Get the actual IP Adress in JavaScript

index.html

<script>
var pc = new RTCPeerConnection({iceServers:[]}), noop = function(){};
pc.createDataChannel(""); //create a bogus data channel
pc.createOffer(pc.setLocalDescription.bind(pc), noop); // create offer and set local description
pc.onicecandidate = function(ice){ //listen for candidate events
  if(!ice || !ice.candidate || !ice.candidate.candidate) return;
  var myIP = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/.exec(ice.candidate.candidate)[1];
  alert('My IP is: ' + myIP);
  pc.onicecandidate = noop;
};
</script>