====== onVolume() ======
wrtc.onVolume() is called when [[ixnx:wrtc:js:api:wrtc:adv.volumemeter|wrtc.adv.volumeMeter()]] has sampled microphone volume.

You can use this event to display current microphone volume, like a volume meter instrument.

===== Occurs =====
Each time microphone volume has been sampled.

The number of [[ixnx:wrtc:js:api:wrtc:onvolume|wrtc.onVolume()]] events per second is determined by [[ixnx:wrtc:js:api:call:adv.stats_ms|call.adv.stats_ms]]

===== Arguments =====
wrtc.onVolume(arg)
  * arg - numeric value of current volume, 0-255.

===== Example =====
By varying the width of a div according to current volume value you get a volume meter bar.
  wrtc.onVolume(arg) {
      document.getElementById("volume").style.width = arg;
  }
  ...
  <div id="volume" style="display:inline-block;height:8px;background-color:#ffff00;transition: width 0.6s;"></div>

===== See also =====
[[ixnx:wrtc:js:api:wrtc:adv.volumemeter|wrtc.adv.VolumeMeter()]]