How can i use js codes in construct and get its result ?

	function checkTURNServer(turnConfig, timeout){ 

 return new Promise(function(resolve, reject){

 setTimeout(function(){
 if(promiseResolved) return;
 resolve(false);
 promiseResolved = true;
 }, timeout || 5000);

 var promiseResolved = false
 , myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection //compatibility for firefox and chrome
 , pc = new myPeerConnection({iceServers:[turnConfig]})
 , noop = function(){};
 pc.createDataChannel(""); //create a bogus data channel
 pc.createOffer(function(sdp){
 if(sdp.sdp.indexOf('typ relay') > -1){ // sometimes sdp contains the ice candidates...
 promiseResolved = true;
 resolve(true);
 }
 pc.setLocalDescription(sdp, noop, noop);
 }, noop); // create offer and set local description
 pc.onicecandidate = function(ice){ //listen for candidate events
 if(promiseResolved || !ice || !ice.candidate || !ice.candidate.candidate || !(ice.candidate.candidate.indexOf('typ relay')>-1)) return;
 promiseResolved = true;
 resolve(true);
 };
 }); 
}
checkTURNServer({
 url: 'turn:127.0.0.1',
 username: 'test',
 credential: 'test'
}).then(function(bool){
 console.log('is TURN server active? ', bool? 'yes':'no');
}).catch(console.error.bind(console))