diff --git a/public/index.js b/public/index.js
index b30af81..ccf1fe2 100644
--- a/public/index.js
+++ b/public/index.js
@@ -185,6 +185,26 @@ const getLocalStream = () => {
       hd   : { width: { ideal: 1280 }, height: { ideal: 720 } }
     }
   })
+
+  navigator.permissions.query(
+    // { name: 'camera' }
+    { name: 'microphone' }
+    // { name: 'geolocation' }
+    // { name: 'notifications' } 
+    // { name: 'midi', sysex: false }
+    // { name: 'midi', sysex: true }
+    // { name: 'push', userVisibleOnly: true }
+    // { name: 'push' } // without userVisibleOnly isn't supported in chrome M45, yet
+  ).then(function(permissionStatus){
+
+      console.log('navigator.permissions', permissionStatus.state); // granted, denied, prompt
+
+      permissionStatus.onchange = function(){
+          console.log("Permission changed to " + this.state);
+      }
+
+  })
+
   // navigator.mediaDevices.getUserMedia({
   //   audio: false,
   //   video: {
@@ -495,6 +515,7 @@ const closeCall = () => {
   resetCallSettings()
 }
 
+
 btnLocalVideo.addEventListener('click', getLocalStream)
 btnRecvSendTransport.addEventListener('click', goConnect)
 btnCloseCall.addEventListener('click', closeCall)
\ No newline at end of file