃっと

chat.js

var WebSocket = require('ws');

var wss = new WebSocket.Server({'port': 8080});

wss.broadcast = function(data) {
	this.clients.forEach(function(client){
		client.send(data);
	});
};

wss.on('connection', function(connection){
	connection.on('message', function(message){
		wss.broadcast(message);
	});
});