Network exception handling

The long connection service has higher requirements on the network quality. When using the netless whiteboard, you must deal with network abnormal conditions.

Callback provided by netless when the network is abnormal

const room = whiteWebSdk.joinRoom({
                uuid: uuid,
                roomToken: roomToken,
                {
                    onPhaseChanged: phase => {
                        console.log(`room ${"uuid"} changed: ${phase}`);
                        // When the connection status of the whiteboard changes, the phase may change to the following states
                        // Connecting = "connecting",
                        // Connected = "connected",
                        // Reconnecting = "reconnecting",
                        // Disconnecting = "disconnecting",
                        // Disconnected = "disconnected",
                    },
                });

Principles for handling network exceptions

1. The member methods and member properties of room cannot be operated in the disconnected state.

   phase === "connected" // It is the state that the room is connected to the server, and the other four states must be stationary.
   

2. Code case

       // This member method cannot be called
       room.setViewMode(ViewMode.Broadcaster);
       // This member property cannot be assigned
       room.disableCameraTransform = false;
   

3. Error cases