only 1 client to receive emit socket.io code example
Example: socket io emit to specific client
Let me make it simpler with socket.io rooms. request a server
with a unique identifier to join a server. here we are using
an email as a unique identifier.
Client Socket.io
socket.on('connect', function () {
socket.emit('join', {email: user@example.com});
});
When the user joined a server, create a room for that user
Server Socket.io
io.on('connection', function (socket) {
socket.on('join', function (data) {
socket.join(data.email);
});
});
Now we are all set with joining. let emit something to from the
server to room, so that user can listen.
Server Socket.io
io.to('[email protected]').emit('message', {msg: 'hello world.'});
Let finalize the topic with listening to message event to the
client side
socket.on("message", function(data) {
alert(data.msg);
});
The reference from Socket.io rooms