1.0.0-beta6 (April 20, 2017)

New Features

• You can now connect to a Room using an Array of MediaStreamTracks without
  constructing LocalAudioTracks or LocalVideoTracks. For example, if you
  already have a reference to a MediaStream, stream, you can call
  

  connect(token, { tracks: stream.getTracks() });

• You can now call LocalParticipant's addTrack and removeTrack methods
  with a MediaStreamTrack. If successful, these methods return the LocalTrack
  added or removed; otherwise, they return null.

• Added two new methods to LocalParticipant, addTracks and removeTracks, for
  adding and removing multiple LocalTracks at a time. These methods accept
  either an Array of LocalTracks or MediaStreamTracks, and return an Array of
  the LocalTracks added or removed. For example, if you already have a reference
  to a MediaStream, stream, you can call

  localParticipant.addTracks(stream.getTracks());

  localParticiapnt.removeTracks(stream.getTracks());

Bug Fixes

• Fixed a bug where attempting to remove a LocalTrack from the LocalParticipant
  after disconnecting from a Room threw an Error (JSDK-1233)
  
• Fixed a regression between 1.0.0-beta4 and 1.0.0-beta5 where
  automatically-acquired LocalTracks were not stopped after disconnecting from
  the Room
  
• Fixed a bug that could lead to media- and Track-related failures that
  resulting from the way we handle out-of-order SDP offers and answers; now,
  all PeerConnections will wait until an initial round of negotiation is
  complete before applying or creating subsequent offers (JSDK-1176)
  
• Fixed a bug where calling cancel on the CancelablePromise returned by
  connect could throw an Error
  
• Fixed a bug in the LocalAudioTrack and LocalVideoTrack constructors: options
  should have been optional (JSDK-1251)
  
• Fixed a bug where Room's getStats method could reject if outbound statistics
  were missing in Firefox
  
• Fixed a bug where Room's getStats method could reject if called after
  disconnecting from a Room in Firefox
  
• Fixed a bug in our message retry logic that caused us to retry messages after
  disconnecting from a Room
  

Known Issues

• Despite the addition of addTracks, adding multiple LocalTracks in quick
  succession is likely to cause media failures, and so it is recommended to
  either

  • Stagger the addition or removal of LocalTracks, or
    
  • Use the enable and disable functionality in lieu of adding and removing
    LocalTracks.
    

A solution has been identified and will be included in the next release.

• There exists an interoperability issue between Firefox and other WebRTC
  implementations (including Chrome and Twilio's iOS and Android SDKs) that can
  cause media failures if Firefox does not share a LocalAudioTrack. If you are
  developing an application that will interoperate with Firefox, please ensure
  you always share a LocalAudioTrack until this issue is resolved. You can
  share a muted LocalAudioTrack by calling disable. For example,
  

  localAudioTrack.disable();