//Create a screen sharing stream
const localStream = TRTC.createStream({ audio: false, screen: true });
//Listen for the screen sharing stopping event
localStream.on('screen-sharing-stopped', event => {
  console.log('screen sharing was stopped');
});

//Initialize the screen sharing stream
localStream.initialize().then(() => {
  console.log('screencast stream init success');
  //Publish the screen sharing stream
  client.publish(localStream).then(() => {
    console.log('screen casting');
  });
});

//Use a separate user ID to publish the screen sharing stream
const shareId = 'share-userId';
const shareClient = TRTC.createClient({ mode: 'rtc', sdkAppId, userId, shareId, userSig });

//Unsubscribe from all remote streams for `shareClient` (The client only publishes the screen sharing stream.)
shareClient.on('stream-added', event => {
  const remoteStream = event.stream;
  shareClient.unsubscribe(remoteStream);
});
shareClient.join({ roomId }).then(() => {
  console.log('shareClient join success');
  //Create a screen sharing stream
  const localStream = TRTC.createStream({ audio: false, screen: true });
  localStream.initialize().then(() => {
    // screencast stream init success
    shareClient.publish(localStream).then(() => {
      console.log('screen casting');
    });
  });
});

//Unsubscribe from the stream of `shareId` for the main client
client.on('stream-added', event => {
  const remoteStream = event.stream;
  const remoteUserId = remoteStream.getUserId();
  if (remoteUserId === shareId) {
    //Unsubscribe from the screen sharing stream
    client.unsubscribe(remoteStream);
  } else {
    //Subscribe to other remote streams
    client.subscribe(remoteStream);
  }
});