diff --git a/public/main.js b/public/main.js
index ac3c16a..b07166a 100644
--- a/public/main.js
+++ b/public/main.js
@@ -186,11 +186,31 @@ var app = new Vue({
       this.attachSinkId(document.querySelector('#localVideo'), audioDestination);
     },
     gotStream: function gotStream(stream) {
-      this.stream = stream; // make stream available to console
+      console.log('gotStream', this.stream, stream);
+      if (this.stream) {
+        const oldVideo = this.stream.getTracks().find(track => track.kind === 'video');
+        this.stream.removeTrack(oldVideo);
+        this.stream.addTrack(stream);
+      } else {
+        this.stream = stream; // make stream available to console
+      }
       document.querySelector('#localVideo').srcObject = stream;
       // Refresh button list in case labels have become available
       return navigator.mediaDevices.enumerateDevices();
     },
+    shareScreen: async function shareScreen() {
+      // if (!displayMediaStream) {
+        const displayMediaStream = await navigator.mediaDevices.getDisplayMedia();
+      // }
+      // senders.find(sender => sender.track.kind === 'video').replaceTrack(displayMediaStream.getTracks()[0]);
+
+      //show what you are showing in your "self-view" video.
+      // document.getElementById('self-view').srcObject = displayMediaStream;
+
+      //hide the share button and display the "stop-sharing" one
+      // document.getElementById('share-button').style.display = 'none';
+      // document.getElementById('stop-share-button').style.display = 'inline';
+    },
     handleError: function handleError(error) {
       console.log('navigator.MediaDevices.getUserMedia error: ', error.message, error.name);
     },
diff --git a/views/index.ejs b/views/index.ejs
index 12af9dc..cfb8934 100644
--- a/views/index.ejs
+++ b/views/index.ejs
@@ -72,6 +72,8 @@
                   <label for="videoSource">Video source: </label>
                   <select id="videoSource" v-on:change="start" class="form-control"></select>
                 </div>
+                <!-- share screen -->
+                <span class="btn btn-primary" v-on:click="shareScreen()">Share screen</span>
               </details> 
             </div>
           </div>