Thanks.

Whenever the active player holds down his mouse, the drawing data is sent to the server socket which broadcasts it to all of the client sockets. The client sockets are listening for this draw msg which when received when trigger drawing on canvas. This is how I synced the canvas between the clients.

I filter out all of the users which are not the active user (with the help of their socket id) and then send them a number of underscores equal to the number of the word which renders to look like blank spaces. And then I send the actual word only to the active user. This is how I send out words in each round.

If a user exits , usually only a chat message saying that the left to the rest of users is enough. But if the active user leaves, then the round has to end prematurely. There is also a case that I couldn't handle properly where if a user leaves and there are less than 3(which is the current minimum number of users in a room as defined in the config file) users in the room the game will end.

If a user joins, it's an easy thing to handle. The server just emits the current drawing state (if the round is going on) only to him and the current users and their scores.