TelephonyCallGroup.onstatechange

The onstatechange property of the Telephony interface specifies an event listener to receive statechange events. These events occur when the call group's state (i.e. the value of Telephony.state) changes.

Syntax

myTelephonyCallGroup.onstatechange = function() { ... };

These events are of type CallEvent.

Examples

// Telephony object
var tel = navigator.mozTelephony;

// Make two calls; assume they are both answered
var call1, call2;
tel.dial(number1).then(call => call1 = call);
tel.dial(number2).then(call => call2 = call);

// Add both calls to the conference call
// Two entries will appear in conference.calls (call1, call2)
// but nothing in tel.calls
var conference = tel.conferenceGroup;
conference.add(call1, call2);

conference.onstatechange = function() {
  // Do something when the conference
  // call state changes
};

Specifications

Browser compatibility

For obvious reasons, support is primarily expected on mobile browsers.

See also

• Using the Web Telephony API
• TelephonyCall
• CallEvent
• Navigator.mozTelephony