Don't try to load nonexisting cameras. Fix #103

js/main.js

@@ -381,6 +381,9 @@ class BrowserMod {
     `;
     document.body.appendChild(this._canvas);
     document.body.appendChild(this._video);
+    if(!navigator.mediaDevices) {
+      return;
+    }
     navigator.mediaDevices.getUserMedia({video: true, audio: false}).then((stream) => {
       this._video.srcObject = stream;
       this._video.play();

test/configuration.yaml

@@ -3,6 +3,9 @@ default_config:
 demo:
 
 browser_mod:
+  devices:
+    camdevice:
+      camera: true
 
 lovelace:
   mode: yaml