====== is() ======

The is function returns the requested read-only boolean (true/false) parameter. The provided string argument decides what parameter value to return.

For example wrtc.is("camMuted") returns true if camera is currently muted.

===== Arguments =====
wrtc.is(key)
  * key - string containing what argument to return:

====  ====
| behindQturn | returns true if this PC is on a local LAN behind IXNX unit with QTURN server |
| camMuted | returns true if local camera is [[ixnx:wrtc:js:api:wrtc:mutecam|muted]] |
| channelReady | returns true if there is a websocket connection to the RTCgate server |
| lineAvailable | returns true if there is any free [[ixnx:wrtc:js:api:line:start|line]] object available not involved in any call but ready to receive incoming calls |
| localDataChannelSupport | undefined until first call has been made, then returns true if your browser supports [[ixnx:wrtc:js:data_channel|data channels]], false if not |
| https | returns true if webpage has been loaded using HTTPS |
| inCall | returns true if there is any ongoing call right now |
| inGroupCall | returns true if there is a group call going on right now |
| Internet | returns a promise that resolves to true/false within 2 seconds indicating if there is Internet access (or nothing if called within 5 seconds of previous call) |
| mediaAvailable | returns true if client at any point has had access to local mic or cam (even if [[ixnx:wrtc:js:api:wrtc:get|wrtc.get("localStream")]] right now is undefined) |
| micMuted | returns true if local microphone is [[ixnx:wrtc:js:api:wrtc:mutemic|muted]] |
| online | returns true if client is logged in to RTCgate server |
| overload | returns true if data connection to IXNX server experiences connection problems with excessive packet resends |
| SIP | returns true if all lines are SIP registered |
| pushNotifications | returns true if push notifications are enabled and active |
| useQturn | returns true if QTURN server is used |

You can also use same arguments as [[ixnx:wrtc:js:api:call:is|call.is()]] to see if there are any matching calls. Eg wrtc.is("connecting") returns true if any call is in progress of being connected right now.

===== Returns =====
Requested boolean (true/false) value. Return type depends on requested value, see table above

===== Events =====
None.