on method
Bind the channel's socket to an event and store the callback.
Implementation
SocketIoChannel on(String event, Function callback) {
listeners[event] = listeners[event] ?? [];
if (events[event] == null) {
events[event] = (props) {
String channel = props[0];
dynamic data = props[1];
if (name == channel && listeners[event]!.isNotEmpty) {
for (var cb in listeners[event]!) {
cb(data);
}
}
};
socket.on(event, events[event]);
}
listeners[event]?.add(callback);
return this;
}