socket.io: why doesn't this broadcast statement work?

Question

I'm trying to use broadcast statement to send messages to specific user.
However, when I'm starting with self-sending messages using the following statement, it doesn't work. The client side cannot receive the message. So what's wrong with this statement?

io.on('connection', function(socket) {
  socket.on('message', function(msg) {
    socket.broadcast.to(socket.id).emit('message', msg);
  });
});

(purpose of this code: the client side send a piece of message named 'message', the server receive the message and send back to the same client)

If you're sending back to a single socket connection, why not just use `socket.send`? — Ben Fortune, Aug 12 '16 at 11:25
So how can I send to a client with specific id using socket.send? — neolicd, Aug 12 '16 at 11:38

score 0 · Answer 1 · edited May 23 '17 at 12:01

0

socket.broadcast.to broadcasts to all sockets in the given room, except to the socket on which it was called while io.sockets.in broadcasts to all sockets in the given room. (cited from Daniel Baulig's answer to another question:)
Socket.io rooms difference between broadcast.to and sockets.in

edited May 23 '17 at 12:01

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answered Aug 12 '16 at 12:58

neolicd

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socket.io: why doesn't this broadcast statement work?

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