lib/glimmer/ext/module.rb in glimmer-1.3.1 vs lib/glimmer/ext/module.rb in glimmer-2.0.0

@@ -1,11 +1,13 @@
-class Module
-  alias append_features_without_glimmer append_features
-  def append_features(mod)
-    if self == Glimmer && mod == Object
-      Glimmer::Config.logger.debug { 'Appending Glimmer to Singleton Class of main object (not appending to Object everywhere to avoid method pollution)' }
-      TOPLEVEL_BINDING.receiver.singleton_class.include(self)
-    else
-      append_features_without_glimmer(mod)
+unless RUBY_ENGINE == 'opal'
+  class Module
+    alias append_features_without_glimmer append_features
+    def append_features(mod)
+      if self == Glimmer && mod == Object
+        Glimmer::Config.logger.debug { 'Appending Glimmer to Singleton Class of main object (not appending to Object everywhere to avoid method pollution)' }
+        TOPLEVEL_BINDING.receiver.singleton_class.include(self)
+      else
+        append_features_without_glimmer(mod)
+      end
     end
   end
 end