still trying to get the code working inside an engine (was fine in app)

lib/vue_r/engine.rb

@@ -1,7 +1,13 @@
 require "opal-rails"
+require "opal-browser"
 
 module VueR
   class Engine < ::Rails::Engine
     isolate_namespace VueR
+
+    initializer "vue_r.assets.precompile" do |app|
+      app.config.assets.precompile += %w( vue_r.js )
+    end
+
   end
 end