How to customize ChatMessageInfo / chat author CSS (there is no widget?)

Hey,

I think it won’t be easy. There is no available PluginOutlet in this area (don’t hesitate to request it!)

If you want to add only classnames, you should be able to do this way:

api.modifyClass(
  "component:chat/message/info",
  (Superclass) =>
    class extends Superclass {
      get usernameClasses() {
        let classes = super.usernameClasses;

        // Add extra classes
        classes += " developer";

        return classes;
      }
    }
)

it overwrites this code: