Callbacks are not supported when broadcasting

问题

Here I am facing one issue with Callbacks in socket.io with nodejs

io.sockets.to(usersocketid).emit('receivemsg', 
{'success':'1','data':message},function(deliverycb){ 
    console.log('delivery call back');
    console.log(deliverycb);
});

Where i am facing error of Callbacks are not supported when broadcasting so anyone have solution of this.

回答1:

Emit doesn't have any callback. Broadcast your data first and then log it into console.

let broadcastData = {'success':'1','data':message};
io.sockets.to(usersocketid).emit('receivemsg',broadcastData );
console.log('delivery call back');
console.log(broadcastData );

来源：https://stackoverflow.com/questions/52676171/callbacks-are-not-supported-when-broadcasting