Recover gracefully if browser doesn't support getTransports()

Author: emlun

README

@@ -236,7 +236,9 @@ fetch(/* ... */)                    // Make the call that returns the credential
     response: {
       attestationObject: uint8arrayToBase64url(publicKeyCredential.response.attestationObject),
       clientDataJSON: uint8arrayToBase64url(publicKeyCredential.response.clientDataJSON),
-      transports: publicKeyCredential.response.getTransports() || [],
+
+      // Attempt to read transports, but recover gracefully if not supported by the browser
+      transports: publicKeyCredential.response.getTransports && publicKeyCredential.response.getTransports() || [],
     },
 
     // Warning: Client extension results could also contain binary data that needs encoding

webauthn-server-demo/src/main/webapp/js/webauthn.js

@@ -141,7 +141,7 @@
           response: {
             attestationObject: base64url.fromByteArray(response.response.attestationObject),
             clientDataJSON: base64url.fromByteArray(response.response.clientDataJSON),
-            transports: response.response.getTransports() || [],
+            transports: response.response.getTransports && response.response.getTransports() || [],
           },
           clientExtensionResults,
         };