The Presentation API lets a user agent (such as a Web browser) effectively display web content through large presentation devices such as projectors and network-connected televisions. Supported types of multimedia devices include both displays which are wired using HDMI, DVI, or the like, or wireless, using DLNA, Chromecast, AirPlay, or Miracast....then((list) => { list.connections.forEach((connection)...addConnection(connection); }); list.onconnectionavailabl = (evt)...