send socket message to channel socket io server code example
Example: emit cheatsheet
io.on("connection", (socket) => {
// sending to the client
socket.emit("hello", "can you hear me?", 1, 2, "abc");
// sending to all clients except sender
socket.broadcast.emit("broadcast", "hello friends!");
// sending to all clients in "game" room except sender
socket.to("game").emit("nice game", "let's play a game");
// sending to all clients in "game1" and/or in "game2" room, except sender
socket.to("game1").to("game2").emit("nice game", "let's play a game (too)");
// sending to all clients in "game" room, including sender
io.in("game").emit("big-announcement", "the game will start soon");
// sending to all clients in namespace "myNamespace", including sender
io.of("myNamespace").emit("bigger-announcement", "the tournament will start soon");
// sending to a specific room in a specific namespace, including sender
io.of("myNamespace").to("room").emit("event", "message");
// sending to individual socketid (private message)
io.to(socketId).emit("hey", "I just met you");
// WARNING: `socket.to(socket.id).emit()` will NOT work, as it will send to everyone in the room
// named `socket.id` but the sender. Please use the classic `socket.emit()` instead.
// sending with acknowledgement
socket.emit("question", "do you think so?", (answer) => {});
// sending without compression
socket.compress(false).emit("uncompressed", "that's rough");
// sending a message that might be dropped if the client is not ready to receive messages
socket.volatile.emit("maybe", "do you really need it?");
// sending to all clients on this node (when using multiple nodes)
io.local.emit("hi", "my lovely babies");
// sending to all connected clients
io.emit("an event sent to all connected clients");
});