您可以简单地将用户ID分配给数组CLIENTS []，其中将包含所有用户。您可以直接向所有用户发送消息，如下所示：
var WebSocketServer = require('ws').Server,
wss = new WebSocketServer({port: 8080}),
CLIENTS=[];
wss.on('connection', function(ws) {
CLIENTS.push(ws);
ws.on('message', function(message) {
console.log('received: %s', message);
sendAll(message);
});
ws.send("NEW USER JOINED");
});
function sendAll (message) {
for (var i=0; i<CLIENTS.length; i++) {
CLIENTS[i].send("Message: " + message);
}
}
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