[keycloak-user] Configuring javascript calling REST service

I'm using the keycloak javascript adapter and the spring security adapter for my REST service. The REST service is configured as a client with 'bearer-only' access type. The javascript client is authenticated. When it does an ajax call to my REST service I receive the following error in my browser: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:30001/rest1/greeting. (Reason: CORS header 'Access-Control-Allow-Origin' missing). I have added "enable-cors": true to my REST keycloak configuration. However where do I configure which origins are allowed? For 'public' and 'confidential' clients you can configure the web origins in the admin console. But when I set it to 'bearer-only' this field is gone. So what exactly are the steps you have to take to configure a javascript client that call a REST service on another host?