Offline behavior

Buffered events​

By default, any event emitted while the Socket is not connected will be buffered until reconnection.

While useful in most cases (when the reconnection delay is short), it could result in a huge spike of events when the connection is restored.

There are several solutions to prevent this behavior, depending on your use case:

• use the connected attribute of the Socket instance

if(socket.connected){
 socket.emit(/* ... */);
}else{
// ...
}

• use volatile events

socket.volatile.emit(/* ... */);

• empty the internal buffer upon reconnection

socket.on("connect",()=>{
 socket.sendBuffer=[];
});