屏幕分享

const trtcA = TRTC.create();
await trtcA.enterRoom({
  scene: 'rtc',
  sdkAppId: 140000000, // Fill in your sdkAppId
  userId: 'userA', // Fill in your userId
  userSig: 'userA_sig', // Fill in userSig corresponding to userId
  roomId: 6969
})
await trtcA.startScreenShare();

// Setting a view if you need to preview local screen sharing.
await trtcA.startScreenShare({ view: 'local-screen-sharing-element-id' });

const trtcB = TRTC.create();
trtcB.on(TRTC.EVENT.REMOTE_VIDEO_AVAILABLE, ({ userId, streamType }) => {
  // Main video stream
  if (streamType === TRTC.TYPE.STREAM_TYPE_MAIN) {
    trtcB.startRemoteVideo({ userId, streamType,  view: `${userId}_main` });
  } else {
    // Sub video stream, it's remote screen sharing.
    // 'view' is the element id of a div for video playback.
    trtcB.startRemoteVideo({ userId, streamType, view: `${userId}_screen` });
  }
});

await trtcB.enterRoom({
  scene: 'rtc',
  sdkAppId: 140000000, // Fill in your sdkAppId
  userId: 'userB', // Fill in your userId
  userSig: 'userB_sig', // Fill in userSig corresponding to userId
  roomId: 6969
})

await trtcA.startScreenShare({ option: { systemAudio: true }});

 // Stop screen sharing
 await trtcA.stopScreenShare();

 trtcB.on(TRTC.EVENT.REMOTE_VIDEO_UNAVAILABLE, ({ userId, streamType }) => {
    // Remote user stopped the screen sharing.
    if (streamType === TRTC.TYPE.STREAM_TYPE_SUB) {}
 })

// Listen for local screen sharing stop event
trtcA.on(TRTC.EVENT.SCREEN_SHARE_STOPPED, () => {
  console.log('screen sharing was stopped');
});