javascript - nodejs socket emit return undefined

Question

I am trying to send to clients whenever a new connection issued.

My server side javascripts is :

var clients = 0;
io.sockets.on('connection', function (socket) {
clients ++;
console.log(clients);
socket.broadcast.emit('connect',socket.clients);
}

and my client side js to handle:

socket.on('connect', function (data) {
console.log('on'+data);});

the output is undefined (on undefined)

Where 's things wrong?

Answer 1

socket.broadcast.emit('connect',socket.clients);
                                ^^^^^^^^^^^^^^ this should be 'clients'

此外，connect是一个带有 的预定义事件socket.io，因此您不应重复使用它，否则它可能会产生意想不到的结果。

FWIW：将向除当前连接之外的socket.broadcast.emit所有连接发送消息。如果这不是您想要的（您希望将消息发送到所有连接），请改用）。io.sockets.emit